PMP22419

140-W high power density battery charger reference design

PMP22419

Design files

Overview

This battery charger reference design is for a 20-VIN, 140-W notebook personal computer (PC), featuring the BQ25720 1-to-4 cell narrow voltage DC (NVDC) buck-boost battery charge controller. This battery charger delivers 140-W with 97.2% efficiency and fits in a compact 1-in × 1.3-in (25.4-mm × 33.0-mm) form factor. The high-density design uses our dual field effect transistor (FET) CSD87352 and reduces the design size by 40% compared to a discrete FET design. Due to the low thermal resistance of our dual FETs, the device temperature is kept low, even with a smaller design size. This reference design is for notebook PCs where high power, high efficiency and high density are top priorities. The design supports a 1-to-4S battery and accepts a wide input range such as USB Type-C® Power Delivery (PD) sources and traditional adapters.

Features
  • 16-A max charge current
  • 97.2% efficiency at 16.8 V and 140 W
  • Compact size of 1 in × 1.3 in (25.4 mm × 33.0 mm)
  • Low thermal resistance dual FET package
  • Excellent thermal performance
Output voltage options PMP22419.1
Vin (Min) (V) 3.5
Vin (Max) (V) 26
Vout (Nom) (V) 16.8
Iout (Max) (A) 16
Output Power (W) 268.8
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- 4 Switch
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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.

PDF | HTML
TIDT341.PDF (560 K)

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

TIDMBR3.PDF (375 K)

Detailed schematic diagram for design layout and components

TIDMBR4.PDF (343 K)

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

TIDMBR5.PDF (318 K)

Detailed overview of design layout for component placement

TIDMBR7.ZIP (1252 K)

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

TIDCGG5.ZIP (2021 K)

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

TIDMBR6.PDF (1168 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ25720SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG

Data sheet: PDF | HTML
MOSFETs

CSD87352Q5D30-V, N channel synchronous buck NexFET™ power MOSFET, SON 5 mm x 6 mm power block, 25 A

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report 140-W, High-Density Battery Charger Reference Design PDF | HTML Jul. 21, 2023

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