FEATURES

>9 0 efficiency

10V to 600V input range

Constant current LED driver

Applications from a few mA to more than 1A

output

LED string from one to hundreds of diodes

Linear and PWM dimming capability

Input voltage surge ratings up to 600V

Available in SOP8 Package

DESCRIPTION

The A9910 is a PWM high-efficiency LED driver control IC. It allows efficient operation of high-brightness (HB) LEDs from voltage sources ranging from 10VDC up to 600VDC. The A9910 controls an external MOSFET at fixed switching frequencies up to 300kHz. The frequency can be programmed using a single resistor. The LED string is driven at a constant current rather than a constant voltage, thus providing a constant light output and an enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A. The A9910 uses a rugged high-voltage junction isolated process that can withstand an input voltage surge up to 600V. The output current to a LED string can be programmed to any value between zero and its maximum value by applying an external control voltage at the linear dimming control input of the A9910. The A9910 provides a low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100 and a frequency of up to a few kilohertz.

The A9910 is available in SOP8 package.

APPLICATION

DC /DC or AC/DC LED driver applications

RGB backlighting LED driver

Backlighting of flat panel displays

General purpose constant current source

Signage and decorative LED lighting

Automotive

Chargers