Information handling system power supply automated de-rating for power output and thermal constraints
An information handling system power supply dynamically adapts thermal and power output protection constraints based upon thermal and power output conditions measured at the power supply. In the event of changing conditions at the information handling system, such as an increase in ambient temperature or an increase in power consumption, a power constraint adaptive module adjusts constraints at which the power supply will shut down in order to maintain power to an information handling system outside of a normal power and thermal constraint operating envelope for the power supply.
1. An information handling system comprising:
plural processing components operable to cooperate to process information;
first and second power supplies operable to provide power to the plural processing components, each power supply having an adjustable output current constraint and thermal constraint; and
a constraint adaptive module interfaced with the first and second power supplies and operable to dynamically adjust the output current constraint and the thermal constraint at the first power supply in response to a predetermined condition at the second power supply.
2. The information handling system of claim 1 further comprising a management processor interfaced with the processing components and operable to adjust power consumption of the processing components, the management processor further operable to receive the dynamically adjusted output current constraint from the constraint adaptive module and to manage power consumption of the processing components to remain below the dynamically adjusted output current constraint.
3. The information handling system of claim 2 wherein the processing components comprise plural processing modules disposed in a chassis and the management processor comprises a chassis management controller that manages power of the chassis.
4. The information handling system of claim 2 wherein the processing components comprise a processing module and the management processor comprises a baseboard management controller that manages power of the processing module.
5. The information handling system of claim 2 wherein the management processor is further operable to dynamically compute the dynamically adjusted current output constraint based upon thermal and output current measurements sensed at the first power supply and communicated to the management processor.
6. The information handling system of claim 5 wherein the constraint adaptive module provides a constraint formula to the management processor, the management processor operable to apply the constraint formula to dynamically compute the predetermined output current constraint.
7. The information handling system of claim 1 wherein the constraint adaptive module dynamically adjusts the thermal constraint and output current constraint by increasing a maximum allowed power supply output current and decreasing a maximum allowed power supply ambient temperature.
8. The information handling system of claim 1 wherein the constraint adaptive module dynamically adjusts the thermal constraint and output current constraint by increasing a maximum allowed power supply temperature and decreasing a maximum allowed power supply output current.
9. A method for powering an information handling system with plural power supplies, the method comprising:
monitoring power output by the power supplies;
shutting down one of the power supplies if power output at the one power supply exceeds a power output constraint;
monitoring temperature associated with the power supplies;
shutting down one of the power supplies if the temperature at the one power supply exceeds a thermal constraint;
detecting a failure of one of the power supplies; and
in response to detecting, applying the monitored power output and temperature to dynamically reset the output constraint and thermal constraint of the other of the power supplies that remains operational.
10. The method of claim 9 wherein in response to detecting further comprises increasing the output constraint of the other of the plural power supplies that remains operational by decreasing the thermal constraint.
11. The method of claim 10 further comprising:
communicating the failure and the increased output constraint to the information handling system; and
managing operation of the information handling system to maintain power consumption below the increased output constraint.
12. The method of claim 9 wherein in response to detecting, applying the monitored power output and temperature to dynamically reset the output constraint and the thermal constraint further comprises calculating a power rating at the power supply by inputting values from the monitoring power output and the monitoring temperature.
13. The method of claim 12 further comprising:
communicating the reset output constraint to the information handling system; and
managing power consumption at the information handling system to remain below the reset output constraint.
14. The method of claim 9 further comprising:
calculating the reset output constraint at the information handling system by inputting the values from the monitoring power output and the monitoring temperature; and
managing power consumption at the information handling system to remain below the calculated reset output constraint.
15. A power supply comprising:
a power component operable to output power at variable power settings to power a device;
an output protection circuit operable to shut down the power component at an output constraint;
a thermal protection circuit operable to shut down the power component at a thermal constraint; and
a protection constraint adaptive module interfaced with the output protection circuit and the thermal protection circuit, the protection constraint adaptive module operable to dynamically adjust the thermal constraint and output constraint based upon thermal and output measurements associated with the power component, the protection constraint adaptive module dynamically adjusting the thermal and output constraints according to a constraint formula, the protection constraint adaptive module further operable to communicate predetermined of the constraint formula to an information handling system for the information handling system to independently determine the dynamically adjusted thermal and output constraints.
16. The power supply of claim 15 wherein the protection constraint adaptive module selectively increases the output constraint by decreasing the thermal constraint if the output measurement is within a predetermined amount of the output constraint and the thermal measurement is greater than a predetermined amount from the thermal constraint.
17. The power supply of claim 15 wherein the protection constraint adaptive module selectively increases the thermal constraint by decreasing the output constraint if the thermal measurement is within a predetermined amount of the thermal constraint and the output measurement is greater than a predetermined amount from the output constraint.