Control method of power supply equipment and power supply equipment

Abstract

The invention discloses a control method of power supply equipment and the power supply equipment. The power supply equipment monitors a pin state of a first pin of the power supply equipment; under the condition that the pin state of the first pin represents that the first pin is not connected with the load equipment, a first circuit of the power supply equipment is controlled to be disconnected, so that the power supply equipment has first output voltage; under the condition that the pin state of the first pin represents that the first pin is connected with the load equipment, a first circuit of the power supply equipment is controlled to be switched on, so that the power supply equipment has second output voltage; wherein the internal power consumption of the power supply equipment under the first output voltage is smaller than the internal power consumption of the power supply equipment under the second output voltage.

Description

Technical Field

[0001] The present application relates to a control method for a power supply device and a power supply device. Background Art

[0002] Currently, when reducing the internal power consumption of a related power supply device in an idle state, it is generally achieved by replacing parts; however, such methods not only have a high cost but also have a poor effect in reducing power consumption; thus, how to effectively reduce the internal power consumption of a power supply device in an idle state is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0003] An embodiment of the present application provides a control method for a power supply device and a power supply device.

[0004] The technical solution of the embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a control method for a power supply device, the method including:

[0006] Monitoring the pin state of a first pin of the power supply device;

[0007] When the pin state of the first pin indicates that no load device is connected, controlling a first circuit of the power supply device to disconnect so that the power supply device has a first output voltage;

[0008] When the pin state of the first pin indicates that a load device is connected, controlling the first circuit of the power supply device to conduct so that the power supply device has a second output voltage;

[0009] Wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

[0010] In a second aspect, an embodiment of the present application provides a power supply device, including:

[0011] A first pin for indicating whether the power supply device is connected to a load device through the pin state;

[0012] A first circuit for disconnecting when the pin state of the first pin indicates that no load device is connected so that the power supply device has a first output voltage; and for conducting when the pin state of the first pin indicates that a load device is connected so that the power supply device has a second output voltage;

[0013] Wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

[0014] In an embodiment of the present application, a control method for a power supply device and a power supply device are provided. The power supply device can monitor the pin status of a first pin; when the pin status of the first pin indicates that no load device is connected, the first circuit of the power supply device is controlled to be disconnected so that the power supply device has a first output voltage; when the pin status of the first pin indicates that a load device is connected, the first circuit of the power supply device is controlled to be turned on so that the power supply device has a second output voltage; wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage. Thus, it can be seen that the power supply device can determine whether a load device is currently connected, that is, whether it is in an unloaded state, by the pin status of the first pin provided inside it; when no load device is connected, that is, when the power supply device is in an unloaded state, the power supply device can control the first circuit to be disconnected to obtain the first output voltage in the unloaded state, while when a load device is connected, that is, when the power supply device is in a loaded state, the first circuit is controlled to be turned on to obtain the second output voltage, which can make the internal power consumption of the power supply device at the first output voltage less than that at the second output voltage, thereby effectively reducing the internal power consumption of the power supply device in the unloaded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application.

[0016] Figure 1 Schematic diagram of the implementation process of the control method for the power supply device proposed in the embodiment of the present application;

[0017] Figure 2 Schematic diagram of the adapter proposed in the embodiment of the present application Figure 1 ;

[0018] Figure 3 Schematic diagram of the adapter proposed in the embodiment of the present application Figure 2 ;

[0019] Figure 4 Schematic diagram of the circuit structure of the power supply device proposed in the embodiment of the present application Figure 1 ;

[0020] Figure 5 Schematic diagram of the circuit structure of the power supply device proposed in the embodiment of the present application Figure 2 ;

[0021] Figure 6 Schematic diagram of the circuit structure of the power supply device proposed in the embodiment of the present application Figure 3 ;

[0022] Figure 7Schematic diagram of the composition structure of the power supply device proposed in the embodiment of the present application;

[0023] Figure 8 Schematic diagram of the circuit structure of the power supply device proposed in the embodiment of the present application Figure 4 。 Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the related application, rather than limiting the application. In addition, it should be noted that, for the sake of description, only the parts related to the relevant application are shown in the drawings.

[0025] Currently, various energy efficiency standards or related regulations have increasingly strict requirements for the energy consumption of power supply devices in the no-load state. For example, there are regulations requiring that the power of an adapter in the no-load state does not exceed 0.15W; even in the first-level energy efficiency requirements for single-output adapters, it is indicated that in the no-load state, the power of the adapter pins does not exceed 0.075W, as shown in the following table:

[0026] Table 1

[0027]

[0028]

[0029] The existing related methods are to select some parts with higher costs to reduce the part losses, thereby reducing the internal power consumption of the related power supply devices in the no-load state. However, the effect of reducing power consumption by these methods is not ideal. For example, it can only make the first-level energy consumption of the adapter reach about 0.09W, and it cannot meet the energy efficiency requirement that the power does not exceed 0.075W.

[0030] In order to solve the problems existing in the current related power supply devices in reducing the internal power consumption in the no-load state, the embodiment of the present application provides a control method and a power supply device for a power supply device. The power supply device can monitor the pin state of the first pin; when the pin state of the first pin indicates that no load device is connected, control the first circuit of the power supply device to be disconnected so that the power supply device has a first output voltage; when the pin state of the first pin indicates that a load device is connected, control the first circuit of the power supply device to be turned on so that the power supply device has a second output voltage; wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage, thereby effectively reducing the internal power consumption of the power supply device in the no-load state.

