TW201409220A - Method for determining power supply status and module thereof - Google Patents

Abstract

The present invention provides a method for determining power supply status and module thereof, which are mainly used to determine the status change of a power supply caused by the variation external power source. The present invention compares a first, a second and a third comparison potential with a voltage regulation potential of a voltage regulation and energy storage element in a power factor correction unit, and determines the power supply status based on the comparison result of the voltage regulation potential with the first, the second and the third comparison potential, and then generates an external power supply abnormal signal, a power supply abnormal signal and a power failure alert signal according to the status. Each of the abnormal signals may be used for loading allocation operation of a motherboard, and the power failure alert signal may stop the operation of the power supply in advance. Thus, the present invention may solve the conventional problems, such as easily delayed reporting, inaccurate determination or complex composition of determination circuit.

Description

Method for judging power supply state and its module

The invention relates to a method for judging the state of a power supply and a module thereof, in particular to a method and a module for determining the state of a power supply by using a power correction unit to stabilize the potential of the energy storage device.

In the face of the ever-increasing technology, electronic devices (such as central processing units, graphics processors, hard drives and other electronic devices) have higher and higher requirements on power quality. The instability of input power quality leads to the power quality of the power supply. Unstable, the power quality is unstable, which leads to the malfunction of the electronic device. In the meantime, the electronic device will be ineffectively terminated. In addition, the data of the current operation will be lost or damaged, and the structure of the electronic device may be damaged.

In order to avoid irreparable problems caused by the sudden failure of the power supply, today's motherboards require the power supply to provide status information (commonly known as PG signal, Power Good) for management monitoring, to avoid sudden failure of the power supply and cause problems. After receiving the status information of the marked abnormality, the motherboard performs a load reduction operation, such as reducing the fan speed, stopping the power supply to the idle electronic device, and avoiding the rapid failure of the power supply. During this time, the host The board can be turned off for electronic devices that are still in operation. Please refer to FIG. 1 , which is a schematic diagram of the implementation of the state judgment of the conventional power supply. Generally, the method for determining the state of the power supply is to electrically connect a determination module 17 to a rectification output unit of a power supply 1 . 16 or a secondary side of a transformer 13 and simultaneously receiving power for state determination, but the external power needs to pass through a multi-stage circuit (such as the rectification and filtering unit 11, the power factor correction unit 12, the primary side of the transformer 13, etc.) As a result, the rectification output unit 16 or the secondary side of the transformer 13 causes the judgment reaction time to be too late, and it is impossible to notify a motherboard 3 that the power supply is abnormal when the external power source 10 has a problem. To this end, some inventors have focused on the power supply 3 transformer 13 primary side front-end circuit (meaning rectification filter unit 11, power factor correction unit 12, etc.) to make the test results more in line with the current supply input, but The power supply input usually has a high potential, and not all electronic components can withstand high potentials. In addition, the power supply 1 is not necessarily a DC power input. If the AC power is input, the judging module needs to add a multi-stage filter circuit to eliminate the noise, which is easy to cause the circuit to be complicated and the multi-stage circuit transmission causes the reaction time to pass. Long, it is easy to produce problems with the evening newspaper, and the difference in the frequency of the alternating current will also lead to the occurrence of inaccurate judgment results. On the other hand, the method for judging the state of the power supply is generally only set to a determination point, which often causes the external power source 10 to change slightly, and then outputs an abnormal signal, and it is easy to misjudge whether the external power source 10 does fail.

The main object of the present invention is to provide a judging method and module that are more accurate and conform to the current state of the input end of the power supply.

The secondary object of the present invention is to solve the problem that the current power supply judging module judges the potential of the output end of the power supply, easily generates the evening report, and overcomes the problem that the current power supply is easy to generate the circuit if the power supply is under the alternating current input. complicated question.

