AP3103 BCDSEMI | Alldatasheet

Document overview

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Technical content

Features

  • Bi-CMOS Process with Excellent Performance
  • Very Low Start-up Current:(< 15µA)
  • Current Mode Control
  • Non-audible-noise Green-mode Control
  • LEB (Leading-edge Blanking) on CS Pin
  • Internal Slope Compensation
  • Frequency Fold Back for High Average Effi- ciency
  • Soft Switching for Reducing EMI
  • Useful Pin Fault Protection: CS Pin Floating RI Pin Short to Ground RI Pin Floating FB/Opt-coupler Open/short
  • Comprehensive System Protection Feature: VCC Over V oltage Protection (VOVP) Over Temperature Protection (OTP) Over Load Protection (OLP)
  • Mini Size with Packages

Applications

  • Switching AC-DC Adapter/Charger
  • ATX/BTX Auxiliary Power
  • Set-top Box(STB) Power Supply
  • Open Frame Switching Power Supply

Figure 1. Package Types of AP3103

Figure 2. Pin Configuration of AP3103 (Top View)

Figure 3. Functional Block Diagram of AP3103

VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 Preliminary Datasheet Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

Ordering Information

K: SOT-23-6 G1: Green AP3103 - TR: Tape and Reel Blank: Tube P: DIP-8 Package Temperature Range Part Number Marking ID Packing Type SOT-23-6 -40 to 85oC AP3103KTR-G1 GHL Tape & Real DIP-8 -40 to 85oC AP3103P-G1 AP3103P-G1 Tube BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.

Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 Parameter Symbol Value Unit Power Supply V oltage V CC 30 V Gate Output Current IO 300 mA Input V oltage to FB, SENSE pin VFB, VSENSE -0.3 to 7 V Thermal Resistance Junction to Ambient θJA SOT-23-6 250 oC/WDIP-8 100 Power Dissipation and Thermal Charac- teristic, SENSE at TA<25oC PD SOT-23-6 500 mW DIP-8 1250 Operating Junction Temperature TJ -40 to150 oC Storage Temperature Range TSTG 150 oC ESD (Human Body Model) 3000 V ESD (Machine Model) 300 V Note 1: Stresses greater than those listed under "A bsolute 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 Max- imum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply V oltage V CC 10 25 V Ambient Operating Temperature Range T A -40 85 oC Absolute Maximum Ratings (Note 1)

VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 Preliminary Datasheet Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Parameter Symbol Conditions Min Typ Max Unit Supply Voltage (VCC Pin) Start-up Current I START-UP VCC=14.8V 5 15 µA Operating Supply Current ICC VFB=0V , CL=1nF, RRI=100kΩ 123 mA VFB=3V , CL=1nF, RRI=100kΩ 0.65 1.65 2.65 UVLO (on) 14 15 16 V UVLO (off) 7.8 8.8 9.8 V VCC OVP 27 28 29 V VCC Clamp I CC=5mA 34 35.5 37 V PWM Section/Oscillator Section Maximum Duty Cycle 70 75 80 % Minimum Duty Cycle 0 Oscillation Frequency R RI=100kΩ 60 65 70 kHz Green Mode Frequency R RI=100kΩ 22 kHz Frequency Temperature Stability -40oC to 85oC 5% Frequency V oltage Stability VCC=12 to 30V 3% Frequency Dithering ±6% Current Sense Section (SENSE Pin) Maximum SENSE V oltage V CS VFB=3.3V , RRI=100kΩ 0.800 0.850 0.900 V LEB Time of SENSE 150 250 350 ns Delay to Output 50 150 250 ns Soft-start Time 0.5 ms Feedback Input Section (FB Pin) The Ratio of Input V oltage to Current Sense V oltage 2 . 533 . 5 V / V Input Impedance 3 4.5 6 k Ω Source Current V Input V oltage for Zero Duty 1.5 V Output Section (GATE Pin) Output Low Level I O=20mA, VCC=12V 1 V Output High Level I O=20mA, VCC=12V 8 V Output Clamping 16 17.5 19 V Rising Time C L=1nF, VCC=13V 120 220 320 ns Falling Time C L=1nF, VCC=13V 30 50 90 ns

Electrical Characteristics

VCC=16V , TA=25oC, unless otherwise specified.

Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 VCC=16V , TA=25oC, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit Over Temperature Protection Section Shutdown Temperature 140 oC Temperature Hysteresis 20 oC Delay Time Section Delay 1 of Protection OLP 35 ms Delay 2 of Protection VCC OVP 25 µs

Figure 8. VCC OVP vs. Ambient Temperature Figure 9. fOSC vs. Ambient Temperature

VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 Preliminary Datasheet Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Operation Description The AP3103 is specifically designed for off-line AC- DC power supply used in LCD monitor, notebook adapter and battery charger applications. It offers a cost effective solution with a versatile protection function. Start-up Current and UVLO The start-up current of AP31 03 is optimized to realize ultra low current (5 µA typical) so that VCC capacitor can be charged more quickly. The direct benefit of low start-up current is the availa bility of using large start- up resistor, which minimizes the resistor power loss for high voltage AC input. An UVLO comparator is included in AP3103 to detect the voltage on the VCC pin. It ensures that AP3103 can draw adequate energy fr om hold-up capacitor during power on. The turn-on threshold is 15V and the turn- off threshold is 8.8V . Oscillator The oscillation frequency is programmed by the value of resistor R1, connected from pin RI to ground. The resistor will make a constant current source to determine the oscillation frequency by charging and discharging an internal capacitor. Normally, RI pin should not be placed where exists too much noise, as the disturbance may make the IC work abnormally. The oscillation frequency can be expressed as: The recommended oscillation frequency is 50 to 100 kHz from the EMI consideration. Current Sense Comparator and PWM Latch The AP3103 operates as a current mode controller; the output switch conduction is initiated by every oscillator cycle and is terminated when the peak inductor current reaches the threshold level established by the FB pin. The inductor current signal is converted to a voltage signal by inserting a reference sense resistor R S. The inductor current under normal operating conditions is controlled by the voltage at FB pin, the relation between peak inductor current (I PK) and VFB is: Leading-edge Blanking A narrow spike on the lead ing edge of the current waveform can usually be observed when the power MOSFET is turned on. A 250ns leading-edge blank is built-in to prevent the false-triggering caused by the turn-on spike. During this period, the current limit comparator is disabled and the gate driver can not be switched off. FB Pin and Short Circuit Protection This pin is normally connected to the opt-coupler and always paralleled wi th a capacitor for loop compensation. When the voltage at this pin is great than 4.2V (such as output short to ground or the opt- coupler is broken) and lasts for about 25ms, the IC will enter the protection mode. For AP3103, the system will enter hiccup mode to wait the VCC decreasing to low UVLO level, then the IC will try to restart until the failure removed. And when this voltage is less than 1.5V , the IC will stop the drive pulse immediately. Therefore, this feature can be used for short circuit protection, which makes the systemimmune from catastrophic failure. Normal ly, output short makes the VFB value to the maximum because the opt-coupler is cut off. System Protection and Pin Fault Protection The AP3103 provides versatile system and pin fault protections. The OCP compar ator realizes the cycle- by-cycle current limiting (OCP).In universal input line voltage, the IC realizes the constant over load protection (OLP). VCC over voltage protection can be applied as the primary OVP or opt-coupler broken protection. The AP3103 also has pin fault connection protection including floating and short connection. The floating pin protection include the RI, SENSE, FB, etc; The short pin protection includes the RI pin short protection. When these pins are floated or RI pin is shorted to ground, PWM switching will be disabled, thus protecting the power system. )(1 6500 kHz kR f Ω SFBPK RVI 3/)8.0( −=

Figure 10. Typical Application of AP3103

VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 Preliminary Datasheet Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Mechanical Dimensions SOT-23-6 Unit: mm(inch) 2.820(0.111) 3.020(0.119) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 0.950(0.037)TYP 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.400(0.016) 0.700(0.028)REF 0.100(0.004) 0.200(0.008) 0.200(0.008) 0.300(0.012) 0.600(0.024) 0.000(0.000) 0.100(0.004) 0.900(0.035) 1.300(0.051) 1.450(0.057) MAX 123 456 Pin 1 Dot by Marking

Feb. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Preliminary Datasheet VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER AP3103 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 Mechanical Dimensions (Continued) Note: Eject hole, oriented hole and mold mark is optional.

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 IMPORTANT NOTICE 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 Co., Ltd.

800 Yi Shan Road, Shanghai 200233, China

Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen, 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 Corp. 30920 Huntwood Ave. Hayward, CA 94544, USA Tel : +1-510-324-2988 Fax: +1-510-324-2788 - Headquarters BCD Semiconductor Manufacturing Limited No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Tel: +86-21-24162266, Fax: +86-21-24162277