5V@2.1A USB Charger Automotive Reference Design


Design files


This USB 3.0 charger provides 5V @ 2.1A over an automotive input range of 8V - 40V. It uses the integrated FET TPS54340 PWM Buck controller and implements cable voltage droop compensation. A TPS2546 charging port controller provides data line switching plus an integrated FET with dual current protection thresholds.

  • 8 to 40V (12V nominal) input voltage and 5V/2.1A output with TPS54340
  • Programmable voltage droop
  • Supports both USB 2.0 and 3.0 power switch requirements
  • This reference design has been lab tested and is supported with design files and an application note
Output voltage options PMP10282.1
Vin (Min) (V) 8
Vin (Max) (V) 40
Vout (Nom) (V) 5
Iout (Max) (A) 2.1
Output Power (W) 10.5
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Non Sync
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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

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TIDUB55.PDF (1638 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRIW4.ZIP (13917 K)

Files used for 3D models or 2D drawings of IC components


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


Includes TI products in the design and potential alternatives.

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Analog current-sense amplifiers

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

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Buck converters (integrated switch)

TPS5434042 V Input, 3.5 A, Step-Down DC/DC Converter with Eco-mode™

Data sheet: PDF | HTML
ESD protection diodes

TPD2E001Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0

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

TPS2546USB charging port controller with CDP/SDP auto swtich and 2.5A power switch with load detection

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP10282 Test Results Nov. 30, 2015

Related design resources

Reference designs

PMP7390 Dual-Port Automotive USB Charger Reference Design

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