LT3003 3-Channel LED Ballaster with PWM

The LT3003 drives three separate strings of LEDs up to 350mA/channel with 3% accurate current matching, resulting in uniform LED brightness and intensity. This approach is superior to conventional methods of running three separate channels with external ballast resistors requiring expensive factory calibration.

The LT3003 operates in boost mode, “buck mode” and “buck-boost mode”. A True Color PWM Dimming ratio of up to 3000:1 is achievable using a logic-level signal at the PWM pin for all modes without the need for external level-shifting circuitry. For applications with input supply above and below the output voltage of the LED strings, the LT3003 allows the LEDs to be returned to the input supply (“buck-boost mode”) instead of being limited to only SEPIC solutions.

The LT3003 is ideal for high power LED driver applications such as TFT LCD backlighting and heads-up displays. Additional overtemperature outputs allow appropriate system management for increased reliability.

The LT3003 is available in a small 10-pin MSE package

产品特点 Features

3% LED Current Matching
Up to 350mA Continuous Current per LED String
Up to 3000:1 True Color PWMTM Dimming Range
PWM Input Disconnects LED Strings
Can Operate in Buck, Boost and Buck-Boost Modes
Wide Input Range: 3V to 40V
Overtemperature Outputs
Works with LT1618, LT3477, LT3474, LT3475, LT3476, LTC3783
Thermally Enhanced 10-Pin MSOP Package

参数

应用

High Power LED Ballaster
Automotive Lighting
Video Cameras
TFT LCD Backlighting

典型应用图

LT3003 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT3003EMSE	MSOP	10	E	$1.66	$1.16
LT3003EMSE#PBF	MSOP	10	E	$1.66	$1.16
LT3003EMSE#TR	MSOP	10	E		$1.22
LT3003EMSE#TRPBF	MSOP	10	E		$1.22

LT3003 数据手册及相关资料下载

数据手册(英文) : LT3003 - 3-Channel LED Ballaster with PWM.PDF
设计要点 (英文) : DN315 White LED Driver in Tiny SC70 Package Delivers High Efficiency and Uniform LED Brightness.PDF
可靠性数据 : R518 Reliability Data .PDF