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.
| 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 |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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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
Files used for 3D models or 2D drawings of IC components
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.
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | 140-W, High-Density Battery Charger Reference Design | PDF | HTML | Jul. 21, 2023 |
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