Diodes AL9910 13W LED替代T8熒光管解決方案
Diodes 公司的AL9910/A是PWM高效高壓高亮LED驅(qū)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(qū)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(yīng)用在DC/DC或AC/DC LED驅(qū)動器,RGB背光LED驅(qū)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(yīng)用電路圖和帶與不帶無源PFC的典型應(yīng)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(yīng)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(yīng)用電路圖
圖3.AL9910/A帶無源PFC的典型應(yīng)用電路圖
采用AL9910高壓LED控制器的高功率系數(shù)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(qū)動器外形圖
圖5.高功率系數(shù)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
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