AP3700 Datasheet, PDF (1/10 Pages) BCD Semiconductor Manufacturing Limited – LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER

Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
General Description
Features
AP3700
The AP3700 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 0.18Watt.
In normal operation, the AP3700 switches on and off at
a fixed switching frequency of 60 kHz. With a current
limit capability of 420mA, the AP3700 can directly
drive the emitter of high voltage NPN transistor or the
source of MOSFET. When output power falls below a
given level, the IC enters skip cycle mode to reduce
power consumption.
The AP3700 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 Dither for Low EMI: ±2.5kHz
· Under-Voltage Lockout Protection
· Over-Current Protection
· Internal Short Circuit Protection
· Higher Output Breakdown Voltage
· Lower Total Cost Solution
Applications
· Battery Chargers
· Off-Line Power Supplies
The AP3700 is available in TO-92 package.
Jan. 2007 Rev. 1. 1
TO-92
Figure 1. Package Types of AP3700
BCD Semiconductor Manufacturing Limited
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