ATX Power Supply Unit

Abstract

The present invention relates to an ATX power supply device, the ATX power supply device comprises an ATX power supply circuit and a power supply switching circuit, the power supply switching circuit comprises a current detection module and a sampling selection module; wherein the current detection module is used to collect the first current information of the 12V DC voltage end in the 12VO interface and the second current information of the 5V DC voltage end in the ATX interface, compare and process the first current information and the second current information, and output a control signal according to the comparison result; the sampling selection module is used to select one of the voltage signals of the 12V DC voltage of the standby power supply circuit or the 5V DC voltage of the standby power supply circuit as a voltage sampling signal according to the control signal, and output the sampling signal to feed back to the standby power supply circuit. The present invention can effectively reduce the power consumption of the ATX power supply and improve the stability of the output voltage.

Description

Technical Field

[0001] The invention relates to the technical field of computer power supply equipment, in particular to an ATX power supply device. Background Art

[0002] ATX (Advanced Technology Extended) structure is a structural standard, which refers to a standard for the structure of a computer motherboard. Among them, ATX power supply is a power supply under the ATX structure, which is used to convert AC 220V power supply into DC 5V, 12V or -12V power supply used inside the computer.

[0003] Compared with AT power supply, ATX power supply has three more outputs: "+3.3V, +5VSB, PS-ONATX power supply". Among them, the "+3.3V" output is mainly used for memory, while the "+5VSB" and "PS-ON" outputs reflect the characteristics of ATX power supply. The most important feature of ATX power supply is that it does not use the traditional AC switch to control whether the power supply is working, but uses the combination of "+5VSB, PS-ON" to turn the power on and off. As long as the change of the "PS-ON" signal level is controlled, the power supply can be turned on and off. "PS-ON" turns on the power supply when it is less than 1V, and turns off the power supply when it is greater than 4.5V.

[0004] At present, the existing ATX power supply is equipped with a voltage conversion module for converting 12V voltage into 5V, 3.3V and -12V. When the ATX power supply only needs to provide 12V working voltage, the voltage conversion module will also work, causing the ATX power supply to generate unnecessary power consumption and affecting the output stability of the 12V voltage. Summary of the invention

[0005] Based on this, the present invention provides an ATX power supply device that overcomes the above technical problems or at least partially solves the above problems.

[0006] An ATX power supply device, comprising an ATX power supply circuit, the ATX power supply circuit comprising an ATX interface, a standby power supply circuit, a main control circuit, a voltage conversion module and a main power conversion circuit all connected to the ATX interface, the main control circuit being connected to the voltage conversion module and the main power conversion circuit, the ATX power supply device further comprising a power switching circuit,

[0007] The power switching circuit comprises:

[0008] 12VO interface, used as the output interface of 12V standard power supply voltage;

[0009] a current detection module, connected to both the ATX interface and the 12VO interface of the ATX power supply, for collecting first current information of the 12V DC voltage terminal in the 12VO interface and second current information of the 5V DC voltage terminal in the ATX interface, comparing and processing the first current information and the second current information, and outputting a control signal according to the comparison result; wherein the control signal includes a first control signal and a second control signal; and the first control signal is used to control the working state of the voltage conversion module in the ATX power supply;

[0010] a sampling selection module, connected to the standby power circuit of the ATX power supply and the current detection module, for receiving the second control signal, and selecting one of the 12V DC voltage of the standby power circuit or the 5V DC voltage of the standby power circuit as the voltage sampling signal according to the second control signal, and outputting the sampling signal to feed back to the standby power circuit;

[0011] A voltage stabilization sampling selection circuit is connected to the current detection module and the 12VO interface, and is connected to the ATX interface of the ATX power supply and the main power conversion circuit;

[0012] The control signal includes a third control signal, and the voltage stabilization sampling selection circuit is used to select one of the 12V voltage signals of the ATX interface or the 12V voltage signal of the 12VO interface as the voltage stabilization sampling signal according to the third control signal, and feed back the corresponding voltage stabilization sampling signal to the main power conversion circuit in the ATX power supply.

[0013] Preferably, the current detection module includes:

[0014] A first sampling unit, used for collecting first current information of a 12V DC voltage terminal in the 12VO interface, and outputting a first collection signal;

[0015] A second sampling unit is used to collect second current information of a 5V DC voltage end in the ATX interface voltage and output a second collection signal;

[0016] The signal processing unit is used to compare and process the first acquisition signal and the second acquisition signal, and output the control signal according to the comparison result.

