Power consumption detection and control circuit

Abstract

The utility model relates to a power consumption detection and control circuit, which comprises a load interface, a detection module, a power supply module and a control module, a detection point of the detection module is connected with the load interface and judges whether the load interface is connected with a PCIE (Peripheral Component Interconnect Express) load, the power supply module is connected with the detection point and provides voltage for the detection point, and the detection module is connected with the control module. The control module is connected with the power supply module and controls the power supply module to provide corresponding voltage for operation of the whole machine. The beneficial effects are that the power consumption is judged by detecting whether a load (such as a display card) is inserted or not, and then the power consumption of the power supply and the load is controlled not to exceed the power consumption standard through circuit signal transmission to the control module.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit detection, in particular to a power consumption detection and control circuit. Background Art

[0002] The most important function of the power supply circuit of the main board is to provide electrical energy for the control module and the load, so that they can operate stably.

[0003] At present, there are various control module power supply circuits in the prior art. The basic principle is that when the computer is powered on, after the power management chip obtains the +5V or +12V power supply output of ATX, it provides voltage for the control module. Then, the voltage automatic recognition pin of the control module sends out a voltage recognition signal VID to the power management chip. The power management chip then issues a drive control signal according to the VID voltage of the control module, controls the conduction sequence and frequency of two field effect transistors, so that the output voltage reaches the core power supply requirement of the control module, and provides the power supply required for the operation of the control module.

[0004] However, the above prior art does not detect the power consumption of the load. When the load is connected, the power supply circuit is prone to exceed the power consumption standard of the power supply, which easily causes the power supply of the main board to be unstable during operation and affects the normal operation. Summary of the Utility Model

[0005] In order to solve the problems in the above background art, the utility model provides a power consumption detection and control circuit.

[0006] The solution adopted by the utility model to solve its technical problems is as follows:

[0007] Provide a power consumption detection and control circuit, including: a load interface, a detection module, a power supply module, and a control module. The detection point of the detection module is connected to the load interface and judges whether the load interface is connected to a PCI E load. The power supply module is connected to the detection point and provides voltage for the detection point. The detection module is connected to the control module, and the control module is connected to the power supply module and controls the power supply module to provide corresponding voltage for the operation of the whole machine.

[0008] Optionally, the detection point is also connected to a first resistor, and one end of the first resistor is grounded.

[0009] Optionally, at least one pin of the load interface is connected to the detection point and is also connected to a second resistor.

[0010] Optionally, the second resistor is grounded when the PCI E load is connected to the load interface.

[0011] Optionally, the detection module is connected to the control module through an SVID bus.

[0012] Optionally, at least one pin of the power supply module is connected to the detection point.

[0013] In summary, the beneficial effects of the present utility model are as follows: By detecting whether a load (such as a graphics card) is plugged in to judge the power consumption of the power supply, and then transmitting the circuit signal to the control module to control the power consumption of the entire power supply and the load not to exceed the power consumption standard of the power supply.

[0014] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present utility model in conjunction with the accompanying drawings and embodiments. The accompanying drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0016] Figure 1 is a schematic structural diagram of the power consumption detection and control circuit according to the first embodiment of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the power consumption detection and control circuit according to the second embodiment of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the power consumption detection and control circuit according to the third embodiment of the present utility model;

[0019] Figure 4 is a circuit diagram of the power supply interface according to the embodiment of the present utility model;

[0020] Figure 5 is a circuit diagram of the power supply switching unit according to the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0022] Such as Figure 1As shown, the utility model relates to a power consumption detection and control circuit 1, including: a load interface 11, a detection module 12, a power supply module 14, and a control module 13. In this embodiment, a detection point 121 of the detection module 12 is connected to the load interface 11 and determines whether the load interface 11 is connected to a PCI E load. The power supply module 14 is connected to the detection point 121 and provides a voltage for the detection point 121. The detection module 12 is connected to the control module 13, and the control module 13 is connected to the power supply module 14 and controls the power supply module 14 to provide a corresponding voltage for the operation of the whole machine.

[0023] In this embodiment, when the load interface 11 is connected to a PCI E load (such as a graphics card), the voltage at the detection point 121 changes, thereby triggering the detection function. The detection module 12 sends the detection information to the control module 13, and the control module 13 controls the power supply module 14 to select a corresponding voltage based on the detection information so that the whole machine can operate normally. For example, when the whole machine is equipped with a graphics card, it selects 180W (watts) of power supply, or when it is not equipped with a graphics card, it selects 120W (watts) of power supply.

[0024] In some embodiments, as shown in 2 and Figure 3 As shown, at least one pin of the power supply module 14 is connected to the detection point 121. The detection point 121 is also connected to a first resistor R1, and one end of the first resistor R1 is grounded. At least one pin of the load interface 11 is connected to the detection point 121 and is also connected to a second resistor R2. The second resistor R2 is grounded when the PCI E load is connected to the load interface 11.

[0025] In this embodiment, the power supply module 14 outputs a current source in proportion to the size of the output PCI E load. The output current will generate a voltage value on the first resistor R1. When the voltage reaches 1.6V (at this time, it corresponds to the maximum current that the power supply can provide), the detection module 12 will detect that the PCI E load is connected to the whole machine. Therefore, it is necessary to reduce the power consumption of the control module 13.