In order to achieve the above object, the present invention provides a method for judging a state of a power supply, the method for determining a power supply, the power supply including a power supply having a constant potential after being energized in a power correction unit And a pulse width control unit for driving the power supply for power conversion, and the power supply is electrically connected to a motherboard, and the determining method comprises the steps of:

a) establishing a comparison potential step: establishing a first comparison potential, a second comparison potential smaller than the first comparison potential, and a third comparison potential smaller than the second comparison potential;

b) obtaining a voltage stabilizing potential step: obtaining a voltage stabilizing potential of a voltage stabilizing energy storage component during a power supply operation;

c) judging the external power supply step: comparing the voltage stabilizing potential with the first comparison potential, if it is less than the first comparison potential, determining an external power supply abnormal state, and generating a power supply abnormal signal to transmit to the power supply information Connected motherboard;

d) judging the power supply performance step: comparing the regulated potential with the second comparison potential, if less than the second comparison potential is determined to be a power supply performance abnormal state, and generating a performance abnormal signal is transmitted to the motherboard;

e) judging the power supply failure step: comparing the voltage stabilization potential with the third comparison potential, if less than the third comparison potential is determined to be a power failure state, and generating a power failure warning signal to the pulse width of the power supply control unit.

In an embodiment, the step of establishing a comparison potential step is performed before the step of generating a partial voltage to generate a comparison potential: receiving a reference potential to generate the first, second, and third comparison potentials by a comparison potential generating circuit.

In an embodiment, the step of establishing a comparison potential further comprises the step of generating a first comparison potential by dividing the voltage by receiving a reference potential to generate the first comparison potential via a first comparison potential generating circuit.

In an embodiment, the step of establishing a comparison potential further comprises the step of generating a second comparison potential by dividing the voltage by receiving a reference potential to generate the second comparison potential via a second comparison potential generating circuit.

In an embodiment, the step of establishing a comparison potential further comprises the step of generating a second comparison potential by dividing the voltage by receiving a reference potential by a third comparison potential generating circuit to generate the third comparison potential.

In an embodiment, the step of obtaining the regulated potential step further comprises a step of dividing the voltage: receiving the voltage-stabilized potential by an equivalent voltage-stabilizing circuit to generate an equivalent voltage-stabilizing potential.

To achieve the above object, the present invention provides a power supply state determination module for use in a power supply, the power supply including a regulated energy storage component that receives a power correction unit output power and has a regulated potential And a pulse width control unit for driving the power supply for power conversion, and the power supply is electrically connected to a motherboard. The judgment module includes an external power supply detecting unit, a power supply performance detecting unit, and a power failure detecting unit, wherein the external power detecting unit has a first comparison potential, and is electrically connected to the voltage stabilizing energy storage component and the host The board receives the potential of the voltage stabilizing energy storage component and compares the potential with the first comparison potential to generate an external power supply abnormal signal to be transmitted to the motherboard. The power supply performance detecting unit has a second comparison potential electrically connected to the voltage stabilizing energy storage component and the motherboard, and the voltage stabilizing potential of the voltage stabilizing energy storage component is compared with the second comparison potential to generate a potential comparison. A power supply abnormality signal is transmitted to the motherboard. The power failure detecting unit has a third comparison potential electrically connected to the voltage stabilizing energy storage component and the pulse width control unit, and receives a voltage stabilizing potential of the voltage stabilizing energy storage component and a potential comparison of the third comparison potential to generate a potential A power failure warning signal is transmitted to the pulse width control unit.

In one embodiment, the determining module includes an electrical connection detecting the external power detecting module, the power supply performance detecting unit, and the power failure detecting unit, and receiving a reference potential from the power supply to generate the first A comparison potential generating circuit of the second and third comparison potentials.

In one embodiment, the determining module includes a first comparison potential generating circuit electrically connected to the external power detecting unit and receiving a reference potential from the power supply to generate the first comparison potential.

In one embodiment, the determining module includes a second comparison potential generating circuit electrically connected to the power supply performance detecting unit and receiving a reference potential from the power supply to generate the second comparison potential.

In one embodiment, the determining module includes a third comparison potential generating circuit electrically connected to the power failure detecting unit and receiving a reference potential from the power supply to generate the third comparison potential.

