Description
The Quasi-Resonant, ICE5QSAG is the 5th generation of quasiresonant controller optimized for off-line switch power supply in cascode configuration. The improved digital frequency reduction with proprietary novel Quasi-Resonant operation offers lower EMI and higher efficiency for wide AC range by reducing the switching frequency difference between low and high line. The enhanced active burst mode enables flexibility in standby power range selection. The product has a wide operating range (10~25.5 V) of IC power supply and lower power consumption. The numerous protection functions including the robust line protection (both input OVP and brownout) to support the protections of the power supply system in failure situations. All of these make the ICE5QSAG an outstanding controller for Quasi-Resonant flyback converter in the market.

Product Highlights
• Novel Quasi-resonant operation and proprietary implementation for low EMI
• Enhanced Active Burst Mode with selectable entry and exit standby power
• Active Burst Mode to reach the lowest standby power <100 mW
• Fast startup achieved with cascode configuration
• Digital frequency reduction for better overall system efficiency
• Robust line protection with input OVP and brownout
• Comprehensive protection
• Pb-free lead plating, halogen free mold compound, RoHS compliant

FEATUREs
• Minimum switching frequency difference between low & high
   line for higher efficiency & better EMI
• Enhanced Active Burst Mode with selectable entry and exit
   standby power
• Active Burst Mode to reach the lowest standby power <100 mW
• Fast startup achieved with cascode configuration
• Digital frequency reduction up to 10 zero crossings
• Built-in digital soft start
• Cycle-by-cycle peak current limitation
• Maximum on/off time limitation to avoid audible noise during
   start up and power down
• Robust line protection with input OVP and brownout
• Auto restart mode protection for VCC Over Voltage, VCC Under
   Voltage, Over load/Open Loop, Output Over Voltage, Over
   Temperature
• Limited charging current for VCC short to GND
• Pb-free lead plating, halogen free mold compound, RoHS
   compliant

APPLICATIONs
• Auxiliary power supply for Home Appliances/white Goods, TV,
   PC & Server
• Blu-ray player, Set-top box & LCD/LED Monitor