IC LED driver A8515 series

backlightingPWMWLED

The A8515 is a multi-output white LED (WLED) driver for LCD backlighting in consumer and industrial displays. It integrates a current-mode boost converter with an internal power DMOS switch and two current sinks. The boost converter can drive up to 24 LEDs: 12 LEDs per string at 120 mA. The LED sinks can be paralleled together to achieve higher LED currents, up to 240 mA. The A8515 can operate from a single power supply, from 5 to 40 V. PWM dimming is implemented with an external PWM input signal. The PWM dimming pin is used to control the LED intensity by using pulse width modulation. The low, 720 mV regulation voltage on the LED current sources reduces power loss and improves efficiency. Applications include: Desktop LCD flat panel displays (FPD) Flat panel video displays LCD TVs and monitors The A8515 is provided in a 16-pin TSSOP package (suffix LP) with an exposed thermal pad. It is lead (Pb) free, with 100% matte tin leadframe plating.