ST STEVAL-ILL013V1 80W离线LED驱动方案.docx

ST STEVAL-ILL013V1 80W离线LED驱动方案关键词：/search/?q=%B5%E7%D4%B4%B9%DC%C0%ED电源管理,/search/?q=AC%2FDC%D7%AA%BB%BB%C6%F7AC/DC转换器,/search/?q=LED%C7%FD%B6%AF%C6%F7LED驱动器,/search/?q=PFCPFC,ST公司的STEVAL-ILL013V1是采用L6562A的80W离线LED驱动器,LED电流可设定为350mA,700mA和1A,效率约90%,输入电压88V到265VAC,110VAC适得其反功率因素为0.99,230VAC为0.98V,通用的PWM调光输入,亮度调整在0%到100%之间,和EN55015与EN61000-3-2兼容.本文介绍了L6562A主要特性,方框图,以及80W LED驱动演示板STEVAL-ILL013V1主要特性,框图,改进型设计电路和材料清单.L6562A: Transition-mode PFC controllerThe L6562A is a current-mode PFC controller operating in Transition Mode (TM). Coming with the same pin-out as its predecessors L6561 and L6562, it offers improved performance.The highly linear multiplier includes a special circuit, able to reduce AC input current distortion,that allows wide-range-mains operation with an extremely low THD, even over a large load range.The output voltage is controlled by means of a voltage-mode error amplifier and an accurate (1% @TJ = 25℃) internal voltage reference.The device features extremely low consumption (60μA max. before start-up and 5 mA operating) and includes a disable function suitable for IC remote ON/OFF, which makes it easier to comply with energy saving requirements (Blue Angel, EnergyStar, Energy2000,etc.).An effective two-step OVP enables to safely handle overvoltages either occurring at start-up or resulting from load disconnection.The totem-pole output stage, capable of 600 mA source and 800 mA sink current, is suitable to drive high current MOSFETs or IGBTs. This, combined with the other features and the possibility to operate with the proprietary Fixed-Off-Time control, makes the device an excellent low-cost solution for EN61000-3-2 compliant SMPS in excess of 350W.L6562A主要特性:■ Proprietary multiplier design for minimum THD■ Very accurate adjustable output overvoltage protection■ Ultra-low (30μA) Start-up current■ Low (2.5mA) quiescent current■ Digital leading-edge blanking on current sense■ Disable function on E/A input■ 1% (@ TJ = 25 ℃) internal reference voltage■