Reference Design: Bipolar TFT LCD Supply Using TPS65131-Q1 and Charge Pumps

(ACTIVE) PMP9780

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Description

This reference design details a display power circuit which generates a bipolar voltage rail for source drivers and additional supplies for gate drivers. Charge pumps are used to generate the voltage supply for gate drivers, which makes this design easy to implement. By using only one dc-dc converter to generate four voltage rails and therefore minimizing the amount of inductances, this circuit allows small design size.

Features
  • Complete power supply solution for TFT LCD display bias
  • 4 output voltage rails
  • Low quiescent current less than 0.5 mA
  • Load regulation less than 2% on all rails
  • Automotive qualified components

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Schematic/Block Diagram

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Test Data

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Design Files

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Parametrics
 PMP9780.0
(Output Voltage 1)
PMP9780.1
(Output Voltage 2)
PMP9780.2
(Output Voltage 3)
PMP9780.3
(Output Voltage 4)
Vin (Min) (V)3.33.36.36.3
Vin (Max) (V)3.63.66.66.6
Vout (Nom) (V)6.3-6.315-10
Iout (Max) (A).1.1.02.02
Output Power (W).63.63.3.2
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDCDC
TopologyBoost- Non SyncBuck Boost- InvertingLinear RegulatorLinear Regulator

TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TLVH431A  1% accuracy low-voltage wide-operating current adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TPS65130  Split-Rail Converter with Dual, Positive and Negative Outputs (300mA typ)  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS65131  Split-Rail Converter with Dual, Positive and Negative Outputs (750mA typ)  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS65131-Q1  Automotive Split-Rail Converter with Dual, Positive and Negative Outputs (750mA typ)  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TLVH431A Download Download
Download Download
Download -
Download Download
Download Download
TPS65130 Download Download
TPS65131 Download Download
TPS65131-Q1 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date
PDF 500 07 May 2015
White papers (1)
Title Abstract Type Size (KB) Date
PDF 1311 21 Dec 2017
Design files (3)
Title Abstract Type Size (KB) Date
PDF 55 02 Jun 2017
PDF 24 22 Jun 2015
ZIP 44 18 Jun 2015

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