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0032] An embodiment of the present application provides a control method for a power supply device. Figure 1 As shown in the schematic flow chart of the implementation of the control method for the power supply device proposed in the embodiment of the present application, Figure 1 the control method for the power supply device may include the following steps:

[0033] Step 101: Monitor the pin status of the first pin of the power supply device.

[0034] In the embodiment of the present application, the power supply device can monitor the pin status of the first pin.

[0035] In the embodiment of the present application, the power supply device can be any power electronic device that can convert input electrical energy into a specific form, such as voltage, current, frequency, etc. for output to meet the load requirements; for example, the power supply device can be an adapter.

[0036] In the embodiment of the present application, the first pin can be any pin in the power supply device that can output a signal, and the present application does not make specific limitations.

[0037] In some embodiments of the present application, the signal may include at least one of a voltage signal, a clock signal, a data signal, a control signal, and a feedback signal; correspondingly, the pin status of the first pin may include the presence or absence of the above signals.

[0038] Exemplarily, the power supply device is an adapter. As Figure 2 and Figure 3 shown, the output terminals of the adapter may include a positive electrode and a negative electrode. The first pin may be an identification pin (ID Pin) in the output terminals of the adapter, and this pin can output a voltage signal.

[0039] Exemplarily, the power supply device is an adapter, and the first pin is the identification pin of the adapter. This pin can output a voltage signal. Thus, when the identification pin outputs a voltage signal, that is, the pin status of the identification pin is the presence of a signal, and when the identification pin does not output a voltage signal, it means that the pin status of the identification pin is the absence of a signal.

[0040] In some embodiments of the present application, the power supply device can determine that a load device is connected when the pin status of the first pin is the presence of a signal; and determine that no load device is connected when the pin status of the first pin is the absence of a signal.

[0041] In an embodiment of the present application, connecting a load device indicates that the power supply device is in an operating state, and not connecting a load device indicates that the power supply device is in a non-operating state.

[0042] Exemplarily, the power supply device is an adapter, and the first pin is the identity identification pin in the adapter. When there is a voltage signal output from the identity identification pin, it indicates that the adapter is connected to the load device. At this time, the adapter is in a loaded state, and when there is no voltage signal output from the identity identification pin, it indicates that the adapter is not connected to the load device, that is, it is in an unloaded state.

[0043] Step 102, when the pin state of the first pin indicates that the load device is not connected, control the first circuit of the power supply device to disconnect, so that the power supply device has a first output voltage.

[0044] In an embodiment of the present application, after the power supply device monitors the pin state of the first pin, when the pin state of the first pin indicates that the load device is not connected, control the first circuit of the power supply device to disconnect, so that the power supply device has a first output voltage.

[0045] In an embodiment of the present application, the first circuit can be a circuit that enables the power supply device to have different output voltages.

[0046] In an embodiment of the present application, the first circuit can be connected to the first pin, so that the first circuit can trigger different operations in response to the pin state of the first pin.

[0047] In some embodiments of the present application, the first circuit can include a switch, and the opening and closing of the switch correspond to the opening and closing of the first circuit.

[0048] In some embodiments of the present application, the power supply device can further include a feedback circuit. The power supply device can control the feedback circuit to output a first feedback voltage in response to the disconnection of the first circuit, and determine the first internal power consumption of the power supply device based on the first feedback voltage.

[0049] In an embodiment of the present application, the first feedback voltage represents the feedback voltage of the feedback circuit of the power supply device in the unloaded state; the first feedback voltage can be used to stabilize the output voltage of the power supply device in the unloaded state.

[0050] In some embodiments of the present application, the power supply device can further include a second circuit, and the second circuit can include multiple resistors; the first circuit can be connected in parallel with the second circuit. The form of the parallel connection of the first circuit and the second circuit is not limited in the present application. For example, the first circuit can be connected in parallel beside any one resistor in the second circuit, or can be connected in parallel beside multiple resistors in the second circuit. Thus, with the on-off of the first circuit, different short-circuit situations can occur in the resistors in the second circuit, so that the power supply device has different output voltages.

[0051] It can be understood that in the embodiments of the present application, as the switch in the first circuit is turned off, the corresponding resistance circuit in the second circuit connected in parallel with the first circuit is turned on.

[0052] In some embodiments of the present application, the power supply device may determine a first output voltage based on a plurality of resistors in the second circuit connected in parallel with the first circuit in response to the switch in the first circuit being turned off.

[0053] Exemplarily, there are 3 resistors in the second circuit, and the first circuit is connected in parallel beside 1 resistor in the second circuit; when the pin state of the first pin is no signal, the switch in the first circuit is turned off, and the partial circuit where this 1 resistor connected in parallel with the first circuit is located will be turned on, then the output voltage of the power supply device at this time, that is, the first output voltage, is determined based on these 3 resistors.

