Free Redacted Document - District Court of Delaware - Delaware

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IN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF DELAWARE POWER INTEGRATIONS, INC., a Delaware corporation, Plaintiff, V. BCD SEMICONDUCTOR CORPORATION, a California corporation, SHANGHAI SIM-BCD SEMICONDUCTOR MANUFACTURING, CO., LTD, a China corporation, Defendants.

C.A. No. 07-633-JJF

REDACTED

DECLARATION OF ROBERT BLAUSCHILD
FISH & RICHARDSON P.C. William J. Marsden, Jr. (#2247) ([email protected]) Kyle Wager Compton (#4693) ([email protected]) 919 N. Market Street, Suite 1100 P.O. Box 1114

Wilmington, DE 19899-1114 Telephone: (302) 652-5070 Facsimile: (302) 652-0607
Frank E. Scherkenbach 225 Franklin Street Boston, MA 02110-2804 Telephone: (617) 542-5070 Facsimile: (617) 542-8906 Howard G. Pollack Michael R. Headley

500 Arguello Street, Suite 500 Redwood City, CA 94063 Telephone: (650) 839-5070 Facsimile: (650) 839-5071
Attorneys for Plaintiff POWER INTEGRATIONS, INC. DATED : January 25, 2008

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REDACTED
IN THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF DELAWARE POWER INTEGRATIONS, INC., a Delaware corporation, Plaintiff, V. BCD SEMICONDUCTOR CORPORATION, a California corporation, SHANGHAI SIM-BCD SEMICONDUCTOR MANUFACTURING, CO., LTD, a China corporation, Defendants.

C.A. No. 07-633-JJF

DECLARATION OF ROBERT BLAUSCHILD
I, Robert Blauschild, declare as follows: 1. I have been retained by Power Integrations as an expert witness in this

matter. I have acted as an expert witness for Power Integrations in previous matters, including the Power Integrations v. Fairchild matter in this Court. 2. I am familiar with U.S. Patent No. 6,249,876 ("the '876 patent") through

my prior work with Power Integrations. In forming the opinions set forth below, I have reviewed and applied this Court's previous construction of the terms of the '876 patent as set forth in the claim construction order issued in connection with the Power Integrations v. Fairchild case. 3. I have also reviewed BCD's own datasheets, which are publicly available

on BCD's website, for the AP3700/A (rev 1.3, June 2007), AP3700E (rev 1.0, December 2007), and AP3710 (rev 1.1, October 2007) chips. These datasheets are attached as Exhibits A-C, respectively. 4. I have additionally reviewed, from the documents bates labeled PIB 001182-1209 and attached as

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REDACTED
Exhibit D.

5.

Based on the above documents and as described in detail in the claim chart

below, I conclude that the AP3700, AP3700A, AP3700E, and AP3710 chips contain each and every claim limitation of claim 1 of the '876 patent. 6. I also conclude that the claimed frequency jittering circuit, what BCD's

literature describes as a "frequency dither" or "frequency dithering" feature, is a default feature for each of the BCD chips named above, that it cannot be disabled by a user, and therefore that the infringing frequency jittering circuit present in the BCD chips is always enabled and operating when the chip is used as intended in a power conversion application. 7. Based on my review of the materials noted above and attached to this

declaration, the BCD parts literally contain each and every element of claim 1 of the '876 patent as follows (the referenced figures are included after the chart):

Tnfrin ement , A digital frequency jittering circuit for varying the switching frequency of a power supply, comprising:

Infrin " ement Contention A ainst BCD AP3700

I

This analysis applies equally to the AP3700, AP3700A, AP3700E, and AP3710. Based on my review of BCD's datasheets describing the "frequency dither" and "frequency dithering" features, which describe the features substantially identically for all part numbers, including showing what appears to be an identical oscilloscope waveform of the jittering in each datasheet, I conclude that the internal circuits used to bring about the frequency jittering appear to be substantially identical in all these products. [See AP3700/A datasheet, Rev. 1.3 (June 2007); AP3700E datasheet, Rev. 1.0 (Dec. 2007); AP3710 datasheet, Rev 1.1 (Oct. 2007).]

2

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REDACTED
Infringement

Infringement. Contentio n Ag ainst BCD AP3700

an oscillator for generating a signal having a switching frequency, the oscillator having a control input for varying the switching frequency;

a digital to analog converter coupled to the control input for varying the switching frequency; and

3

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REDACTED
Infringement a counter coupled to the output of the
oscillator and to the digital to analog converter, the counter causing the digital to analog converter to adjust the control input and to vary the switching frequency.

Infringement Contention AgainstBCD AJ3700a

4

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I declare under penalty of perjury under the laws of the United States of America that the foregoing is true and correct.
Executed this 23rd day of January , 2008, at Los Altos, CA.

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CERTIFICATE OF SERVICE I hereby certify that on January 25, 2008, I caused to be served the DECLARATION OF ROBERT BLAUSCHILD on the following individuals, in the manner indicated: VIA HAND DELIVERY AND E-MAIL Steven J. Balick John Day Tiffany Lydon 500 Delaware Avenue, 17`h Floor P.O. Box 1150 Wilmington, DE 19899 VIA E-MAIL AND FIRST CLASS MAIL E. Robert Yoches Joyce Craig Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. 901 New York Avenue, NW Washington, DC 20001-4413 VIA E-MAIL AND FIRST CLASS MAIL Erik R. Puknys Finnegan, Henderson, Farabow, Garrett & Dunner LLP Stanford Research Park 3300 Hillview Avenue Palo Alto, CA 94304-1203 VIA E-MAIL AND FIRST CLASS MAIL Robert L. Burns Finnegan, Henderson, Farabow, Garrett & Dunner LLP Two Freedom Drive Reston, VA 20190-5675 Attorneys for Defendants BCD SEMICONDUCTOR CORPORATION and SHANGHAI S11\4-BCD SEMICONDUCTOR MANUFACTURING, CO., LTD

Attorneys for Defendants BCD SEMICONDUCTOR CORPORATION and SHANGHAI SIM-BCD SEMICONDUCTOR MANUFACTURING, CO., LTD

Attorneys for Defendants BCD SEMICONDUCTOR CORPORATION and SHANGHAI SIM-BCD SEMICONDUCTOR MANUFACTURING, CO., LTD

Attorneys for Defendants BCD SEMICONDUCTOR CORPORATION and SHANGHAI SIM-BCD SEMICONDUCTOR MANUFACTURING, CO., LTD

