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LTC3350 11V to 20V, 16A Supercapacitor Charger with 6.4A Input Current Limit and 10V, 60W Backup Mode

Application Circuit 2. 11V to 20V, 16A Supercapacitor Charger with 6.4A Input Current Limit and 10V, 60W Backup Mode

The LTC®3350 is a backup power controller that can charge and monitor a series stack of one to four supercapacitors. The LTC3350’s synchronous step-down controller drives N‑channel MOSFETs for constant current/constant voltage charging with programmable input current limit. In addition, the step-down converter can run in reverse as a step-up converter to deliver power from the supercapacitor stack to the backup supply rail. Internal balancers eliminate the need for external balance resistors and each capacitor has a shunt regulator for overvoltage protection.