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AV
DD
Boost Converter 1
V
IO1
Buck Converter 1
V
CORE
Buck Converter 2
V
GAM
Programmable
Gamma Voltages
Programmable
V + Buffers
COM
V
COM
V
IN
14
I C
2
V
GH
Boost Converter 2
2
V
GHM
Gate Voltage Shaping
V
GH
V
IO2
LDO Regulator
I C Interface
2
AV
DD
RST
Reset Generator
V
IO1
XAO
TPS65642
www.ti.com
SLVSBX6 –JULY 2013
LCD Bias with Integrated Gamma Reference for Notebook PCs, Tablet PCs and Monitors
Check for Samples: TPS65642
1 Introduction
1.1 Features
1
• 2.6 V to 6 V Input Voltage Range • Panel Discharge Signal (XAO)
• Synchronous Boost Converter (AV
DD
) • System Reset Signal (RST)
• Non-Synchronous Boost Converter with • 14-Channel, 10-Bit Programmable Gamma
Temperature Compensation (V
GH
) Voltage Correction
• Synchronous Buck Converter (V
CORE
) • On-Chip EEPROM with Write Protect
• Synchronous Buck Converter (V
IO1
) • I
2
C™ Interface
• Low Dropout Linear Regulator (V
IO2
) • Thermal Shutdown
• Programmable V
COM
Calibrator with Two • Supports GIP and Non-GIP Displays
Integrated Buffer Amplifiers
• 56-Ball, 3.16 mm x 3.45 mm 0.4 mm Pitch
• Gate Voltage Shaping DSBGA
1.2 Applications
• Notebook PCs
• Tablet PCs
• Monitors
1.3 Description
The TPS65642 is a compact LCD bias solution primarily intended for use in Notebook and Tablet PCs.
The device comprises two boost converters to supply the LCD panel's source driver and gate driver/level
shifter; two buck converters and an LDO linear regulator to supply the system's logic voltages; a
programmable V
COM
generator with two high-speed amplifiers; 14-channel gamma voltage correction; and
a gate voltage shaping function.
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.
PRODUCTION DATA information is current as of publication date. Products conform to
Copyright © 2013, Texas Instruments Incorporated
specifications per the terms of the Texas Instruments standard warranty. Production
processing does not necessarily include testing of all parameters.
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