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Solutions Search - LTC4070 - Li-Ion/Polymer Shunt Battery Charger System

LTC3109/LTC4070 Unipolar Energy Harvester Charges Battery Backup

Jan 29th 2010
The LTC3109 is a highly integrated DC/DC converter ideal for harvesting surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators) and thermopiles. Its unique, proprietary autopolarity topology allows it to operate from input voltages as low as 30mV, regardless of polarity. In this circuit, ...

Circuit 

 

LTC4070 Photovoltaic Charger with Extremely Low Leakage When Not Charging

Jan 29th 2010
A photovoltaic (PV) application for the LTC4070 is illustrated in this example. In this application, transistor Q1 has been added to further reduce the already low quiescent current of the LTC4070 to achieve extremely low battery discharge when the PV cells are not charging the battery. In long battery life applications, Q1 ...

Circuit