BW9910/A High Brightness LED Driver

© 2012 Bruckewell Technology Corp., Ltd.

2

www.bruckewell-semi.com/

Pin Assignments and Ordering Information

Device

Packaging

Quantity of Tape & Reel

BW9910 MST

±10%

SOP-8

3000

BW9910 MPT

±10%

SO8-EP

3000

BW9910A MST

±10%

SOP-8

3000

BW9910A MPT

±10%

SO8-EP

3000

Pin Descriptions

SOP-8

SO8-EP

Pin Name

Function

Input voltage pin.

1

1

DC input supply voltage.

Current sensing input pin.

2

2

CS

Senses LED string current.

Ground pin.

3

3

GND

Device ground.

Gate driver output pin.

4

4

GATE

Drives the gate of the external MOSFET.

PWM dimming input pin.

5

5

PWM_D

Low frequency PWM dimming pin, also enable input. Internal 200kΩ pull-down

resistor to GND.

Internal/External supply voltage pin.

6

6

Internally regulated supply voltage. 7.5V nominal for the BW9910 and 10V

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.

7

7

LD

Linear dimming by changing the current limit threshold at current sensing

comparator.

Oscillator control pin.

8

8

A resistor connected between this pin and GND sets the PWM frequency.

Exposed pad.

N/A

EP

EP Pad

Package bottom. Connect to GND directly underneath the package.