TS19371

Boost (Step-up) WLED Driver with OVP

3/10

Version: G08

Functional Block

Pin Description

Pin

(SOT-26)

Pin

(SOP-8)

Function

Description

1

8

SW

Switching Pin. This is the collector of the internal NPN power switch.

Connect to inductor and diode. Minimize the metal trace area

connected to this pin to reduce EMI.

2

2,3,6,7

Ground

Ground Pin. Connect directly to local ground plane.

3

5

FB

Feedback Pin. Reference voltage is 95mV. Connect LEDs and a

resistor at this pin. LED current is determined by the resistance and

CTRL voltage.

4

4

CTRL

Shutdown Pin and Dimming Control Pin.

VCTRL > 1.8V generates full-scale LED current

VCTRL < 0.4V chip is off

Switching from 04V to 2.0V, PWM duty cycle controls the LED current

5

OVP

Over Voltage Protection, 30V

6

1

VIN

Input Supply Pin. Bypass this pin with a capacitor as close to the

device as possible