Ky

agner

^' Q_13-s
mpton

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Exhibit A

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER General Description
The AP3700/Aseriesgreen-mode pulse width detectors AZ70XX is a ICs are under voltage modulawith a built in voltage threshold and low power low tion (PWM) controller. It is specially designed for consumption. The AZ70XX are specifically designed to power applications such as off-line battery chargers, accurately monitor power supplies. where the needs for low standby power, space saving and low cost are all required. In a battery charger rated 5V/1A, the maximum precision on-chip only 0.18Watt. The AZ70XX use a standby power is voltage reference and a comparator to measure the input operating voltage. These ICs can accurately reset the system and In normal operation, the AP3700/A switches on after detecting voltage at the time of switching kHz. on and off at a fixed switching frequency of 60 power With a instantaneous power off in 460mA for systems current limit capability of various CPU AP3700 and other logic AP3700A, detect voltage can directly 500mA forsystems. The the AP3700/A thresholds are 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor drive the emitter of high voltage NPN transistor. When output power falls below a given level, the IC enters AZ7023/25/27/29/31/33/42/45 respectively. Built in hysteresis mode to reduce erratic operation in the skip cycle helps to prevent power consumption. presence of noise. The AP3700/A also features under-voltage lockout, The AZ70XX series are available in 2 standard packover-current and short circuit protections. ages: TO-92 (bulk or ammo packing) and SOT-89-3. The AP3700/A is available in TO-92 package.

AP3700/A AZ70XX

Features
· · · · · · · · · Current ModeConsumption:Skip Cycle Capability Low Current Control with ICCL=300µA Typical Lower Operating Current: 0.45mA ICCH=30µA Typical Fixed Switching Frequency: 60 kHz Low Minimum Operating EMI: ±2.5kHz Frequency Dithering for Low Voltage for Output Resetting: 0.8V Typical Under-Voltage Lockout Protection Built in Hysteresis Voltage: 50mV Typical Over-Current Protection Open Collector Output Internal Short Circuit Protection Extended Temperature Range: Terminal Higher Output Voltage at OUT -40 to 85oC Low Total Cost Solution

Applications Applications
· · · · · · · Low Battery Voltage Detector Power Chargers BatteryFail Indicator Processor Reset Generator Off-Line Power Supplies Battery Backup Control Home Electric Appliances

TO-92 TO-92

TO-92 Ammo Packing

SOT-89-3

TO-92 Ammo packing

Figure 1. Package Types of AZ70XX Figure 1. Package Types of AP3700/A

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Pin Configuration General Description Features
AP3700/A AZ70XX

The AZ70XX series ICs are under voltage detectors · Low Current Consumption: with a built in voltage threshold and low power conICCL=300µA Typical Package sumption. The AZ70XX are specifically designedZto ICCH=30µA Typical accurately monitor power supplies. (TO-92) Low Minimum Operating Voltage for Output · Resetting: 0.8V Typical The AZ70XX use a precision on-chip voltage refer· Built in Hysteresis Voltage: 50mV Typical ence and a comparator to measure the input operating · Open voltage. These ICs can accurately reset the system after 3 OUT Collector Output o detecting voltage at the time of switching power on and · Extended Temperature Range: -40 to 85 C instantaneous power off in various CPU systems and 2 GND other logic systems. The detect voltage thresholds are Applications 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor 1 VCC AZ7023/25/27/29/31/33/42/45 respectively. Built in · Low Battery Voltage Detector hysteresis helps to prevent erratic operation in the pres· Power Fail Indicator ence of noise. · Processor Reset Generator The AZ70XX series are available in 2 2. Pin Configuration of AP3700/A (Top View) Figure standard pack- · Battery Backup Control · Home Electric Appliances ages: TO-92 (bulk or ammo packing) and SOT-89-3.

Pin Description
Pin Number TO-92 1 2 3 Pin Name VCC GND OUT Function The power supply of the IC, and is generally connected to opto-coupler's emitter Supply ground The output pin, connected to the emitter of NPN transistor or the source of MOSFET

TO-92

TO-92 Ammo Packing

SOT-89-3

Figure 1. Package Types of AZ70XX

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 2

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Functional Block Diagram General Description Features
Low Current Consumption: ICCL=300µA Typical ICCH=30µA Typical 3 OUT Low Minimum Operating Voltage for Output Resetting: 0.8V Typical SHORT CIRCUIT Built in COMPARATOR Voltage: 50mV Typical Hysteresis _ VREF Open Collector Output + Extended Temperature Range: -40 to 85oC

AP3700/A AZ70XX

The AZ70XX series ICs are under voltage detectors · with a built in voltage threshold and low power consumption. The AZ70XX are specifically designed to 1 accurately monitor power supplies. REGULATOR · VCC
UVLO

The AZ70XX use a precision on-chip voltage referCOMPARATOR · VREF _ ence and a comparator to measure the input operating voltage. These ICs can accurately reset the system after · + detecting voltage at the time of switching power on and · instantaneous power off in various SLOPE RAMP CPU systems and OSCILLATOR other logic systems. The detect voltage thresholds are Applications 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor PWM CLAMP COMPARATOR AZ7023/25/27/29/31/33/42/45 respectively. Built in · Low Battery DRIVER Detector COMPARATOR Voltage + PWM hysteresis helps to prevent erratic operation in the presCONTROL · Power Fail Indicator + + ence of noise. _ BANDGAP _ · Processor Reset Generator & VREF BIAS The AZ70XX series are available in 2 standard pack- · Battery Backup Control · Home Electric Appliances ages: TO-92 (bulk or ammo packing) and SOT-89-3.
GND
2

Figure 3. Functional Block Diagram of AP3700/A

TO-92

TO-92 Ammo Packing

SOT-89-3

Figure 1. Package Types of AZ70XX

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 3

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Ordering Information General Description
AP3700 The AZ70XX series ICs are under voltage detectors with a built in voltage threshold and low power consumption. The AZ70XX are specifically designed to accurately monitor power supplies. Circuit Type

AP3700/A AZ70XX

Features
· - Low Current Consumption: ICCL=300µA Typical ICCH=30µA Typical E1: Lead Free · Low Minimum Operating Voltage for Output Resetting: 0.8V Typical TR: Ammo Blank: Tube · Built in Hysteresis Voltage: 50mV Typical · Open Collector Output Package · Extended Temperature Range: -40 to 85oC Z: TO-92

The AZ70XX use a precision on-chip voltage reference and a comparator to measure the input operating Blank: AP3700 voltage. These ICs can accurately reset the system after A: AP3700A detecting voltage at the time of switching power on and instantaneous power off in various CPU systems and other logic systems. The detect voltage thresholds are Applications 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor Package Switching Frequency Temperature Range Part Number Marking ID AZ7023/25/27/29/31/33/42/45 respectively. Built in · Low Battery Voltage Detector AP3700Z-E1 3700Z-E1 hysteresis helps to prevent erratic operation in the pres· Power Fail Indicator AP3700ZTR-E1 3700Z-E1 ence of noise. TO-92 60kHz -40 to 85oC · Processor Reset Generator AP3700AZ-E1 3700AZ-E1 The AZ70XX series are available in 2 standard pack- · Battery Backup Control AP3700AZTR-E1 3700AZ-E1 · Home Electric Appliances ages: TO-92 (bulk or ammo packing) and SOT-89-3.

