Photovoltaic Cell Battery Charger / Solar Cell Li-Ion Battery Trickle Charger with MPPC

Photovoltaic Cell Battery Charger / Solar Cell Li-Ion Battery Trickle Charger with MPPC

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This is a tiny module that allows users to charge small Li-ion batteries, CR2032 or equivalent, from a low power source such as a small photovoltaic cell. The project consists of the LTC3105 step-up DC-DC converter chip which features Maximum Power Point Control (MPPC) and 250mV start-up voltage which enables operational directly from low power, high impedance alternative power sources such as photovoltaic cells. A user-programmable MPPC set point maximizes the energy that can be extracted from any power source. Burst Mode operation, with a proprietary self-adjusting peak current, optimizes converter efficiency and output voltage ripple overall operating conditions. The circuit works with single-cell or dual-cell in parallel. The operating supply of this project is as low as 225mV and a maximum of 5V. Input supply should not exceed 5V DC. The module is programmed to output 4.1V which is important to charge the Li-On battery. Jumper J1 should be open for normal operation, close to disable the output.

Photovoltaic Cell Battery Charger / Solar Cell Li-Ion Battery Trickle Charger with MPPC – [Link]

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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