General Description

BD7679G is a PWM controller type DC/DC converter IC for AC/DC that provides an optimum system for all products that requires an electrical outlet. This product supports both isolated and non-isolated devices. IC enables simple design of low-power electrical converters. With switching MOSFET and current detection resistor as external devices, it enables more freedom in design.

Features

■ PWM frequency of 65kHz

■ PWM current mode method

■ Low circuit current when UVLO is ON

(12μA at VCC=12V)

■ Low circuit current without load

(Burst operation when load is light)

■ Built-in SW frequency hopping function

■ 250ns leading-edge blanking

■ VCC UVLO / OVP (Auto restart)

■ Per-cycle over current protection circuit

■ Soft start

■ Output overload protection(Auto-restart protection)

■ External stop function for COMP pin (Auto restart)

Applications

AC adapters and household appliances (vacuum cleaners,

humidifiers, air cleaners, air conditioners, refrigerators, IH

cooking heaters, rice cookers, etc.)