Input power scaling for power supply devices
阅读说明:本技术 功率供给设备的输入功率缩放 (Input power scaling for power supply devices ) 是由 R·C·布鲁克斯 M·R·达拉姆 C·伍德伯里 于 2017-04-14 设计创作,主要内容包括:在根据本公开内容的一个示例中,描述了一种功率管理设备。所述功率监视设备包括用于从功率供给设备接收输入功率信息的输入线。所述输入功率信息指示来自功率供给设备的输入功率的水平。功率监视设备的控制器基于功率供给设备的功率额定值来确定输入功率信息的缩放量。可编程缩放设备基于所述缩放量来对输入功率信息进行缩放以生成输出信息;以及输出线将输出信息传递到一组接收方设备。(In one example in accordance with the present disclosure, a power management device is described. The power monitoring device includes an input line for receiving input power information from a power sourcing device. The input power information indicates a level of input power from the power sourcing equipment. The controller of the power monitoring device determines an amount of scaling of the input power information based on a power rating of the power sourcing device. A programmable scaling device scales input power information based on the amount of scaling to generate output information; and an output line delivers the output information to a set of recipient devices.)
1. A power monitoring device, comprising:
an input line for receiving input power information from a power sourcing device, wherein the input power information is indicative of a level of input power from the power sourcing device;
a controller for determining an amount of scaling of the input power information based on a power rating of the power sourcing device;
a programmable scaling device to scale input power information based on the amount of scaling to generate output information; and
an output line for delivering the output information to a group of recipient devices.
2. The device of claim 1, wherein the amount of scaling is further determined based on a number of recipient devices in the set of recipient devices.
3. The apparatus of claim 1, wherein the programmable scaling apparatus comprises a voltage divider comprising:
a fixed resistance device having a fixed resistance;
a variable resistance device having a variable resistance.
4. The apparatus of claim 3, wherein scaling input power information comprises setting the variable resistance device to a resistance value that maps to the scaling amount.
5. The device of claim 3, wherein the variable resistance device is a programmable potentiometer adjustable to at least 256 resistance values.
6. The device of claim 3, further comprising a database for mapping the input power information to settings for the variable resistance device.
7. The device of claim 1, wherein the device is compatible with power sourcing equipment having different ratings.
8. The device of claim 1, wherein the set of recipient devices to which the output information is communicated comprises a system power control device.
9. A method, comprising:
monitoring a level of input power supplied by a power supply device;
determining a scaling amount of input power information to be supplied as output information based on a power rating of a power supply device, wherein the input power information indicates a level of input power; and
scaling the input power information based on the determined scaling amount by programming a variable resistance device of a second resistance device forming a voltage divider, wherein a first resistance device of the voltage divider has a fixed resistance.
10. The method of claim 9, further comprising:
receiving an indication of a change to a power delivery device; and
adjusting the amount of scaling based on the change.
11. The method of claim 9, wherein determining the amount of scaling of the input power information comprises determining a mapping of a power supply rating to a resistance value of the variable resistance device.
12. The method of claim 9, wherein the monitoring, determining, and scaling occur during a power-on self-test (POST) of the computing device.
13. A computing system, comprising:
a processor;
a machine-readable storage medium coupled to the processor; and
a set of instructions stored in a machine-readable storage medium for execution by a processor, wherein the set of instructions comprises:
instructions for monitoring a level of input power supplied by a power supply device;
instructions for determining a scaling amount of input power information to be supplied as output information based on a power rating of a power supply device, wherein the input power information indicates a level of input power; and
instructions for setting a variable resistance device of a second resistance device forming a voltage divider based on the amount of scaling, wherein a first resistance device of the voltage divider has a fixed resistance.
14. The computing system of claim 13, further comprising instructions to output information to a voltage regulator controller, a super input/output, or a combination thereof.
15. The computing system of claim 13, further comprising instructions for converting input power information from current to voltage.
Background
A computing device is made up of multiple and various components. Examples of such components include processors, memory units, and input/output devices. Each of these devices consumes power that is supplied by the power supply device of the computing device. As computing devices become more powerful, they consume more power.
Drawings
The accompanying drawings illustrate various examples of the principles described herein and are a part of the specification. The illustrated examples are given for illustration only and do not limit the scope of the claims.
Fig. 1 is a block diagram of an apparatus for input power scaling of a power sourcing device according to an example of principles described herein.
Fig. 2 is a flow chart of a method for input power scaling of a power sourcing device according to an example of principles described herein.
Fig. 3 is a circuit diagram of input power scaling for a power delivery device according to an example of principles described herein.
