Infineon Technologies ICE2QS03G

Description

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 outputvoltage 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 quasiresonant flyback converter in the market.

Features

• 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
• Auto restart mode for VCC Over-voltage protection, VCC Under-voltage protection and open loop/over-loadprotection
• Latch-off mode for adjustable output over-voltage protection and short-winding protection

Typical applications

• Adapter/Charger
• LCD monitor, DVD R/W, DVD Combo, Blue-ray/DVD player, Set-top box,
• Auxiliary power supply for CRT TV, LCD TV, PC, Server, Printer, TV, Home theater/Audio System, etc.

More information

• Datasheet
• IC product information