Technical FAQs 4

How do you charge a super capacitor?

Most super capacitors (supercaps) can be discharged down to 0 V and recharged to their maximum voltage with the manufacturer recommended charge current. A simple voltage regulating LED driver with constant current, usually regulated by sensing a low side, series current sense resistor, then a voltage clamp can be used to charge a super capacitor.

Can You charge a super capacitor at a higher voltage?

1) You must never charge past the capacitor voltage rating. If you have a 2.5v super capacitor, you must NEVER charge it at a higher voltage. If you do, you risk damaging the integrity of the capacitor, or worse, an explosion. Personally, I never charge past 80-90% of the rated charge.

Can a super capacitor be discharged down 0 V?

All trademarks are the property of their respective owners. Most super capacitors (supercaps) can be discharged down to 0 V and recharged to their maximum voltage with the manufacturer recommended charge current.

Can a supercapacitor charge more than rated voltage?

A common rule of thumb is to limit the charging current to the supercapacitor’s rated current. The charging voltage should not exceed the supercapacitor’s rated voltage, to prevent overvoltage damage. A voltage regulation circuit is necessary.

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