BW9910/A High Brightness LED Driver

© 2012 Bruckewell Technology Corp., Ltd.

1

www.bruckewell-semi.com/

Features



Efficiency > 90%





Constant current LED driver



Applications from a few mA to more than 1.0A



LED string from one to hundreds of diodes



PWM low-frequency dimming via PWM_D pin



Input voltage surge ratings up to 500V



Internal over temperature protection (OTP)



7.5V MOSFET drive – BW9910

10V MOSFET drive – BW9910A

Typical Applications



AC/DC or DC/DC LED Driver applications



RGB backlighting LED Driver



Backlighting of flat panel displays



General purpose constant current source



Signage and decorative LED lighting



Buck/Buck-Boost/Boost LED driver



T8/T9/T10 LED tubes



E26/E27 LED bulbs

Product Description

The BW9910/BW9910A is a PWM high-efficiency LED

driver control IC. It allows efficient operation of high

brightness (HB) LEDs from voltage sources ranging from

external MOSFET at fixed switching frequency up to

300kHz. The frequency can be programmed using a single

resistor. The LED string is driven at constant current rather

than constant voltage, thus providing constant light output

and enhanced reliability. The output current can be

programmed between a few mA and up to more than 1.0A.

The BW9910/BW9910A uses a rugged high voltage

junction isolated process that can withstand an input

voltage surge of up to 500V. Output current to an 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

BW9910/BW9910A. The BW9910/BW9910A 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 kHz.

The BW9910A allows wider range of external MOSFET

and SO8-EP packages.

Typical Application Circuit