[0054] In some embodiments of the present application, the power supply device may determine a first feedback voltage according to a plurality of resistors in the second circuit; wherein, the first feedback voltage is inversely proportional to the resistance values of the plurality of resistors in the second circuit.

[0055] Exemplarily, as Figure 4 shown, the second circuit includes three resistors R3, R4, and R5, the first circuit is connected in parallel beside R5, and the feedback circuit is arranged between R3 and R4 in the second circuit. Thus, when the power supply device is not connected to the load device, that is, when the pin state of the first pin is no signal, the switch Q1 in the first circuit is turned off, and the feedback voltage can be determined by the following formula:

[0056]

[0057] wherein, Vo_FB1 is the first feedback voltage of the power supply device in the no-load state, and PSU_Vo represents the output voltage of the power supply device.

[0058] It can be understood that in the embodiments of the present application, since the first circuit will not be triggered to conduct when the power supply device is not connected to the load device, therefore, the first output voltage of the power supply device in the no-load state is determined based on all the resistors in the second circuit.

[0059] In some embodiments of the present application, the first internal power consumption of the power supply device in the no-load state may be determined according to the first output voltage. For example, the first internal power consumption may be determined according to the first output voltage and the output current in the no-load state; correspondingly, after determining the first output voltage according to the first feedback voltage, the first internal power consumption may also be determined according to the first output voltage and the output current in the no-load state.

[0060] In some embodiments of the present application, when the power supply device determines the first internal power consumption of the power supply device based on the first feedback voltage, if the error voltage between the first feedback voltage and the reference voltage does not meet the preset error voltage condition, the first feedback voltage can be adjusted based on an amplifier and a first amplification gain to obtain an adjusted feedback voltage; then, the first output voltage is determined according to the adjusted feedback voltage, and the first internal power consumption is determined according to the first output voltage; wherein, the error voltage between the adjusted feedback voltage and the reference voltage meets the preset error voltage condition.

[0061] In some embodiments of the present application, the preset error voltage condition represents a condition where the error voltage is close to 0.

[0062] In an embodiment of the present application, the error voltage reflects the deviation degree between the current output voltage and the desired output voltage.

[0063] In some embodiments of the present application, the error voltage between the first feedback voltage and the reference voltage not meeting the preset error voltage condition includes two cases: the error voltage between them is greater than 0, that is, the first feedback voltage is greater than the reference voltage, and the error voltage between them is less than 0, that is, the first feedback voltage is less than the reference voltage.

[0064] In some embodiments of the present application, the specific value of the first amplification gain is not limited in the present application. When the error voltage between the first feedback voltage and the reference voltage is greater than 0, the value of the first amplification gain can be less than the value of the first amplification gain when the error voltage between the first feedback voltage and the reference voltage is less than 0.

[0065] It can be understood that in an embodiment of the present application, the error voltage between the adjusted feedback voltage and the reference voltage meeting the preset error voltage condition means that the adjusted feedback voltage is close to the reference voltage and can be regarded as the adjusted feedback voltage being equal to the reference voltage.

[0066] Exemplarily, the amplifier in the feedback circuit of the power supply device can compare the first feedback voltage with the reference voltage to obtain the error voltage between the two. If the error voltage is greater than 0, the error voltage can be amplified using the first amplification gain to obtain a voltage that is in antiphase with the first feedback voltage and has an appropriate amplitude. After being superimposed on the first feedback voltage, the first feedback voltage is reduced, so that the adjusted feedback voltage is close to the reference voltage.

[0067] Exemplarily, the amplifier of the feedback circuit may compare the first feedback voltage with a reference voltage to obtain an error voltage therebetween. If the error voltage is less than 0, the error voltage may be amplified using a first amplification gain to obtain a voltage in phase with the first feedback voltage and having an appropriate amplitude. After being superimposed on the first feedback voltage, the first feedback voltage is increased, so that the adjusted feedback voltage approaches the reference voltage.

[0068] In some embodiments of the present application, the first output voltage may be determined based on the first feedback voltage.

[0069] In some embodiments of the present application, since the first feedback voltage is equal to the reference voltage when the power supply device outputs stably, when determining the first output voltage in the case of stable output, the first output voltage may be directly determined using the reference voltage.

[0070] Exemplarily, as described above Figure 4 For the circuit structure of the power supply device shown, when the power supply device is not connected to a load device and the power supply device outputs stably, the first feedback voltage is equal to the reference voltage, Vo_FB = Vref. Then the first output voltage may be determined by the following formula:

[0071]

[0072] Wherein, ADP_Vo1 represents the first output voltage, and Vref represents the reference voltage.

[0073] Step 103: When the pin state of the first pin indicates that a load device is connected, control the first circuit of the power supply device to conduct, so that the power supply device has a second output voltage; wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

[0074] In an embodiment of the present application, after monitoring the pin state of the first pin of the power supply device, when the pin state of the first pin indicates that a load device is connected, the first circuit of the power supply device may be controlled to conduct, so that the power supply device has a second output voltage; wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

[0075] In some embodiments of the present application, the second output voltage is greater than the first output voltage.

[0076] In an embodiment of the present application, the internal power consumption at the first output voltage represents the efficiency loss of internal components of the power supply device when the power supply device is not connected to a load device.

