METHOD AND SYSTEM TO PREVENT BUS VOLTAGE SAGGING WHEN AN ORING-FET IN AN N+1 REDUNDANT POWER SUPPLY CONFIGURATION IS FAULTY DURING POWER UP
First Claim
1. A method comprising:
- receiving, by a voltage comparator, an input voltage of an Oring-FET and an output voltage of the Oring-FET with the Oring-FET being in a redundant power supply configuration;
comparing the input voltage and the output voltage;
in the event the input voltage is less than the output voltage during power up, the Oring-FET provides output to a communicatively coupled system bus; and
in the event the input voltage is approximately equal to the output voltage during power up, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus.
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Abstract
A system and method for preventing bus voltage sagging when an Oring-FET in an N+1 redundant power supply configuration is faulty during power up. Each redundant power supply includes an Oring-FET and a voltage comparator. The voltage comparator receives and compares an input voltage and an output voltage of the Oring-FET during power up. In the event input voltage is less than the output voltage, the Oring-FET is deemed to be operating properly and provides output to a communicatively coupled system bus in response to the input voltage reaching a predetermined voltage threshold level. In the event the input voltage is approximately equal to the output voltage, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus and prevents voltage sagging on the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus.
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Citations
20 Claims
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1. A method comprising:
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receiving, by a voltage comparator, an input voltage of an Oring-FET and an output voltage of the Oring-FET with the Oring-FET being in a redundant power supply configuration; comparing the input voltage and the output voltage; in the event the input voltage is less than the output voltage during power up, the Oring-FET provides output to a communicatively coupled system bus; and in the event the input voltage is approximately equal to the output voltage during power up, the voltage comparator assists in preventing inrush current from flowing from the communicatively coupled system bus when another redundant power supply configuration is providing power to the communicatively coupled system bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising an N+1 redundant power configuration with each power configuration comprising:
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a voltage comparator configured to; receive an input voltage of an Oring-FET and an output of the Oring-FET with the Oring-FET being in the redundant power supply configuration; and compare the input voltage and the output voltage; and an overcurrent Oring-FET with a Vgate of the overcurrent Oring-FET communicatively coupled to the voltage comparator with the overcurrent Oring-FET configured to; cause the Oring-FET to provide output to a communicatively coupled system bus in the event the input voltage is less than the output voltage during power up; and assist in preventing inrush current from flowing from the communicatively coupled system bus in the event the input voltage is approximately equal to the output voltage during power when another redundant power supply configuration is providing power to the communicatively coupled system bus. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification