A first revision of MPPT supercap/Li-ion UPS
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Horray! I have finished PCB design for a first revision of the Maximum Power Point Tracking (MPPT) Supercapacitor and Li-ion Uninterrupted Power Supply (UPS).

The device contains a charger with Constant Current (CC)/Constant Voltage (CV) regulation with the input voltage range of 3 to 12 V, based on TPS63060. Charging of two supercapacitors in series with balancing is supported. The charger also supports charging of one Li-ion battery. It is automatically detected whether Li-ion battery or supercapacitors are connected. Maximum input charging power is around 15 Watts.

The output voltage converter is based on TPS63020 and the output voltage can be set anywhere between 1.8 to 5.5V. The maximum output power is around 20W Watts.

The UPS is controlled with STM32F072RBT6 micro controller. It is possible to communicate with the micro controller through UART to get the information about voltages, input current and status. It is also planned to connect LCD display for the further development, thus SPI is break-outed together with second UART and I2C for other peripherals.

The first 10 boards are ordered, hoping that the first revision works!