Description

ICE2QS01 is a quasi-resonant PWM controller optimized for off-line switch power supply applications such as LCD TV, CRT TV and notebook adapter. The digital frequency reduction with decreasing load enables a quasi-resonant operation till very low load.

Features

• Quasiresonant operation till very low load

• Active burst mode operation at light load for low standby input power (< 1W)

• Digital frequency reduction with decreasing load

• Power cell for VCC pre-charging and IC power supply during latch-off, or standby mode operation when it is necessary

• Built-in digital soft-start

• Foldback correction and cycle-by-cycle peak current limitation

• Auto restart mode for VCC Overvoltage protection

• Auto restart mode for VCC Undervoltage protection

• Auto restart mode for openloop/overload protection

• Latch-off mode for adjustable output overvoltage protection

• Latch-off mode for Short-winding protection