PMP9780

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

PMP9780

Design files

Overview

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
Output voltage options PMP9780.0 PMP9780.1 PMP9780.2 PMP9780.3
Vin (Min) (V) 3.3 3.3 6.3 6.3
Vin (Max) (V) 3.6 3.6 6.6 6.6
Vout (Nom) (V) 6.3 -6.3 15 -10
Iout (Max) (A) .1 .1 .02 .02
Output Power (W) .63 .63 .3 .2
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC DC
Topology Boost- Non Sync Buck Boost- Inverting Linear Regulator Linear Regulator
Personal electronics

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU978.PDF (569 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRFD8A.PDF (55 K)

Detailed schematic diagram for design layout and components

TIDRFD9.PDF (24 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDCAH1.ZIP (44 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

LCD & OLED display power & drivers

TPS65130Split-Rail Converter with Dual, Positive and Negative Outputs (300mA typ)

Data sheet document-pdfAcrobat PDF open-in-new HTML
LCD & OLED display power & drivers

TPS65131Split-Rail Converter with Dual, Positive and Negative Outputs (750mA typ)

Data sheet document-pdfAcrobat PDF open-in-new HTML
LCD & OLED display power & drivers

TPS65131-Q1Automotive Split-Rail Converter with Dual, Positive and Negative Outputs (750mA typ)

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TLVH431A1% low-voltage wide-operating current adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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View all 3
Type Title Date
White paper Powering automotive displays to create interactive driving experiences Dec. 21, 2017
Technical article Split-rail converters reduce BOM size and cost in new automotive displays Jul. 01, 2015
Test report Bipolar TFT LCD Supply Using TPS65131-Q1 and Charge Pumps Design Guide May 07, 2015

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