1

FEATURES

APPLICATIONS

DESCRIPTION

TYPICAL APPLICATION

Boost

Converter

WithHVS

Buck

Converter

NegativeShunt

Regulator

InvertingBuckBoost

With

Temperature

Compensation

Sequencing

AndLogic

Positive

Charge

Pump

PowerGood

15V/2.9A

3.3V/2.4A

28V/150mA

-22to-11V/200mA

-7.5V/100mA

12 V

TPS65166

Compact LCD Bias Supply for TFT-LCD TV Panels

• LCD TV Panel with ASG Technology

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• 8.5V to 14.7V Input Voltage Range

• V

• Boost Converter with 4.2A Switch Current

The TPS65166 offers a compact power supply

• Step Down Converter with 2.6A Switch Current

solution to provide all voltages required by a LCD

and Adjustable Output 2.5V to 3.3V

panel for large TV panel applications running from a

• 750kHz Fixed Switching Frequency

12V supply rail. The device is optimized to support

• Temperature Compensated Negative Supply

LCD technology using ASG gate drive circuits.

• High Voltage Stress Test (HVS)

The device generates all voltage rails for the TFT

• Adjustable Sequencing

• Gate Drive Signal for Isolation Switch

logic voltage. By pulling the HVS pin high an

• Short Circuit Protection

implemented

high

voltage

stress

test

feature

• Internal Soft-Start

higher values. The boost converter operates at a

• 180° Phase Shift Between Buck and Boost

fixed switching frequency of 750kHz. The positive

• P2P Short/Open Certified

charge pump is running from the boost converter and

• Optimized Dual Layer PCB Layout

is regulated by an external transistor. A buck-boost

converter

provides

an

adjustable

temperature

• Low EMI

dependent

negative

output

voltage

• Undervoltage Lockout

• Thermal Shutdown

regulator.

• Available in 6×6mm 40 Pin QFN Package

Safety features like overvoltage protection of the

buck-boost input voltage, the boost and buck output

voltage, undervoltage lockout, short circuit protection

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 © 2009, 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.