AP3700E

Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER General Description Features AP3700E 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. · 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 is available in TO-92 package. May 2008 Rev. 1. 1 TO-92 (Buck Packing) TO-92 (Ammo Packing) Figure 1. Package Types of AP3700E BCD Semiconductor Manufacturing Limited 1 Data Sheet LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER Pin Configuration AP3700E...