In an embodiment, the determining module includes an electrically connected voltage stabilizing energy storage component to receive the voltage stabilizing potential and is divided and converted into an equivalent regulated potential output to the external power detecting unit, and the power supply performance detecting The unit and the equivalent steady-potential potential generating circuit of the power failure detecting unit.

In an embodiment, the external power supply detecting unit, the power supply performance detecting unit, and the power failure detecting unit are respectively a logic circuit.

In an embodiment, the external power supply detecting unit, the power supply performance detecting unit, and the power failure detecting unit may each be a comparator.

The method for judging the state of the power supply of the present case and the module thereof are characterized by the following embodiments:

First, quickly and accurately determine the status of the power supply. The invention utilizes the voltage stabilizing potential of the voltage stabilizing energy storage element in the power factor correcting unit to judge and compare. Compared with the current embodiment, the invention obtains the voltage stabilizing potential through a circuit with fewer stages, and the reflection time is shorter than the existing implementation. The way, and the change of the regulated potential is more in line with the change of the AC power input, and an accurate judgment can be made.

Second, a simple implementation of the circuit. Although the invention performs the judgment and detection on the input end of the power supply, the logic component is matched with the voltage dividing circuit to make the circuit of the overall judgment module relatively simple.

The detailed description and technical contents of the present invention will now be described as follows:

Referring to FIG. 2 and FIG. 3, FIG. 2 is a block diagram (1) and (2) of a first embodiment of a power supply state judging module according to the present invention. As shown in the figure, a judgment mode of a power supply state is disclosed. The group is applied to a power supply 1. The power supply 1 generally includes a rectifying and filtering unit 11 connected to the external power source 10, a power factor correcting unit 12 connected to the rectifying and filtering unit 11, a transformer 13, and a pulse. The wide control unit 14 , a switching element 15 and a rectifying output unit 16 , wherein the power factor correcting unit 12 includes a voltage stabilizing energy storage element 121 . The AC power outputted by the external power source 10 is rectified and converted into DC power by the rectifying and filtering unit 11, and the power factor and voltage of the DC power are adjusted through a voltage changing power level inside the power factor correcting unit 12, and the voltage stabilizing energy storage component is adjusted. 121 receives the DC power after the power factor correction and stores it, and generates a regulated potential 122 according to the DC power potential. The switching element 15 is controlled by the pulse width control unit 14 to adjust the coil current through the transformer 13, and finally generates an operating power output to the motherboard 3 via the rectification output unit 16.

On the other hand, the judgment module 2 of the present invention includes an external power supply detecting unit 21, a power supply performance detecting unit 22, and a power failure detecting unit 23, the external power detecting unit 21, and the power supply performance detecting unit. And the power failure detecting unit 23 is electrically connected to the voltage stabilizing energy storage component 121 in the power factor correcting unit 12, and receives the voltage regulator generated by the voltage stabilizing energy storage component 121 during the power supply 1 operation. Potential 122. The external power supply detecting unit 21, the power supply performance detecting unit 22, and the power failure detecting unit 23 can be respectively a logic circuit or a comparator, and a signal is generated after being activated, and the generated signal will be detailed later. Explain, there is no more description.

The external power supply detecting unit 21 and the power supply performance detecting unit 22 are respectively connected to the motherboard 3, and the power failure detecting unit 23 is connected to the pulse width control unit 14 of the power supply 1 to separate the signals. It is transmitted to the motherboard 3 and the pulse width control unit 14. The external power supply detecting unit 21 has a first comparison potential that is compared with the potential of the regulated potential 122. The power supply performance detecting unit 22 has a second comparison potential that is compared with the potential of the regulated potential 122. The power failure detecting unit 23 has a third comparison potential that is compared with the potential of the regulated potential 122. Further, in order to generate the first, second, and third comparison potentials, the determining module 2 of the present invention may further include an electrical connection detecting the external power detecting unit 21, the power supply performance detecting unit 22, and the power supply failure. The comparison potential generating circuit 24 of the detecting unit 23, the comparison potential generating circuit 24 may actually be a voltage dividing circuit, after receiving a reference potential 18 from the power supply device 1, and then dividing the voltage to generate the voltage dividing section. First, second and third comparison potentials. However, the embodiment in which the potential is used to generate the comparative potential is not described in detail herein. In addition, the reference potential 18 described in the present invention may be the standing power (referred to as VSTB) generated by the power supply 1 or the like, but is not limited thereto. In the embodiment, the first, second, and third comparison potentials are generated by the single voltage dividing circuit, but are not limited thereto.

