PMP4425

Automotive USB Charger with Linear Droop Compensation Reference Design

PMP4425

Design files

Overview

The PMP4425 reference design provides detailed data for evaluating and verifying a USB charger, which uses a USB charge controller, a buck converter and a shunt amplifier. Additionally the design demonstrates an automotive USB charging port that offers short-to-battery protection. With the help of the shunt amplifier, the design is capable of compensating for the effects on Vdroop when a 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 2.1 A, BC 1.2 compliant devices are supported as well as D+/D- divider modes of 2.7V/2.7V and 1.2V.

Features
  • Linear cable compensation feature 
  • The TI devices in this design are AEC-Q100 qualified.
  • Supports CDP/SDP auto switch for small industry standard footprint based devices.
  • Size: 95mm(L)X30.7mm(W)x12mm(H)
  • High efficiency with 91% @ 19Vin full load

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.

TIDU747.PDF (523 K)

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

TIDRCN2.PDF (30 K)

Detailed schematic diagram for design layout and components

TIDRCN3.PDF (41 K)

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

TIDRCN4.ZIP (179 K)

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

Products

Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS54340-Q1Automotive 4.5V-42VIN, 3.5A, Step-Down Converter with Eco-mode™

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

INA21326V, bi-directional, high-precision current sense amplifier

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
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
Test report PMP4425 Test Results Jan. 19, 2015

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