Capacitor Charging Circuit Question

AI Thread Summary
In a high voltage boost converter charger circuit for capacitors, an LED indicates when charging is complete by detecting the voltage across the capacitor. The charger typically uses a feedback mechanism to monitor the voltage level, signaling when the capacitor reaches its full charge. Upon completion, the circuit may disconnect the capacitor or shut off the charging process to prevent overcharging. This ensures the safety and longevity of the capacitor. Understanding these mechanisms is crucial for designing efficient charging circuits.
kjjohn
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I understand what a capacitor charging circuit looks like, and know how it works. My question is, with an HV boost converter charger, for charging high voltage caps, there is often an LED that lights when charging is complete. How does this work - how does the charger know when the capacitor is full? And does it actually disconnect the cap from the circuit or shut off the circuit after the cap is completely charged?
 
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