Dual-Port Automotive USB Charger Reference Design


Design files


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

Output voltage options PMP7390.1
Vin (Min) (V) 9
Vin (Max) (V) 60
Vout (Nom) (V) 5
Iout (Max) (A) 4.2
Output Power (W) 21
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous^USB Switch
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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.

SLUU955.PDF (1333 K)

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

SLUR898.PDF (33 K)

Detailed schematic diagram for design layout and components

SLUR899.PDF (29 K)

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

SLUC361.ZIP (326 K)

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

SLUU956.PDF (24 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS401704.5 V to 60 V Wide-Input Synchronous PWM Buck Controller

Data sheet: PDF | HTML
USB power switches & charging port controllers

TPS2511USB dedicated charging port controller and 2.2A power switch

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP7390 Test Results May 14, 2012

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