Fig. 4 is a flow chart of a method for input power scaling of a power sourcing device according to an example of principles described herein.
FIG. 5 is an illustration of a computing system for input power scaling of a power delivery device according to an example of principles described herein.
Throughout the drawings, identical reference numbers designate similar, but not necessarily identical, elements. The figures are not necessarily to scale and the dimensions of some parts may be exaggerated to more clearly illustrate the example shown. Further, the figures provide examples and/or implementations consistent with the description; however, the description is not limited to the examples and/or implementations provided in the figures.
Detailed Description
A computing device is made up of multiple and various components. Examples of such components include processors, memory units, and input/output devices. Each of these devices consumes power that is supplied by the power supply device of the computing device. As computing devices become more powerful, they consume more power; power may not be adequately supplied by a smaller power supply device. However, simply adding a larger power supply device may be undesirable. For example, a larger power supply takes up more space, is heavier, and is more costly to implement. The power management system may allow for more efficient use of the power supply. This specification describes a portion of a larger power management system. This portion provides a flexible way to monitor the power supplied to the computing device.
In particular, the present specification describes a system that 1) determines a rating (rating) of a power sourcing device that provides input power. Based on the nominal value, a programmable scaling device of the system scales the input power information. The input power information is scaled such that the output of the programmable scaling device is a predetermined value when the power supply delivers its rated power. For example, assume that the predetermined value is 2 volts (V). Thus, the scaling is such that if the power supply device were to operate at its rated power, the output voltage would be 2V. However, if the power supply device is operating at 50% of its rated power, the output voltage will be 1V.
This may be performed for different power sourcing devices coupled to the system and is compatible with multiple power sourcing device ratings. That is, over time, old power supply devices may be swapped out with new power supply devices. Sometimes, the new power supply device may have a different rating. This one power monitoring device can be used to scale information about the input power from a power sourcing device having any rating. That is, by using the present system, there is no limit on the rating of the power supply device that can supply power to the associated computing device.
In particular, in one example, this may be done by implementing the programmable potentiometer as a resistive device of a voltage divider. A signal is received by a controller of a power monitoring device, the signal indicating a rating of a power supply device coupled to the power monitoring device. From the map, a resistance value of the programmable potentiometer is calculated. The mapping may be a linear scaling such that a predetermined voltage is output when the power supply device is delivering its rated power. This output voltage may then be passed on to other components of the system to further monitor system power requirements or control power to the system. For example, other components may control power when the output voltage is above a threshold amount for longer than a predetermined period of time.
In particular, this specification describes a power monitoring device. The power monitoring device includes an input line for receiving input power information from a power sourcing device. The input power information indicates a level of input power from the power sourcing equipment. A controller of the computing device determines an amount of scaling for the input power information based on a power rating of the power sourcing device. A programmable scaling device of the computing device scales the input power information based on the amount of scaling to generate output information that is a scaled representation of the input power information, the output information being communicated to a set of recipient devices.
The present specification also describes a method for scaling input power for a power delivery device. According to the method, the level of input power supplied by a power supply device is monitored. The amount of scaling is determined based on a power rating of the power sourcing device. The amount of scaling determines how much the input power information is to be scaled to be supplied as output information. The input power information indicates a level of input power. Thus, the input power information is scaled based on the determined amount of scaling, and the output information is communicated, which is a scaled representation of the input power information. Such scaling may be implemented by programming a variable resistance device forming the second resistance device of the voltage divider, e.g. a potentiometer. The first resistive device of the voltage divider has a fixed resistance.
This specification also describes a computing system. The computing system includes a processor and a machine-readable storage medium coupled to the processor. A set of instructions stored in a machine-readable storage medium is executed by a processor. The set of instructions includes instructions for: monitoring a level of input power supplied by a power supply device; the method comprises determining a scaling amount of the input power information based on a power rating of the power supplying device, the scaling amount to be supplied as output information, the output information being a scaled representation of the input power information, and setting a variable resistance device based on the scaling amount, the variable resistance device forming a second resistance device of the voltage divider, e.g. a potentiometer. The first resistive device of the voltage divider has a fixed resistance.
In summary, using such a power monitoring device 1) increases the flexibility of the monitoring system by adapting to power supply devices with any rating; 2) accounting for power supply device switching; 3) reducing the part count on the circuit; and 4) reduced circuit complexity. It is contemplated, however, that the apparatus disclosed herein may address other problems and deficiencies in a number of technical areas.
As used in this specification and in the appended claims, the term "power rating" refers to the highest amount of power that a power supply device can safely provide without risk of overheating or otherwise damaging the power supply device.
