65

70

75

80

85

90

95

100

0

20

40

60

80

100

Brightness (%)

VIN=5V

VIN=8V

VIN=12V

VIN=16V

C012

TPS61194-Q1

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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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-Q1

SNVSAN1 – AUGUST 2016

TPS61194-Q1 Low-EMI Automotive LED Driver With Four 100-mA Channels

1

1 Features

1

•

Qualified for Automotive Applications

•

AEC-Q100 Qualified With the Following Results:

–

Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

Range

•

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

Simplified Schematic

2 Applications

•

Backlight for:

–

Automotive Infotainment

–

Automotive Instrument Clusters

–

Smart Mirrors

–

Heads-Up Displays (HUD)

–

Central Information Displays (CID)

–

Audio-Video Navigation (AVN)

3 Description

The TPS61194-Q1 is an automotive high-efficiency,

low-EMI, easy-to-use LED driver with integrated DC-

DC converter. The DC-DC converter supports both

boost and SEPIC mode operation. The device has

four

high-precision

current

sinks

that

can

be

combined for higher current capability.

The DC-DC 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 the lowest

sufficient level in all conditions. For EMI reduction

DC-DC supports spread spectrum for switching

frequency and an external synchronization with

dedicated pin. A wide-range adjustable frequency

allows the TPS61194-Q1 to avoid disturbance for AM

radio band.

The input voltage range for the TPS61194-Q1 is from

4.5 V to 40 V to support automotive stop/start and

load dump condition. The TPS61194-Q1 integrates

extensive fault detection features.

To request a full data sheet or other design

resources: request TPS61194-Q1.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS61194-Q1

HTSSOP (20)

6.50 mm × 4.40 mm

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

the end of the data sheet.

System Efficiency