AP3700E AP3700 AP3700EZ-E1 AP3700EZ-G1 3700EZ-E1 3700EZ-G1 AP3700EZTR-E1 - Datasheet Archive

 

LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER General Description Features The AP3700E is a green-mode pulse width

 

Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER General Description Features The AP3700E 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. · · · · · · · · · AP3700E AP3700E In normal operation, the AP3700E AP3700E switches on and off at a fixed switching frequency of 60 kHz. With a current limit capability of 460mA, the AP3700E 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. 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 The AP3700E AP3700E also features under-voltage lockout, over-current and short circuit protections. The AP3700E AP3700E is available in TO-92 package. TO-92 (Buck Packing) TO-92 (Ammo Packing) Figure 1. Package Types of AP3700E AP3700E May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Pin Configuration Z Package (TO-92) 3 OUT 2 GND 1 VCC Figure 2. Pin Configuration of AP3700E AP3700E (Top View) Pin Description Pin Number Pin Name Function 1 VCC 2 GND Supply ground 3 OUT The output pin, connected to the emitter of NPN transistor or the source of MOSFET The power supply of the IC, and is generally connected to opto-coupler's emitter May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 2 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Functional Block Diagram VCC 1 3 REGULATOR VREF _ UVLO COMPARATOR SHORT CIRCUIT COMPARATOR _ + + _ OSCILLATOR SLOPE COMPENSATION + + BANDGAP & VREF BIAS VREF + TIMER CLAMP COMPARATOR OUT DRIVER PWM CONTROL _ PWM COMPARATOR GND 2 Figure 3. Functional Block Diagram of AP3700E AP3700E May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 3 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Ordering Information AP3700 AP3700 E1: Lead Free G1: Green Circuit Type TR: Ammo Blank: Tube Package Z: TO-92 E: AP3700E AP3700E Package Switching Frequency Temperature Range 60kHz -40 to 85oC TO-92 Part Number Lead Free Packing Type Marking ID Green Lead Free Green AP3700EZ-E1 AP3700EZ-E1 AP3700EZ-G1 AP3700EZ-G1 3700EZ-E1 3700EZ-E1 3700EZ-G1 3700EZ-G1 Bulk AP3700EZTR-E1 AP3700EZTR-E1 AP3700EZTR-G1 AP3700EZTR-G1 3700EZ-E1 3700EZ-E1 3700EZ-G1 3700EZ-G1 Ammo 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 Value Unit Supply Voltage -0.3 to 6.0 V Voltage at OUT (Note 2) -0.3 to 40 V Output Current at OUT Internally limited A Power Dissipation 0.6 W Operating Junction Temperature 150 o C -65 to 150 o C Storage Temperature Lead Temperature (Soldering, 10s) 300 oC ESD (Machine Model) 200 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 BCD Semiconductor Manufacturing Limited 4 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Electrical Characteristics (VCC=4.5V, TJ=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit VTH (ST) 5.5 5.75 5.95 V VOPR(min) 3.6 3.8 4.0 V 0.22 0.45 0.45 0.7 UVLO SECTION Start-up Voltage Minimal Operating Voltage STANDBY CURRENT SECTION Start-up Current (Note 3) IST Operating Current VCC Zener Voltage VZ VCC=4.5V ICC(OPR) Dynamic Impedance RVCC ICC=10mA 6 mA V 18 VCC=3.8 to 4.8V 6.3 k INTERNAL OSCILLATOR Switching Frequency 50 Temperature Stability kHz ±2.5 ±3 kHz 10 % 9.5 -40 to 85o 75 5 Frequency dithering 60 ±2 fSW 12 V 5.5 6.5 V C DRIVE OUTPUT SECTION OUT Turn-on Voltage VOUT(ON) OUT Turn-off Voltage VOUT(OFF) 5 Rise Time TR CL=1nF, 15 pull-up 60 Fall Time TF CL=1nF, 15 pull-up 30 Maximum Duty Cycle DMAX VOPR(min) + 0.2V 67 Minimum Duty Cycle Driver OUT On-Resistance OUT Current Coefficient 