[0017] Preferably, the first sampling unit comprises:

[0018] A first current sampling resistor, one end of which is connected to the 12V DC voltage in the 12VO interface, and the other end of which is connected to the 12V DC voltage of the standby power supply circuit;

[0019] The first operation circuit is used to sample the voltage at both ends of the first current sampling resistor and perform operation processing to output the first acquisition signal.

[0020] Preferably, the second sampling unit comprises:

[0021] A second current sampling resistor, one end of which is connected to the 5V DC voltage in the ATX interface, and the other end of which is connected to the 5V DC voltage of the standby power supply circuit;

[0022] The second operation circuit is used to sample the voltage at both ends of the second current sampling resistor and perform operation processing to output the second acquisition signal.

[0023] Preferably, the signal processing unit comprises:

[0024] A third operational amplifier, one input end of which is used to receive the first acquisition signal, and the other input end of which is used to receive the second acquisition signal. The third operational amplifier is used to compare the first acquisition signal with the second acquisition signal, and output the control signal from the output end of the third operational amplifier.

[0025] Preferably, the first operation circuit specifically includes:

[0026] A first operational amplifier, one input end of which is used to connect to a 12V DC voltage of a 12VO interface, and another input end of which is used to connect to a 12V DC voltage of a standby power circuit;

[0027] A second resistor, one end of which is used to connect to the 12V DC voltage of the standby power circuit;

[0028] A first PNP transistor, with a base connected to the output end of the first operational amplifier, an emitter connected to the other end of the second resistor, and a collector used to output a first acquisition signal;

[0029] The third resistor has one end connected to the collector of the first PNP transistor and the other end grounded.

[0030] Preferably, the second operation circuit specifically includes:

[0031] A second operational amplifier, one input end of which is used to connect to a 5V DC voltage of the ATX interface, and another input end of which is used to connect to a 5V DC voltage of the standby power circuit;

[0032] A fifth resistor, one end of which is used to connect to a 5V DC voltage of a standby power circuit;

[0033] A second PNP transistor, with a base connected to the output end of the second operational amplifier, an emitter connected to the other end of the fifth resistor, and a collector used to output a second acquisition signal;

[0034] The sixth resistor R6 has one end connected to the collector of the second PNP transistor and the other end grounded.

[0035] Preferably, the sampling selection module comprises:

[0036] A two-choice switch circuit A, one switch end is used to connect to the 12V DC voltage of the standby power supply circuit, the other switch end is used to connect to the 5V DC voltage of the standby power supply circuit, the output end is used to output the voltage sampling signal, and the controlled end is used to connect to the second control signal.

[0037] Preferably, the voltage stabilization sampling selection circuit comprises:

[0038] A two-choice switch circuit B, one switch end is used to access the 12V DC voltage of the ATX interface, the other switch end is used to access the 12V DC voltage in the 12VO interface, the output end is used to output the regulated voltage sampling signal to the main power conversion circuit, and the controlled end is used to access the third control signal.

[0039] The ATX power supply device provided by the present invention adds a power switching circuit, wherein the power switching circuit includes a 12VO interface, a current detection module and a sampling selection module. The 12VO interface is used as an output interface of a 12V standard power supply voltage. The current detection module is used to detect whether the ATX interface or the 12VO interface is providing the working voltage, and output a control signal. If it is detected that the 12VO interface is providing the working voltage, the voltage conversion module in the ATX power supply is controlled to be in a working state of shutting down the output, thereby reducing unnecessary power consumption. In addition, by setting the sampling selection module, the output stability of the voltage can be effectively enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a module structure diagram of a power switching circuit according to an embodiment;

[0041] Figure 2 is a structural diagram of a power switching circuit module in another embodiment;

[0042] Figure 3 is a specific circuit diagram of a current detection module according to an implementation mode;

[0043] Figure 4 FIG. 4 is a block diagram of an ATX power supply device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention is further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention and are not used to limit the present invention.

[0045] An embodiment of the present invention provides a power switching circuit.

