AP3902 700VCBO AP3902P-E1 AP3902P-G1 10F/400V 1000F AZ431 PC817 1N4007 DO-41

LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 General Description Features The AP3902 PWM power switch consists of a

Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 General Description Features The AP3902 AP3902 PWM power switch consists of a fixedfrequency current-mode PWM controller and a high voltage transistor. It is specifically designed for high performance off-line switching power supplies or nonisolated small household applications. Compared to discrete MOSFET and PWM controller power supply solutions, AP3902 AP3902 solution offers advantages such as fewer component numbers, smaller size, and lower total cost. · Built-in NPN Transistor with 700VCBO 700VCBO · · · · · · Current Mode Control with Skip Cycle Capability Low Operating Current: 0.45mA Fixed Switching Frequency: 60kHz Frequency Dithering for Low EMI Short Circuit Protection Open and Short Circuit Protection for OptoCoupler Maximal Input Power less than 0.2W under no Load Output Power Range: 5W to 10W for Adapter with Outer Enclosure 5W to 13W for Open Frame Application · In normal operation, the AP3902 AP3902 features with a fixed switching frequency. When the output power falls below a given level, the circuits automatically switches to a burst mode by skipping some switching cycles. In case of failure modes like open loop, over voltage or overload due to short circuit, the device switches into auto restart mode which is controlled by the internal protection unit. · Applications · · · · · This IC adopts frequency dithering technique to reduce EMI. The AP3902 AP3902 is available in DIP-8 package. Induction Cooker Set-Top Boxes/DVB Adapters Auxiliary Power Supplies DVD DIP-8 Figure 1. Package Type of AP3902 AP3902 Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Pin Configuration P Package ( DIP-8) VA 1 8 GND VS 2 7 NC VCC 3 6 C B 4 5 C Figure 2. Pin Configuration of AP3902 AP3902 (Top View) Pin Description Pin Number Pin Name Function 1 VA This pin is used for short circuit protection, and it will be pulled to low level when short circuit happens at the load terminal 2, VS It is used for line voltage compensation, and PWM uses this pin to terminate the output switch conduction 3 VCC 4 B It is internally connected with the base terminal of internal NPN transistor 5, 6 C It is internally connected with the collector terminal of internal NPN transistor 7 NC 8 GND The power supply of the IC and it is also used for the feedback control No connection to IC Supply ground Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 2 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Functional Block Diagram VCC 3 5, 6 Start-up Current Source Bias B NPN Transistor OSC UVLO + VREF 4 C - (1.2 V) FB Emitter OUT + VREF - PWM Comparator PWM Logic Driver VS 2 Short Circuit Protection Slope Compensation 1 VA + VREF (1.2 V) Discharge Comparator Discharge Logic - 8 GND Figure 3. Functional Block Diagram of AP3902 AP3902 Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 3 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Ordering Information AP3902 AP3902 E1: Lead Free G1: Green Circuit Type Package P: DIP-8 Package -40 to 85oC Part Number Temperature Range DIP-8 Blank: Tube Lead Free AP3902P-E1 AP3902P-E1 Marking ID Green AP3902P-G1 AP3902P-G1 Lead Free Green AP3902P-E1 AP3902P-E1 AP3902P-G1 AP3902P-G1 Packing Type Tube 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 Symbol Value Unit VCES 700 V Voltage at the Emitter of Internal NPN Transistor VE -0.3 to 40 V Supply Voltage VCC -0.3 to 6.3 V Analog Input at VS VS -0.3 to 6.3 V VA Pin Voltage VA -0.3 to 40 V 1 A Power Dissipation 1.3 W Operating Junction Temperature 150 oC Collector Pin Voltage Continuous Collector Current Storage Temperature -65 to 150 o C Lead Temperature (Soldering, 10s) 300 o C ESD (Human Body Model) 3000 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. Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 4 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Electrical Characteristics (VCC=4V, TJ=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit Power Transistor Section Collector-Emitter Breakdown Voltage VCES Collector-Emitter Saturation Voltage VCE, SAT IC=0.5A, IB=0.1A hFE IC=0.5A, VCE=2V DC Current Gain VBE=0, ICE=100A 700 V 0.3 13 18 V 30 UVLO Section Turn on Threshold Voltage VCC(on) 5.00 5.25 5.50 V Turn off Threshold Voltage VCC(off) 3.37 3.55 3.73 V VDIS 2.7 2.9 3.1 V 0.22 0.4 0.45 0.7 Discharge Voltage Standby Current Section Start-up Current Operating Current IST VCC = 4V ICC(op) VCC Zener Voltage VZ Dynamic Impedance RVCC ICC=5mA 6.5 VCC = 3.8Vto 4.8V mA V 18 26 k 55 60 70 ±2 ±3.5 ±5 5 10 % 8.5 11 V 6 7.2 V Internal Oscillator Section Switching Frequency fSW Frequency Dithering Temperature Stability -40 to 85oC kHz Driver and Output Section OUT Turn on Voltage VOUT(on) OUT Turn off Voltage VOUT(off) 4.8 Rise Time tR CL=1nF, 15 pull-up 60 Fall Time tF CL=1nF, 15 pull-up 30 ns Maximum Duty Cycle DMAX VCC(off) + 0.2V 68 75 82 % VCC=VCC(on) - 0.2V Minimum Duty Cycle Driver OUT On-Resistance ILIM IOUT=0.7A 2.5 4 Driver off, VOUT=10V ROUT Switch Off Current Effective Current Limit 3 20 40 A 800 920 mA VCC=VCC(off) + 0.5V Sep. 2008 Rev. 1.0 680 BCD Semiconductor Manufacturing Limited 5 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Thermal Impedance Parameter Symbol Value Junction to Ambient RJA 60 Junction to Case RJC Unit 30 o C/W Typical Performance Characteristics 500 400 480 460 Operating Current (A) Start-up Current (A) 350 300 250 200 440 420 400 380 360 340 150 320 100 -40 -20 0 20 40 60 80 100 300 -40 120 -20 0 20 40 60 80 100 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 4. Start-up Current vs. Ambient Temperature Figure 5. Operating Current vs. Ambient Temperature 70 69 68 Switching Frequency (kHz) 67 66 65 64 63 62 61 60 59 58 57 56 55 -40 -20 0 20 40 60 80 100 o Ambient Temperature ( C) Figure 6. Switching Frequency vs. Ambient Temperature Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Typical Application R1 C1 L2 + J1 AC 85264V R11 C10 C2 L3 D8 R4 C3 C11 + + C9 Z2 Zener + C8 D1-D4 T1 D7 J2 12V/0.85A D5 R3 R13 R5 U3 R8 C7 C VS R14 VCC VA D6 B R6 C6 + C4 GND R7 U2 R15 C5 R16 U1 AP3902 AP3902 Figure 7. 12V/0.85A Off-Line Adapter Application Circuit Part Type Designator Part Type Resistor, NTC Resistor, 5 R1 Capacitor, 10F/400V 10F/400V Resistor, 2 M, 1206 R3 Capacitor, 2200pF Resistor, 68 k , 1206 R4 Capacitor, 10F Resistor, 3 , 1206 R5 Capacitor, 22nF, 0805 Designator C1, C2 C3 C4, C5 C6 Resistor, 240, 0805 R6 Capacitor, 0.47F, 0805 C7 Resistor, 2k, 0805 R7 Electrolytic Capacitor, 1000F 1000F C8 Resistor, 5.1 M R8 Electrolytic Capacitor, 220F C9 Resistor, 15 , 1206 R11 Y Capacitor, 2200pF C10 Resistor, 200, 0805 R13 Capacitor, 1nF, 0805 C11 Resistor, 12k, 0805 R14 AP3902 AP3902, DIP-8 U1 Resistor, 4.7k, 0805 R15 AZ431 AZ431, TO-92 U2 Resistor, 3.1k, 0805 R16 Opto-Coupler, PC817 PC817, DIP-4 U3 Diode, 1N4007 1N4007, DO-41 DO-41 Inductor, 300H/0 300H/0.3A L2 D5, D6 Inductor, 10H/1A 10H/1A L3 Diode, FR107 FR107, DO-15 DO-15 D7 Transformer, EE-20 EE-20 T1 Diode, 3100, DO-201 DO-201 D8 Zener, 13V/1W Z2 Diode, 1N4148 1N4148 D1 to D4 Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 7 Data Sheet LOW POWER PWM SWITCH FOR OFF-LINE SMPS AP3902 AP3902 Mechanical Dimensions DIP-8 Unit: mm(inch) 0.700(0.028) 7.620(0.300)TYP 1.524(0.060) TYP 6° 5° 6° 3.200(0.126) 3.600(0.142) 3.710(0.146) 4.310(0.170) 4° 4° 0.510(0.020)MIN 3.000(0.118) 3.600(0.142) 0.204(0.008) 0.360(0.014) 8.200(0.323) 9.400(0.370) 0.254(0.010)TYP 2.540(0.100) TYP 0.360(0.014) 0.560(0.022) 0.130(0.005)MIN 6.200(0.244) 6.600(0.260) R0.750(0.030) 3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 9.000(0.354) 9.400(0.370) Sep. 2008 Rev. 1.0 BCD Semiconductor Manufacturing Limited 8 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 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 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