TPS65100-Q1 Datasheet, PDF (1/27 Pages) Texas Instruments – TRIPLE-OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER

TPS65100-Q1
www.ti.com
SLVS849A – JULY 2008 – REVISED APRIL 2012
TRIPLE-OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER
Check for Samples: TPS65100-Q1
FEATURES
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•23 Qualified for Automotive Applications
• 2.7-V to 5.8-V Input Voltage Range
• 1.6-MHz Fixed Switching Frequency
• Three Independently Adjustable Outputs
• Main Output of up to 15 V With < 1% Output
Voltage Accuracy
• Virtual Synchronous Converter Technology
• Negative Regulated Charge Pump Driver V_O2
• Positive Charge Pump Converter V_O3
• Integrated VCOM Buffer
• Auxiliary 3.3-V Linear Regulator Controller
• Internal Soft Start
• Internal Power-On Sequencing
• Fault Detection of all Outputs
• Thermal Shutdown
• Available in TSSOP-24 PowerPAD™ Package
APPLICATIONS
• TFT LCD Displays for Notebooks
• TFT LCD Displays for Monitors
• Portable DVD Players
• Tablet PCs
• Car Navigation Systems
• Industrial Displays
DESCRIPTION
The TPS65100 offers a compact and small power
supply solution that provides all three voltages
required by thin-film transistor (TFT) LCD displays.
The auxiliary linear regulator controller can be used
to generate a 3.3-V logic power rail for systems
powered by a 5-V supply rail only.
The main output, V_O1, is a 1.6-MHz fixed-frequency
PWM boost converter providing the source-drive
voltage for the LCD display. The TPS65100 has a
typical switch current limit of 2.3 A. A fully integrated
adjustable charge pump doubler/tripler provides the
positive LCD gate-drive voltage. An externally
adjustable negative charge pump provides the
negative gate-drive voltage. Due to the high 1.6-MHz
switching frequency of the charge pumps,
inexpensive and small 220-nF capacitors can be
used.
The TPS65100 has an integrated VCOM buffer to
power the LCD backplane. For LCD panels powered
by 5 V only, the TPS65100 has a linear regulator
controller using an external transistor to provide a
regulated 3.3-V output for the digital circuits. For
maximum safety, the TPS65100 goes into shutdown
as soon as one of the outputs is out of regulation.
The device can be enabled again by toggling the
input or the enable (EN) pin to GND.
VIN
2.7 V to 5.8 V
Boost
Converter
Positive Charge
Pump
Negative
Charge Pump
VCOM Buffer
Linear Regulator
Controller
V_O1
Up to 15 V / 400 mA
V_O3
Up to 30 V / 20 mA
V_O2
Up to 12 V / 20 mA
VCOM
V_O4
3.3 V
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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.
PowerPAD is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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 © 2008–2012, Texas Instruments Incorporated