AP3710 BCDSEMI | Alldatasheet

Document overview

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Technical content

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-V oltage Lockout with Hysteresis
  • Built-in Slope Compensation
  • Short Circuit Protection
  • Open and Short Circuit Protection for Opto- Coupler
  • 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

Figure 1. Package Types of AP3710

Figure 2. Pin Configuration of AP3710 (Top View)

1 GND Power supply ground

2 VCC The power supply of the IC and this term inal is also used for the feedback control

4 OUT The PWM output is directly connected to the emitter of NPN transistor or the source

Figure 3. Functional Block Diagram of AP3710

LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER AP3710 Preliminary Datasheet BCD Semiconductor Manufacturing LimitedNov. 2007 Rev. 1. 2 Parameter Value Unit Supply V oltage -0.3 to 6.3 V V oltage at OUT -0.3 to 40 V Analog Input at VSEN -0.3 to 6.3 V Output Current at OUT Internally limited A Power Dissipation 0.6 W Operating Junction Temperature 150 oC Storage Temperature -65 to 150 oC Lead Temperature (Soldering, 10s) 300 oC ESD (Machine Model) 300 V Note 1: Stresses greater than those li sted under "Absolute Maximum Ratings" may cause permanent dama ge to the device. These are stress ratings only, and functional operation of the de vice at these or any other conditions beyond t hose indicated under "Recommended Operating Conditions" is not implied. Exposure to "A bsolute Maximum Ratings" for extended periods may affect device reliability. Absolute Maximum Ratings (Note 1) Package Switching Frequency Temperature Range Part Number Marking ID Packing Type SOIC-8 60kHz -40 to 85oC AP3710M-E1 3710M-E1 Tube AP3710MTR-E1 3710M-E1 Tape & Reel DIP-8 60kHz -40 to 85oC AP3710P-E1 AP3710P-E1 Tube BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.

Ordering Information

E1: Lead Free AP3710 - TR: Tape and Reel Blank: Tube M: SOIC-8 P: DIP-8

LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER AP3710 Preliminary Datasheet BCD Semiconductor Manufacturing LimitedNov. 2007 Rev. 1. 2 Parameter Symbol Condi tions Min Typ Max Unit UVLO SECTION Turn on Threshold V oltage V CC (on) 5.30 5.60 5.90 V Turn off Threshold V oltage V CC (off) 3.4 3.65 3.90 V Discharge V oltage V DIS 2.7 2.9 3.1 V STANDBY CURRENT SECTION Start-up Current I ST VCC=4V 0.25 0.4 mA Operating Current I CC(opr) 0.45 0.7 VCC Zener V oltage V Z ICC=10mA 6.5 7 7.5 V Dynamic Impedance R VCC VCC=3.8 to 4.8V (Note 2) 10 18 30 k Ω INTERNAL OSCILLATOR Switching Frequency F SW (Note 3) 50 60 70 kHz Frequency Dithering ±2 ±3.5 ±5 kHz Temperature Stability -40 to 85oC 5% DRIVE OUTPUT SECTION OUT Turn-on V oltage V OUT(on) 7.6 9.3 11 V OUT Turn-off V oltage V OUT(off) 5.7 6.8 7.9 V Rise Time T R CL=1nF, 15Ω pull-up 60 ns Fall Time T F CL=1nF, 15Ω pull-up 30 Maximum Duty Cycle D MAX VCC(off) + 0.2V 68 75 82 % Minimum Duty Cycle V CC=VCC (on)-0.2V 3 5 Driver OUT On-Resistance R OUT IOUT=0.7A 3 5 Ω Switch Off Current (OUT) Driver off, V OUT=10V 20 40 µA Effective Current Limit I LIM VCC=VCC(off)+0.5V 800 900 mA OUT Current Coefficient G A -0.6 A/V CURRENT SECTION Maximum Input Signal V SEN 0.9 1.0 1.1 V (VCC=4V , TJ=25oC, unless otherwise specified.)