Packing Type Bulk Ammo Bulk Ammo

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.

Absolute Maximum Ratings (Note 1)
Parameter Supply Voltage Voltage at OUT (Note 2) Output Current at OUT Power Dissipation Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10s) Value -0.3 to 6.0 -0.3 to 40 Internally limited 0.6 150 -65 to 150 Unit V V A W
o o

C C

TO-92

TO-92 Ammo Packing

300 200

SOT-89-3

oC

ESD (Machine Model)

V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods Figure 1. Package Types of AZ70XX may affect device reliability. Note 2: The Breadown Voltage. The actual operating voltage can not be greater than the value listed here.

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 4

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Electrical Characteristics General Description
=25oC,

AP3700/A AZ70XX

Features
Low Current Consumption: Min Typ Max Unit ICCL=300µA Typical ICCH=30µA Typical Low Minimum Operating Voltage for Output 5.00 5.25 5.50 V Resetting: 0.8V Typical 3.4 3.65 3.9 V Built in Hysteresis Voltage: 50mV Typical Open Collector Output 0.22 0.4 Extended Temperature Range: -40 to 85oC mA
0.45 0.7 V k 6 6.3 18

(VCC=4V, TJ unless otherwise specified.) The AZ70XX series ICs are under voltage detectors · Parameter Symbol Conditions with a built in voltage threshold and low power consumption. The AZ70XX are specifically designed to UVLO SECTION accurately monitor power supplies. VTH (ST) · Start-up Voltage The AZ70XX useVoltage Minimal Operating a precision on-chip voltage referVOPR(min) ence and a comparator SECTION the input operating to measure STANDBY CURRENT voltage. These ICs can accurately reset the system after Start-up Current (Note 3) IST detecting voltage at the time of switching VCC=4V and power on Operating Current ICC(OPR) instantaneous power off in various CPU systems and otherZener Voltage The detect V voltage thresholds are ICC=10mA VCC logic systems. Z 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor Dynamic Impedance RVCC VCC=3.8 to 4.8V AZ7023/25/27/29/31/33/42/45 respectively. Built in INTERNAL OSCILLATOR hysteresis helps to prevent erratic operation in the presence of noise. Switching Frequency FSW The AZ70XX series are available in 2 standard packTemperature (bulk or ages: TO-92Stability ammo packing) and SOT-89-3.
DRIVE OUTPUT SECTION OUT Start-up Voltage Short Circuit Threashold Voltage (Note 4) Rise Time Fall Time Maximum Duty Cycle Minimum Duty Cycle Driver OUT On-Resistance Switch Off Current (OUT) Effective Current Limit OUT Current Coefficient ILIM GA ROUT VST VSC TR TF DMAX CL=1nF, 15 pull-up CL=1nF, 15 pull-up VOPR(min) + 0.2V VCC=VTH (ST)-0.2V IOUT=0.06A Driver off, VCC = VOPR+0.1V Frequency Dither

· · ·

Applications
· · · · ·

Low Battery Voltage Detector Power Fail Indicator 50 60 Processor Reset Generator ±2 Battery Backup Control ±2.5 Home Electric Appliances5
8.5 6 60 30 67 75 3 3 20 For AP3700 For AP3700A 460 500 -0.3

75

kHz kHz %

±3
8

11

V V

ns 84

%

40

µA mA A/V

Note 3: AP3700/A is an emitter drive controller, the PWM controller will start up only when the voltage on the OUT pin rises up to its threshould value. TO-92 SOT-89-3 TO-92 Ammo Packing Note 4: AP3700/A performs its short circuit function by shutdown the OUT pulse when the OUT pin voltage drops below its short circuit threshold value.

Figure 1. Package Types of AZ70XX

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 5

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Typical Performance Characteristics General Description
The AZ70XX series ICs are under voltage detectors with500 built in voltage threshold and low power cona sumption. The AZ70XX are specifically designed to accurately monitor power supplies.
Operating Current (µA)

AP3700/A AZ70XX

Features
· Low Current Consumption: Typical ICCH=30µA Typical Low Minimum Operating Voltage for Output 280 Resetting: 0.8V Typical Built in Hysteresis Voltage: 50mV Typical 260 Open Collector Output Extended Temperature Range: -40 to 85oC 240
ICCL 300 =300µA

· · · ·
Start-up Current (µA)

The 450 AZ70XX use a precision on-chip voltage reference and a comparator to measure the input operating voltage. These ICs can accurately reset the system after detecting voltage at the time of switching power on and 400 instantaneous power off in various CPU systems and other logic systems. The detect voltage thresholds are 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor AZ7023/25/27/29/31/33/42/45 respectively. Built in 350 hysteresis helps to prevent erratic operation in the pres-40 -25 -10 5 20 35 50 65 80 95 110 125 ence of noise. Ambient Temperature ( C)
o

Applications 220
· · · · ·
200 -40 Fail Indicator Power-25 -10 5 20

Low Battery Voltage Detector
35 50 65
o

80

95 110 125

The AZ70XX series are available in 2 standard packages: TO-92 (bulk or Currentpacking) and SOT-89-3. Figure 4. Operating ammo vs. Ambient Temperature

Figure 5. Start-up Current vs. Ambient Temperature

Processor Reset Generator Battery Backup Control Home Electric Appliances

Ambient Temperature ( C)

65

500

Switching Frequency (KHz)

60

Start-up Current (µA)

High Side frequency for dither

400

300

200

55

Low Side frequency for dither

100

50 -40 -25 -10

5

20

35 50 65 TO-92
o

80

95 110 125 TO-92

1 Ammo Packing

0

2

3 SOT-89-3 VCC Voltage (V)

4

5

Ambient Temperature ( C)

Figure 6. Switching Frequency vs. Ambient Temperature Figure 7. Start-up Current vs. VCC Voltage Figure 1. Package Types of AZ70XX