[0046] Figure 1 FIG. 1 is a block diagram of a power switching circuit module according to an embodiment of the present invention. Figure 1-Figure 4 As shown,

[0047] An ATX power supply device, the ATX power supply device comprises an ATX power supply circuit, the ATX power supply circuit comprises an ATX interface, a standby power supply circuit, a main control circuit, a voltage conversion module and a main power conversion circuit connected to the ATX interface, the main control circuit is connected to the voltage conversion module and the main power conversion circuit, the ATX power supply device further comprises a power switching circuit, the power switching circuit comprises a current detection module 100, a sampling selection module 101, an I2VO interface 102 and a voltage stabilization sampling selection circuit 103, wherein:

[0048] The 12VO interface 102 is used as an output interface of a 12V standard power supply voltage;

[0049] The current detection module 100 is connected to both the ATX interface and the 12VO interface of the ATX power supply, and is used to collect first current information of the 12V DC voltage terminal 12Vsb in the 12VO interface and second current information of the 5V DC voltage terminal 5Vsb in the ATX interface, compare and process the first current information and the second current information, and output a control signal according to the comparison result; wherein the control signal includes a first control signal and a second control signal; the first control signal is used to control the working state of the voltage conversion module in the ATX power supply, and the working state of the voltage conversion module includes a working state in which the voltage conversion module is in voltage conversion and a working state in which the voltage conversion module is stopped;

[0050] A sampling selection module 101 is connected to the standby power circuit of the ATX power supply and the current detection module, and is used to receive the second control signal, and select one of the 12V DC voltage 12VsbDC of the standby power circuit or the 5V DC voltage 5VsbDC of the standby power circuit as the voltage sampling signal according to the second control signal, and output the sampling signal to feed back to the standby power circuit;

[0051] The voltage stabilization sampling selection circuit 103 is connected to the current detection module and the 12VO interface, and is connected to the ATX interface of the ATX power supply and the main power conversion circuit;

[0052] The control signal includes a third control signal, and the voltage stabilization sampling selection circuit is used to select one of the 12V voltage signals of the ATX interface or the 12V voltage signal of the 12VO interface as the voltage stabilization sampling signal according to the third control signal, and feed back the corresponding voltage stabilization sampling signal to the main power conversion circuit in the ATX power supply.

[0053] The ATX power supply device in this embodiment adds a power switching circuit, which includes a 12VO interface, a current detection module and a sampling selection module. The 12VO interface is used as an output interface of a 12V standard power supply voltage. The current detection module is used to detect whether the ATX interface or the 12VO interface is providing the working voltage, and output a control signal. If it is detected that the 12VO interface is providing the working voltage, the voltage conversion module in the ATX power supply is controlled to be in a working state of shutting down the output (i.e. stopping working), thereby reducing unnecessary power consumption; the sampling selection module is used to select the corresponding voltage sampling signal (12VsbD of the standby power supply circuit) C or 5VsbDC of the standby power supply circuit) to enhance the stability of the output voltage; for example, when it is detected that the 5V working voltage is provided by the 5V DC voltage terminal 5Vsb of the ATX interface, the 5VsbDC of the standby power supply circuit is selected as the voltage sampling signal to enhance the output stability of the 5V voltage; when it is detected that the 12V working voltage is provided by the 12V DC voltage terminal 12Vsb of the 12VO interface, the 12VsbDC of the standby power supply circuit is selected as the voltage sampling signal to enhance the output stability of the 12V voltage; in addition, the voltage stabilization sampling selection circuit 103 is also used to select the corresponding voltage stabilization sampling signal, which can effectively enhance the output stability of the 12V voltage. When the current detection module 100 detects that the 12VO interface is providing a 12V operating voltage, the voltage stabilization sampling selection circuit 103 selects the 12V voltage in the 12VO interface as a voltage stabilization sampling signal. When the current detection module 100 detects that the ATX interface is providing a 12V operating voltage, the voltage stabilization sampling selection circuit 103 selects the 12V voltage in the ATX interface as a voltage stabilization sampling signal to effectively improve the output stability of the 12V voltage.

[0054] In a specific embodiment, Figure 4 As shown, the voltage stabilization sampling of the voltage stabilization sampling selection circuit selects the 12V voltage of the ATX interface or the 12V voltage of the 12VO interface as the voltage stabilization sampling signal through the 12V sampling 1 interface and the 12V sampling 2 interface.

[0055] In one embodiment, the first control signal is output to the main control circuit of the ATX power supply, and the main control circuit controls the working state of the voltage conversion module (the voltage conversion module is in the working state of starting or stopping working) according to the first control signal.

[0056] In the ATX power supply, the voltage conversion module converts the 12V voltage into 5V, 3.3V, and -12V. When the current detection module 100 detects that the 12VO interface is in working state, the first control signal is output to the main control circuit, and the main control circuit is used to control the voltage conversion module to stop working. There is no need for the voltage conversion module to convert the 12V voltage into 5V, 3.3V, and -12V voltages and output them to the ATX interface, thereby effectively reducing the overall power consumption of the ATX power supply.

