IR IRAC1152-350W PFC电源解决方案

IR公司的IRAC1152是固定频率66kHz的功率因素修正IC,采用IR公司的”一周期”控制技术,提供高的PFC和极好的DC总线调整,从而大大地降低元件数量,PCB面积和设计时间.通用85-264VAC输入电压,具有输入低压保护,过压保护,逐个周期的限流,开环保护,VCC UVLO,软起动和小于75uA的微功耗起动电流.本文介绍了R1152主要特性,方框图,应用电路以及采用R1152的350W电源参考计的主要特性指标,电路图,材料清单和PCB布局图.

IR1152S: FIXED 66kHz FREQUENCY, μPFC ONE CYCLE CONTROL PFC IC WITH BROWN-OUT PROTECTION

μPFC IR1152 power factor correction IC, based on IR proprietary "One Cycle Control" (OCC) technique, provides for high PF and excellent DC Bus regulation while enabling drastic reduction in component count, PCB area and design time as compared to traditional solutions. The IC is designed to operate in 85-264VAC universal input, continuous conduction mode Boost PFC at fixed 66kHz switching frequency.

IR1152 features include input-line sensed brown-out protection, overvoltage protection, cycle by cycle peak current limit, open loop protection, VCC UVLO, soft-start and micropower startup current of less than 75μA. In addition, for standby power requirements, the IC can be driven into a micropower sleep mode by pulling the OVP/EN pin low where the current consumption is less than 75uA. The IR1152 is available in SO-8 packages.

R1152主要特性:
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