Turning now to the drawings, FIG. 1 is a block diagram of a
The
As used in this specification and the appended claims, the term power sourcing device refers to a device that provides power to a computing device. Examples of power sourcing equipment include advanced technology extension (ATX) units, ATX12V units, 19V sources from Adapter (ADP) ports, and power sourcing equipment connected to universal serial bus, type C (USB-C) ports. Each power delivery device has a power rating that indicates an amount of power that the power delivery device can safely provide without overheating or otherwise failing.
The
The output information may be communicated to a recipient device that monitors or controls the system power requirements of the power sourcing device. As a particular example, the recipient device may be a Voltage Regulator (VR) controller that communicates system power requirements to a Central Processing Unit (CPU). Another example of a receiver device is a super input/output (SIO) device that controls system power requirements based on the average power of the system over a predefined time interval. In other words, the recipient device to which the output information is supplied may be a system power monitoring or control device. In some examples, the set of recipient devices may include a single device or may include multiple devices. For example, the output information may be passed to only the VR controller, or may be sent to both the VR controller and the SIO device.
It may be desirable to scale down the input power information to a particular output ratio. For example, the recipient device to which the output information is sent may 1) monitor the power supply device, and 2) operate within a certain range. Thus, the output information, e.g., output voltage, may be indicative of the input power, and the scaling of such output information places the output information in a range that is acceptable to the device to which it is transmitted.
Thus, the power supply device is coupled to the
Specifically,
The use of such a device dependent on the determined nominal value takes into account more than several predetermined power supply devices. For example, the
Again, the scaling amount depends on the power rating of the power supply device, wherein larger power supply devices, or power supply devices with higher ratings, are reduced according to different proportions as compared to power supply devices with lower ratings.
The
In one particular example, the
In some examples,
Fig. 2 is a flow chart of a
Thus, within the power management system, the
The amount of scaling depends on the power rating of the power sourcing equipment. Thus, the
Once the amount of scaling has been determined, the input power information is scaled based on the amount of scaling at
In some examples, monitoring the input power level at
Fig. 3 is a circuit diagram for input power scaling of power sourcing device 310 according to an example of principles described herein. In this particular example, the input power information is an input voltage and the output information is an output voltage. As described above, the
As described above, in some examples, a representation of the input power is converted to an input voltage. In this example, the
As a specific numerical example, the shunt resistor 336 may have a resistance of 0.01 ohms, the operational amplifier 338 may have a gain of 200, and the fixed resistance device 318 has a resistance of 100 kilo-ohms. Thus, if the op amp 338 detects three amps across the shunt resistor 336, the input voltage will be six volts. The voltage generated by the shunt resistor 336 and the operational amplifier 338 is input to the voltage divider of the
The
As another example, the database may indicate: when a predetermined output voltage of 2V is desired when the different power supply devices 310 are operating at their rated 65W, the variable resistance device within the potentiometer 316 should be set to 42.86 kohms.
As yet another example, the database may indicate: when a predetermined output voltage of 2V is desired while still a different power supply device 310 is operating at its rated 150W, the variable resistance device within potentiometer 316 should be set to 14.942 kohms. Although specific reference is made to particular power ratings and corresponding resistance values, power supply devices 310 having any rating may be used and a number of different mappings may be used. Although fig. 3 shows a database 312 that includes a mapping. In some examples, the amount of scaling may be calculated, in which case database 312 would not be used.
The instructions are then sent to the
Returning to the
As can be seen from fig. 3, the
Fig. 4 is a flow chart of a
According to the
Then, as described above, when there is a change to the power supply 310 of fig. 3, an indication of the change may be received by the
Fig. 5 is an illustration of a computing system 522 for input power scaling of a power delivery device according to an example of principles described herein. To achieve its desired functionality, computing system 522 includes various hardware components. In particular, computing system 522 includes a
Although the following description refers to a
Machine-
Referring to fig. 5, the monitoring
In some examples, the
The computing system 522 of fig. 5 may be part of a general purpose computer. However, in some examples, computing system 522 is part of an application specific integrated circuit.
In summary, using such a power monitoring device 1) increases the flexibility of the monitoring system by adapting to power supply devices with any rating; 2) accounting for power supply device switching; 3) reducing the part count on the circuit; and 4) reduced circuit complexity. It is contemplated, however, that the apparatus disclosed herein may address other problems and deficiencies in a number of technical areas.
The preceding description has been presented to illustrate and describe examples of the principles. This description is not intended to be exhaustive or to limit these principles to any precise form disclosed. Many modifications and variations are possible in light of the above teaching.
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