Automotive USB Charger with Linear Droop Compensation Reference Design


Design files


The TIDA-00160 reference design provides detailed data for evaluating and verifying a USB charger, which uses a USB charge controller, a buck controller and a shunt amplifier.

This design demonstrates an automotive USB charging port that offers short-to-battery protection. With the help of the shunt amplifier, the design aims to compensate the effects on Vdroop when the smartphone/tablet is connected to the USB charger using a cable that is roughly 2-3 meters in length.

  • Compliance wtih almost all major smartphone/tablet manufacturers is supported due to programmable current limit up to 3A, BC 1.2 compliant devices being supported, and D+/D- divider modes of 2.7V/2.7V and 1.2V.
  • Drop in and BOM compatible wtih TPS2543-Q1.
  • The TI devices in this design are AEC-Q100 qualified.
  • Supports CDP/SDP auto switch for small industry standard footprint based devices.

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.

TIDU395.PDF (225 K)

Reference design overview and verified performance test data

TIDR646.PDF (56 K)

Detailed schematic diagram for design layout and components

TIDR647.PDF (73 K)

Detailed schematic diagram for design layout and components

TIDR648.PDF (132 K)

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

TIDC135.ZIP (112 K)

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


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

LM25117-Q1Automotive Grade 4.5-42V Wide Vin, Current Mode Synchronous Buck Controller with Tracking

Data sheet document-pdfAcrobat PDF open-in-new HTML
Current sense amplifiers analog output

INA213-Q1AEC-Q100, 26V, bi-directional, high-precision current sense amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TPD2E001-Q1Automotive Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with VCC pin for USB 2.0

Data sheet document-pdfAcrobat PDF
N-channel MOSFETs

CSD18503Q5A40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.3 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
USB power switches & charging port controllers

TPS2546-Q1Automotive USB charging port controller and power switch

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Design guide TIDA-00160 Overview Jun. 16, 2014
User guide TIDA-00160 Test Results May 15, 2014

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