BW9910 Datasheet, PDF (1/14 Pages) Bruckewell Technology LTD – High Brightness LED Driver

BW9910/A High Brightness LED Driver
Features
 Efficiency > 90%
 Universal rectified 85V_AC to 265V_AC input range
 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
85V_AC up to 265V_AC. The BW9910/BW9910A controls an
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
which has lower R_DS(ON) (drain-source on resistance) at
higher V_GS. The BW9910/BW9910A is available in SOP-8
and SO8-EP packages.
Typical Application Circuit
© 2012 Bruckewell Technology Corp., Ltd.
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