4 is a circuit block diagram of a second embodiment of the power supply state determination module of the present invention. Further, the determination module 2 includes a first electrical connection to the external power supply detecting unit 21 a comparison potential generating circuit 25, a second comparison potential generating circuit 26 electrically connected to the power supply performance detecting unit 22, and a third comparison potential generating circuit 27 electrically connected to the power failure detecting unit 23, and the first The first and second comparison potential generating circuits 25, 26, and 27 respectively obtain the reference potential 18 from the power supply 1, and generate the first, second, and third comparison potentials after dividing the voltage.

Please refer to FIG. 5 , which is a circuit block diagram of a third embodiment of the power supply state determination module of the present invention. The general power supply 1 is mostly an AC input DC output. If the input is an effective rms value of 220V AC power, The energy storage potential of the voltage stabilizing energy storage element 121 during the conversion process is as high as 311V. If the external power supply detecting unit 21, the power supply performance detecting unit 22, and the power failure detecting unit 23 fail to withstand such high voltage power, the determining module 2 of the present invention further includes an electrical connection to the voltage stabilizing energy storage component 121. The external power supply detecting unit 21, the power supply performance detecting unit 22, and the equivalent regulated potential generating circuit 28 of the power fail detecting unit 23. The equivalent regulated potential generating circuit 28 can be a voltage dividing circuit. After receiving the voltage stabilizing potential 122 from the voltage stabilizing energy storage element 121 and dividing the voltage, an equivalent voltage stabilizing potential is generated, and the equivalent voltage regulator is generated. The ratio of the potential to the regulated potential 122 can be designed in conjunction with the comparative potential generating circuit 24 of the present invention or the first, second and third comparative potential generating circuits 25, 26, 27 to ensure accurate judgment. However, the equivalent regulated potential generating circuit 28 can also be implemented in the first and second embodiments.

Referring to FIG. 1 and FIG. 2, in addition to providing a power supply state determination module 2, the present invention further provides a determination method implemented by the determination module 2, and the detailed description is as follows, and please also refer to FIG. 6 is a schematic diagram showing the operation of the first embodiment of the method for determining the state of the power supply of the present invention:

a) establishing a comparison potential step S40: first establishing the first, second and third comparison potentials, the second comparison potential is smaller than the first comparison potential, and the third comparison potential is smaller than the second comparison potential, that is to say The first, second, and third comparison potentials are sequentially arranged. After the first, second, and third comparison potentials are established, the external power supply detecting unit 21 has the first comparison potential, and the power supply performance is The detecting unit 22 has the second comparison potential, and the power failure detecting unit 23 has the third comparison potential;

b) obtaining a voltage stabilizing potential step S41: the external power supply detecting unit 21, the power supply performance detecting unit 22 and the power failure detecting unit 23 are electrically connected to the voltage stabilizing energy storage element 121 to receive the voltage stabilizing energy storage element 121 The regulated potential 122 produced during the operation of the power supply 1;

c) determining the external power supply step S42: after the external power supply detecting unit 21 receives the voltage stabilizing potential 122, the voltage stabilizing potential 122 is compared with the first comparing potential, if the voltage stabilizing potential 122 is smaller than the first comparison When the potential is generated, the external power supply detecting unit 21 generates a power supply abnormality signal, and determines that the external power supply abnormality state is transmitted to the motherboard 3 for the motherboard 3 to properly process the power supply abnormal signal;

