USB Li-Ion Battery Charger and Power-Path Management Reference Design


Design files


This reference design delivers up to 1000 mA of continuous current to the battery output when programmed with a resistor on the ISET pin and is programmed at the factory for ~540mA. The USB current limit modes are selected by the ISET2 pin and limits current to a maximum of 500 mA (logic high) or 100 mA (float or high impedance). A low on the ISET2 pin programs the charge current using the ISET resistor.

  • Number of series cells: 1S
  • Maximum input volts: 12 V
  • Maximum charge current: 1 A
  • Linear topology

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.

TIDU099.PDF (424 K)

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

TIDR069.PDF (113 K)

Detailed schematic diagram for design layout and components

TIDR070.PDF (42 K)

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

TIDU100.PDF (132 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Test report TIDA-00044 Test Results Aug. 26, 2013

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