Datasheet Summary
Current-mode PWM Controller
GENERAL DESCRIPTION
Features
The PT2209 is a highly integrated current mode PWM controller， providing low standby power and cost effective system solution for the flyback converter applications. The PT2209 operates at fixed 65kHz frequency. Under no load or light load conditions, PWM frequency is reduced to minimize switching loss, low standby power and high efficiency is thus achieved. The PT2209 also Features low VDD startup current which also contributes to low standby power. The built in LEB on the current sense input removes the signal glitches due to snubber circuit diode reverse recovery and thus reduces the external ponent count and the...