AP3700E Datasheet, PDF (1/12 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
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 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.
· 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
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