1、Infineon ICE2QS03G35W磚形適配器參考設計Infineon公司的ICE2QS03G是準諧振PWM控制器,采用有源突發模式可獲得低待機功耗(小于100mW),數字頻率降低以獲得較好系統效率,集成了500V起動單元,主要用在適配器/充電器,LCD監視器,機頂盒,輔助電源等.本文介紹了ICE2QS03G亮點和主要特性,框圖,應用電路圖以及采用ICE2QS03G, IPD60R600P6的35W磚形適配器參考設計板主要特性和指標,電路圖,材料清單,變壓器結構圖,PCB元件布局圖和PCB設計圖.ICE2QS03G is a quasi-resonant PWM controller o

2、ptimized 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 u

3、ltra-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

4、system in failure situations. All of these make the ICE2QS03G an outstanding controller for quasiresonantflyback converter in the market.ICE2QS03G產品亮點:Active burst mode for low standby powerQuasi resonant operationDigital frequency reduction for better overall system efficiencyIntegrated 500V startu

5、p cellPb-free lead plating, halogen free mold compound, RoHS compliantICE2QS03G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 wi

6、th 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-wind

7、ing protectionICE2QS03G應用: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.圖1.ICE2QS03G框圖圖2.ICE2QS03G應用電路圖采用ICE2QS03G, IPD60R600P6的35W磚形適配器參考設計板This application note is

8、 an engineering report of a very small form factor reference design for universal input 35W 19V adapter. The adapter is using ICE2QS03G, a second generation current mode control quasi-resonant flyback topology controller and IPD60R600P6, a seventh generation of high voltage power CoolMOS. The distin

9、guishing features of this reference design are very small form factor, best in class low standby power, high efficiency, good EMI performance and various modes of protection for high reliable system.This is a 35W 19.0V/1.84A USB adapter reference design using Quasiresonnant PWM IC ICE2QS03G, CoolMOS

10、  IPD60R600P6 (DPAK), small signal low voltage MOSFET 2N7002*2, and High Speed Switching Diode  BAS21-03W in a short brick form factor with peak power of 45W for 2 msec.35W磚形適配器參考設計板主要特性:Implemented 45W peak for 2msec (no V out dipping)AC ON/OFF Overshoot : 1% of nomina

11、l V outEfficiency > 87% Vin=100V Full Load with 0.11 cableInput Standby power <100mW no loadBenefits:Short Brick adapter enable portability and storageIntroduce DPAK into adapter designTarget Applications:Adapter35W磚形適配器參考設計板主要指標:圖3.35W磚形適配器參考設計板外形圖圖4.35W磚形適配器參考設計板電路圖圖5.35W磚形適配器參考設計板PCB元件布局圖(正面)圖6.35W磚形適配器參考