d) determining the power supply performance step S43: the power supply performance detecting unit 22 receives the regulated potential 122, and also compares the regulated potential 122 with the second comparative potential, if the regulated potential 122 is smaller than the first When the potential is compared, the power supply performance detecting unit 22 generates a performance abnormality signal, and determines that the power supply performance abnormal state is transmitted to the motherboard 3 for the motherboard 3 to perform. Related response;

e) determining the power failure step S44: after the power failure detection unit 23 receives the voltage stabilization potential 122, the voltage regulation potential 122 is compared with the third comparison potential, if the voltage regulation potential 122 is smaller than the third comparison potential The power failure detecting unit 23 generates a power failure warning signal, and determines that the power failure state is transmitted to the pulse width control unit 14 for the pulse width control unit 14 to respond. The pulse width control unit 14 stops the action after the power supply failure warning signal is received by the pulse width control unit 14 . In one embodiment, the pulse width control unit 14 outputs the switching element 15 when the switching element 15 is switched. When the pulse width control unit 14 receives the power failure warning signal, the pulse width control unit 14 stops outputting the pulse signal required for the switching element 15 to switch the operation, so that the power supply 1 stops operating.

More specifically, when the external power source 10 connected to the power supply 1 cannot supply power normally due to external factors, the input power received by the power supply 1 is relatively reduced. When the potential of the external power source 10 continues to decrease such that the regulated potential 122 is less than the first comparison potential, the external power supply detecting unit 21 outputs the power supply abnormal signal for the motherboard 3 to know that the power supply 1 enters the external power supply abnormality. status. If the abnormality of the external power source 10 continues to deteriorate and the efficiency of the power supply 1 is lowered, and the regulated potential 122 is less than the second comparison potential, the power supply performance detecting unit outputs the performance abnormality information to the motherboard. 3. Informing the motherboard 3 that the power supply 1 enters the power supply performance abnormal state, the power supply 1 is unable to supply power normally, and the motherboard 3 should perform load balancing action. If the external power source 10 is abnormally severe or even fails, the regulated potential 122 is smaller than the third comparison potential, and the power failure detecting unit 23 outputs the power failure warning signal to drive the pulse width control unit 14 to stop outputting the pulse signal. The power supply 1 stops functioning.

Please refer to FIG. 7 and FIG. 8 , which are schematic diagrams showing the operation of the second and third embodiments of the method for determining the state of the power supply of the present invention. It can be seen from the foregoing that the first, second and third comparison potentials are generated by the present invention. There are two implementations. If the comparison potential generating circuit 24 is generated, the step of establishing the comparison potential step S40 includes a voltage division generating a comparison potential step S401: the comparison potential generating circuit 24 accepts the reference generated by the power supply unit 1. The potential, after being divided, generates the first, second, and third comparison potentials. On the other hand, if the first, second and third comparison potential generating circuits 25, 26, 27 are divided and generated, the step of establishing the comparison potential step S40 includes a partial voltage generating the first comparison potential step S402, one point. The voltage generating second comparison potential step S403 and a voltage division generating a third comparison potential step S404, wherein the voltage division generates a first comparison potential step S402 means that the first comparison potential generation 25 receives the reference potential, that is, performs voltage division The first comparison potential is generated, and the voltage division generates a second comparison potential step S403, which means that the first comparison potential generation 26 receives the reference potential, that is, performs voltage division to generate the second comparison potential, and the partial pressure produces a third comparison. The potential step S404 means that the third comparison potential generation 27 receives the reference potential and performs voltage division to generate the third comparison potential.

FIG. 9 is a schematic diagram showing the operation of the fourth embodiment of the method for determining the state of the power supply of the present invention. In the foregoing embodiment, the determining module 2 includes the equivalent regulated potential generating circuit 28, The invention determining method further includes a voltage division equivalent step S411 before the step of obtaining the voltage stabilizing potential step S41: the voltage stabilizing potential 122 is divided by the equivalent voltage stabilization generating circuit 28 to generate the equivalent voltage stabilizing potential. The equivalent regulated potential is compared with the first, second, and third comparison potentials to perform state determination of the power supply 1 .