84 % 3 ROUT ILIM IOUT=0.06A 20 3 Driver off, VOUT=10V Switch Off Current (OUT) Effective Current Limit 75 ns VCC = VOPR+0.1V 460 A mA -0.3 GA 40 A/V Note 3: AP3700E 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 BCD Semiconductor Manufacturing Limited 5 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Typical Performance Characteristics 300 0.60 0.58 280 Start-up Current (A) operating current(mA) 0.56 0.54 0.52 0.50 0.48 260 240 220 0.46 -40 -20 0 20 40 60 80 100 200 -40 -25 -10 120 5 20 35 50 65 80 95 110 125 o Ambient Temperature ( C) o Ambient Temperature ( C) Figure 4. Operating Current vs. Ambient Temperature Figure 5. Start-up Current vs. Ambient Temperature 70 500 69 400 67 66 Start-up Current (A) Switching Frequency (kHZ) 68 65 64 63 62 61 60 59 300 200 100 58 57 56 55 -40 0 -20 0 20 40 60 80 100 120 o 1 2 3 4 5 VCC Voltage (V) Ambient Temperature ( C) Figure 6. Switching Frequency vs. Ambient Temperature May 2008 Rev. 1. 1 Figure 7. Start-up Current vs. VCC Voltage BCD Semiconductor Manufacturing Limited 6 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Typical Performance Characteristics (Continued) 540 Current limit(mA) 520 500 480 460 440 420 400 -40 -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Figure 8. Current Limit vs. Ambient Temperature May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 7 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Function Description 1. Startup Circuit Figure 3 is the functional block diagram of AP3700E 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 AP3700E 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 . CH1: VCC CH2: OUT 4. Current Limit Control The AP3700E 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. 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 BCD Semiconductor Manufacturing Limited 8 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Typical Application Bridge D1-D4 1N4007 1N4007*4 J1 AC 85-264V L1 330 + C1 4.7 C2 4.7 R2 R4 1.5M 100k + T1 EE16 L2 5.5 C9 470 C11 470 + C3 2200p + D9 APD240 APD240 D5 FR107 FR107 R15 2k D8 1N4148 1N4148 R5 4.7 Z1 12V C8 0.1 R9 100k U3 PC817 PC817 D6 1N4148 1N4148 R13 6.2k Rs 0.25 C10 47 D7 1N4148 1N4148 Q1 APT13003 APT13003 5V/0.8A + R1 10/1W 10/1W R8 200 C7 2.2n R6 200 3 R7 200 OUT + C4 10 VCC GND 2 U1 AP3700E AP3700E 1 3 C5 0.47 C6 6.8n 6 R10 22k Vcc VOUT VCTRL 1 VCC VSENSE 5 GND 2 R11 510 R12 100 4 ICTRL U2 AP4313 AP4313 Figure 11. 5V/0.8A Output for Battery Charger of Mobile Phone May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 9 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Mechanical Dimensions TO-92 (Bulk Packing) Unit: mm(inch) 1.100(0.043) 3.430(0.135) MIN 3.700(0.146) 3.300(0.130) 1.400(0.055) 0.360(0.014) 0.510(0.020) 0.000(0.000) 0.380(0.015) 1.600(0.063) MAX 4.700(0.185) 0.380(0.015) 0.550(0.022) 14.100(0.555) 14.500(0.571) 4.300(0.169) 4.400(0.173) 4.700(0.185) 1.270(0.050) TYP 2.440(0.096) 2.640(0.104) May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 10 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER AP3700E AP3700E Mechanical Dimensions TO-92 (Ammo Packing) Unit: mm(inch) 1.100(0.043) 1.270(0.050) Typ 4.500(0.177) 5.500(0.217) 0.360(0.014) 3.700(0.146) 0.000(0.000) 0.380(0.015) 1.600(0.063) MAX 14.000(0.551) 0.510(0.020) 13.000(0.512) 3.300(0.130) 1.400(0.055) 3.430(0.135) MIN 4.700(0.185) 4.300(0.169) 4.400(0.173) 4.700(0.185) 0.380(0.015) 0.550(0.022) 2.540(0.100) Typ May 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 11 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. 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