24-VIN, 240-W, 98% efficient, compact 5S battery charger with USB On-The-Go (OTG) reference design


Design files


This battery charger reference design is designed for a 5 to 24-VIN, 240-W power tool that features BQ25731 one- to five-cell NVDC buck-boost battery charge controller. This is a high power, high efficiency and high density design. PMP22805 delivers 240 W with 98% efficiency and fits in a compact 1.08 inch x 1.68 inch (27.4 mm x 42.7 mm) form factor. The USB On-The-Go (OTG) capability makes it a power bank. It is ideal for power tools where high power, high efficiency and high density are top priorities. This reference design supports 1 to 5S battery and accepts a wide-input range such as USB Type-C® PD interface.

  • High power 5 to 24 VIN and 240 W
  • High efficiency of 98%
  • Compact size of 1.08 inches x 1.68 inches (27.4 mm x 42.7 mm)
  • USB On-The-Go power bank
  • Supports 1 to 5S battery
  • Wide input range USB Type-C PD compliance
Personal electronics
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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.

TIDT270.PDF (1124 K)

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

TIDMA98.PDF (255 K)

Detailed schematic diagram for design layout and components

TIDMA99.PDF (312 K)

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


Detailed overview of design layout for component placement


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

TIDCG58.ZIP (370 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ25731I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report 24-VIN, 240-W, 98% Efficient, Compact 5S Battery Charger W/ USB On-The-Go RefDes PDF | HTML Mar. 11, 2022
EVM User's guide BQ2573x Evaluation Module (Rev. A) PDF | HTML Jan. 19, 2021

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