[0077] In an embodiment of the present application, the internal power consumption at the second output voltage characterizes the efficiency loss of internal components of the power supply device when connected to a load device.

[0078] In some embodiments of the present application, the internal power consumption at the first output voltage may also be less than the on-load power consumption of the power supply device at the second output voltage; wherein, the on-load power consumption characterizes the overall output power consumption of the power supply device when connected to a load device.

[0079] It should be noted that, in an embodiment of the present application, the power supply device will enter the burst mode in the no-load state, and a cluster of Pulse Width Modulation (PWM) drive pulses will be sent at intervals; therefore, the main power consumption of the power supply device in the no-load state comes from the switching loss caused by executing the burst mode. The switching loss is proportional to the switching frequency of the circuit. The lower the switching frequency, the smaller the switching loss; therefore, the power consumption in the no-load state can be reduced by reducing the frequency of the burst mode, such as sending a cluster of pulses at longer intervals. The method of reducing the frequency of the burst mode is to reduce the output voltage. For example, when the output voltage of the power supply device is reduced from 20V to a lower voltage, the power supply device will enter a deeper burst mode, which can further reduce the switching frequency and effectively reduce the internal power consumption of the power supply device in the no-load state.

[0080] In some embodiments of the present application, the power supply device may, in response to the closing of a switch in the first circuit, determine the second output voltage based on at least one first resistor in the second circuit.

[0081] In an embodiment of the present application, the first resistor characterizes the resistor in the second circuit that is not short-circuited.

[0082] It can be understood that, in an embodiment of the present application, the resistor in the second circuit that is paralleled by the first circuit will be short-circuited when the first circuit is turned on, so that the power supply device will have different output voltages when the first circuit is turned on or off, respectively.

[0083] In some embodiments of the present application, the power supply device may, in response to the conduction of the first circuit, control the feedback circuit to output a second feedback voltage, and determine the second internal power consumption of the power supply device based on the second feedback voltage; the first internal power consumption is less than the second internal power consumption.

[0084] In some embodiments of the present application, the power supply device may also determine the second output voltage based on the second feedback voltage, and then determine the on-load power consumption based on the second output voltage.

[0085] It can be understood that in the embodiments of the present application, when the power supply device outputs stably, the second feedback is equal to the reference voltage. Therefore, when determining the second output voltage under stable output conditions, the reference voltage can be directly used to determine the second output voltage.

[0086] Exemplarily, based on the foregoing Figure 4 shown circuit structure, when the power supply device is connected to the load device, thereby triggering the first circuit to conduct, the second output voltage can be determined by the following formula:

[0087]

[0088] It can be seen that since the first circuit conducts, the resistor R5 is short-circuited. Since the voltage-dividing resistor becomes smaller, the second output voltage is greater than the first output voltage; thus, the first internal power consumption corresponding to the first output voltage is less than the second internal power consumption and the load power consumption corresponding to the second output voltage, thereby effectively reducing the internal power consumption of the power supply device in the no-load state.

[0089] In some embodiments of the present application, the power supply device can determine the second feedback voltage according to at least one first resistor; wherein, the second feedback voltage is inversely proportional to the resistance value of at least one first resistor.

[0090] Exemplarily, based on the foregoing Figure 4 shown circuit structure, when the switch Q1 in the first circuit is closed, R5 will be short-circuited, so that the first resistors that are not short-circuited in the second circuit include R3 and R4. Then, the second feedback voltage can be determined according to R3 and R4, and the determination method of the second feedback voltage can be expressed by the following formula:

[0091]

[0092] wherein, Vo_FB2 represents the second feedback voltage.

[0093] In some embodiments of the present application, the power supply device can adjust the feedback voltage based on the second feedback voltage to determine the second internal power consumption of the power supply device; the power supply device can adjust the second feedback voltage based on the amplifier and the second amplification gain when the error voltage between the second feedback voltage and the reference voltage does not meet the preset error voltage condition to obtain the third feedback voltage; then determine the second output voltage according to the third feedback voltage, and determine the second internal power consumption according to the second output voltage; wherein, the error voltage between the third feedback voltage and the reference voltage meets the preset error voltage condition.

[0094] It can be understood that in the embodiments of the present application, the error voltage between the second feedback voltage and the reference voltage does not meet the preset error voltage condition, including two cases where the error voltage between the two is greater than 0, that is, the second feedback voltage is greater than the reference voltage, and the error voltage between the two is less than 0, that is, the second feedback voltage is less than the reference voltage.

[0095] In the embodiments of the present application, the specific value of the second amplification gain is not limited in the present application. When the error voltage between the second feedback voltage and the reference voltage is greater than 0, the value of the second amplification gain can be less than the value of the second amplification gain when the error voltage between the second feedback voltage and the reference voltage is less than 0.

[0096] Exemplarily, the amplifier in the feedback circuit of the power supply device can compare the second feedback voltage with the reference voltage to obtain the error voltage between the two. If the error voltage is greater than 0, the error voltage can be amplified by using the second amplification gain to obtain a voltage that is in antiphase with the second feedback voltage and has an appropriate amplitude. After being superimposed on the second feedback voltage, the second feedback voltage is reduced, so that the third feedback voltage approaches the reference voltage.

