Power consumption limit associated with power over ethernet (POE) computing system
A computing system is associated with power consumption based on Power over Ethernet (PoE). Power consumption is compared to a threshold, and a signal is asserted that power consumption is to be limited based on the comparison to the threshold.
1. A system, comprising:
a power converter to draw power from Power over Ethernet (PoE) and power the system with an amount of PoE converted power;
a display including a backlight, wherein:
converted PoE power consumption of the display is limited based on a signal indicating that the total converted PoE power consumption of the system is to be limited;
the display derives power from a second voltage rail; and
the backlight to vary the brightness while maintaining a threshold level of brightness as converted PoE power provided via the second voltage rail to the backlight varies to limit the total converted PoE power consumption; and
a power meter to:
compare an amount of PoE converted power consumption on a first voltage rail to a threshold amount of power consumption, wherein the first voltage rail is different than the second voltage rail;
maintain assertion of the signal based on a determination that the amount of PoE converted power consumption is greater than the threshold amount of power consumption; and
de-assert the signal based on a determination that the amount of PoE converted power consumption is less than the threshold amount of power consumption.
2. The system of claim 1 , further comprising the power meter to:
reduce an amount of PoE converted power to the second voltage rail; and
maintain an amount of power to a processor in the system, wherein the processor derives power from the first voltage rail.
3. The system of claim 1 , further comprising the power converter to:
provide power comprising a first voltage; and
provide power comprising a second voltage to power a component of the system.
4. The system of claim 3 , further comprising the power meter to compare power based on the first voltage.
5. A power converter, comprising:
an input to receive Power over Ethernet (PoE) from a power source;
a transformer to convert the PoE received from the power source to an amount of available PoE converted power provided by a first voltage rail; and
a power meter to:
compare a total amount of PoE power consumption to a first threshold;
assert a signal indicating that the total amount of converted PoE is to be limited based on a determination that the total amount of PoE power consumption is above a first threshold;
compare the total amount of PoE power consumption to a second threshold;
maintain assertion of the signal based on a determination that the total amount of PoE power consumption is greater than the second threshold;
de-assert the signal based on a determination that the total amount of PoE power consumption is less than the second threshold; and
vary a brightness of a backlight of a display while maintaining a threshold level of brightness as an amount of PoE power provided via a second voltage rail to the backlight varies.
6. The power converter of claim 5 , further comprising the power meter to
reduce the amount of PoE power to the second voltage rail, wherein the second voltage rail is different than the first voltage rail.
7. The power converter of claim 5 , further comprising the power meter to maintain an amount of PoE to the first voltage rail, wherein the first voltage rail provides power to a processer of a computing system.
8. The power converter of claim 5 , wherein the power meter is to assert the signal that power consumption is to be limited based on a determination that the total amount of PoE power consumption is above the first threshold for a first period of time.
9. The power converter of claim 5 , wherein the power meter is to assert the signal that power consumption is to be limited based on a determination that the total amount of PoE power consumption is above the first threshold by a first amount.
10. A method, comprising:
monitoring, at a first voltage rail, a total amount of converted Power over Ethernet (PoE) power consumption by a system;
asserting a signal to limit the total amount of converted PoE power consumption by the system based on a comparison of the total amount of converted PoE power consumption by the system to a first threshold amount of converted PoE power consumption;
limiting the converted PoE power consumption of a component of the system, wherein the component is powered by a second voltage rail that is different than the first voltage rail, and wherein the system includes a display including a backlight to vary in brightness while maintaining a threshold level of brightness as converted PoE power provided via the second voltage rail to the backlight varies;
comparing the total converted PoE power consumption of the system to a second threshold;
maintaining assertion of the signal based on a determination that the total converted PoE power consumption is greater than the second threshold; and
de-asserting the signal based on a determination that the total converted PoE power consumption is less than the second threshold.
11. The method of claim 10 , wherein limiting the converted PoE power consumption of a component of the system includes:
limiting an amount of power to the second voltage rail; and
maintaining an amount of power to the first voltage rail.
12. The method of claim 10 , wherein limiting the converted PoE power consumption of a component of a system includes
maintaining an amount of power to a processor of the system.
13. The method of claim 10 , further comprising:
monitoring power consumption based on a first voltage output of a PoE power converter; and
adjusting power consumption of a plurality of components of the system associated with a second voltage output of the PoE power converter.
14. The method of claim 10 , further comprising asserting a signal to reduce power to the component by a variable amount based on a difference between the amount of PoE power consumption and the first threshold.