This battery charger is designed for a 40V, 320W notebook PC, featuring the BQ25770G quasi-dualphase buck-boost battery charge controller. This reference design delivers 320W with 98% peak efficiency, and spreads out the heat across two parallel half bridges and inductors. Gallium nitride (GaN) field effect transistors (FETs) are chosen as the high-side FETs for high efficiency, and silicon FETs are chosen as the low-side FETs for low cost. This hybrid-FET reference design is cost-effective and highly-efficient for high-power multicell battery chargers.
| Output voltage options | PMP22405.1 |
|---|---|
| Vin (Min) (V) | 3.5 |
| Vin (Max) (V) | 40 |
| Vout (Nom) (V) | 20 |
| Iout (Max) (A) | 16 |
| Output Power (W) | 320 |
| 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 | 320W, Dual-Phase, Multicell Battery Charger Reference Design With Hybrid Switching FETs | PDF | HTML | Jul. 18, 2024 |
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