Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
General Description
Features
AP3700/A
The AP3700/A...
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
General Description
Features
AP3700/A
The AP3700/A 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/1A, the maximum standby power is only 0.18W.
In normal operation, the AP3700/A switches on and off at a fixed switching frequency of 60 kHz. With a current limit capability of 460mA for AP3700 and 500mA for AP3700A, the AP3700/A 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 AP3700/A 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 AP3700/A is available in TO-92 package.
Mar. 2008 Rev. 1. 4
TO-92 (Bulk Packing)
TO-92 (Ammo Packing)
Figure 1. Package Types of AP3700/A
BCD Semiconductor Manufacturing Limited 1
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTER...