Infineon ICE2QS03G35W砖形适配器参考设计

Infineon公司的ICE2QS03G是准谐振PWM控制器,采用有源突发模式可获得低待机功耗(小于100mW),数字频率降低以获得较好系统效率,集成了500V起动单元,主要用在适配器/充电器,LCD监视器,机顶盒,辅助电源等.本文介绍了ICE2QS03G亮点和主要特性,框图,应用电路图以及采用ICE2QS03G, IPD60R600P6的35W砖形适配器参考设计板主要特性和指标,电路图,材料清单,变压器结构图,PCB元件布局图和PCB设计图.
ICE2QS03G is a quasi-resonant PWM controller optimized for off-line switch power supply. The digitalfrequency reduction with decreasing load enables a quasi-resonant operation till very low load. As a result, theoverall system efficiency is significantly improved compared to other conventional solutions. The active burstmode 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 ICpower supply and lower power consumption. The numerous protection functions give a full protection of thepower supply system in failure situations. All of these make the ICE2QS03G an outstanding controller for quasiresonantflyback converter in the market.
ICE2QS03G产品亮点:

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
ICE2QS03G主要特性:

• 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
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