1

FEATURES

APPLICATIONS

DESCRIPTION

Vtemp

Buck Converter

TPS65167

LDO Controller

BoostConverter

High-VoltageStress Test

Positive Charge Pump

GateVoltageShaping

Negative Charge Pump

Temperature Sensor

Vs

15V/1.7 A

12V

VGH

30V/50mA

VGL

–5V/150mA

Vlogic

3.3V/2.5 A

Vaux

1.8V/500 mA

TPS65167

TPS65167A

SLVS760B – APRIL 2007 – REVISED OCTOBER 2007

www.ti.com

Compact LCD Bias Supply for TFT-LCD TV Panels

• LCD TV Panel

2

• 6 V to 14 V Input Voltage Range

• LCD Monitor

• Vs Output Voltage Range up to 19 V

• Boost Converter With 3.5-A Switch Current

• Boost Converter Overvoltage Protection

The TPS65167 offers a compact power supply

• 2.5-A Step-Down Converter With 3.3-V Fixed or

solution to provide all voltages required by a LCD

Adjustable Output

panel

for

large

size

monitor

and

TV

panel

• 750 kHz Fixed Switching Frequency

applications running from a 12-V supply rail.

• 150 mA Negative Charge Pump Driver for VGL

The device generates all 3 voltage rails for the TFT

• 50 mA Positive Charge Pump for VGH

LCD bias (Vs, VGL and VGH). In addition to that it

includes a step-down converter and a LDO controller

• LDO Controller for Logic Supply

to provide two logic voltage rails. The device

• Gate Voltage Shaping for VGH

incorporates a high voltage switch that can be

• Temperature Sensor Output

controlled by a logic signal from the external timing

controller (TCON). This function allows gate voltage

• TPS65167 - High Voltage Stress Test Vs

shaping for VGH. The device also features a high

and VGH

voltage stress test where the output voltage of VGH

• TPS65167A - High Voltage Stress Test Vs only

is set to typically 30 V and the output voltage of Vs is

• Adjustable Sequencing

programmable to any higher voltage. The high

voltage stress test is enabled by pulling the HVS pin

• Gate Drive Signal for Isolation Switch

high. The device consists of a boost converter to

• Short-Circuit Protection

provide the source voltage Vs operating at a fixed

• Internal Soft-start

switching frequency of 750 kHz. A fully integrated

positive

charge

pump,

switching

automatically

• Thermal Shutdown

between doubler and tripler mode provides an

• Available in 6 × 6 mm 40 Pin QFN Package

adjustable regulated TFT gate on voltage VGH. A

negative charge pump driver provides adjustable

regulated output voltages VGL. To minimize external

components the charge pumps for VGH and VGL

operate at a fixed switching frequency of 1.5 MHz.

The device includes safety features like overvoltage

protection

of

the

boost

converter,

short-circuit

protection of VGH and VGL as well as thermal

shutdown.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.