Automotive cluster and display power reference design with warm/cold-crank capability
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Key Document


This reference design provides the system rails for automotive HUD, center information display, cluster display, or other automotive displays. A 3.3-V bus is generated by an off-battery buck converter. A boost converter provides 3.3-V to 5-V conversion and a buck provides 1.8 V from the 3.3-V rail. Display panel, CAN bus, microcontroller (MCU), FPD-Link, touch controller and switch packs are all examples of what can be driven by the power rails in this design. EMI filtering and reverse battery protection are included.

  • Hardware tested automotive infotainment display unit power tree passing CISPR 25 conducted EMI limits
  • All switching converters operating above 2 MHz to avoid AM band
  • High light-load efficiency to reduce standby current consumption
  • Less than 25°C temperature rise under full load current conditions for all switching converters
  • Stable converter operation with over 45° phase margin and over 10-dB gain margin

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Schematic/Block Diagram

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
Vin (Min) (V)633
Vin (Max) (V)363.53.5
Vout (Nom) (V)3.351.8
Iout (Max) (A)
Output Power (W)4.951.252.286
Input TypeDCDCDC
TopologyBuck- SynchronousLinear RegulatorBuck- Synchronous

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM63615-Q1  3.5-V to 36-V, 1.5-A step-down voltage converter with spread spectrum  Step-down (buck)  Sample & Buy Not Available
LM74700-Q1  Low Iq, ideal diode controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS61240-Q1  Automotive 2.3V to 5.5V Input Range, 3.5 MHz Fixed Frequency 450mA Boost Converter  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS62812-Q1  Automotive 2.75-V to 6-V, 2-A step-down converter in a 2mm x 3mm wettable-flanks QFN package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM63615-Q1 Download
LM74700-Q1 Download -
TPS61240-Q1 Download Download
TPS62812-Q1 VQFN-HR (RWY)| 9 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 4602 25 Sep 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1476 25 Sep 2019
ZIP 703 25 Sep 2019
PDF 823 25 Sep 2019
PDF 116 25 Sep 2019
PDF 58 25 Sep 2019
PDF 279 25 Sep 2019

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