TWI458997B - Power consumption detecting apparatus and motherboard and fan board using the same - Google Patents

Description

Power consumption detecting device and motherboard and fan control board using same

A power consumption detecting device, in particular, relates to a power consumption detecting device capable of improving the accuracy of power consumption detection and a motherboard and a fan control board using the same.

For the current server system, it has been necessary to increase the power consumption of each module in the server system to know the working state of each module. Among them, the power consumption detection project can be performed on the entire server system, or on a single module, such as a motherboard, a fan control board, or a hard disk. By thus detecting the power consumption of each module, it is possible to allocate resources to the server system more safely and reasonably.

Generally, the server system reads and obtains the inter-integrated circuit (I2C) bus bar of the power supply unit (PSU) to calculate and obtain the modules in the server system. Power consumption, and then follow-up related operations. However, when the server system is running at high load, the power consumption detection of each module is performed, and the detected power consumption accuracy is OK, but there is still no way to achieve complete accuracy, sometimes work The error of the consumption detection will reach 15%. Therefore, there is still room for improvement in power consumption detection of each module in the server system.

In view of the above problems, the present disclosure provides a power consumption detecting device and a motherboard and a fan control board using the same, thereby simplifying the circuit structure and improving power consumption detection. The accuracy.

The power consumption detecting device of the present disclosure is adapted to detect the power consumption of a test object, and the working voltage is generated when the work to be tested. The power consumption detecting device includes a first resistor, an amplifying unit, a voltage dividing unit, and a processing unit. The first end of the first resistor is coupled to the object to be tested, and receives a current generated when the object to be tested operates. The first input end of the amplifying unit is coupled to the second end of the first resistor, the second input end of the amplifying unit receives the working voltage, and the output end of the amplifying unit generates the amplified signal. The voltage dividing unit is coupled to the output end of the amplifying unit for receiving the amplified signal and dividing the amplified signal to generate a voltage dividing signal. The processing unit is coupled to the voltage dividing unit for receiving the voltage dividing signal, and calculating the current flowing through the first resistor according to the level of the voltage dividing signal, and calculating the power consumption of the object to be tested according to the current and the operating voltage. .

In an embodiment, the voltage dividing unit includes a second resistor and a third resistor. The first end of the second resistor is coupled to the output end of the amplifying unit for receiving the amplified signal, and the second end of the second resistor is configured to output the voltage dividing signal. The first end of the third resistor is coupled to the second end of the second resistor, and the second end of the third resistor is coupled to the ground end.

In an embodiment, the amplifying unit is an operational amplifier.

In an embodiment, the voltage value of the amplified signal output by the amplifying unit is smaller than the voltage value of the operating voltage of the amplifying unit.

In an embodiment, the aforementioned processing unit includes a temporary register. This register is used to store the power consumption of the object to be tested.

One of the disclosed embodiments includes a motherboard of the aforementioned power consumption detecting device.

One of the present disclosure includes a fan control board of the aforementioned power consumption detecting device.

The power consumption detecting device of the present disclosure and the motherboard and the fan control board using the same, generate a voltage drop by the first resistor, so that a voltage difference is generated between the two input ends of the amplifying unit, and the voltage difference is amplified by the amplifying unit After the partial voltage is divided, the processing unit uses the current flowing through the first resistor and the working voltage generated by the object to be tested to calculate the power consumption of the corresponding object to be tested. In this way, the circuit structure can be simplified and the accuracy of power consumption detection can be improved.

The features and implementations of the present disclosure are described in detail below with reference to the drawings.

Please refer to "Figure 1" for a schematic diagram of the server system disclosed herein. The server system 100 can be a container server, and the server system 100 includes a motherboard (otherboard) 110, a fan board (Fan Board) 120, and a rack management controller (RMC) 130. The power consumption detecting device 140 of the present disclosure.

A power consumption detecting device 140 is configured on the motherboard 110 and the fan control panel 120 to perform power consumption detection on the motherboard 110 and the fan control panel 120. That is, after the motherboard 110 and the wind control panel 120 start working, the working voltage VIN generated by the motherboard 110 and the fan control panel 120 is output to the power consumption detecting device 140 connected thereto, so that the power consumption detecting device 140 can Power consumption detection is performed on the motherboard 110 and the fan control board 120 to calculate a power consumption value corresponding to the aforementioned operating voltage VIN, and the power consumption value is stored.

Next, when the power consumption detecting device 140 calculates the motherboard 110 and the fan control After the power consumption value of the board 120, the rack management controller 130 can read the corresponding power consumption value stored by the power consumption detecting device 140 to learn the working state of the motherboard 110 and the fan control board 120 and the corresponding work. The value is consumed, and subsequent operations are performed, for example, reducing the power of the motherboard 110 or reducing the rotation speed of the fan through the fan control panel 120.

