L1

68mH

D1

IFB1

ISNS

VIN

VDD

ISET

AGND

TPS61196

GDRV

FSW

C1

10mF

PWM2

VIN = 24V

OVP

R3

EN

R19

R6

C6

C5

PGND

COMP

FBP

R7

UVLO

PWM5

FAULT

R12

C3

1.0 F

m

R9

R11

REF

R1

R2

100mF

C7

IFBV

R10

C2

2.2mF

C9

200k

2.2mF

37.4k

196k

60.4k

0.1mF

Thermal pad

PWM6

PWM3

PWM4

PWM1

IFB2

IFB6

150k

47nF

C8

R4

Q1

160pF

C4

10nF

R8

3

0.1

470pF

200

255k

10k

EC2

EC1

100mF

182k

24.9k

IFB3

IFB4

IFB5

R13

10M

R14

10M

R15

10M

R16

10M

R17

10M

R18

10M

R5

200k

Product

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TPS61196-Q1

SNVSA79 – MARCH 2015

TPS61196-Q1 6-String 400-mA WLED Driver with

Independent PWM Dimming For Each String

The TPS61196-Q1 adjusts the boost controller's

1 Features

output voltage automatically to provide only the

1

•

8-V to 30-V Input Voltage

voltage required by the LED string with the largest

•

Up to 120-V Output Voltage

forward voltage drop plus the minimum required

voltage at that string's IFB pin, thereby optimizing

•

100-KHz to 800-kHz Programmable Switching

driver

efficiency.

Its

switching

frequency

is

Frequency

programmed by an external resistor from 100 kHz to

•

Adaptive Boost Output for LED Voltages

800 kHz.

•

Six Current Sinks, 200-mA Continuous Output,

The TPS61196-Q1 supports direct PWM brightness

400-mA Pulse Output for Each String

dimming. Each string has an independent PWM

•

±1.5% Current Matching Between Strings

control input. During the PWM dimming, the LED

•

High Precision PWM Dimming Resolution up to

current is turned on or turned off at the frequency and

duty cycle which are determined by the external

5000:1

PWM signal. The PWM frequency ranges from 90 Hz

•

Programmable OVP Threshold

to 22 kHz.

•

Programmable Input UVLO Threshold

The TPS61196-Q1 integrates overcurrent protection,

•

Adjustable Soft-Start Time

output short-circuit protection, ISET short-to-ground

•

Built-in LED Open and Short Protection

protection, diode open and short protection, LED

•

Built-in Schottky Diode Open and Short Protection

open and short protection, and overtemperature

shutdown circuit. In addition, the TPS61196-Q1 can

•

Built-in ISET Short Protection

detect the IFB pin short to ground to protect the LED

•

Built-in IFB Short Protection

string. The device also provides programmable input

•

Thermal Shutdown

undervoltage

lockout

threshold

and

output

overvoltage protection threshold.

2 Applications

Device Information(1)

•

Automotive LCD Backlighting

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Automotive Cluster Displays

TPS61196-Q1

HTSSOP (28)

9.70 mm x 4.40 mm

•

Automotive Secondary Displays

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

the end of the datasheet.

3 Description

The TPS61196-Q1 provides a highly integrated

Simplified Schematic

solution for automotive LCD backlighting with an

independent PWM dimming function for each string.

This device is a current mode boost controller driving

up to six WLED strings with multiple LEDs in series.

Each string has an independent current regulator

providing a LED current adjustable from 50 mA to

400 mA within ±1.5% matching accuracy. The

minimal voltage at the current sink is programmable

in the range of 0.3 V to 1 V to fit with different LED

current settings. The input voltage range for the

device is from 8 V to 30 V.

1

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.