[0097] Exemplarily, the amplifier in the feedback circuit can compare the second feedback voltage with the reference voltage to obtain the error voltage between the two. If the error voltage is less than 0, the error voltage can be amplified by using the second amplification gain to obtain a voltage that is in phase with the second feedback voltage and has an appropriate amplitude. After being superimposed on the second feedback voltage, the second feedback voltage is increased, so that the third feedback voltage approaches the reference voltage.

[0098] In some embodiments of the present application, the power supply device can control the switch in the first circuit to close according to the target gear, so as to determine the second output voltage based on the first resistor corresponding to the target gear in the second circuit.

[0099] In the embodiments of the present application, there can be at least one first resistor corresponding to the target gear.

[0100] In the embodiments of the present application, the first circuit can be connected in parallel beside at least one resistor in the second circuit. Correspondingly, the switch in the first circuit can be a switch that can produce different gear closing effects. Different gears can be used to control different resistors in the second circuit to be short-circuited. Thus, in the actual application scenario, the switch can be thrown to different target gears based on different power consumption requirements to obtain the corresponding second output voltage.

[0101] It should be noted that no matter which target gear the switch in the first circuit closes according to, it will cause the resistors in the second circuit to be short-circuited accordingly. And the first output voltage is determined based on all the resistors in the second circuit when the first circuit is disconnected. Therefore, the first output voltage must be less than the second output voltage.

[0102] Exemplarily, as Figure 5 shown, the first circuit can be connected in parallel beside three resistors in the second circuit. The first circuit includes three switches, and each parallel circuit can correspond to one switch. Assume that at a certain moment, the power supply device responds to the pin state of the first pin being characterized as connecting to the load device, and triggers the switch Q2 (target gear) corresponding to the second parallel circuit in the first circuit to close. Then, the resistor R4 corresponding to the second parallel circuit in the second circuit is short-circuited, and the second output voltage can be determined based on R3 and R5 (the first resistors corresponding to the target gear) that are not short-circuited.

[0103] Exemplarily, as Figure 6 shown, the first circuit can be connected in parallel beside two resistors (R4 and R5) in the second circuit. The first circuit includes two switches, and each parallel circuit can correspond to one switch. Assume that at a certain moment, the power supply device responds to the pin state of the first pin being characterized as connecting to the load device, and triggers the switches Q1 and Q2 (target gear) corresponding to the two parallel circuits in the first circuit to close. Then, the resistors R5 and R4 corresponding to the two parallel circuits in the second circuit are short-circuited, and the second output voltage can be determined based on R3 and R2 (the first resistors corresponding to the target gear) that are not short-circuited.

[0104] An embodiment of the present application provides a control method for a power supply device. The power supply device can monitor the pin state of the first pin. When the pin state of the first pin is characterized as not connecting to the load device, the first circuit of the power supply device is controlled to be disconnected, so that the power supply device has a first output voltage. When the pin state of the first pin is characterized as connecting to the load device, the first circuit of the power supply device is controlled to be conducted, so that the power supply device has a second output voltage. Among them, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage. Thus, it can be seen that the power supply device can determine whether a load device is currently connected, that is, whether it is in an unloaded state, by setting the pin state of the first pin inside it. When no load device is connected, that is, when the power supply device is in an unloaded state, the power supply device can control the first circuit to be disconnected to obtain the first output voltage in the unloaded state. When a load device is connected, that is, when the power supply device is in a loaded state, the first circuit is controlled to be conducted to obtain the second output voltage, which can make the internal power consumption of the power supply device at the first output voltage less than the internal power consumption at the second output voltage, thereby effectively reducing the internal power consumption of the power supply device in the unloaded state.

[0105] The description of the power supply device in the embodiments of the present application is similar to that of the embodiments of the control method of the power supply device, and has beneficial effects similar to those of the embodiments of the control method of the power supply device. Therefore, it will not be elaborated here. For the technical details not disclosed in the embodiments of the present power supply device, please refer to the description of the embodiments of the control method of the power supply device in the present application for understanding.

[0106] Based on the above embodiments, another embodiment of the present application provides a power supply device, as Figure 7 shown, the power supply device 0 may include a first pin 1 and a first circuit 2; wherein, the first pin may be connected to the first circuit.

[0107] The first pin is used to indicate whether the power supply device is connected to a load device through the pin state.

[0108] In some embodiments of the present application, when the pin state of the first pin is a signal present, it indicates that the load device is connected; when the pin state of the first pin is a signal absent, it indicates that the load device is not connected.

[0109] In some embodiments of the present application, the signal may include at least one of a voltage signal, a clock signal, a data signal, a control signal, and a feedback signal.

[0110] The first circuit is used to disconnect when the pin state of the first pin indicates that the load device is not connected, so that the power supply device has a first output voltage; and to conduct when the pin state of the first pin indicates that the load device is connected, so that the power supply device has a second output voltage.

[0111] Wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

[0112] In some embodiments of the present application, the first circuit may include a switch; the switch is used to disconnect when the pin state of the first pin indicates that the load device is not connected, so as to disconnect the first circuit; and to close when the pin state of the first pin indicates that the load device is connected, so as to conduct the first circuit.