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 6

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Function Description General Description
1. Startup Circuit The AZ70XX series ICs are under voltage detectors Figure 3 is the functional block diagram of AP3700/A, with a built in voltage threshold and low power conand there are 3 external pins: the VCC pin, the OUT sumption. The AZ70XX are specifically designed to pin and GND pin. In typical application shown by accurately monitor power supplies. Figure 10, the VCC pin is used for both bias supply and feedback control. The OUT pin directly drives The AZ70XX use a precision on-chip voltage referexternal NPN transistor or MOSFET, and also ence and a comparator to measure the input operating provides initial bias power for UVLO comparator. voltage. These ICs can accurately reset the system after When the IC works in PWM mode, the auxiliary detecting voltage at the time of switching power on and winding will supply the VCC enough operating instantaneous power off in various CPU systems and current. other logic systems. The detect voltage thresholds are 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor Figure 8 shows the start-up sequence of the Built in AZ7023/25/27/29/31/33/42/45 respectively. VCC and the VOUT hysteresis. helps to prevent erratic operation in the presence of noise. The AZ70XX series are available in 2 standard packages: TO-92 (bulk or ammo packing) and SOT-89-3.
CH1: VCC

AP3700/A AZ70XX

Features
· Low Current Consumption: ICCL=300µA Typical ICCH=30µA Typical Low Minimum Operating Voltage for Output Resetting: 0.8V Typical Built in Hysteresis Voltage: 50mV Typical Open Collector Output Extended Temperature Range: -40 to 85oC

· · · ·

Applications
· · · · · Low Battery Voltage Detector Power Fail Indicator Processor Reset Generator Figure 9. Frequency Dither Influences Battery Backup Swithcing Cycle Control the Home Electric Appliances

AP3700/A has reference switching frequency of 60 kHz, and its frequency deviation is ±2.5kHz in period of 2ms. Figure 9 shows the frequency dither influence to the waveform . 4. Current Limit Control The AP3700/A employs current mode control to improve transient response and voltage stability. In Figure 10, the external inductor current through the OUT pin is converted to a voltage by an internal resistor, and this voltage will participate to control duty cycle and peak inductor current.

CH2: OUT

Figure 8. Start-up Sequence of VCC and VOUT

2. VCC/Feedback Control An opto-coupler and secondary constant voltage/ current controller consists of voltage feedback network. When load is heavy, the voltage on VCC will be lower to enlarge duty cycle; on the contrary, if load drops, the voltage on VCC will rise to reduce duty Ammo Packing TO-92 TO-92 cycle. 3. Frequency Dither Frequency dither is performed by periodically spreading a single switching frequency into adjacent Figure 1. Package Types of AZ70XX frequency band, so the peak energy is spread. This technique can improve EMI by reducing both quasipeak and average EMI emissions.

SOT-89-3

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 7

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Typical Application General Description
The AZ70XX series ICs are under voltage detectors R1 with a 10/1W in voltage threshold and low power conbuilt Bridge D1-D4 1N4007*4 sumption. The AZ70XX are specificallyR4 designed to L1 R2 330µ accurately monitor power supplies. 1.5M 100k
J1 AC 85-264V

AP3700/A AZ70XX

Features
· Low Current Consumption: ICCL=300µA Typical D9 T1 C9 C11 ICCH=30µA Typical L2 5V/1A SB240 EE16 5.5µ 470µ 470µ · Low Minimum Operating Voltage for Output + + Resetting: 0.8V Typical R13 Rs 6.2k · Built in Hysteresis Voltage: 50mV Typical 0.2 · Open Collector Output C10 · D7 Extended Temperature Range: -40 to 85oC 47µ
1N4148 R15 2k D8 Applications R5 1N4148 4.7 +

VO+

The AZ70XX use a precision on-chip voltage refer2200p ence and a comparator to measure the input operating voltage. These ICs can accurately reset the system after D5 detecting voltage at the time of switching powerFR107 on and instantaneous power off in various CPU systems and other logic systems. The detect voltage thresholds are 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor AZ7023/25/27/29/31/33/42/45 respectively. Built in Q1 hysteresis helps to prevent erratic operation in the presAPT13003 ence of noise.
D6 1N4148

+ C1 4.7µ

C2 4.7µ

+

C3

VO-

The AZ70XX series are available in 2 standard packages: TO-92 (bulk or ammo packing) and SOT-89-3.
R6 390 3

· Low Battery Voltage DetectorC8 R9 0.1µ · Power Fail Indicator 100k R8 U3 · PC817 200 Processor Reset Generator · Battery Backup Control C7 · Home Electric Appliances 2.2n
R7 510 1 + C5 10µ C6 3.3n R12 100 4 3

OUT
+ C4 10µ

Vcc VOUT

R10 22k 1

VCTRL

VCC GND
2

6

VCC ICTRL

VSENSE GND

5 R11 510 2

U1 AP3700

U2 AP4313

Figure 10. 5V/1A Output for Battery Charger of Mobile Phone

TO-92

TO-92 Ammo Packing

SOT-89-3

Figure 1. Package Types of AZ70XX

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 8

BCD Semiconductor Manufacturing Limited

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Mechanical Dimensions General Description Features
AP3700/A AZ70XX

The AZ70XX series ICs are under voltage detectors · with a built in voltage threshold and low power TO-92 consumption. The AZ70XX are specifically designed to accurately monitor power supplies. ·

Low Current Consumption: Unit: mm(inch) ICCL=300µA Typical ICCH=30µA Typical Low Minimum Operating Voltage for Output Resetting: 0.8V Typical The AZ70XX use a precision on-chip voltage refer· Built in Hysteresis Voltage: 50mV Typical 1.100(0.043) ence and a comparator to measure the input operating voltage. These ICs can accurately reset the system after · Open Collector Output 3.430(0.135) 1.400(0.055) o detecting voltage at the time of switching power on and · Extended Temperature Range: -40 to 85 C MIN instantaneous power off in various CPU systems and other logic systems. The detect voltage thresholds are Applications 0.360(0.014) 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor 0.510(0.020) AZ7023/25/27/29/31/33/42/45 respectively. Built in · Low Battery Voltage Detector hysteresis helps to prevent erratic operation in the pres· Power Fail Indicator ence of noise. 0.000(0.000) · Processor Reset Generator · Battery Backup Control 0.380(0.015) The AZ70XX series are available in 2 standard pack· 1.600(0.063) Home Electric Appliances ages: TO-92 (bulk or ammo packing) and SOT-89-3.
3.300(0.130) 3.700(0.146) MAX 4.400(0.173) 4.700(0.185)

4.300(0.169)

4.700(0.185)

0.380(0.015) 0.550(0.022)

TO-92

14.100(0.555) 14.500(0.571)

TO-92 Ammo Packing

SOT-89-3

1.270(0.050) TYP

2.440(0.096)

2.640(0.104) Figure 1. Package Types of AZ70XX

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 9

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Data Sheet VOLTAGE DETECTOR LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Mechanical Dimensions General Description Features
AP3700/A AZ70XX

The AZ70XX series ICs are under voltage detectors · Low Current Consumption: TO-92 Ammo Unit: mm(inch) with a built in voltage threshold and low power con- Packing µA Typical ICCL=300 sumption. The AZ70XX are specifically designed to ICCH=30µA Typical accurately monitor power supplies. · Low Minimum Operating Voltage for Output Resetting: 0.8V Typical The AZ70XX use a precision on-chip voltage refer· Built in Hysteresis Voltage: 50mV Typical 12.400(0.488) ±1.000(0.039) ence and a comparator to measure the input operating ±1.000(0.039) 13.000(0.512) voltage. These ICs can accurately reset the system after · Open Collector Output 4.400(0.173) o h Temperature detecting voltage at the time of switching power on and · Extended 4.600(0.181) Range: -40 to 85 C P 3.400(0.134) instantaneous power off in various CPU systems and 3.600(0.142) other logic systems. The detect voltage thresholds are Applications 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor 4.400(0.173) AZ7023/25/27/29/31/33/42/45 respectively. Built in · Low Battery Voltage Detector 4.600(0.181) hysteresis helps to prevent erratic operation in the pres· Power Fail Indicator ence of noise. · Processor Reset Generator 19.000(0.748) The AZ70XX series are available in 2 standard pack- · Battery Backup Control 21.000(0.827) · Home Electric Appliances ages: TO-92 (bulk or ammo packing) and SOT-89-3. 0.380(0.015)
0.550(0.022) 1.000 (0.039) MAX 5.500(0.217) 6.500(0.256) 6.050(0.238) 6.650(0.262) 2.200(0.087) 2.800(0.110) 2.200(0.087) 2.800(0.110)

15.500(0.610) 16.500(0.650)

2.500(0.098) MIN

8.500(0.335) 9.500(0.374)

3.550(0.140) 4.150(0.163)

3.800(0.150) 4.200(0.165) 17.500(0.689) 19.000(0.748)

12.500(0.492) 12.900(0.508)

TO-92

TO-92 Ammo Packing

SOT-89-3

0.150(0.006) 0.250(0.010)
Figure 1. Package Types of AZ70XX

0.350(0.014) 0.450(0.018)

May 2007 Rev. 1. 6 Jun. 2007 Rev. 1. 3 1 10

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BCD Semiconductor Manufacturing Limited

http://www.bcdsemi.com

IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.
MAIN SITE BCD Semiconductor Manufacturing Limited
- Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008

BCD Semiconductor Manufacturing Limited
- IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673

REGIONAL SALES OFFICE
Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788

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Exhibit B

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

General Description
The AP3700E is a green-mode pulse width modulation (PWM) controller. It is specially designed for low power applications such as off-line battery chargers, where the needs for low standby power, space saving and low cost are all required. In a battery charger rated 5V/0.8A, the maximum standby power is only 0.18Watt. In normal operation, the AP3700E switches on and off at a fixed switching frequency of 60 kHz. With a current limit capability of 460mA, the AP3700E can directly drive the emitter of high voltage NPN transistor. When output power falls below a given level, the IC enters skip cycle mode to reduce power consumption. The AP3700E also features under-voltage lockout, over-current and short circuit protections. The AP3700E is available in TO-92 package.

Features
· · · · · · · · · Current Mode Control with Skip Cycle Capability Lower Operating Current: 0.45mA Fixed Switching Frequency: 60 kHz Frequency Dithering for Low EMI: ±2.5kHz Under-Voltage Lockout Protection Over-Current Protection Internal Short Circuit Protection Higher Output Voltage at OUT Terminal Low Total Cost Solution

Applications
· · Battery Chargers Off-Line Power Supplies

TO-92 (Buck Packing)

TO-92 (Ammo Packing)

Figure 1. Package Types of AP3700E

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Pin Configuration

Z Package (TO-92)

3 2 1

OUT GND VCC

Figure 2. Pin Configuration of AP3700E (Top View)

Pin Description
Pin Number 1 2 3 Pin Name VCC GND OUT Supply ground The output pin, connected to the emitter of NPN transistor or the source of MOSFET Function The power supply of the IC, and is generally connected to opto-coupler's emitter

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Functional Block Diagram

VCC

1
UVLO COMPARATOR VREF

REGULATOR

3
SHORT CIRCUIT COMPARATOR

OUT

_ +
SLOPE RAMP OSCILLATOR

_ +

VREF

CLAMP COMPARATOR

+ _

+ +
BANDGAP & VREF BIAS

PWM COMPARATOR PWM CONTROL

DRIVER

_

GND
2

Figure 3. Functional Block Diagram of AP3700E

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Ordering Information
AP3700 -

E1: Lead Free Circuit Type TR: Ammo Blank: Tube E: AP3700E Package Z: TO-92

Package TO-92

Switching Frequency 60kHz

Temperature Range -40 to 85oC

Part Number AP3700EZ-E1 AP3700EZTR-E1

Marking ID 3700EZ-E1 3700EZ-E1

Packing Type Bulk Ammo

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.

Absolute Maximum Ratings (Note 1)
Parameter Supply Voltage Voltage at OUT (Note 2) Output Current at OUT Power Dissipation Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10s) ESD (Machine Model) Value -0.3 to 6.0 -0.3 to 40 Internally limited 0.6 150 -65 to 150 300 200 Unit V V A W
o o

C C

oC

V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: The Breadown Voltage. The actual operating voltage can not be greater than the value listed here.

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Electrical Characteristics
(VCC=4.5V, TJ=25oC, unless otherwise specified.)
Parameter UVLO SECTION Start-up Voltage Minimal Operating Voltage VTH (ST) VOPR(min) IST ICC(OPR) VZ RVCC fSW 85o ICC=10mA VCC=3.8 to 4.8V 50 6 VCC=4.5V 5.5 3.6 5.75 3.8 5.95 4.0 V V Symbol Conditions Min Typ Max Unit

STANDBY CURRENT SECTION Start-up Current (Note 3) Operating Current VCC Zener Voltage Dynamic Impedance INTERNAL OSCILLATOR Switching Frequency Frequency dithering Temperature Stability DRIVE OUTPUT SECTION OUT Turn-on Voltage OUT Turn-off Voltage Rise Time Fall Time Maximum Duty Cycle Minimum Duty Cycle Driver OUT On-Resistance Switch Off Current (OUT) Effective Current Limit OUT Current Coefficient ILIM GA ROUT IOUT=0.06A Driver off, VOUT=10V VCC = VOPR+0.1V 460 -0.3 VOUT(ON) VOUT(OFF) TR TF DMAX CL=1nF, 15 pull-up CL=1nF, 15 pull-up VOPR(min) + 0.2V 67 5 9.5 5.5 60 30 75 3 3 20 40 µA mA A/V 84 % 12 6.5 V V ns -40 to C 60 75 kHz kHz % 0.22 0.45 6.3 18 0.45 0.7 V k mA

±2

±2.5
5

±3
10

Note 3: AP3700E is an emitter drive controller, the PWM controller will start up only when the voltage on the OUT pin rises up to its threshould value.

