IR IRS2548D 40V-1.4A 带PFC LED驱动解决方案
IR公司的IRS2548D是带PFC LED驱动器和半桥控制器,是全集成全保护的600V LED或开关电源(SMPS)控制集成电路,把PFC,系统控制和半桥驱动器集成在一起,可编程PFC过流保护,微功耗250uA起动,可变频率振荡器,主要用在隔离的LED驱动器和开关电源.本文介绍了IRS2548D主要特性,方框图, PFC控制电路框图和典型应用电路图以及40V/1.4A低压LED驱动器参考设计电路图,电感元件指标和材料清单.
IRS2548D: SMPS/LED DRIVER PFC + HALF-BRIDGE CONTROL IC
The IRS2548D is a fully integrated, fully protected 600V LED or switched mode power supply control IC with integrated PFC control for a Boost pre-regulator. The IRS2548D is based on the popular IRS2168D electronic ballast control IC re-designed for use in LED driver or half-bridge power supply applications. The PFC circuitry operates in critical conduction mode and provides high PF, low THD and DC bus regulation. The IRS2548D features include programmable minimum run frequency and adjustable oscillator frequency that can be driven by an opto isolator or other feedback circuit in a feedback loop for frequency modulation in resonant systems. The IRS2548D also includes PFC over-voltage and over-current protection, half bridge over current protection and a logic level enable input that can be used for PWM dimming in LED drivers or general burst mode operation.
IRS2548D主要特性:
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