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| Data Sheet 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 May 2008 Rev. 1. 1 1 BCD Semiconductor Manufacturing Limited Data Sheet 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 May 2008 Rev. 1. 1 2 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E Functional Block Diagram VCC 1 VREF REGULATOR UVLO COMPARATOR 3 SHORT CIRCUIT COMPARATOR OUT _ + _ + TIMER OSCILLATOR VREF CLAMP COMPARATOR SLOPE COMPENSATION + _ + + BANDGAP & VREF BIAS DRIVER PWM CONTROL _ PWM COMPARATOR GND 2 Figure 3. Functional Block Diagram of AP3700E May 2008 Rev. 1. 1 3 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E Ordering Information AP3700 E1: Lead Free G1: Green TR: Ammo Blank: Tube Package Z: TO-92 Packing Type Bulk Ammo Circuit Type E: AP3700E Package Switching Frequency 60kHz Temperature Range -40 to 85oC Part Number Lead Free AP3700EZ-E1 AP3700EZTR-E1 Green AP3700EZ-G1 AP3700EZTR-G1 Marking ID Lead Free 3700EZ-E1 3700EZ-E1 Green 3700EZ-G1 3700EZ-G1 TO-92 BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages. 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. May 2008 Rev. 1. 1 4 BCD Semiconductor Manufacturing Limited Data Sheet 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 A 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. May 2008 Rev. 1. 1 5 BCD Semiconductor Manufacturing Limited Data Sheet 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 (A) -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 (A) 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 May 2008 Rev. 1. 1 6 BCD Semiconductor Manufacturing Limited Data Sheet 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 May 2008 Rev. 1. 1 7 BCD Semiconductor Manufacturing Limited Data Sheet 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. May 2008 Rev. 1. 1 8 BCD Semiconductor Manufacturing Limited Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E Typical Application R1 10/1W Bridge D1-D4 1N4007*4 L1 330 C2 4.7 + R2 R4 1.5M 100k T1 EE16 C9 470 + D9 APD240 L2 5.5 C11 470 + 5V/0.8A J1 AC 85-264V + C1 4.7 C3 2200p Rs 0.25 R13 6.2k D5 FR107 D7 1N4148 R5 4.7 D8 1N4148 C10 47 + R15 2k Z1 12V R9 100k C8 0.1 Q1 APT13003 D6 1N4148 U3 PC817 R8 200 C7 2.2n R6 200 3 OUT + C4 10 R7 200 1 C5 0.47 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 May 2008 Rev. 1. 1 9 BCD Semiconductor Manufacturing Limited Data Sheet 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) May 2008 Rev. 1. 1 10 14.100(0.555) 14.500(0.571) BCD Semiconductor Manufacturing Limited Data Sheet 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 May 2008 Rev. 1. 1 11 BCD Semiconductor Manufacturing Limited 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 - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Limited Tel: +86-21-24162266, Fax: +86-21-24162277 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE - Wafer Fab BCD Semiconductor Manufacturing Limited Shanghai Design Group - IC SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 900, Yi Shan Road, Shanghai 200233, China 8F, Zone B, 1491, Fax: +86-21-5450 0008 Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 USA Office BCD Semiconductor Corp. USA Office 30920 Huntwood Ave. Hayward, BCD Semiconductor Corporation CA 94544, USA 30920 Huntwood Ave. Hayward, Tel 94544, U.S.A CA : +1-510-324-2988 Fax: +1-510-324-2788 Tel : +1-510-324-2988 Fax: +1-510-324-2788 Taiwan Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office BCD Taiwan Office (Taiwan) Company Limited Semiconductor Shenzhen Office Room E, SIM-BCD Semiconductor 3rd Fuzhong Road, Futian District, Shenzhen, 4F, 298-1, Rui Guang Road,(Taiwan) Company Limited Shanghai 5F, Noble Center, No.1006,Manufacturing Co., Ltd. Shenzhen Office BCD Semiconductor Nei-Hu District, Taipei, 518026, China Taiwan 298-1, Rui Guang Road, Nei-Hu District, Taipei, Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 4F, Tel: +86-755-8826 Center, Tel: Taiwan Room E, 5F, Noble 7951 No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China +886-2-2656 2808 Fax:+86-755-8826 7951 +86-755-8826 7865 Fax: +886-2-2656 28062808 Tel: Tel: +886-2-2656 Fax: +86-755-8826 7865 Fax: +886-2-2656 2806 |
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