Method and apparatus for limiting re-rush current in a power supply unit (psu) using a battery backup unit (bbu)
AssigneeMicrochip Technology Incorporated
InventorJongwan Kim
Life of this patent
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Abstract
Disclosed herein are apparatus, system, method, and computer-readable medium aspects for limiting re-rush current in a power supply system. An example method may include detecting an AC power dropout event, activating a battery backup unit (BBU) to supply energy, charging a bulk capacitor of a power factor correction stage within a power supply unit during the AC power dropout event using energy stored in the BBU, and resuming power conversion in the power supply system in response to restoration of AC power with limited or no re-rush current.
Claims20
A method for limiting re-rush current in a power supply system, the method comprising:
- detecting an AC power dropout event;
- activating a battery backup unit (BBU) to supply energy;
- charging a bulk capacitor of a power factor correction (PFC) stage within a power supply unit (PSU) during the AC power dropout event using energy stored in the BBU;
- and
- resuming power conversion in the power supply system in response to restoration of AC power to limit re-rush current.
An apparatus for limiting re-rush current in a power supply system, the apparatus comprising:
- a power supply unit (PSU) having a power factor correction (PFC) stage with a bulk capacitor;
- a battery backup unit (BBU) to store and discharge energy;
- and
- a controller to:
- detect an AC power dropout event;
- activate the BBU to charge the bulk capacitor during the AC power dropout event;
- and
- resume power conversion in the PSU in response to restoration of AC power to limit re-rush current.
Dependencies are inferred from the claim text.