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
• Synchronous Boost Converter (AVDD
• Panel Discharge Signal (XAO)
• System Reset Signal (RST)
)
• Non-Synchronous Boost Converter with
Temperature Compensation (VGH
• Synchronous Buck Converter (VCORE
• Synchronous Buck Converter (VIO1
• Low Dropout Linear Regulator (VIO2
• 14-Channel, 10-Bit Programmable Gamma
Voltage Correction
• On-Chip EEPROM with Write Protect
• I2C™ Interface
)
)
)
)
• Thermal Shutdown
• Programmable VCOM Calibrator with Two
Integrated Buffer Amplifiers
• Gate Voltage Shaping
• Supports GIP and Non-GIP Displays
• 56-Ball, 3.16 mm x 3.45 mm 0.4 mm Pitch
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 VCOM generator with two high-speed amplifiers; 14-channel gamma voltage correction; and
a gate voltage shaping function.
VIN
Boost Converter 1
Buck Converter 1
Buck Converter 2
LDO Regulator
AVDD
VCORE
VIO1
VIO1
VIO2
AVDD
VGH
Boost Converter 2
Reset Generator
RST
XAO
VGH
Gate Voltage Shaping
VGHM
VGAM
VCOM
Programmable
Gamma Voltages
14
2
Programmable
VCOM + Buffers
I2C
I2C Interface
1
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