Capacitance monitoring circuit for power backup systems
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United States of America Patent
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Nov 28, 2023
Grant Date -
N/A
app pub date -
Jun 22, 2021
filing date -
Jun 22, 2021
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Systems and methods are described for reporting capacitance of a capacitor of a power backup circuit comprising a plurality of metal-oxide-semiconductor field-effect transistors (MOSFETs). The system may also include a bleeder resistor and a voltage detection circuit. When capacitance monitoring is active, a first MOSFET may be turned off, causing the capacitor to be discharged via the bleeder resistor. After predetermined time intervals, a first drain voltage and a second drain voltage of the first MOSFET may be determined using the voltage detection circuit. The drain voltage readings at the different times may be used to determine the capacitance of the capacitor, which may be used to generate and transmit a report on capacitor performance and status.
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