The ICE2QS03G is a quasi-resonant PWM Controller optimized for off-line switch power supply. The digital frequency reduction with decreasing load enables a quasi-resonant operation till very low load. As a result, the overall system efficiency is significantly improved compared to other conventional solutions. The active burst mode operation enables ultra-low power consumption at standby mode with small and controllable output voltage ripple. Based on the BiCMOS technology, the product has a wide operation range (up to 25V) of IC power supply and lower power consumption. The numerous protection functions give a full protection of the power supply system in failure situations. All of these make the ICE2QS03G an outstanding controller for quasi resonant flyback converter in the market.
Active burst mode for low standby power
Quasi resonant operation
Digital frequency reduction for better overall system efficiency
Quasi resonant operation till very low load
Active burst mode operation at light/no load for low standby input power (<100mW)
Digital frequency reduction with decreasing load
Startup cell for VCC pre-charging with constant current
Built-in digital soft-start
Foldback correction and cycle-by-cycle peak current limitation
Latch-off mode for adjustable output over-voltage protection and short-winding protection
