LD7889中文资料LED 应用产品 : 升压型LED背光控制器/驱动器数据手册Leadtrend规格书

描述 Description

The LD7889 is a 4-channel linear current controller which combines with a boost switching controller. It’s an ideal solution for driving high power LED backlights. The LD7889 can deliver high accuracy of constant current to 4 LED strings with 4 internal MOSFET.For each LED string, the current is adjustable to drive up to 240mA.The LD7889 incorporates 4 individual current regulator channels to give accurate driving current for each LED string. The string-to-string tolerance is set within ±2%.PWM input pin controls LED brightness from PWM control signals.The other features include LED short and open protection, cycle by cycle current limit, and thermal shutdown.

特性 Features

·Input Voltage range: 4.5V to 36V
·Drives up to 4 strings in parallel, up to 240mA per string
·Time-shift PWM dimming control
·External PWM dimming control
·LED short circuit protection
·LED open string protection
·MOSFET over-current protection
·Over-temperature protection
·Status output

应用 Application

·UMPC and Notebook Computer Backlight
·Backlight for GPS, Portable DVD
·LED Backlight for LCD Monitor/ TV