IR IRS2500 80W PFC开关电源解决方案

IR公司的IRS2500是全集成全保护的PFC开关电源控制器,具有升压或反激转换器模式.器件中的PFC电路在各种线路/负载范围内提供高PF,低THD和稳定的DC总线调整,具有逐个周期的过流和输出过压保护,主要用在开关电源,电子镇流器和LED驱动器.本文介绍了IRS2500主要特性, 功能框图, 典型应用电路以及PFC预调整电路图, 80W PFC电路图
及其材料清单.
The IRS2500 is a fully integrated, fully protected PFC SMPS control IC designed to drive Boost or Flyback switching regulators providing high power factor. Typical applications are PFC pre-regulators for SMPS and electronic ballasts for fluorescent or HID lighting as well as single stage Flyback converters widely used in low power LED drivers. The IRS2500 is pin compatible with most industry standard critical counduction or transition mode PFC control IC with additional improvements to increase performance. The PFC circuitry provides high PF, low THD and stable DC bus regulation over a wide line/load range. The IRS2500 protection features include cycle by cycle over-current protection and output over voltage protection.
IRS2500主要特性:
• PFC Control IC
• Boost or Flyback Converter Modes
• Critical-conduction / Transition mode operation
• Over-current protection
• Static and Dynamic DC bus overvoltage protection
• Micropower startup (<50μA)
• Low quiescent current (2.5mA)
• Latch immunity and ESD protection
• Wide range PFC for universal AC line input
• Low THD
• Open load Over voltage protection
• Noise immunity
IRS2500典型应用:
• Switched Mode Power Supplies
• Electronic Ballasts
• LED Drivers

图1.IRS2500功能框图

图2.IRS2500典型应用电路
Many offline applications require power factor correction circuitry in order to minimize transmission line losses and stress on electrical generators and transformers created by high harmonic content and phase shift. Appliances often incorporate switching po...