TPS61194

FB

PWM

OUT1

OUT2

OUT3

L1

D1

Up to 100 mA/string

SW

LDO

FSET

VDDIO/EN

SYNC

PGND

GND

PAD

VIN

ISET

FAULT

EN

BRIGHTNESS

OUT4

R1

R2

Copyright © 2016, Texas Instruments Incorporated

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20

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60

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100

Brightness (%)

VIN=5V

VIN=8V

VIN=12V

VIN=16V

C012

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS61194

SNVSAN0 – AUGUST 2016

TPS61194 High-Performance Four-Channel LED Driver

1

1 Features

1

•

Input Voltage Operating Range 4.5 V to 40 V

•

Four High-Precision Current Sinks

–

Current Matching 1% (Typical)

–

LED String Current up to 100 mA per Channel

–

Outputs can be Combined Externally for

Higher Current per String

•

High Dimming Ratio of 10 000:1 at 100 Hz

•

Integrated Boost/SEPIC Converter for LED String

Power

–

Output Voltage up to 45 V

–

Switching Frequency 300 kHz to 2.2 MHz

–

Switching Synchronization Input

–

Spread Spectrum for Lower EMI

•

Extensive Fault Detection Features

–

Fault Output

–

Input Voltage OVP and UVLO

–

Open and Shorted LED Fault Detection

–

Thermal Shutdown

•

Minimum Number of External Components

2 Applications

•

Industrial Backlighting Systems in Control Panels

•

Test and Measurement Equipment

3 Description

The TPS61194 is a high-efficiency, low-EMI, easy-to-

use LED driver with flexibility to support a wide range

of applications. It has four high-precision current sinks

that can be combined for higher current capability.

The TPS61194 has an integrated DC-DC supporting

both boost and SEPIC mode operation. The converter

has adaptive output voltage control based on the LED

current

sink

headroom

voltages.

This

feature

minimizes the power consumption by adjusting the

voltage to lowest sufficient level in all conditions. For

EMI control the DC-DC converter supports spread

spectrum for switching frequency and an external

synchronization with dedicated pin.

The TPS61194 has wide input voltage range from

4.5 V to 40 V for robust support of different types of

applications. The TPS61194 integrates extensive

fault detection features. The device supports PWM

brightness dimming ratio of 10 000:1 for 100-Hz input

PWM frequency.

To request a full data sheet or other design

resources: request TPS61194.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS61194

HTSSOP (20)

6.50 mm × 4.40 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

System Efficiency