TPS65642A Datasheet, PDF (1/77 Pages) Texas Instruments – LCD Bias With Integrated Gamma Reference for Notebook PCs, Tablet PCs and Monitors

TPS65642A
www.ti.com
SLVSC21 – OCTOBER 2013
LCD Bias With Integrated Gamma Reference for Notebook PCs, Tablet PCs and Monitors
Check for Samples: TPS65642A
1 Introduction
1.1 Features
123
• 2.6 V to 6 V Input Voltage Range
• Synchronous Boost Converter (AV_DD)
• Non-Synchronous Boost Converter With
Temperature Compensation (V_GH)
• Synchronous Buck Converter (V_CORE)
• Synchronous Buck Converter (V_IO1)
• Low Dropout Linear Regulator (V_IO2)
• Programmable V_COM Calibrator With Two
Integrated Buffer Amplifiers
• Gate Voltage Shaping
• Panel Discharge Signal (XAO)
• System Reset Signal (RST)
• 14-Channel, 10-Bit Programmable Gamma
Voltage Correction
• On-Chip EEPROM with Write Protect
• I²C™ Interface
• Thermal Shutdown
• Supports GIP and Non-GIP Displays
• 56-Ball, 3,16-mm × 3,45-mm 0,4-mm Pitch
DSBGA
1.2 Applications
• Notebook PCs
• Tablet PCs
• Monitors
1.3 Description
The TPS65642A device is a compact LCD bias solution primarily intended for use in notebook and tablet
PCs. The device comprises two boost converters to supply the source driver and gate driver, or level
shifter, of the LCD panel; two buck converters and a low-dropout (LDO) linear regulator to supply the
system logic voltages; a programmable V_COM generator with two high-speed amplifiers; 14-channel
gamma-voltage correction; and a gate-voltage shaping function.
V_IN
V_IO1
AV_DD
V_GH
2
IC
Boost Converter 1
Buck Converter 1
Buck Converter 2
LDO Regulator
Boost Converter 2
Reset Generator
Gate Voltage Shaping
Programmable
Gamma Voltages
Programmable
V_COM + Buffers
2
I C Interface
AV_DD
V_CORE
V_IO1
V_IO2
V_GH
RST
XAO
V_GHM
14
V_GAM
2
V_COM
1
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3
PRODUCTION DATA information is current as of publication date. Products conform to
specifications per the terms of the Texas Instruments standard warranty. Production
processing does not necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated