GENERAL DESCRIPTION

The ML 4802 is a controller for power factor corrected, switched mode power supplies that offers Green Mode operation and reduced start-up and operating currents. Green Mode is an efficiency improving circuit feature which operates automatically in low power situations. This feature helps meet the demands of Energy Star™ programs.

FEATURES

■ Internally synchronized PFC and PWM in one IC

■ Green Mode maximizes efficiency during low power standby operation

■ Low supply current (Start-up 200µA typ., operating 5.5mA typ.)

■ Average current continuous boost leading edge PFC

■ High efficiency trailing edge PWM can be configured for current mode operation

■ Reduced ripple current in the storage capacitor between the PFC and PWM sections

■ PFC overvoltage comparator eliminates output “runaway” due to load removal

■ Current fed gain modulator for improved noise immunity

■ Overvoltage protection, UVLO, and soft start