TPS61193

FB

PWM

OUT1

OUT2

L1

D1

Up to 37 V

4.5...28 V

Up to 100 mA/string

SW

LDO

FSET

VIN

VDDIO/EN

PGND

GND

PAD

VIN

ISET

FAULT

VDDIO

FAULT

R1

R2

R3

BRIGHTNESS

SYNC

EN

OUT3

TPS61193

SNVSAF4 – OCTOBER 2015

www.ti.com

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

TheTPS61193 supports input voltage range from 4.5 V to 40 V. Device internal circuitry is powered from the

integrated LDO.

The TPS61193 uses a simple four-wire control:

•

VDDIO/EN for enable

•

PWM input for brightness control

•

SYNC pin for boost synchronisation (optional)

•

FAULT output to indicate fault condition (optional)

8.2 Typical Applications

8.2.1 Typical Application for LED Strings

Figure 18 shows the typical application for TPS61193 which supports 3 LED strings with maximum current 100

mA and boost switching frequency is 300 kHz.

Figure 18. Three Strings 100 mA/String Configuration

20

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