LD7889A

LD7889A 3/29/2012 4-Channel LED Backlight Driver REV: 00 General Description The LD7889A 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 LD7889A 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 LD7889A 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. 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 ...