[0113] In some embodiments of the present application, as Figure 7 shown, the power supply device 0 may further include a second circuit 3.

[0114] In the embodiments of the present application, the second circuit is in parallel with the first circuit, and the second circuit includes a plurality of resistors.

[0115] In some embodiments of the present application, the second circuit is used to obtain the first output voltage based on the plurality of resistors when the first circuit is disconnected; and to obtain the second output voltage based on at least one first resistor that is not short-circuited when the first circuit is conducting.

[0116] In some embodiments of the present application, as Figure 7 shown, the power supply device 0 may further include a feedback circuit 4.

[0117] In some embodiments of the present application, the feedback circuit 4 can be used to output a first feedback voltage in response to the disconnection of the first circuit, so that the power supply device has a first internal power consumption corresponding to the first feedback voltage.

[0118] In some embodiments of the present application, the first feedback voltage can be inversely proportional to the resistance values of a plurality of resistors in the second circuit.

[0119] In some embodiments of the present application, the feedback circuit may include an amplifier; the feedback circuit can also be used to adjust the first feedback voltage based on the amplifier and a first amplification gain when the error voltage between the first feedback voltage and the reference voltage does not meet the preset error voltage condition, to obtain an adjusted feedback voltage, so that the power supply device obtains a first output voltage and a first internal power consumption corresponding to the first output voltage based on the adjusted feedback voltage.

[0120] It can be understood that in the embodiments of the present application, the error voltage between the adjusted feedback voltage and the reference voltage meets the preset error voltage condition.

[0121] In some embodiments of the present application, the feedback circuit 4 can also be used to output a second feedback voltage in response to the conduction of the first circuit, so that the power supply device has a second internal power consumption corresponding to the second feedback voltage.

[0122] In some embodiments of the present application, the second feedback voltage can be inversely proportional to the resistance value of at least one first resistor.

[0123] In some embodiments of the present application, the feedback circuit can also be used to adjust the second feedback voltage based on the amplifier and the first amplification gain when the error voltage between the second feedback voltage and the reference voltage does not meet the preset error voltage condition, to obtain a third feedback voltage, so that the power supply device obtains a second output voltage and a corresponding second internal power consumption based on the third feedback voltage; wherein, the error voltage between the third feedback voltage and the reference voltage meets the preset error voltage condition.

[0124] In some embodiments of the present application, the switch in the first circuit may also have different gear functions.

[0125] In some embodiments of the present application, the second circuit can also be used to obtain a second output voltage according to a first resistor corresponding to the target gear in response to the switch in the first circuit being closed according to the target gear.

[0126] An embodiment of the present application provides a power supply device, including a first pin for indicating whether the power supply device is connected to a load device through the pin state; a first circuit for disconnecting when the pin state of the first pin indicates that the load device is not connected, so that the power supply device has a first output voltage; and conducting when the pin state of the first pin indicates that the load device is connected, so that the power supply device has a second output voltage; wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage. Thus, it can be seen that the power supply device can determine whether a load device is currently connected, that is, whether it is in an unloaded state, by setting the pin state of the first pin provided inside it; when the load device is not connected, that is, when the power supply device is in an unloaded state, the power supply device can control the first circuit to disconnect to obtain the first output voltage in the unloaded state, and when the load device is connected, that is, when the power supply device is in a loaded state, it is to control the first circuit to conduct to obtain the second output voltage, which can make the internal power consumption of the power supply device at the first output voltage less than that at the second output voltage, thereby effectively reducing the internal power consumption of the power supply device in the unloaded state.

[0127] Based on the above embodiment, in another embodiment of the present application, exemplarily, the power supply device is an adapter of a computer, such as Figure 8 shown, the circuit structure of the adapter can at least include an ID Pin, the ID Pin can be connected to the first circuit, and the first circuit can be connected in parallel beside the R5 resistor in the second circuit. Thus, when a load is connected to the power supply device, the switch Q1 in the first circuit will be triggered to close in response to the presence signal of the ID Pin, so that R5 is short-circuited, and the voltage-dividing resistors are only R3 and R4; when the power supply device has no load connected, that is, in the unloaded state, the switch Q1 in the first circuit will be triggered to open in response to the absence signal of the ID Pin, so that the first circuit is disconnected, and the voltage-dividing resistors are R3, R4, and R5; thus, it can be seen that the voltage-dividing resistors of the power supply device in the unloaded state are greater than those in the loaded state, making the first output voltage in the unloaded state less than the second output voltage in the loaded state, thereby making the power consumption in the unloaded state less than that in the loaded state, and effectively reducing the internal power consumption in the unloaded state.

[0128] Exemplarily, such as Figure 8As shown, the branch where the ID Pin is located can have a pull - down resistor R1. This resistor can be used to transmit the identity or specification information of the adapter, so that the load device connected to the adapter can identify the type of the adapter and adjust the charging / power - supply strategy. The resistance value of the resistor R1 is not limited in this application. As shown in Table 2 below, different resistance values of R1 can be selected based on the power of the output terminals (positive and negative) of the adapter. Different resistance values of R1 can make the voltage of the ID Pin different, so that the device connected to the adapter can identify how much power the adapter is by detecting the voltage of the ID Pin. In addition, the load device connected to the adapter can have a pull - up resistor R2, and the pull - up resistor R2 can be connected to the positive - power supply terminal (Vcc).