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Typical Performance Characteristics

0.60 0.58

300

280
0.56

operating current(mA)

Start-up Current (µA)
-20 0 20 40 60
o

0.54 0.52 0.50 0.48 0.46 -40 80 100 120

260

240

220

200 -40 -25 -10

5

20

35

50

65
o

80

95 110 125

Ambient Temperature ( C)

Ambient Temperature ( C)

Figure 4. Operating Current vs. Ambient Temperature

Figure 5. Start-up Current vs. Ambient Temperature

70 69 68 67 65 64 63 62 61 60 59 58 57 56 55 -40

500

Switching Frequency (kHZ)

400 Start-up Current (µA)

66

300

200

100

0
-20 0 20 40 60
o

80

100

120

1

2

3 VCC Voltage (V)

4

5

Ambient Temperature ( C)

Figure 6. Switching Frequency vs. Ambient Temperature

Figure 7. Start-up Current vs. VCC Voltage

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Typical Performance Characteristics (Continued)

540 520 500 480 460 440 420 400 -40

Current limit(mA)

-20

0

20

40

60
o

80

100

120

Ambient Temperature ( C)

Figure 8. Current Limit vs. Ambient Temperature

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Function Description
1. Startup Circuit Figure 3 is the functional block diagram of AP3700E, and there are 3 external pins: the VCC pin, the OUT pin and GND pin. In typical application shown by Figure 10, the VCC pin is used for both bias supply and feedback control. The OUT pin directly drives external NPN transistor or MOSFET, and also provides initial bias power for UVLO comparator. When the IC works in PWM mode, the auxiliary winding will supply the VCC enough operating current. Figure 9 shows the start-up sequence of the VCC and the VOUT.
Figure 10. Frequency Dithering Influences the Swithcing Cycle

CH1: VCC

AP3700E has reference switching frequency of 60 kHz, and its frequency deviation is ±2.5kHz in period of 2ms. Figure 10 shows the frequency dithering influence to the waveform . 4. Current Limit Control The AP3700E employs current mode control to improve transient response and voltage stability. In Figure 11, the external inductor current through the OUT pin is converted to a voltage by an internal resistor, and this voltage will participate to control duty cycle and peak inductor current.

CH2: OUT

Figure 9. Start-up Sequence of VCC and VOUT

2. VCC/Feedback Control An opto-coupler and secondary constant voltage/ current controller consists of voltage feedback network. When load is heavy, the voltage on VCC will be lower to enlarge duty cycle; on the contrary, if load drops, the voltage on VCC will rise to reduce duty cycle. 3. Frequency Dithering Frequency dithering is performed by periodically spreading a single switching frequency into adjacent frequency band, so the peak energy is spread. This technique can improve EMI by reducing both quasipeak and average EMI emissions.

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Typical Application
R1 10/1W

Bridge D1-D4 1N4007*4

L1 330µ C2 4.7µ +

R2 R4 1.5M 100k

T1 EE16

C9 470µ + D9 APD240

L2 5.5µ

C11 470µ +

5V/0.8A

J1 AC 85-264V

+ C1 4.7µ

C3 2200p

Rs 0.25

R13 6.2k

D5 FR107

D7 1N4148 R5 4.7 D8 1N4148

C10 47µ +

R15 2k

Z1 12V R9 100k C8 0.1µ

Q1 APT13003
D6 1N4148

U3 PC817

R8 200 C7 2.2n

R6 200

3

OUT
+ C4 10µ

R7 200 1 C5 0.47µ C6 6.8n R12 100

3

Vcc VOUT

R10 22k 1

VCTRL

VCC GND
2

6

VCC ICTRL

VSENSE GND

5 R11 510

4

2

U1 AP3700E

U2 AP4313

Figure 11. 5V/0.8A Output for Battery Charger of Mobile Phone

Dec. 2007 Rev. 1. 0 9

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Mechanical Dimensions TO-92 (Bulk Packing) Unit: mm(inch)

1.100(0.043) 1.400(0.055) 3.430(0.135) MIN 0.360(0.014) 0.510(0.020)

3.300(0.130)

3.700(0.146)

0.000(0.000) 0.380(0.015) 1.600(0.063) MAX 4.400(0.173) 4.700(0.185)

4.300(0.169)

4.700(0.185)

0.380(0.015) 0.550(0.022)

1.270(0.050) TYP

2.440(0.096) 2.640(0.104)

Dec. 2007 Rev. 1. 0 10

14.100(0.555) 14.500(0.571)

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Preliminary Datasheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E

Mechanical Dimensions TO-92 (Ammo Packing) Unit: mm(inch)

4.400(0.173) 4.700(0.185)

4.300(0.169)

1.100(0.043) 1.400(0.055) 3.430(0.135) MIN 0.360(0.014) 0.510(0.020)

4.700(0.185)

1.270(0.050) Typ

3.300(0.130)

3.700(0.146)

4.500(0.177) 5.500(0.217)

13.000(0.512)

0.000(0.000) 0.380(0.015)
1.600(0.063)

MAX

14.000(0.551)

0.380(0.015) 0.550(0.022)

2.540(0.100) Typ

Dec. 2007 Rev. 1. 0 11

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BCD Semiconductor Manufacturing Limited

http://www.bcdsemi.com

IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.
MAIN SITE BCD Semiconductor Manufacturing Limited
- Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008

BCD Semiconductor Manufacturing Limited
- IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673

REGIONAL SALES OFFICE
Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788

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Exhibit C

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER General Description
The AP3710 is a green-mode PWM controller, its main applications are low power supplies such as offline battery chargers, adapters, STB and other auxiliary supplies, where the needs for low no load power, low total cost and high reliability are all required. The functional blocks of AP3710 include: under voltage lockout with low start-up current; precise voltage reference for internal comparators; PWM comparator with current limit control, feedback signal and bandgap input; short circuit comparator and open circuit protection for opto-coupler. The AP3710 operates at a fixed 60kHz switching frequency, its output connects to the emitter of high voltage NPN transistor or the source of MOSFET. In normal mode, it works as a switch to turn on or turn off the external transistor. In failure modes like open loop, over voltage or overload due to short circuit, the chip enters into an auto restart mode controlled by the internal protection unit. The AP3710 is available in SOIC-8 package.