Electrical Characteristics

Note 2: Guaranteed by design, not tested in production. Note 3: The fixed oscillation frequency, the frequency jittering is not included.

Figure 4. The Test Circuit for Current Limit

again and the same process will repeat indefinitely. output short circuit condition. Figure 18. Short Circuit Protection Block

Figure 19. 12V/1A Adapter

LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER AP3710 Preliminary Datasheet BCD Semiconductor Manufacturing LimitedNov. 2007 Rev. 1. 2 Bill of Materials for Figure 19 Designator Part Type Designator Part Type R1 Resistor, NT C Resistor, 5Ω C1, C2 Electrolytic Capacitor, 10 µF/400V , φ10 R2, R3 Resistor, 1M Ω, 1206 C3 Capacitor, 2200pF, d=5mm R4 Resistor, 68k Ω, 1206 C4, C5 Capacitor, 10 µF, d=4.5mm R5 Resistor, 3 Ω, 0805 C6 Capacitor, 22nF, 0805 R6 Resistor, 200 Ω, 0805 C7 Capacitor, 0.47 µF, 0805 R7 Resistor, 2k Ω, 0805 C8 Electrolytic Capacitor, 1000 µF R8 Resistor, 5.1M Ω, SIP C9 Electrolytic Capacitor, 220 µF R9, R15, R16 Resistor, 3k Ω, 0805 C10 Y Capacitor, 2200pF R11 Resistor, 15 Ω, 1206 C11 Capacitor, 1nF, 0805 R13 Resistor, 1k Ω, 0805 Q1 Transistor, APT13003, TO126 R14 Resistor, 11.4k Ω, 0805 U3 Opto-coupler, PC817, DIP-4 D1 to D4 Diode, 1N4007, DO-41 L2 Inductor, 300 µH/0.3A D5, D6 Diode, 1N4148, LL-34 L4 Inductor, 100 µH/1A D7 Diode, FR107, DO-15 ZD2 Zener, 13V/1W D8 Diode, 3100, DO-201 T1 Transformer, EE-20

LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER AP3710 Preliminary Datasheet BCD Semiconductor Manufacturing LimitedNov. 2007 Rev. 1. 2 Mechanical Dimensions Unit: mm(inch)SOIC-8 R0.150(0.006) R0.150(0.006) 1.000(0.039) 0.330(0.013) 0.510(0.020) 1.350(0.053) 1.750(0.069) 0.100(0.004) 0.300(0.012) 0.900(0.035) 0.800(0.031) 0.200(0.008) 3.800(0.150) 4.000(0.157) 20:1 D 1.270(0.050) TYP 0.190(0.007) 0.250(0.010) D 5.800(0.228) 6.200(0.244) 0.675(0.027) 0.725(0.029) 0.320(0.013) 0.450(0.017) 0.800(0.031) 4.700(0.185) 5.100(0.201) φ

LOW POWER PWM CONTROLLER FOR OFF-LINE ADAPTER AP3710 Preliminary Datasheet BCD Semiconductor Manufacturing LimitedNov. 2007 Rev. 1. 2 Mechanical Dimensions (Continued) DIP-8 Unit: mm(inch) R0.750(0.030) 0.254(0.010)TYP 0.130(0.005)MIN 8.200(0.323) 9.400(0.370) 0.204(0.008) 0.360(0.014) 7.620(0.300)TYP 0.700(0.028) 9.000(0.354) 9.400(0.370) 3.710(0.146) 4.310(0.170) 3.000(0.118) 3.600(0.142) 0.360(0.014) 0.560(0.022) 6.600(0.260) 3.200(0.126) 3.600(0.142) 0.510(0.020)MIN Φ3.000(0.118) Depth 0.100(0.004) 0.200(0.008) 1.524(0.060) TYP

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations 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. - 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 MAIN SITE 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 - 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 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com BCD Semiconductor Manufacturing Limited