標簽：LED 照明 光源

Diodes 公司的AL9910/A是PWM高效高壓高亮LED驅動器控制集成電路.源電壓從85VAC到256VAC,輸入電壓高達500V. AL9910能以固定頻率高達300kHz驅動外接MOSFET,輸出電流從幾毫安到大于1.0A,效率高于90%,主要應用在DC/DC或AC/DC LED驅動器,RGB背光LED驅動器,平板顯示器背光,通用恒流源以及裝飾LED照明.本文介紹了AL9910/A主要特性,功能方框圖, 典型應用電路圖和帶與不帶無源PFC的典型應用電路圖,以及15瓦LED替代T8熒光管的電路圖,材料清單和PCB布局圖.

AL9910/A主要特性和優(yōu)勢:

>90% Efficiency

Universal rectified 85 to 277VAC input range

Input voltage surge ratings up to 500V

Internal voltage regulator removes start-up resistor

o 7.5V MOSFET drive – AL9910

o 10V MOSFET drive – AL9910A

Constant-current LED driver

Applications from a few mA to more than 1A Output

PWM Low-Frequency Dimming via Enable pin

Internal Thermal Protection (OTP)

SO-8 and SO-8EP in “Green” Molding Compound (No Br, Sb)

Lead Free Finish/ RoHS Compliant

AL9910/A應用:

DC/DC or AC/DC LED Driver application

RGB Backlighting LED Driver

Back Lighting of Flat Panel Displays

General purpose constant current source

Signage and Decorative LED Lighting

圖1.AL9910/A功能方框圖

圖2.AL9910/A典型應用電路圖

圖3.AL9910/A帶無源PFC的典型應用電路圖

采用AL9910高壓LED控制器的高功率系數LED替代T8熒光管

This application note describes the principles and design equations required for the design of a high brightness LED lamp using the AL9910. The equations are then used to demonstrate the design of a universal, offline, high power factor (PF), 13W LED lamp suitable for use as the replacement for T8 fluorescent tube. A complete design including the electrical diagram, component list and performance measurements are provided.

圖4. LED替代T8熒光管驅動器外形圖

圖5.高功率系數15瓦LED燈電路圖

15瓦LED燈材料清單:

圖6.15瓦LED燈頂層和底層布局圖