AP3710

Features
· · · · · · · · · · · · · Current Mode Control with Skip Cycle Capability Low Start-up Current: 0.25 mA Low Operating Current: 0.45mA Output Current Capacity: 900 mA Fixed Switching Frequency: 60 kHz Frequency Dithering for Low EMI Under-Voltage Lockout with Hysteresis Built-in Slope Compensation Short Circuit Protection Open and Short Circuit Protection for OptoCoupler Maximum Input Power is 0.2W under No Load Maximum Input Power is 1W under 0.5W Load Low Total Cost Solution

Applications
· · · · · Adapters Battery Chargers Set Top Boxes Auxiliary Supplies DVD

SOIC-8

Figure 1. Package Type of AP3710

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Pin Configuration
M Package (SOIC-8)
GND VCC NC OUT 1 2 3 4 8 7 6 5 NC VA NC VSEN

AP3710

Figure 2. Pin Configuration of AP3710 (Top View)

Pin Description
Pin Number 1 2 3, 6, 8 4 5 7 Pin Name GND VCC NC OUT VSEN VA Power supply ground The power supply of the IC and this terminal is also used for the feedback control Not connected The PWM output is directly connected to the emitter of NPN transistor or the source of MOSFET It is used for line voltage compensation, and PWM uses this to terminate the output switch conduction It is used for short circuit protection, and this terminal will be pulled down to low level when short circuit happens at the load side Function

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Functional Block Diagram AP3710

VCC

2
UVLO COMPARATOR VREF (1.2V) BIAS

START-UP CURRENT SOURCE

4

OUT

OSCILLATOR

+
PWM COMPARATOR FB

5

VSEN
VREF (1.2V) DISCHARGE COMPARATOR

+ -

DRIVER PWM CONTROL

SLOP COMPENSATION DISCHARGE LOGIC

7

VA

GND

1

VREF (1.2V)

+ _

Figure 3. Functional Block Diagram of AP3710

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Ordering Information
AP3710 Circuit Type Package M: SOIC-8 E1: Lead Free TR: Tape and Reel Blank: Tube

AP3710

Package SOIC-8

Switching Frequency 60kHz

Temperature Range -40 to 85oC

Part Number AP3710M-E1 AP3710MTR-E1

Marking ID 3710M-E1 3710M-E1

Packing Type Tube Tape & Reel

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.

Absolute Maximum Ratings (Note 1)
Parameter Supply Voltage Voltage at OUT Analog Input at VSEN Output Current at OUT Power Dissipation Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10s) ESD (Machine Model) Value -0.3 to 6.3 -0.3 to 40 -0.3 to 6.3 Internally limited 0.6 150 -65 to 150 300 300 Unit V V V A W
o

C

oC o

C

V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Electrical Characteristics
(VCC=4V, TJ=25oC, unless otherwise specified.)
Parameter UVLO SECTION Turn on Threshold Voltage Turn off Threshold Voltage Discharge Voltage VCC (on) VCC (off) VDIS 5.30 3.4 2.7 5.60 3.65 2.9 5.90 3.90 3.1 V V V Symbol Conditions Min Typ Max Unit

AP3710

STANDBY CURRENT SECTION Start-up Current Operating Current VCC Zener Voltage Dynamic Impedance INTERNAL OSCILLATOR Switching Frequency Frequency Dithering Temperature Stability DRIVE OUTPUT SECTION OUT Turn-on Voltage OUT Turn-off Voltage Rise Time Fall Time Maximum Duty Cycle Minimum Duty Cycle Driver OUT On-Resistance Switch Off Current (OUT) Effective Current Limit OUT Current Coefficient CURRENT SECTION Maximum Input Signal VSEN 0.9 1.0 1.1 V ILIM GA ROUT VOUT(on) VOUT(off) TR TF DMAX CL=1nF, 15 pull-up CL=1nF, 15 pull-up VCC(off) + 0.2V VCC=VCC (on)-0.2V IOUT=0.7A Driver off, VOUT=10V VCC=VCC(off)+0.5V 800 68 7.6 5.7 9.3 6.8 60 30 75 3 3 20 900 -0.6 82 5 5 40 µA mA A/V % 11 7.9 V V ns -40 to 85oC FSW 50 60 70 kHz kHz % IST ICC(opr) VZ RVCC ICC=10mA VCC=3.8 to 4.8V 6.5 10 VCC=4V 0.25 0.45 7 18 0.4 0.7 7.5 30 V k mA

±2

±3.5
5

±5

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Electrical Characteristics (Continued)
1N5819

AP3710

R 100/3W +

L 70µH C1 100µF/50V 27V Zener

+

C2 100µF/50V + _ VIN =10V

OUT AP3710

GND

VCC

C3 2200pF

VCC=VCC(off)+0.5V

Figure 4. The Test Circuit for Current Limit

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Typical Performance Characteristics AP3710

680 640

400 360 320

Operating Current (µA)

600

Start-up Current (µA)
-20 0 20 40 60
o

560 520 480 440 400 360 320 -40 80 100 120

280 240 200 160 120 -40 -20 0 20 40 60
o

80

100

120

Ambient Temperature ( C)

Ambient Temperature ( C)

Figure 5. Operating Current vs. Ambient Temperature

Figure 6. Start-up Current vs. Ambient Temperature

500

70 68

400 Start-up Current (µA)
Switching Frequency (KHz)
66 64 62 60 58 56

300

200

100

0

1

2

3 VCC Voltage (V)

4

5

-40

-20

0

20

40

60
o

80

100

120

Ambient Temperature ( C)

Figure 7. Start-up Current vs. VCC Voltage

Figure 8. Switching Frequency vs. Ambient Temperature

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Typical Performance Characteristics (Continued) AP3710

1.10

3.10 3.05 3.00

1.05

Normalized Current Limit

1.00

Discharge Voltage (V)
-20 0 20 40 60
o

2.95 2.90 2.85 2.80 2.75

0.95

0.90

0.85

0.80 -40

80

100

120

2.70 -40

-20

0

20

40

60
o

80

100

120

Ambient Temperature ( C)

Ambient Temperature ( C)

Figure 9. Normalized Current Limit vs. Ambient Temperature

Figure 10. Discharge Voltage vs. Ambient Temperature

4.0 3.8

5.5

Turn on Threshold Voltage (V)

3.6 3.4

5.4

On Resistance ()

3.2 3.0 2.8 2.6 2.4 2.2 2.0 -40

5.3

5.2

5.1

-20

0

20

40

60
o

80

100

120

5.0 -40

-20

0

20

40

60
o

80

100

120

Ambient Temperature ( C)

Ambient Temperature ( C)

Figure 11. On Resistance vs. Ambient Temperature

Figure 12. Turn on Voltage vs. Ambient Temperature

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Function Description
1. UVLO and Start up Circuit
The AP3710's turn on threshold voltage is 5.6V and its turn off threshold voltage is 3.65V, so the UVLO hysteresis voltage is 1.95V, which helps AP3710 to draw adequate energy to supply VCC terminal during start-up. Please see Figure 13 for UVLO chart.
D6 R2+R3 R5 Q1 APT13003 D6 R8 R6 OUT VSEN VA + VCC GND C6 + R7 C5 R13 R14 VIN Rectified AC

AP3710
VO

U3 PC817

R16

C7

ICC: Supply Current (µA)

U2 AZ431

R16

Turn off

Turn on

C4

U1 AP3710

3.65 5.6 VCC: Supply Voltage (V)

Figure 14. The Start-up Circuit of Typical Application

Figure 13. 5.6/3.65V UVLO Threshold of AP3710

The VCC terminal in Figure 3 is used for both bias supply and feedback control. When AP3710 is powered on, the start-up current source turns on and it can not turn off until VCC level increases to its threshold value and PWM pulse is produced.

