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BW9910A 반도체 회로 부품 판매점

High Brightness LED Driver



Bruckewell Technology 로고
Bruckewell Technology
BW9910A 데이터시트, 핀배열, 회로
BW9910/A High Brightness LED Driver
Features
Efficiency > 90%
Universal rectified 85VAC to 265VAC 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
85VAC up to 265VAC. 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 RDS(ON) (drain-source on resistance) at
higher VGS. The BW9910/BW9910A is available in SOP-8
and SO8-EP packages.
Typical Application Circuit
© 2012 Bruckewell Technology Corp., Ltd.
1
www.bruckewell-semi.com/
http://www.Datasheet4U.com


BW9910A 데이터시트, 핀배열, 회로
BW9910/A High Brightness LED Driver
Pin Assignments and Ordering Information
Device
BW9910 MST
BW9910 MPT
BW9910A MST
BW9910A MPT
VCS Tolerance
±10%
±10%
±10%
±10%
Packaging
SOP-8
SO8-EP
SOP-8
SO8-EP
Quantity of Tape & Reel
3000
3000
3000
3000
Pin Descriptions
SOP-8 SO8-EP
11
22
33
44
55
66
77
88
N/A EP
Pin Name
Function
Input voltage pin.
VIN DC input supply voltage.
Current sensing input pin.
CS
Senses LED string current.
GND
Ground pin.
Device ground.
GATE
Gate driver output pin.
Drives the gate of the external MOSFET.
PWM_D
PWM dimming input pin.
Low frequency PWM dimming pin, also enable input. Internal 200kΩ pull-down
resistor to GND.
Internal/External supply voltage pin.
Internally regulated supply voltage. 7.5V nominal for the BW9910 and 10V
VDD nominal for the BW9910A. This pin can supply up to 1.0mA for external circuitry. A
sufficient storage capacitor is used to provide storage when the rectified AC input
is near the zero crossings.
Linear dimming input pin.
LD Linear dimming by changing the current limit threshold at current sensing
comparator.
ROSC
Oscillator control pin.
A resistor connected between this pin and GND sets the PWM frequency.
EP Pad Exposed pad.
Package bottom. Connect to GND directly underneath the package.
© 2012 Bruckewell Technology Corp., Ltd.
2
www.bruckewell-semi.com/




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BW9910A led

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BW9910

High Brightness LED Driver - Bruckewell Technology



BW9910A

High Brightness LED Driver - Bruckewell Technology