[0057] It should be noted that the working state of the voltage conversion module can be controlled according to the first control signal, and can also be controlled by other control devices. It is not necessary to control it through the main control circuit in the ATX power supply. In specific applications, it can be selected according to actual needs. For example, a voltage conversion module control module can be set up to control the output of the first control signal to the voltage conversion module control module, and the voltage conversion module control module controls the working state of the voltage conversion module according to the first control signal.

[0058] In one embodiment, the sampling selection module 101 includes:

[0059] A two-choice switch circuit A, one switch end is used to connect to the 12V DC voltage 12VsbDC of the standby power supply circuit, the other switch end is used to connect to the 5V DC voltage 5VsbDC of the standby power supply circuit, the output end is used to output the voltage sampling signal, and the controlled end is used to connect to the second control signal.

[0060] Among them, the sampling selection module 101 selects a switch end and an output end to conduct according to the second control signal. In one embodiment, the two-choice switch circuit A includes two output ends, and the sampling selection module 101 respectively conducts the switch end and the output end one by one according to the second control signal to obtain the output of two voltage sampling signals of 12V DC voltage 12VsbDC and 5V DC voltage 5VsbDC; or conducts the selected switch end and the output end separately to obtain the output of one voltage sampling signal (12V DC voltage 12VsbDC or 5V DC voltage 5VsbDC).

[0061] In one specific embodiment, the two-choice switch in the two-choice switch circuit A includes a two-choice analog switch chip or a single-pole double-throw relay. Taking the two-choice switch as a two-choice analog switch chip as an example, the channel of the two-choice analog switch chip realizes the switch end and output end of the two-choice switch, and the enable end or selection input end of the two-choice analog switch chip realizes the controlled end of the two-choice switch. The same is true for the two-choice switch using a single-pole double-throw relay.

[0062] In one specific embodiment, the voltage stabilization sampling selection circuit includes:

[0063] A two-choice switch circuit B, one switch end is used to access the 12V DC voltage of the ATX interface, the other switch end is used to access the 12V DC voltage in the 12VO interface, the output end is used to output the regulated voltage sampling signal to the main power conversion circuit, and the controlled end is used to access the third control signal.

[0064] The two-to-one switch in the two-to-one switch circuit B can be the same as or similar to the two-to-one switch in the two-to-one switch circuit A, and will not be described in detail here.

[0065] In one embodiment, as shown in the attached Figure 2 As shown, the current detection module 100 includes:

[0066] A first sampling unit 200 is used to collect first current information of a 12V DC voltage terminal in the 12VO interface and output a first collection signal;

[0067] The second sampling unit 201 is used to collect the second current information of the 5V DC voltage end in the ATX interface voltage and output a second collection signal;

[0068] The signal processing unit 202 is used to compare the first acquisition signal with the second acquisition signal and output the control signal according to the comparison result. The signal processing unit 202 can be a signal processing device such as a comparator, an operational amplifier or a signal processing chip.

[0069] In a specific embodiment, as shown in the attached Figure 3 As shown, the first sampling unit 200 includes:

[0070] A first current sampling resistor R1, one end of which is connected to the 12V DC voltage 12Vsb in the 12VO interface, and the other end of which is connected to the 12V DC voltage 12VsbDC of the standby power circuit;

[0071] The first operation circuit is used to sample the voltage at both ends of the first current sampling resistor and perform operation processing to output the first acquisition signal.

[0072] Similarly, the second sampling unit 201 includes:

[0073] A second current sampling resistor R4, one end of which is connected to the 5V DC voltage 5Vsb in the ATX interface, and the other end of which is connected to the 5V DC voltage 5VsbDC of the standby power circuit;

[0074] The second operation circuit is used to sample the voltage at both ends of the second current sampling resistor and perform operation processing to output the second acquisition signal.

[0075] In a specific embodiment, Figure 3 As shown, the first operation circuit specifically includes:

[0076] The first operational amplifier U1A has one input terminal for connecting to the 12V DC voltage 12Vsb of the 12VO interface, and another input terminal for connecting to the 12V DC voltage 12VsbDC of the standby power circuit;

[0077] A second resistor R2, one end of which is used to connect to a 12V DC voltage 12VsbDC of a standby power circuit;

[0078] A first PNP transistor Q1, with a base connected to the output end of the first operational amplifier U1A, an emitter connected to the other end of the second resistor R2, and a collector for outputting a first acquisition signal;

[0079] The third resistor R3 has one end connected to the collector of the first PNP transistor Q1 and the other end grounded.

