Thermal management techniques in an electronic device
First Claim
1. A method for thermal management of an electronics device, comprising:
- monitoring temperature of a target location in a device without having a temperature sensor at that location, by(a) filtering a sequence of temperature readings from a temperature sensor that is at a remote location in the device, and(b) using one of the filtered temperature readings to access a look up table, that lists temperature thresholds and corresponding power consumption commands, and thereby identify a power consumption command associated with a component of the device,wherein the corresponding power consumption commands include a plurality of no change commands and at least one change command that limits or reduces power consumption of a component in the device, wherein the look up table correlates temperature at the temperature sensor with temperature at said target location in the device.
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Abstract
A thermal manager has a digital filter whose input is to receive raw temperature values from a sensor and whose output is to provide processed or filtered temperature values according to a filter function that correlates temperature at the sensor with temperature at another location in the device. The thermal manager has a look-up table that further correlates temperature at the sensor with temperature at the other location. The look-up table contains a list of processed temperature sensor values, and/or a list of temperatures representing the temperature at the other location, and their respective power consumption change commands. The thermal manager accesses the look-up table using selected, filtered temperature values, to identify their respective power consumption change commands. The latter are then evaluated and may be applied, to mitigate a thermal at the other location. Other embodiments are also described and claimed.
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Citations
18 Claims
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1. A method for thermal management of an electronics device, comprising:
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monitoring temperature of a target location in a device without having a temperature sensor at that location, by (a) filtering a sequence of temperature readings from a temperature sensor that is at a remote location in the device, and (b) using one of the filtered temperature readings to access a look up table, that lists temperature thresholds and corresponding power consumption commands, and thereby identify a power consumption command associated with a component of the device, wherein the corresponding power consumption commands include a plurality of no change commands and at least one change command that limits or reduces power consumption of a component in the device, wherein the look up table correlates temperature at the temperature sensor with temperature at said target location in the device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for thermal management of an electronic device, comprising:
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reading a first temperature sensor that is located in a device closer to a first component of the device than second and third components of the device; reading a second temperature sensor that is located in the device closer to the second component than the first and third components; and correlating readouts from the first temperature sensor with readouts from the second temperature sensor to extrapolate temperature of a selected one of the first, second and third components, and on that basis changing a power consumption limit of the selected component.
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9. An electronic device comprising:
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a temperature sensor; and a thermal manager having a digital filter whose input is to receive raw temperature values from the sensor and whose output is to provide processed temperature values according to a filter function that correlates temperature at the sensor with temperature at another location in a device, the thermal manager having a look-up table that further correlates temperature at the sensor with temperature at said another location, the look-up table having a list of temperature values, representing a temperature range at the sensor or at said another location, and a plurality of power consumption change commands associated with the list of temperature values, respectively, the thermal manager to access the look-up table a plurality of times, each time using a different one of the processed temperature values, to identify a plurality of power consumption change commands and evaluate the identified plurality of power consumption change commands to determine what change, if any, should be commanded to the power consumption of a component in the device. - View Dependent Claims (10, 11, 12, 13)
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14. An electronic device comprising:
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a temperature sensor disposed at a first location of a device that is remote from a second location of the device; and a thermal manager to process a sequence of temperature readings from the temperature sensor to obtain a sequence of processed temperature readings, the thermal manager having a look up table that lists a plurality of temperature thresholds associated with a plurality of power consumption commands, respectively, wherein the power consumption commands include a plurality of no change commands and at least one change command that limits or reduces power consumption of a component in the device, the thermal manager to select a plurality of the sequence of processed temperature readings and use each selected processed reading to access the look up table and thereby identify a power consumption command, and to evaluate the identified power consumption command to determine what change, if any, should be commanded to mitigate a thermal event in the device. - View Dependent Claims (15, 16, 17, 18)
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Specification