[0129] Table 2

[0130] Power of the output terminal Resistance value of R1 (Ω) 45W 118 65W 287 90W 549 120W 750 150W 1400 170W 1910 135W 1000 230W 4640

[0131] Exemplarily, as Figure 8 shown, for the adapter shown, in the loaded state, for example, when the adapter is connected to a computer, the output voltage of the adapter can be 20V. When the adapter is disconnected from the computer, that is, in the no - load state, the internal power consumption in the no - load state can be reduced by reducing the output voltage of the adapter. This is because the power supply device will enter the burst mode in the no - load state and send a cluster of pulse - width - modulated drive pulses at intervals. Therefore, the main power consumption of the power supply device in the no - load state comes from the switching loss caused by executing the burst mode. The switching loss is proportional to the switching frequency of the circuit. The lower the switching frequency, the smaller the switching loss. Therefore, the power consumption in the no - load state can be reduced by reducing the frequency of the burst mode, such as sending a cluster of pulses at longer intervals. The method of reducing the frequency of the burst mode is to reduce the output voltage. For example, when the output voltage of the power supply device is reduced from 20V to a lower voltage, the power supply device will enter a deeper burst mode, so that the switching frequency can be further reduced, effectively reducing the internal power consumption in the no - load state.

[0132] In some embodiments of this application, as Figure 8 shown, the adapter only needs to utilize the existing ID Pin and monitor whether there is a voltage signal output to determine whether it is currently in the no - load state. When it is detected that the voltage of the ID Pin is not 0, it means that there is a load device connected currently. At this time, the adapter maintains a 20V voltage output to ensure the normal operation of the load device. When it is detected that the voltage of the ID Pin is 0, it means that the ID Pin is not connected to the Vcc and R2 on the load - device side, that is, the adapter is in the no - load state. At this time, by lowering the output voltage of the adapter, the power consumption in the no - load state can be reduced.

[0133] Exemplarily, as Figure 8As shown, when the switch Q1 is open, R3, R4, and R5 all act as voltage-dividing resistors, and the feedback voltage of the feedback circuit can be determined by the aforementioned formula (1); the reference voltage is a fixed value, usually 2.5V. The feedback circuit can adjust the feedback voltage based on the reference voltage to ensure the stability of the adapter output. When the adapter output is stable, the feedback voltage is equal to the reference voltage. At this time, the output voltage of the adapter can be determined by the aforementioned formula (2); by connecting the switch Q1 in parallel with the voltage-dividing resistor R5, the voltage signal of the ID Pin can be used to trigger the closing and opening of the switch Q1; when the voltage of the ID Pin is 0, the switch Q1 is open, and R5 participates in voltage division. At this time, the output voltage of the adapter can be determined by the aforementioned formula (2), and when the voltage of the ID Pin is greater than 0 (the specific voltage value depends on the resistance value of R1), the switch Q1 is closed, causing R5 to be short-circuited. At this time, the output voltage of the adapter can be determined by the aforementioned formula (3). It can be seen that when the voltage of the ID Pin is 0, the output voltage of the adapter decreases, causing the adapter to enter a deeper burst mode, the switching frequency decreases, and thus the power consumption is reduced. Thereby, it can meet the requirements of the current relevant regulations for Class 1 energy efficiency and comply with the requirement that the power consumption under no-load conditions is less than 0.075W.

[0134] Exemplarily, as shown in Table 3 below, through actual measurement, based on the current related technology, the output voltage of the adapter under no-load conditions is 20.5V, and the power consumption under no-load conditions is 0.093W; while based on the control method of the power supply device proposed in the embodiments of the present application, the output voltage of the adapter under no-load conditions can be made 18.3V, and the power consumption under no-load conditions is 0.074W, effectively reducing the internal power consumption of the adapter under no-load conditions and meeting the current relevant energy efficiency regulations.

[0135] Table 3

[0136]

[0137] Embodiments of the present application provide a control method for a power supply device. The power supply device can monitor the pin status of the first pin of the power supply device. When the pin status of the first pin indicates that no load device is connected, the first circuit of the power supply device is controlled to be disconnected so that the power supply device has a first output voltage. When the pin status of the first pin indicates that a load device is connected, the first circuit of the power supply device is controlled to be turned on so that the power supply device has a second output voltage. Wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage. Thus, the power supply device can determine whether a load device is currently connected, that is, whether it is in an unloaded state, by setting the pin status of the first pin inside it. When no load device is connected, that is, when the power supply device is in an unloaded state, the power supply device can control the first circuit to be disconnected to obtain the first output voltage in the unloaded state. When a load device is connected, that is, when the power supply device is in a loaded state, the first circuit is controlled to be turned on to obtain the second output voltage, which can make the internal power consumption of the power supply device at the first output voltage less than that at the second output voltage, thereby effectively reducing the internal power consumption of the power supply device in the unloaded state.

[0138] In addition, each functional module in this embodiment can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional module.