In the embodiment of FIG. 1 , only one motherboard 110 and one fan control panel 120 are taken as an example, but the disclosure is not limited thereto, and the user can adjust the motherboard 110 and the fan control panel 120 according to their needs. The number, and the number of the power consumption detecting devices 140 are also adjusted corresponding to the number of the motherboard 110 and the fan control board 120, and the motherboard 110 or the fan control board 120 are respectively connected to a power consumption detecting device 140 to perform corresponding functions. Consumption detection.

In addition, the present disclosure is exemplified by the power consumption detecting device 140 for detecting power consumption of the motherboard 110 or the fan control board 120. However, the disclosure is not limited thereto, and the power consumption detecting device 140 may also perform other components in the server system 100. Power consumption detection.

In addition, in an embodiment, the power consumption detecting device 140 is detachably disposed on the motherboard 110 and the fan control board 120, and is coupled to the motherboard 110 and the fan control board 120, for example, through a connection port or a bus bar. In another embodiment, the power consumption detecting device 140 can be directly disposed on the motherboard 110 and the fan control board 120.

Hereinafter, the internal circuit configuration of the power consumption detecting device 140 of the present disclosure and its corresponding operation will be further explained. Also, for convenience of explanation, the motherboard 110 or the fan control panel 120 will be represented by the object to be tested 250.

Please refer to "FIG. 2", which is the power consumption detecting device 140 of the present disclosure. Detailed schematic. In this embodiment, when the object to be tested 250 (ie, the motherboard 110 or the fan control board 120) is operated, a working voltage VIN is generated. The power consumption detecting device 140 includes a first resistor R1, an amplifying unit 210, a voltage dividing unit 220, and a processing unit 230.

The first end of the first resistor R1 is adapted to receive the receiver 250 (ie, the motherboard 110 or the fan control panel 120), for example, a pin or a contact of the receiver 250 for receiving the object to be tested 250. The current I generated during operation, that is, the current I flows through the first resistor R1. In the present embodiment, the first resistor R1 is, for example, a precision resistor.

The first input end (eg, the positive input end) of the amplifying unit 210 is coupled to the second end of the first resistor R1, and the second input end (eg, the negative input end) of the amplifying unit 210 is coupled to the first end of the first resistor R1. For receiving the working voltage VIN generated by the object to be tested 250, the output end of the amplifying unit 210 generates an amplification signal VA.

In this embodiment, the amplifying unit 210 is, for example, an operation amplifier (OPA). Moreover, the voltage value of the amplification signal VA output by the amplification unit 210 is, for example, smaller than the voltage value of the operating voltage VCC of the amplification unit 210 to increase the accuracy of the power consumption detection.

The voltage dividing unit 220 is coupled to the amplifying unit 210 for receiving the amplifying signal VA and dividing the amplified signal VA to generate a voltage dividing signal VD. Further, the voltage dividing unit 220 includes a second resistor R2 and a third resistor R3. The first end of the second resistor R2 is coupled to the output end of the amplifying unit 210 for receiving the amplified signal VA, and the second end of the second resistor R2 is configured to generate the voltage dividing signal VD. The first end of the third resistor R3 is coupled to the second end of the second resistor R2, and the second end of the third resistor R3 is coupled to the ground GND.

The processing unit 230 is coupled to the voltage dividing unit 220 for receiving the foregoing voltage dividing signal. VD, and according to the voltage level of the voltage dividing signal VD, calculates the current I flowing through the first resistor R1, and calculates the power consumption of the object to be tested 250 according to the current I and the operating voltage VIN. Further, the processing unit 230 includes a register 240 for storing the power consumption of the object to be tested 250, so that the rack management controller 130 reads the object to be tested 250 stored in the register 240. Power consumption for subsequent related operations.

In this embodiment, since the effective input voltage range of the processing unit 230 is limited, the voltage division signal VD generated by dividing the amplification signal VA by the voltage dividing unit 220 can ensure the effective voltage input falling on the processing unit 230. Within the scope for subsequent processing.

In addition, in order to make the detection of the change of the current I more precise, the amplification unit 230 may require a larger amplification factor K, so that the voltage drop across the first resistor R1 is amplified by the amplification unit 230 (ie, the comparison between the two ends of the first resistor R1). A small voltage drop multiplied by a larger amplification factor K) can be apparently presented for subsequent power consumption calculations. Therefore, in this embodiment, the amplification factor K of the amplification unit 230 is not adjusted to adjust the amplification signal VA to increase the accuracy of the power consumption detection.

First, when the object to be tested 250 starts to work, the object to be tested 250 generates an operating voltage VIN and is output to the first end of the first resistor R1 and the second input terminal (negative input terminal) of the amplifying unit 210. Then, the first resistor R1 flows through a current I and generates a voltage drop, so that the voltage value received by the first input terminal (positive input terminal) of the amplifying unit 210 is the operating voltage VIN minus the voltage across the first resistor R1. Drop, that is, VIN-I ^* R1.

Thereafter, the amplifying unit 210 calculates the voltage received by the first input terminal and the second input terminal to calculate a voltage difference value (that is, the voltage drop I ^* R1 on the first resistor R1), and the amplifying unit 210 According to the amplification factor K, the voltage difference (the voltage drop across the first resistor) is multiplied by the amplification factor K to generate an amplification signal VA. Next, the voltage dividing unit 220 divides the amplified signal VA by using the second resistor R2 and the third resistor R3 to generate a voltage dividing signal VD.