[0080] The first PNP transistor Q1 is used for voltage shifting to shift the 12V DC voltage 12VsbDC of the standby power circuit to a ground reference.

[0081] Similarly, if Figure 3 The second operation circuit shown includes:

[0082] The second operational amplifier U1B has one input terminal for connecting to the 5V DC voltage 5Vsb of the ATX interface, and another input terminal for connecting to the 5V DC voltage 5VsbDC of the standby power circuit;

[0083] A fifth resistor R5, one end of which is used to connect to a 5V DC voltage 5VsbDC of a standby power circuit;

[0084] A second PNP transistor Q2, with a base connected to the output end of the second operational amplifier U1B, an emitter connected to the other end of the fifth resistor R5, and a collector for outputting a second acquisition signal;

[0085] The sixth resistor R6 has one end connected to the collector of the second PNP transistor Q2 and the other end grounded.

[0086] Similarly, the second PNP transistor Q2 is used for voltage shifting to shift the 5V DC voltage 5VsbDC of the standby power circuit to the ground reference.

[0087] Specifically, the signal processing unit includes:

[0088] The third operational amplifier U1C has one input end for receiving the first acquisition signal and another input end for receiving the second acquisition signal. The third operational amplifier is used to compare the first acquisition signal with the second acquisition signal, and outputs the control signal from the output end of the third operational amplifier.

[0089] In one specific embodiment, Figure 4 As shown, the ATX power supply circuit includes an EMI module, a rectifier and PFC module, a standby power supply circuit, a main power conversion circuit, a voltage conversion module, a main control circuit and an AXT interface; in this embodiment, the ATX power supply circuit is a circuit module in the prior art, and the connection relationship of each circuit in the ATX power supply circuit is as shown in the attached Figure 4 As shown, no further details are given here.

[0090] The ATX power supply device provided by the embodiment of the present invention adds a power switching circuit, wherein the power switching circuit includes a 12VO interface, a current detection module and a sampling selection module. The 12VO interface is used as a 12VO interface of the output interface of the 12V standard power supply voltage. The current detection module is used to detect whether the ATX interface or the 12VO interface is providing the working voltage, and output a control signal to control the working state of the voltage conversion module in the ATX power supply. If it is detected that the 12VO interface is providing the working voltage, the voltage conversion module in the ATX power supply is controlled to be in a closed output working state, thereby reducing unnecessary power consumption. consumption; at the same time, by setting a sampling selection module, a corresponding voltage sampling signal (12VsbDC of the standby power supply circuit or 5VsbDC of the standby power supply circuit) is selected to enhance the stability of the output voltage; for example, when it is detected that the 5V DC voltage terminal 5Vsb of the ATX interface provides a 5V working voltage, the 5VsbDC of the standby power supply circuit is selected as the voltage sampling signal to enhance the output stability of the 5V voltage; when it is detected that the 12V DC voltage terminal 12Vsb of the 12VO interface provides a 12V working voltage, the 12VsbDC of the standby power supply circuit is selected as the voltage sampling signal to enhance the output stability of the 12V voltage.

[0091] In addition, the power switching circuit is also provided with a voltage stabilization sampling selection circuit to select a corresponding voltage stabilization sampling signal to effectively enhance the output stability of the 12V voltage: when the current detection module detects that the 12VO interface is providing a 12V working voltage, the voltage stabilization sampling selection circuit selects the 12V voltage in the 12VO interface as the voltage stabilization sampling signal; when the current detection module 100 detects that the ATX interface is providing a 12V working voltage, the voltage stabilization sampling selection circuit selects the 12V voltage in the ATX interface as the voltage stabilization sampling signal to effectively improve the output stability of the 12V voltage.

