AN4129 - Green Current Mode PWM Controller FAN7601
1.
Start-up Circuit And Reference The FAN7601 contains a start-up switch to reduce power loss in the external start-up circuit of conventional PWM converters.
The internal start-up circuit charges the Vcc capacitor with a 1mA current source if the line is connected until the soft start is completed
AN4129 Features
* of the FAN7601. This device is a BCDMOS programmable frequency current mode PWM controller which is designed for off-line adapter applications and auxiliary power supplies. To reduce power loss at light and no load, the FAN7601 operates in burst mode and it includes a start-up switch to reduce the l
