AL9910A-5数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The AL9910/A high voltage PWM LED driver-controller provides an efficient solution for offline high brightness LED lamps from rectified line voltages ranging from 85VAC up to 277VAC. The AL9910 drives external MOSFETs at switching frequencies up to 300kHz, with the switching frequency determined by a single resistor. The AL9910 topology creates a constant current through the LEDs providing constant light output. The output current is programmed by one external resistor and is ultimately determined by the external MOSFET chosen and therefore allows many low current LEDs to be driven as well as a few high current LEDs. 

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\tThe LED brightness can be varied by both Linear and PWM dimming using the AL9910’s LD and PWM_D pins respectively. The PWM_D input operates with duty ratio of 0-100% and frequency of up to several kHz. 

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\tThe AL9910 can withstand input voltages up to 500V which makes it very resilient to transients at standard mains voltages. As well as standard SO-8 package the AL9910 is available in the thermally enhanced SO-8EP package.

特性 Features

>90% Efficiency 
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\t\tUniversal Rectified 85 to 277VAC Input Range 
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\t\tInput Voltage Up to 500V
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\t\tInternal Voltage Regulator Removes Start-Up Resistor
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\t\t\t\tƒ 7.5V MOSFET Drive – AL9910
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\t\t\t\tƒ 10V MOSFET Drive – AL9910A
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\t\tTighter Current Sense Tolerance: 5% AL9910-5, AL9910A-5 
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\t\tDrives LED Lamps with Both High and Low Current LEDs 
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\t\tLED Brightness Control with Linear and PWM Dimming 
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\t\tInternal Thermal Protection (OTP) 
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\t\tAvailable in SO-8 and SO-8EP Packages 
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\t\tTotally Lead-Free & Fully RoHS Compliant 
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\t\tHalogen and Antimony Free. “Green” Device

应用 Application

LED Offline Lamps 
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\t\tHigh Voltage DC-DC LED Driver 
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\t\tSignage and Decorative LED Lighting 
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\t\tBack Lighting of Flat Panel Displays 
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\t\tGeneral Purpose Constant Current Source