TOPSwitch-FX family is a design flexible, eco-smart, integrated off-line switcher
The document describes the TOPSwitch-FX Family from Integrations, Inc., which uses a proven topology to integrate high voltage power MOSFETs, PWM control, and fault protection onto a single CMOS chip. Key innovations include two added terminals: a MULTI-FUNCTION (M) pin for programmable line OV/UV shutdown or current limiting, and an optional FREQUENCY (F) pin in the Y package for half-frequency operation.
The TOP234Y model provides a maximum output power of 75 W at 230 VAC.
Connecting the FREQUENCY pin to the CONTROL pin selects a switching frequency of 65 kHz.
Connecting the MULTI-FUNCTION pin to the SOURCE pin disables all functions on that pin and makes the device operate in simple three terminal mode.