ME8311ASG

General Description

The ME8311 is a high performance offline PSR controller for low power AC/DC charger and adapter applications.

 ME8311 integrates a high voltage power MOSFET of 600V. 1A. It operates in primary-side sensing and regulation.

 Consequently, opto-coupler and ME431 could be eliminated. Proprietary Constant Voltage (CV) and Constant

Current (CC) control is integrated as shown in the figure.1 below. In CC control, the current and output power

 setting can be adjusted externally by the sense resistor RS at CS pin. In CV control, PFM operations are utilized

to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable

drop compensation. The chip consumes very low operation current (typical 420μA), it can achieve less than 30mW

 standby power to meet strict standby power standard. ME8311 offers comprehensive protection coverage with

auto-recovery features including Cycle-by-Cycle current limiting, VDD over voltage protection, feedback loop open

 protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), etc.

Features

●High precision constant current regulation at universal AC input

●Primary-side sensing and regulation without ME431 and opo-coupler

●Built-in primary winding inductance compensation

●Programmable cable drop compensation

●Ultra low start-up current (Typ. 1μA)

●VDD over voltage protection

●Built-in feedback loop open protection

●Built-in leading edge blanking (LEB) ●

Built-in short circuit protection

●Cycle-by-Cycle current limiting

●VDD under voltage lockout with hysteresis (UVLO)

Typical Application

Low power AC/DC offline SMPS for:

●Cell phone charge

●Digital cameras charger

●Small power adapter

●Auxiliary power for PC, TV, etc.

Package

●8-pin SOP8

●7-pin SOP7