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Supercap-Based Power Ride-Through Circuit Maximizes Run Time

2015-03-21 05:50  
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View Full Size Image View Original Design NoteSupercap-Based Power Ride-Through Circuit Maximizes Run Time Using an Energy Scavenging Scheme

This circuit shows a complete 3.3V/200mA ride-through application that maximizes the amount of power extracted from the supercap to support the load. The main components of the ride-through application includes the LTC4425 complete 2A supercapacitor charger to clamp the individual cell voltages and ensure that the cells do not overvoltage during charging and balances the cells throughout charge and discharge, the LTC3606 micropower buck regulator to produce the regulated 3.3V output, and the LTC4416 dual ideal diode switches the supercap in and out depending on need.

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