In summary, the method for judging the state of the power supply device and the module thereof according to the present invention mainly utilize the voltage stabilizing potential of the voltage stabilizing energy storage element in the power factor correcting unit and the first, second, and third comparison potentials. The state of the power supply is determined, so that the motherboard can quickly know the state of the power supply for relevant load adjustment, and solves the problem that the prior embodiment is easy to generate evening reports, determine misalignment, or complicate the judgment circuit.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Variations and modifications are still within the scope of the patents of the present invention.

1. . . Power Supplier

10. . . External power source

11. . . Rectifier filter unit

12. . . Power factor correction unit

121. . . Regulated energy storage component

122. . . Regulated potential

13. . . transformer

14. . . Pulse width control unit

15. . . Switching element

16. . . Rectifier output unit

17. . . Judging module

18. . . Reference potential

2. . . Judging module

twenty one. . . External power supply detection unit

twenty two. . . Power supply performance detection unit

twenty three. . . Power failure detection unit

twenty four. . . Comparison potential generating circuit

25. . . First comparison potential generating circuit

26. . . Second comparison potential generating circuit

27. . . Third comparison potential generating circuit

28. . . Equivalent voltage stabilization potential generating circuit

3. . . motherboard

S40, S401, S402, S403, S404, S41, S411, S42, S43, S44. . . step

FIG. 1 is a schematic diagram of the implementation of a conventional power supply state determination.

2 is a circuit block diagram (1) of a first embodiment of a determination module for a power supply state of the present invention.

3 is a circuit block diagram (2) of a first embodiment of a determination module for a power supply state of the present invention.

4 is a circuit block diagram of a second embodiment of a determination module for a power supply state of the present invention.

FIG. 5 is a circuit block diagram of a third embodiment of a determination module for a power supply state of the present invention.

FIG. 6 is a schematic diagram showing the operation of the first embodiment of the method for determining the state of the power supply of the present invention.

FIG. 7 is a schematic diagram showing the operation of the second embodiment of the method for determining the state of the power supply of the present invention.

FIG. 8 is a schematic diagram showing the operation of the third embodiment of the method for determining the state of the power supply of the present invention.

FIG. 9 is a schematic diagram showing the operation of the fourth embodiment of the method for determining the state of the power supply of the present invention.

S40, S41, S42, S43, S44. . . step

Claims (18)

