Dual-Port Automotive USB Charger Reference Design
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Using the TPS40170 PWM Buck Controller, this power management reference design provides a regulated 5V to power 2 USB ports at 2.1A each (total 4.2A) in a small form-factor. The design has been optimized for a nominal 12V input and accepts 8-60V.

  • 8 to 60V (12V nominal) input voltage and 5V/4.2A output with TPS40170
  • Form factor complies to UL 2089 and ANSI/SAE J563
  • Meets BC1.2 for DCP with one TPS2511 per port
  • Supports both USB 2.0 and 3.0 power switch requirements
  • TPS2511 USB power switch also offers the data line control to charge many devices
  • This reference design has been lab tested and is supported with design files and an application note

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Schematic/Block Diagram

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Test Data

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Design Files

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(Output Voltage 1)
Vin (Min) (V)9
Vin (Max) (V)60
Vout (Nom) (V)5
Iout (Max) (A)4.2
Output Power (W)21
Input TypeDC
TopologyBuck- Synchronous
USB Switch

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS2511  USB dedicated charging port controller and 2.2A power switch  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS40170  4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS2511 Download Download
TPS40170 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1276 14 May 2012
Design files (4)
Title Type Size (KB) Date
ZIP 326 14 May 2012
PDF 24 14 May 2012
PDF 29 14 May 2012
PDF 33 14 May 2012

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