2.1 System Hardware Blocks

To implement the system, several hardware blocks will be required:

1. Voltage dividers for monitoring the input voltage, battery voltage and the load voltage.
2. An ASIC battery charger (MCP73844).
3. An ASIC switching regulator (MCP16311).
4. Digital outputs to enable/disable the charger and the output switching regulator.
5. An input to monitor the charger status.
6. A high side current mirror to monitor the battery charge and discharge currents.
7. A temperature sensor to monitor the battery temperature (MCP9700).