[0092] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the inventive concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An ATX power supply device, comprising an ATX power supply circuit, the ATX power supply circuit comprising an ATX interface, a standby power supply circuit, a main control circuit, a voltage conversion module and a main power conversion circuit all connected to the ATX interface, the main control circuit being connected to the voltage conversion module and the main power conversion circuit, characterized in that: The ATX power supply device further includes a power switching circuit, which includes: 12VO interface, used as the output interface of 12V standard power supply voltage; a current detection module, connected to both the ATX interface and the 12VO interface of the ATX power supply, for collecting first current information of the 12V DC voltage terminal in the 12VO interface and second current information of the 5V DC voltage terminal in the ATX interface, comparing and processing the first current information and the second current information, and outputting a control signal according to the comparison result; wherein the control signal includes a first control signal and a second control signal; and the first control signal is used to control the working state of the voltage conversion module in the ATX power supply; a sampling selection module, connected to the standby power circuit of the ATX power supply and the current detection module, for receiving the second control signal, and selecting one of the 12V DC voltage of the standby power circuit or the 5V DC voltage of the standby power circuit as the voltage sampling signal according to the second control signal, and outputting the sampling signal to feed back to the standby power circuit; A voltage stabilization sampling selection circuit is connected to the current detection module and the 12VO interface, and is connected to the ATX interface of the ATX power supply and the main power conversion circuit; The control signal includes a third control signal, and the voltage stabilization sampling selection circuit is used to select one of the 12V voltage signal of the ATX interface or the 12V voltage signal of the 12VO interface as the voltage stabilization sampling signal according to the third control signal, and feed back the corresponding voltage stabilization sampling signal to the main power conversion circuit in the ATX power supply; The sampling selection module comprises: A two-choice switch circuit A, one switch end is used to connect to the 12V DC voltage of the standby power supply circuit, the other switch end is used to connect to the 5V DC voltage of the standby power supply circuit, the output end is used to output the voltage sampling signal, and the controlled end is used to connect to the second control signal.

2. The ATX power supply device according to claim 1, characterized in that: The current detection module comprises: A first sampling unit, used for collecting first current information of a 12V DC voltage terminal in the 12VO interface, and outputting a first collection signal; A second sampling unit is used to collect second current information of a 5V DC voltage end in the ATX interface voltage and output a second collection signal; The signal processing unit is used to compare and process the first acquisition signal and the second acquisition signal, and output the control signal according to the comparison result.

3. The ATX power supply device according to claim 2, characterized in that: The first sampling unit comprises: A first current sampling resistor, one end of which is connected to the 12V DC voltage in the 12VO interface, and the other end of which is connected to the 12V DC voltage of the standby power supply circuit; The first operation circuit is used to sample the voltage at both ends of the first current sampling resistor and perform operation processing to output the first acquisition signal.

4. The ATX power supply device according to claim 2, characterized in that: The second sampling unit comprises: A second current sampling resistor, one end of which is connected to the 5V DC voltage in the ATX interface, and the other end of which is connected to the 5V DC voltage of the standby power supply circuit; The second operation circuit is used to sample the voltage at both ends of the second current sampling resistor and perform operation processing to output the second acquisition signal.

5. The ATX power supply device according to claim 2, characterized in that: The signal processing unit comprises: A third operational amplifier, one input end of which is used to receive the first acquisition signal, and the other input end of which is used to receive the second acquisition signal. The third operational amplifier is used to compare the first acquisition signal with the second acquisition signal, and output the control signal from the output end of the third operational amplifier.

6. The ATX power supply device according to claim 3, characterized in that: The first operation circuit specifically includes: A first operational amplifier, one input end of which is used to connect to a 12V DC voltage of a 12VO interface, and another input end of which is used to connect to a 12V DC voltage of a standby power circuit; A second resistor, one end of which is used to connect to the 12V DC voltage of the standby power circuit; A first PNP transistor, with a base connected to the output end of the first operational amplifier, an emitter connected to the other end of the second resistor, and a collector used to output a first acquisition signal; The third resistor has one end connected to the collector of the first PNP transistor and the other end grounded.

7. The ATX power supply device according to claim 4, characterized in that: The two operation circuits specifically include: A second operational amplifier, one input end of which is used to connect to a 5V DC voltage of the ATX interface, and another input end of which is used to connect to a 5V DC voltage of the standby power circuit; A fifth resistor, one end of which is used to connect to a 5V DC voltage of a standby power circuit; A second PNP transistor, with a base connected to the output end of the second operational amplifier, an emitter connected to the other end of the fifth resistor, and a collector used to output a second acquisition signal; The sixth resistor R6 has one end connected to the collector of the second PNP transistor and the other end grounded.

8. The ATX power supply device according to claim 1, characterized in that: The voltage stabilization sampling selection circuit comprises: A two-choice switch circuit B, one switch end is used to access the 12V DC voltage of the ATX interface, the other switch end is used to access the 12V DC voltage in the 12VO interface, the output end is used to output the regulated voltage sampling signal to the main power conversion circuit, and the controlled end is used to access the third control signal.

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