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Product details

Parameters

Display type LCD Bipolar IC integration LCD Bias Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Source driver voltage (Min) (V) -15 Source driver voltage (Max) (V) 15 Level shifter/scan driver (ch) 0 V_POS (Min) (V) 3.2 V_POS (Max) (V) 15 V_NEG (Min) (V) -15 V_NEG (Max) (V) -2 Special function Adjustable Sequencing Topology Split-Rail Rating Automotive open-in-new Find other LCD & OLED display power & drivers

Package | Pins | Size

VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other LCD & OLED display power & drivers

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Test Guidance With the Following Results:
    • Device Temperature Grade 2: –40°C to 105°C Ambient Operating Temperature Range
    • Electrical Characteristics Tested Over –40°C to 125°C Junction Temperature Range
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C4B
  • Dual Adjustable Output Voltages up to 15 V and down to –15 V
  • 2–A Typical Switch-Current Limit for Boost and Inverter Main Switches
  • High Conversion Efficiency
    • Up to 91% at Positive Output Rail
    • Up to 85% at Negative Output Rail
    • Power-Save Mode at Low Load
  • Independent Enable Inputs for Power-Up and Power-Down Sequencing
  • Control Output for External PFET to Support Complete Supply Disconnect When Shut Down
  • 2.7-V to 5.5-V Input-Voltage Range
  • Minimum 1.25-MHz Fixed-Frequency PWM Operation
  • Thermal Shutdown
  • Overvoltage Protection on Both Outputs
  • 0.2-µA Typical Shutdown Current
  • Small 4-mm × 4-mm QFN-24 Package (RGE)

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Description

The TPS65131-Q1 device is dual-output dc-dc converter generating a positive output voltage up to 15 V and a negative output voltage down to –15 V with output currents of typically 200 mA, depending on input-voltage to output-voltage ratio. With a total efficiency up to 85%, the device is ideal for portable battery-powered equipment. The input-voltage range of 2.7 V to 5.5 V allows, for example, 3.3-V and 5-V rails to power the TPS65131-Q1 device. The TPS65131-Q1 device comes in a QFN-24 package with thermal pad. Requiring few and small external components, the overall solution size can be small.

The converter operates with a fixed-frequency PWM control topology and, with power-save mode enabled, uses a pulse-skipping mode at light load currents. In operation, the typical overall device quiescent current is only 500 µA. In shutdown, the device draws typically 0.2 µA. Independent enable pins allow power-up and power-down sequencing for both outputs. The device has an internal current limit, overvoltage protection, and a thermal shutdown for highest reliability under fault conditions.

The TPS65131-Q1 device is qualified for automotive applications, according to AEC-Q100 temperature grade 2. The electrical characteristics are tested over –40°C to 125°C device junction temperature. This, combined with lowest shutdown currents, small solution size, package with thermal pad, plus good efficiency and protection features, targets automotive and industrial applications.

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TPS65100-Q1 ACTIVE Automotive 2.7V to 5.8V LCD Supply with Boost Converter, Dual Charge Pump, and LDO Controller This product is an LCD supply with integrated VGH, VGL, Vcom, LDO and works with displays requiring +AVDD (instead of +/-AVDD).
TPS65150-Q1 ACTIVE Automotive, compact LCD bias Power Supply with integrated VCOM Buffer This product uses +AVDD (instead of +/-AVDD), and integrates VGH, VGL, and Vcom.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS65131-Q1 Positive- and Negative-Output DC-DC Converter datasheet (Rev. E) Feb. 08, 2017
Application notes Understanding Undervoltage Lockout in Power Devices (Rev. A) Sep. 19, 2018
White papers Powering automotive displays to create interactive driving experiences Dec. 21, 2017
Application notes Basic calculation of an inverting buck-boost power stage (Rev. A) Aug. 28, 2017
Technical articles Split-rail converters reduce BOM size and cost in new automotive displays Jul. 01, 2015
Application notes Basic Calculation of a Boost Converter's Power Stage (Rev. C) Jan. 08, 2014
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013
User guides TPS65131EVM User's Guide (Rev. C) Nov. 23, 2010
Application notes Minimizing Ringing at the Switch Node of a Boost Converter Sep. 15, 2006

Design & development

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Reference designs

REFERENCE DESIGNS Download
Reference Design: Bipolar TFT LCD Supply Using TPS65131-Q1 and Charge Pumps
PMP9780 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 (...)
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VQFN (RGE) 24 View options

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