Single USB Car Charger with Cable Compensation and Battery Short Protection Reference Design
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Key Document


The PMP11668 reference design is a single channel USB charger for automotive application. It includes a buck converter followed by a USB charging port controller. Its built-in short-to-battery protection, IEC ESD protection features enhance the system's reliability significantly in automotive application. This design can also handle a 2.1A load current using a simple two layer design. Its output port supports the USB BC1.2 CDP charging protocol.

  • Linear VBUS droop compensation
  • Short-to-battery protection on protected VBUS, DP_IN and DM_IN pins
  • IEC ESD protection on DP_IN/DM_IN
  • USB BC1.2 CDP charging protocol supported
  • High integration for the compensation and protections
  • Two layer simple design

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Design Files

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(Output Voltage 1)
Vin (Min) (V)6.5
Vin (Max) (V)36
Vout (Nom) (V)5
Iout (Max) (A)2.1
Output Power (W)10.5
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMR23630  SIMPLE SWITCHER®, 36V 3A Synchronous Step-Down Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS254900-Q1  Automotive USB Charge port controller with short to BATT protection and droop compensation  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LMR23630 Download Download
Download Download
TPS254900-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 544 10 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 485 10 Nov 2016
ZIP 28 10 Nov 2016
PDF 664 10 Nov 2016
PDF 81 10 Nov 2016
PDF 81 10 Nov 2016
PDF 61 10 Nov 2016
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
USB Type-C™ DFP 5V3A Charger Reference Design  PMP11594  Reference design 

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