ICE2QS03G_14 Datasheet, PDF (6/24 Pages) Infineon Technologies AG – Active burst mode for low standby power

Quasi-Resonant PWM controller
ICE2QS03G
Off-Line SMPS Quasi-Resonant PWM Controller with integrated 500V
startup cell in DSO8
Product Highlights
 Active burst mode for low standby power
 Quasi resonant operation
 Digital frequency reduction for better overall system efficiency
 Integrated 500V startup cell
 Pb-free lead plating, halogen free mold compound, RoHS compliant
PG-DSO-8
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-load
protection
• Latch-off mode for adjustable output over-voltage protection and short-winding protection
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 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.
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.
Figure 1 Typical Application
Type
ICE2QS03G
Data Sheet
Package
PG-DSO-8
6
Marking
2QS03G
V2.3, 2014-03-06