www.ti.com

SW

8

OVP

7

GND

6

CTRL

5

LED

DRB PACKAGE

(TOP VIEW)

1

Exposed

Thermal

Die Pad

TPS61042

SLVS441B — DECEMBER 2002 — REVISED JANUARY 2003

NOTES:The exposed thermal die pad is connected to GND.

Terminal Functions

TERMINAL NAME NO.

I/O

DESCRIPTION

CTRL

5

I

Combined enable and PWM control pin. If CTRL is constantly pulled high, the device is enabled and the

internal LED switch (Q2) is constantly turned on. When CTRL is pulled to GND, the device is disabled.

Apply a PWM signal (100 Hz to 50 kHz) to this pin to control the brightness of the LEDs

FB

4

I

252 mV.

GND

6

GND

LED

1

I

Input of the LED switch (Q2). Connect the LEDs to this pin.

OVP

7

I

Overvoltage protection. OVP is connected to the output capacitor of the converter.

RS

2

O

Output of the internal LED switch. The sense resistor that programs the LED current is connected to RS.

SW

8

I

Drain of the integrated switch (Q1)

VIN

3

I

Input supply pin.

4