Infinoen ICE2QR0665 40W 20V离线开关电源解决方案.docx

Infinoen ICE2QR0665 40W 20V离线开关电源解决方案关键词：电源管理,AC/DC转换器,SMPS,?开关电源,?CoolSET,Infinoen公司的CoolSET?-Q1系列ICE2QR0665是准谐振的功率集成电路,集成了带起动单元的650V CoolMOS,能工作在非常低的负载,突发模式的待机功耗小于0.1W,内置了数字软起动,主要用在LCD监视器, DVD R/W, DVD,蓝光DVD,机顶盒等.本文介绍了ICE2QR0665产品亮点和主要特性, 方框图和典型应用电路以及40W/20V评估板主要指标,电路图和材料清单,PCB布局图.The CoolSET?-Q1 series (ICE2QRxx65) is the first generation of quasi-resonant integarted power ICs. It is optimized for off-line switch mode power supply applications such as LCD monitor, DVD R/W, DVD Combo, Blue-ray DVD, set top box, etc. Operting the MOSFET switch in quasi-resonant mode, lower EMI, higher efficiency and lower voltage stress on secondary diodes are expected for the SMPS. Based on the BiCMOS technology, the CoolSET?-Q1 series has a wide operation range (up to 25V) of IC power supply and lower power consumption. It also offers many advantages such as: a quasi-resonant operation till very low load increasing the average system efficiency compared to other conventional solutions; the Active Burst Mode operation enables an ultra-low power consumption at standby mode with small and controllable output voltage ripple.ICE2QR0665产品亮点:? Quasi resonant operation? Active Burst Mode to reach the lowest standby power requirement100mW@no load? Digital frequency reduction for better overall system efficiency? Integrated 650V startup cellICE2QR0665主要特性:? 650V avalanche rugged CoolMOS? with built-in startup cell? Quasiresonant operation till very low load? Active burst mode operation for low standby input power ( 0.1W)? Digital frequency reduction with decreasing load for reduced switching loss? Built-in digital soft-start? Foldback point correction and cycle-by-cycle peak current limitation? Maximum on/off time limitation? Auto restart mode for VCC Overvoltage and Undervoltage protections? Auto restart mode for overload protection? Auto restart mode for overtemperature protection? Latch-off mode for adjustable output overvoltage protection and transformer short-winding protection图1.ICE2