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Overview

DC uninterruptible power supply. A power-path charger takes energy from an adapter or a solar panel, a BMS protects the 18650 pack and eFuses limit each output; an STM32G0 supervises the system.

Design challenges solved

  1. Dedicated BMS for the battery pack and eFuses on the outputs.
  2. Multiple inputs (adapter, MPPT) with TVS protection.

Key components

BQ25798Power-path / MPPT charger
BQ76905BMS / cell monitor
TPS25927 · TPS25926eFuses
TPS62130Buck converter
STM32G0B1Supervisor MCU