[0139] If the integrated unit is implemented in the form of a software functional module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method of this embodiment. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0140] The program instructions corresponding to a control method for a power supply device in this embodiment can be stored on storage media such as optical discs, hard disks, and USB flash drives. When the program instructions corresponding to a control method for a power supply device in the storage medium are read or executed by a power supply device, the following steps are included:

[0141] Monitor the pin status of the first pin of the power supply device;

[0142] When the pin status of the first pin indicates that no load device is connected, control the first circuit of the power supply device to disconnect, so that the power supply device has a first output voltage;

[0143] When the pin status of the first pin indicates that a load device is connected, control the first circuit of the power supply device to conduct, so that the power supply device has a second output voltage;

[0144] Wherein, the internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

[0145] An embodiment of the present application provides a computer program product, including a computer program or instruction. When the computer program or instruction is executed by a processor, the steps in the method provided by the above method embodiment are implemented.

[0146] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects.

[0147] The present application is described with reference to the implementation flow diagrams and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the implementation flow diagram and / or block diagram, and the combination of the processes and / or blocks in the implementation flow diagram and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in one or more processes and / or one or more blocks in the implementation flow diagram. Figure 1 one or more processes and / or Figure 1 one or more blocks

[0148] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device implements the functions specified in one or more processes and / or one or more blocks in the implementation flow diagram. Figure 1 one or more processes and / or Figure 1 one or more blocks

[0149] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes and / or blocks Figure 1 in one or more processes and / or blocks Figure 1 in one or more blocks.

[0150] The above are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application.

Claims

1. A method for controlling a power supply device, comprising: monitoring a pin state of a first pin of a power supply device; When the pin state of the first pin is characterized as not being connected to a load device, controlling the first circuit of the power supply device to be disconnected so that the power supply device has a first output voltage; When the pin state of the first pin is characterized as being connected to a load device, controlling the first circuit of the power supply device to be turned on so that the power supply device has a second output voltage; The internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

2. The control method of the power supply device according to claim 1, wherein: The method further comprises: When the pin state of the first pin is that a signal exists, determining to connect the load device; When the pin state of the first pin is that there is no signal, determining that the load device is not connected; The signal includes at least one of a voltage signal, a clock signal, a data signal, a control signal, and a feedback signal.

3. The control method of the power supply device according to claim 2, wherein: The method further comprises: In response to the first circuit being disconnected, controlling the feedback circuit to output a first feedback voltage, and determining a first internal power consumption of the power supply device based on the first feedback voltage; In response to the first circuit being turned on, controlling the feedback circuit to output a second feedback voltage, and determining a second internal power consumption of the power supply device based on the second feedback voltage; The first internal power consumption is less than the second internal power consumption.

4. The control method of a power supply device according to any one of claims 1 to 3, wherein: The method further comprises: In response to the switch in the first circuit being opened, determining the first output voltage based on a plurality of resistors in a second circuit connected in parallel with the first circuit; In response to the switch in the first circuit closing, the second output voltage is determined based on at least one first resistance in the second circuit; wherein the first resistance represents a resistance in the second circuit that is not short-circuited.

5. The control method of the power supply device according to claim 4, wherein: The method further comprises: The switch in the first circuit is controlled to be closed according to the target gear position, so as to determine the second output voltage based on the first resistance in the second circuit corresponding to the target gear position.

6. The control method of the power supply device according to claim 4, wherein: The method further comprises: Determining a first feedback voltage according to a plurality of resistors in the second circuit; wherein the first feedback voltage is inversely proportional to the resistance values ​​of the plurality of resistors in the second circuit; A second feedback voltage is determined according to the at least one first resistor; wherein the second feedback voltage is inversely proportional to the resistance value of the at least one first resistor.

7. The control method of the power supply device according to claim 3, wherein: The determining the first internal power consumption of the power supply device based on the first feedback voltage includes: When an error voltage between the first feedback voltage and the reference voltage does not meet a preset error voltage condition, adjusting the first feedback voltage based on the amplifier and the first amplification gain to obtain an adjusted feedback voltage; The first output voltage is determined according to the adjusted feedback voltage, and the first internal power consumption is determined according to the first output voltage; wherein an error voltage between the adjusted feedback voltage and the reference voltage meets the preset error voltage condition.

8. A power supply device, comprising: A first pin, used to indicate whether the power supply device is connected to a load device through a pin state; A first circuit is configured to disconnect when the pin state of the first pin is characterized as not being connected to a load device, so that the power supply device has a first output voltage; and to conduct when the pin state of the first pin is characterized as being connected to a load device, so that the power supply device has a second output voltage; The internal power consumption of the power supply device at the first output voltage is less than the internal power consumption of the power supply device at the second output voltage.

9. The power supply device according to claim 8, wherein: The first circuit includes a switch; The switch is used to open when the pin state of the first pin is characterized by no connection to a load device to disconnect the first circuit; and to close when the pin state of the first pin is characterized by connection to a load device to connect the first circuit.

10. The power supply device according to claim 8 or 9, wherein: The power supply device also includes: a second circuit connected in parallel with the first circuit, the second circuit comprising a plurality of resistors; The second circuit is used to obtain the first output voltage based on the multiple resistors when the first circuit is disconnected; and to obtain the second output voltage based on at least one first resistor that is not short-circuited when the first circuit is turned on.

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