TS19371

Boost (Step-up) WLED Driver with OVP

3/8

Version: F08

Functional Block

Pin Description

Pin

Function

Description

1

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

Ground

Ground Pin. Connect directly to local ground plane.

3

Feedback

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

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

Input

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