Hello, Junya:
bq24773 is not good for this application because of USB input requirement and mounting area limitation
Please check "Battery Charger Solutions" link to find the single cell LiFePO4 charger with integrated power FETs:
BQ25910…
Chirag, thanks for the information. Please contact Eric Zhao (q-zhao@ti.com) to discuss your detailed charger requirement? TI has dual charger architectures (main charger + parallel charger) to achieve high rating charging. The charging current depends…