In start-up section of typical application shown by Figure 14, the rectified line voltage VIN charges the capacitor C4 through start-up resistor R2+R3 until Q1 is turned on so OUT terminal can directly drive external Q1, a MOSFET inside AP3710 is connected in series with the Q1. Once the start-up is set up, the auxiliary bias winding will supply the VCC terminal enough operating current. The start-up sequence is shown in Figure 15.

Figure 15. Power up Waveforms

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Function Description (Continued)
2. VCC/Feedback Control
In Figure 14, an opto-coupler and secondary constant voltage consists of voltage feedback network. Voltage feedback loop consists of shunt regulator AZ431 and FB/VCC terminal of AP3710. When load is heavy, the voltage on VCC terminal will decrease to enlarge duty cycle; on the contrary, if load drops, the voltage on VCC will increase to reduce duty cycle.

AP3710

5. Current Limit Control
The AP3710 employs current mode control to improve transient response and voltage stability. In Figure 3, the external inductor current through the OUT pin is converted to a voltage by an internal resistor, and this voltage will participate to control duty cycle and peak inductor current.

3. Skip Cycle Mode Operation
The AP3710 enters skip cycle mode when load power drops below a given level, and this is performed by sensing the VCC voltage level, i.e., the heavier load power, the lower VCC voltage level. In normal operation, the VCC terminal indicates a peak inductance current under certain load power. If the load power decreases, VCC voltage level increases to ask for less peak current. When it reaches a determined value, the IC prevents the current from decreasing further down and starts to blank the output pulses, the IC then enters the skip cycle mode operation. Figure 16 is the sketch for the two operation mode.
Normal PWM Waveform Cycle Skip Waveform
0 t

6. Frequency Dithering
Frequency dithering is performed by periodically spreading a single switching frequency into adjacent frequency band, so the peak energy is spread. This technique can improve EMI performance by reducing both quasi peak and average EMI emissions.

Figure 16. Skip Cycle and Normal PWM Waveform Figure 17. Frequency Dither Influences the Switching Cycle

4. Slope Compensation
The AP3710 is current mode PWM controller, and it regulates peak inductance current by its current control loop. It is known that a continuous condition mode SMPS may induce noise and harmonic oscillation on current sense or feedback signal, and this is especially serious when duty cycle exceeds 50%. The internal slope compensation of AP3710 can improve power supply stability by increasing the current slope.

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Function Description (Continued)
7. Short Circuit Protection
Internal short circuit control can protect a SMPS from being damaged when short circuit at its output happens. In Figure 18, when VCC drops below its turn off threshold value, the UVLO comparator's output will control the Discharge Logic to pull VA terminal to low level, and the low level is kept before the VCC voltage drops below the threshold value of discharge comparator. Then the system will re-startup from C4 charging again and the same process will repeat indefinitely. The long start-up period makes the input power low enough to ensure the whole system in safety under output short circuit condition.
From VCC

AP3710

From UVLO

Discharge Comparator Discharge Logic
VREF 1.2V

VA

Figure 18. Short Circuit Protection Block

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Typical Application
R1

AP3710

D1-D4
L2 T1 EE16

R11 C11

L3
D8

L4

12V/1A
VO+

J1 AC 85-264V

F1

+
C1

R9

+
C2

R4

C3

+

C8

C9

+

ZD2

R2

VOD7 D5

R3

R5

R13

Q1
D6
R8

U3

R15

C7

R14

R6

OUT VSEN
VA
+
C4

R7

U2

R16

VCC GND
C6

+

C5
C10

U1

Figure 19. 12V/1A Adapter

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Bill of Materials for Figure 19
Designator R1 R2, R3 R4 R5 R6 R7 R8 R11 R13 R14 D1 to D4 D5, D6 D7 D8 Part Type Resistor, NTC Resistor, 5 Resistor, 1M, 1206 Resistor, 68k, 1206 Resistor, 3, 0805 Resistor, 200, 0805 Resistor, 2k, 0805 Resistor, 5.1M, SIP Resistor, 15 , 1206 Resistor, 1k, 0805 Resistor, 11.4k, 0805 Diode, 1N4007, DO-41 Diode, 1N4148, LL-34 Diode, FR107, DO-15 Diode, 3100, DO-201 Designator C1, C2 C3 C4, C5 C6 C7 C8 C9 C10 C11 Q1 U3 L2 L4 ZD2 T1 Part Type Electrolytic Capacitor, 10 µF/400V, 10 Capacitor, 2200pF, d=5mm Capacitor, 10µF, d=4.5mm Capacitor, 22nF, 0805 Capacitor, 0.47µF, 0805 Electrolytic Capacitor, 1000µF Electrolytic Capacitor, 220µF Y Capacitor, 2200pF Capacitor, 1nF, 0805 Transistor, APT13003, TO126 Opto-coupler, PC817, DIP-4 Inductor, 300µH/0.3A Inductor, 100µH/1A Zener, 13V/1W Transformer, EE-20

AP3710

R9, R15, R16 Resistor, 3k, 0805

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Preliminary Datasheet LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER Mechanical Dimensions SOIC-8 Unit: mm(inch) AP3710

4.700(0.185) 5.100(0.201) 7°

1.350(0.053) 1.750(0.069)

0.320(0.013)

8°

7°

8°

0.675(0.027) 0.725(0.029)

D

5.800(0.228) 6.200(0.244)
D 20:1

1.270(0.050) TYP

0.100(0.004) 0.300(0.012) R0.150(0.006)

0.800(0.031)
0.200(0.008)

1.000(0.039) 3.800(0.150) 4.000(0.157)

0° 8°

0.330(0.013) 0.510(0.020)

0.190(0.007) 0.250(0.010) 0.900(0.035)

1° 5°
R0.150(0.006)

0.450(0.017) 0.800(0.031)

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BCD Semiconductor Manufacturing Limited

http://www.bcdsemi.com

IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.
MAIN SITE BCD Semiconductor Manufacturing Limited
- Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008

BCD Semiconductor Manufacturing Limited
- IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673

REGIONAL SALES OFFICE
Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788

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Exhibit D

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REDACTED IN ITS ENTIRETY