A method for judging a state of a power supply is applied to a power supply, the power supply includes a voltage stabilizing energy storage component having a voltage stabilizing potential after being energized in a power correcting unit, and a driving power supply The power supply is connected to the power supply of the pulse width control unit, and the power supply is electrically connected to a motherboard. The determining method includes the following steps:
a step of establishing a comparison potential: establishing a first comparison potential, a second comparison potential smaller than the first comparison potential, and a third comparison potential smaller than the second comparison potential;
Step of obtaining a voltage stabilizing potential: obtaining a voltage stabilizing potential of the voltage stabilizing energy storage component during the operation of the power supply;
An external power supply step: comparing the regulated potential to the first comparison potential, if less than the first comparison potential, determining an external power supply abnormal state, and generating a power supply abnormal signal to the motherboard;
a step of determining the power supply performance: comparing the voltage stabilizing potential with the second comparison potential, if less than the second comparison potential is determined to be a power supply performance abnormal state, and generating a performance abnormality signal is transmitted to the motherboard; and determining The power supply failure step: comparing the voltage stabilization potential with the third comparison potential, and if it is less than the third comparison potential, determining that the power supply failure state is generated, and generating a power failure warning signal is transmitted to the pulse width control unit. The method for judging the state of the power supply device according to the first aspect of the invention, wherein the step of establishing the comparison potential step is performed before the step of generating a partial voltage to generate a comparison potential: receiving a reference potential and generating a voltage by a comparison potential generating circuit The first, second, and third comparison potentials. The method for determining a power supply state according to the first aspect of the invention, wherein the step of establishing a comparison potential further comprises a step of generating a first comparison potential by receiving a reference voltage: receiving a reference potential via a first comparison potential generation circuit The voltage produces the first comparison potential. The method for determining a power supply state according to the first aspect of the invention, wherein the step of establishing a comparison potential further comprises a step of generating a second comparison potential by receiving a reference potential: receiving a reference potential via a second comparison potential generation circuit The voltage produces the second comparison potential. The method for determining a power supply state according to the first aspect of the invention, wherein the step of establishing a comparison potential further comprises a step of generating a third comparison potential by receiving a reference voltage: receiving a reference potential via a third comparison potential generation circuit The voltage produces the third comparison potential. The method for judging the state of the power supply device according to the first aspect of the invention, wherein the step of obtaining the voltage stabilizing potential further comprises a step of dividing the voltage: receiving the voltage stabilizing voltage to generate a voltage divider by an equivalent voltage regulator An equivalent regulated potential is generated. A power supply state determination module is used in a power supply, the power supply includes a voltage stabilizing energy storage component disposed in a power correction unit and having a regulated potential, and a driving The power supply is configured to perform a power conversion of the pulse width control unit, and the power supply is electrically connected to a motherboard. The determining module includes:
An external power supply detecting unit has a first comparison potential electrically connected to the voltage stabilizing energy storage component and the motherboard, and the voltage stabilizing potential of the voltage stabilizing energy storage component is compared with the first comparison potential to generate a potential An external power supply abnormal signal is transmitted to the motherboard;
a power supply performance detecting unit having a second comparison potential electrically connected to the voltage stabilizing energy storage component and the motherboard, and receiving a potential difference between the voltage stabilizing potential of the voltage stabilizing energy storage component and the second comparison potential, Generating a power supply abnormality signal to the motherboard; and a power failure detecting unit having a third comparison potential electrically connected to the voltage stabilizing energy storage component and the pulse width control unit to receive the voltage storage energy storage component The voltage stabilizing potential is compared with the third comparing potential to generate a power failure warning signal to be transmitted to the pulse width control unit. The judging module of the power supply state described in claim 7 , wherein the judging module comprises an electrical connection detecting module, the power supply performance detecting unit, and the power failure detecting unit A comparison potential generating circuit that generates the first, second, and third comparison potentials is received from the power supply. The judging module of the power supply state according to claim 7 , wherein the judging module comprises an electrical connection detecting unit and receiving a reference potential from the power supply to generate the A first comparison potential generating circuit of the first comparison potential. The judging module of the power supply state according to claim 7 , wherein the judging module comprises an electrical connection to the power supply performance detecting unit and receives a reference potential from the power supply after being divided. A second comparison potential generating circuit that generates the second comparison potential. The judging module of the power supply state as described in claim 7 , wherein the judging module comprises an electrical connection failure detecting unit and receiving a reference potential from the power supply to generate the A third comparison potential generating circuit of the third comparison potential. The judging module of the power supply state as described in claim 7 , wherein the judging module comprises an electrically connected voltage stabilizing energy storage component to receive the stabilizing potential and is divided and converted into an equivalent stabilizing potential And outputting to the external power supply detecting unit, the power supply performance detecting unit, and the equivalent steady voltage potential generating circuit of the power fail detecting unit. The judging module of the power supply state described in claim 7 , wherein the external power supply detecting unit is a logic circuit. The judging module of the power supply state described in claim 7 , wherein the external power supply detecting unit is a comparator. The judging module of the power supply state described in claim 7 , wherein the power supply performance detecting unit is a logic circuit. The judging module of the power supply state described in claim 7 , wherein the power supply performance detecting unit is a comparator. The judging module of the power supply state described in claim 7 , wherein the power failure detecting unit is a logic circuit. The judging module of the power supply state described in claim 7 is wherein the power failure detecting unit is a comparator.