[0026] Specifically, when not equipped with a graphics card, the second resistor R2 is floating (i.e., Figure 2 As shown), the resistance value of the pull-down resistor at the detection point 121 is the same as the resistance value of the first resistor R1, and the resistance value of the first resistor R1 is a preset value (for example, 1.5 kΩ). When equipped with a graphics card, one end of the second resistor R2 is grounded (i.e., Figure 3 As shown), the resistance value of the first resistor R1 is a preset value (for example, 3 kΩ), and the resistance value of the pull-down resistor at the detection point 121 is the parallel resistance value of the first resistor R1 and the second resistor R2 (1 kΩ). Compared with not being equipped with a graphics card, the resistance value of the detection point 121 becomes smaller. At the same time, the current required to reach 1.6V will be amplified in the same proportion (i.e., 1.5 kΩ: 1 kΩ), and the amplification ratio is exactly the power consumption ratio of the two power adapters (i.e., 180W: 120W).

[0027] In some embodiments, the detection module 12 may be a power management chip. The power management chip has a PSYS detection function and a corresponding detection pin (PSYS pin). The detection point 121 in this embodiment may be the PSYS pin.

[0028] In some embodiments, the control module 13 may be the CPU of a computer.

[0029] It should be noted that the PSYS detection function is to limit the power consumption of the CPU when the overall power consumption of the whole machine will exceed the load capacity of the power supply itself, so as to reduce the overall power consumption of the whole machine to meet the requirements of the power supply.

[0030] In some embodiments, the detection module 12 is connected to the control module 13 through the SVID bus. That is, the detection module 12 is connected to the CPU through the SVID bus.

[0031] In some embodiments, the power supply module 14 includes a power supply interface 141 and a power supply switching unit 142, and the power supply interface 141 is an ATX_PWR interface.

[0032] As Figure 4 shown, the power supply interface 141 includes a PWR_OK pin, a PS_ON pin, a 12VSB pin, a 12V1 pin, a 12V2 pin, a 12V3 pin, a GND1 pin, a GND2 pin, a GND3 pin, a GND4 pin, and an I_PSU pin. Among them, the I_PSU pin is connected to the detection point 121.

[0033] In some embodiments, as Figure 5 shown, the power supply switching unit 142 includes a Schottky diode PD1, a field effect transistor PQ3, a field effect transistor PQ4, a resistor R267, a resistor R266, a resistor R269, a resistor R268, a resistor R270, a resistor R271, a resistor R272, a capacitor CE2, and a capacitor C313.

[0034] In this embodiment, the capacitor CE2 is connected to the source of the field effect transistor PQ3 and grounded. The cathode of the Schottky diode PD1 is connected to the source of the field effect transistor PQ3. The anode of the Schottky diode PD1 is connected to the 12VSB pin of the power supply interface. The drain of the field effect transistor PQ3 is connected to the 12V1 pin, 12V2 pin and 12V3 pin of the power supply interface. The gate of the field effect transistor PQ3 is connected to the drain of the field effect transistor PQ4 through the resistors R267 and R269. The source of the field effect transistor PQ3 is connected to the PWR_OK pin of the power supply interface through the resistors R266, capacitor C313 and resistor R268. The gate of the field effect transistor PQ3 is connected to the PWR_OK pin of the power supply interface through the resistors R267, R269, capacitor C313, resistor R268 and resistor R270. The resistors R271 and R272 are connected to the gate of the field effect transistor PQ4. The resistor R272 and the source of the field effect transistor PQ4 are grounded.

[0035] In the prior art, the P12V_DUAL circuit is prone to PSU power supply compatibility problems. The reason is that a large inrush current will be formed on the P12V_STBY network during the switching process of P12V_DUAL. In this embodiment, by using a Schottky diode to replace the PMOS for switching P12V_STBY to P12V_DUAL, the internal SOFTSTART of the PSU's own P12V_STBY can be borrowed to solve the problem of excessive inrush current.

[0036] In summary, the beneficial effects of the present utility model are as follows: By detecting whether a load (such as a graphics card) is inserted to judge the power consumption of the power supply, and then transmitting the circuit signal to the control module 13 to control the power consumption of the entire power supply unit and the load not to exceed the power consumption standard of the power supply.

[0037] The above-described embodiments are only the preferred embodiments of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantive changes and modifications made by those skilled in the art based on the present utility model fall within the protection scope of the present utility model.

Claims

1. A power consumption detection and control circuit, characterized in that Comprising: A load interface, a detection module, a power supply module, and a control module. The detection point of the detection module is connected to the load interface and determines whether the load interface is connected to a PCIE load. The power supply module is connected to the detection point and provides voltage to the detection point. The detection module is connected to the control module, and the control module is connected to the power supply module and controls the power supply module to provide corresponding voltage for the operation of the whole machine.

2. The power consumption detection and control circuit according to claim 1, wherein The detection point is also connected to a first resistor, and one end of the first resistor is grounded.

3. The power consumption detection and control circuit according to claim 1, wherein At least one pin of the load interface is connected to the detection point and is also connected to a second resistor.

4. The power consumption detection and control circuit according to claim 3, wherein The second resistor is grounded when the PCIE load is connected to the load interface.

5. The power consumption detection and control circuit according to claim 1, characterized in that The detection module is connected to the control module through an SVID bus.

6. The power consumption detection and control circuit according to claim 1, wherein At least one pin of the power supply module is connected to the detection point.

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