SP689B  是一款高压启动IC.

HV电压能达到700V.

SP689B is a low cost version ultra high voltage

start up IC. This IC is ideal to use in conjunction with

any PWM to further reduce the standby power. By

using SP689A, it can eliminate the need for startup

resistors and bleeder resistors in switching mode

power supply design. It would provide the users a

superior AC/DC power application with higher

efficiency and lower standby power. With low

external component counts, SP689A is a low cost

solution for the applications.

SP689B is available in SOT-23-5L package

可有以下应用：

AC/DC Switching Power Adaptor

Battery Charger

 Open-Frame Switching Power Supply

LED Power Supply