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.
Features
- High-power 40V input and 320W
- High efficiency of 98%
- Cost-effective hybrid GaN and Silicon FETs
- Excellent thermal performance
- Supports 2 to 5-cell battery
- Extended power range (EPR) USB Type-C® power delivery (PD) compliance