4 Channel High Current LED Driver with Adaptable Power Control

The ADP8140 provides high current control of up to four LED drivers. Each driver can sink up to 500 mA. The sink current is programmed for all four drivers with one external resistor.

The device features a feedback output that controls an external power supply for optimal efficiency. The ADP8140 also protects the LEDs, power supply, and itself against thermal events, short circuits, overvoltages, and LED open circuits. Multiple ADP8140 ICs are easily connected in parallel to drive additional LED strings or higher current LEDs. The ADP8140 is available in a small, thermally enhanced, lead frame chip scale package (LFCSP).

Applications

* High brightness LED lighting

* Large format LED backlighting

* Highly integrated feature set for a high brightness LED driver solution with minimal external components

* 4 current sink channels with an adjustable current from

* 125 μA to 500 mA

* Analog and pulse-width modulation (PWM) dimming inputs

* Analog and PWM LED current outputs

* 2% (maximum) matching between LED channels

* 5% (maximum) LED current accuracy

* Operates from VIN of 3 V to 30 V; higher voltages easily accomplished with an external Zener diode

* Operates with LED anode supply voltages up to 100 V dc

* Feedback output controls external power source for optimal efficiency and safety

* Multiple ADP8140 IC operation in parallel to control one power supply