Then, the processing unit 230 receives the voltage dividing signal VD, and calculates a current I flowing through the first resistor R1 according to the voltage level of the voltage dividing signal VD and the equations (1) and (2). Wherein, Equations (1) and (2) are as follows: VD=(I ^* R1 ^* K ^* R3)/(R2+R3) (1)

I=VD ^* (R2+R3)/(R1 ^* K ^* R3) (2)

Then, the processing unit 230 further calculates the power consumption of the object to be tested according to the current I and the operating voltage VIN, that is, the power consumption = the operating voltage VIN multiplied by the current I (VIN ^* I). Moreover, the processing unit 230 further stores the power consumption of the object to be tested 250 in the register 240 to record the power consumption corresponding to the object to be tested 250.

In this way, the power consumption detecting device 140 of the present disclosure performs power consumption detection on the object to be tested 250 (ie, the motherboard 110 or the fan controller 120), and sets the voltage value of the amplified signal VA output by the amplifying unit 210 to be less than the amplification. The voltage value of the operating voltage VCC of the unit 210 can reduce the error of the power consumption detection to 3%, so as to effectively improve the accuracy of the power consumption detection.

The power consumption detecting device of the embodiment of the present disclosure, and the motherboard and the fan control board using the same, generate a voltage drop by the first resistor, so that a voltage difference is generated between the two input ends of the amplifying unit, and the voltage difference is After being amplified by the amplifying unit, the voltage is divided, and then the processing unit is used according to the current flowing through the first resistor and the working power generated by the object to be tested. Press to calculate the power consumption of the corresponding object to be tested. In this way, the circuit structure can be simplified and the accuracy of power consumption detection can be improved.

The present disclosure is disclosed in the foregoing embodiments, and is not intended to limit the disclosure. Any subject matter of the present invention can be modified and retouched without departing from the spirit and scope of the disclosure. The scope of patent protection shall be subject to the definition of the scope of the patent application attached to this specification.

100‧‧‧Server system

110‧‧‧ motherboard

120‧‧‧Fan control panel

130‧‧‧Rack Management Controller

140‧‧‧Power consumption detection device

210‧‧‧Amplification unit

220‧‧‧Voltage unit

230‧‧‧Processing unit

240‧‧‧ register

250‧‧‧Test objects

R1‧‧‧first resistance

R2‧‧‧second resistance

R3‧‧‧ third resistor

VIN, VCC‧‧‧ working voltage

VA‧‧Amplified signal

VD‧‧‧ partial pressure signal

I‧‧‧current

GND‧‧‧ ground terminal

Figure 1 is a schematic diagram of the server system of the present disclosure.

FIG. 2 is a detailed schematic diagram of the power consumption detecting device of the present disclosure.

130‧‧‧Rack Management Controller

140‧‧‧Power consumption detection device

210‧‧‧Amplification unit

220‧‧‧Voltage unit

230‧‧‧Processing unit

240‧‧‧ register

250‧‧‧Test objects

R1‧‧‧first resistance

R2‧‧‧second resistance

R3‧‧‧ third resistor

VIN, VCC‧‧‧ working voltage

VA‧‧Amplified signal

VD‧‧‧ partial pressure signal

GND‧‧‧ ground terminal

Claims (7)

A power consumption detecting device is adapted to detect a power consumption of an object to be tested, and the object to be tested generates an operating voltage. The power consumption detecting device includes: a first resistor, the first end of which is coupled to the to-be-tested Receiving a current generated when the object to be tested is working; an amplifying unit having a first input coupled to the second end of the first resistor, a second input receiving the operating voltage, and an output terminal An amplification signal; a voltage dividing unit coupled to the output end of the amplifying unit for receiving the amplified signal, and dividing the amplified signal to generate a voltage dividing signal; and a processing unit coupled to the branch The pressing unit is configured to receive the voltage dividing signal, and calculate the current flowing through the first resistor according to the level of the voltage dividing signal, and calculate the work of the object to be tested according to the current and the working voltage Consumption. The power consumption detecting device of claim 1, wherein the voltage dividing unit comprises: a second resistor, the first end of which is coupled to the output end of the amplifying unit for receiving the amplified signal, and the second end outputs the And a third resistor, the first end of which is coupled to the second end of the second resistor, and the second end of which is coupled to the ground. The power consumption detecting device of claim 1, wherein the amplifying unit is an operational amplifier. The power consumption detecting device of claim 1, wherein the voltage value of the amplified signal output by the amplifying unit is smaller than the voltage value of the working voltage of the amplifying unit. The power consumption detecting device of claim 1, wherein the processing unit includes a temporary storage And storing power consumption of the object to be tested. A motherboard including the power consumption reducing device of any one of claims 1 to 5. A fan control panel comprising the power consumption reducing device of any one of claims 1 to 5.