ME8401ASG

General Description

The ME8401 is a current-mode PFC controller operating in Transition Mode (TM). Pin-to-pin compatible with the

predecessor ME8401, it offers improved performance. The highly linear multiplier includes a special circuit, able

to reduce AC input current distortion, that allows wide-range-mains operation with an extremely low THD, even

over a large load range. The output voltage is controlled by means of a voltage-mode error amplifier and a precise

(1% @Tj =25°C) internal voltage reference. The device features extremely low consumption (≤120 uA before

start-up and <2mA running) and includes a disable function suitable for IC remote ON/OFF, which makes it easier

to comply with energy saving norms (Blue Angel, EnergyStar, Energy2000, etc.). An effective two-step OVP enables

to safely handle overvoltage either occurring at start-up or resulting from load disconnection. The totem-pole output

stage, capable of 600mA source and 800mA sink current, is suitable for big MOS-FET or IGBT drive which, combined

with the other features, makes the device an excellent low-cost solution for EN61000-3-2 compliant SMPS's up to 300W.

Features

●Transition-Mode control of PFC pre-regulators

●Proprietary multiplier design for minimum THD of AC input current

●Very precise adjustable output overvoltage protection

●Ultra-low(≤120uA) start-up current

●Extended IC supply voltage range

●On-chip filter on current sense

● Disable function

●1%(@ Tj = 25 °C) internal reference voltage

●-600/+800mA totempole gate driver with UVLO pull-down and voltage clamp

Typical Application

PFC pre-regulators for:

●IEC61000-3-2 compliant SMPS(TV, Desktop PC, Monitor) up to 300W

● Hi-end AC-DC adapter/charger

●Entry level server & web server

Package

●8-pin SOP8、DIP8