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 cur-
rent limit capability of 460mA, the AP3700E can
directly drive the emitter of high voltage NPN transis-
tor. When output power falls below a given level, the
IC enters skip cycle mode to reduce power consump-
tion.
The AP3700E also features under-voltage lockout,
over-current and short circuit protections.
The AP3700E is available in TO-92 package.