原标题：ST STEVAL-ILL019V1 35W 4路HB RGGB LED驱动方案

　　ST 公司的STEVAL-ILL019V1是基于L6562A 的离线35W 4路HB RGGB LED驱动器，LED恒定电流350mA，交流输入电压88V-265VAC，每路可驱动5-13个LED，RGGB LED最大功率32W(宽输入电压)或42W(EU输入电压)，和EN55015 与EN61000-3-2兼容。本文介绍了L6562A主要特性，方框图，EVL6562A-TM-80W和EVL6562A-400W演示板的电路图，以及STEVAL-ILL019V1主要特性，方框图，高PF反激转换器电路图与四路可调整降压转换器和微控制器电路图，材料清单。

　　The 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

　　■ -600/+800mA totem pole gate driver with active pull-down during UVLO and voltage clamp DIP-8/SO-8 packages

　　L6562A应用：

　　PFC pre-regulators for:

　　■ IEC61000-3-2 compliant SMPS (Flat TV, monitors, desktop PC, games)

　　■ HI-END AC-DC adapter/charger up to 400W

　　■ Electronic ballast

　　■ Entry level server & web server

　　图1。L6562A方框图

　　图2。EVL6562A-TM-80W演示板电路图

　　图3。EVL6562A-400W演示板电路图

　　STEVAL-ILL019V1：基于L6562A 的离线35W 4路HB RGGB LED驱动器

　　The STEVAL-ILL019V1 demonstration board was developed to drive high brightness and power RGGB LEDs used in many different lighting applications. Thanks to RGGB LEDs, it is possible to easily modify the color of the light, change the brightness level, implement additional lighting features such as automatic color changes or a blinking mode, improve lighting efficiency compared to standard lighting products and finally also achieve significant energy savings. Typically, RGGB LED applications can be found as decorative lighting in houses or hotels, as architectural lighting in stadiums, historic buildings, bridges and monuments, as wall washing, shop lighting and in many other special lighting applications.

　　The STEVAL-ILL019V1 implements an innovative solution for driving multiple color RGGB LEDs, where high Power Factor, safety isolation and individual regulation of LED brightness are required. A constant current is set to 350 mA. Thanks to the microcontroller onboard, the output channels are independently controlled by four PWM signals, allowing the application users to set any color of the light or create automatic color effects.

　　STEVAL-ILL019V1主要特性：

　　■ Constant LED current: 350 mA

　　■ 4 channels for RGGB LEDs designed on the board

　　■ Line input voltage range: 88 V to 265 V AC

　　■ Load: 5 to 13 LEDs per each channel

　　■ 32 W maximum RGGB LED power (wide input voltage range)

　　■ 42 W maximum RGGB LED power (EU input voltage range)

　　■ Isolated SMPS

　　■ Individual regulation of RGGB brightness

　　■ EN55015 and EN61000-3-2 compliant

　　■ Double-sided PCB, 145 mm x 75 mm x 27 mm

　　图4。STEVAL-ILL019V1外形图

　　图5。STEVAL-ILL019V1方框图

　　图6。高PF反激转换器电路图

　　图7。四路可调整降压转换器和微控制器电路图

　　STEVAL-ILL019V1材料清单(BOM)：