Terminal power supply circuit and power supply system

Abstract

The utility model provides a terminal power supply circuit and a power supply system, and the terminal power supply circuit comprises an output control circuit which is connected to a first power supply and electric equipment; the shutdown control circuit is connected with the output control circuit and the electric equipment; the key starting circuit is connected with the output control circuit, the key starting circuit comprises a key, and the key starting circuit is used for outputting a high level signal to the output control circuit under the condition that the key is in a pressed state and outputting a low level signal to the output control circuit under the condition that the key is in a non-pressed state; wherein the output control circuit is used for controlling the first power supply to supply power to the electric equipment under the condition that at least one high-level signal is received, and controlling the first power supply to stop supplying electric energy to the electric equipment under the condition that two low-level signals are received at the same time. According to the terminal power supply circuit, the cost can be reduced, and the anti-interference capability can be improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and more specifically, to a terminal power supply circuit and power supply system. Background Technology

[0002] In related technologies, power supply systems can provide main and backup power supplies for electrical equipment. When the main power supply is insufficient, it can automatically switch to the backup power supply to power the equipment. When the backup power supply is in operation, the terminal power circuit of the power supply system can cut off the backup power supply when the equipment is not operated for a period of time to save the backup power consumption. After the user presses the start button of the terminal power circuit, the backup power supply resumes to power the equipment.

[0003] However, terminal power supply circuits typically implement the above functions through control chips, which results in a relatively complex structure for terminal power supply circuits. Even when the backup power supply stops supplying power to the equipment, the control chip will enter a low-power mode and will still consume the backup power supply's energy. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, the first aspect of this utility model provides a terminal power supply circuit.

[0006] The second aspect of this utility model provides a power supply system.

[0007] The first aspect of this utility model provides a terminal power supply circuit, comprising: an output control circuit connected to a first power supply and a power-consuming device; a power-off control circuit connected to the output control circuit and the power-consuming device, the power-off control circuit being configured to output a low-level signal to the output control circuit when the power-consuming device has not received an operation command for a duration of a first duration; and a button-activated circuit connected to the output control circuit, the button-activated circuit including a button, the button-activated circuit being configured to output a high-level signal to the output control circuit when the button is in a pressed state, and to output a low-level signal to the output control circuit when the button is not pressed; wherein, the output control circuit is configured to control the first power supply to supply power to the power-consuming device when receiving at least one high-level signal, and to control the first power supply to stop supplying power to the power-consuming device when receiving two low-level signals simultaneously.

[0008] The terminal power supply circuit provided by this utility model includes an output control circuit, which is connected to a first power source and the electrical device. It should be noted that the power supply circuit can be used in a power supply system, and the first power source can be a backup power source for the power supply system. Specifically, the power supply system can include a main power source and a backup power source. When the main power source is insufficient, it can automatically switch to the backup power source to supply power to the electrical device. The output control circuit can control the connection and disconnection between the backup power source and the electrical device.

[0009] Furthermore, the terminal power supply circuit also includes a power-off control circuit and a button start circuit. Both the power-off control circuit and the button start circuit are connected to the output control circuit. The output control circuit can automatically cut off and restart the first power supply based on the level signals output by the power-off control circuit and the button start circuit.

[0010] Specifically, when at least one of the power-off control circuit and the button-start circuit outputs a high-level signal to the output control circuit, the control circuit can transfer electrical energy from the first power supply to the electrical device. Conversely, when both the power-off control circuit and the button-start circuit simultaneously output a low-level signal to the output control circuit, the control circuit can control the first power supply to stop supplying power to the electrical device, that is, cut off the power supply of the first power supply.

[0011] The button-activated circuit includes a button. When the button is pressed, the button-activated circuit outputs a high-level signal to the output control circuit, which then controls the first power supply to power the device. Conversely, when the button is not pressed, the button-activated circuit outputs a low-level signal to the output control circuit. In this case, if the power-off control circuit outputs a high-level signal to the output control circuit, the output control circuit continues to control the first power supply to power the device; conversely, if the power-off control circuit outputs a low-level signal, the output control circuit stops controlling the first power supply to power the device.

[0012] Specifically, the shutdown control circuit is also connected to the electrical equipment. When the electrical equipment does not receive an operation command for a continuous period of time, that is, when the electrical equipment has not been operated for a long time, the shutdown control circuit can output a low-level signal to the output control circuit. At this time, since the button of the button start circuit is in the unpressed state, that is, the shutdown control circuit and the button start circuit simultaneously output a low-level signal to the output control circuit. At this time, the output control circuit can control the first power supply to stop supplying power to the electrical equipment, that is, to realize the automatic stop of power supply when the electrical equipment has not been operated for a long time.

[0013] Conversely, when the electrical equipment is operating normally, that is, when the electrical equipment has not been idle for a long time, the shutdown control circuit outputs a high-level signal to the output control circuit. At this time, the output control circuit normally controls the first power supply to supply power to the electrical equipment.

[0014] The terminal power supply circuit provided by this utility model, by setting up an output control circuit, a shutdown control circuit, and a button start circuit, can automatically stop powering to the device if the device has not been operated for a long time during the process of the first power supply supplying power to the device. When the user presses the button of the button start circuit, power can be restored to the device through the first power supply. Compared with the control chip method used in related technologies to achieve the above functions, this utility model realizes shutdown and restart control based on the high and low level signals output by the shutdown control circuit and the button start circuit. On the one hand, it can simplify the structure of the terminal power supply circuit, save costs, and reduce power consumption. On the other hand, it can also improve the anti-interference capability and operational stability of the terminal power supply circuit.

[0015] In addition, the terminal power supply circuit in the above-described technical solution provided by this utility model may also have the following additional technical features:

[0016] In some technical solutions, the output control circuit optionally includes: a first switch, the first end of which is connected to a second power supply, the second end of which is grounded, and the control terminal of which is connected to a power-off control circuit and a button start circuit; and a second switch, the first end of which is connected to a second power supply, the second end of which is connected to an electrical device, and the control terminal of which is connected to the first end of the first switch.

[0017] In some technical solutions, the output control circuit may optionally include: a first diode, the anode of which is connected to the power-off control circuit, and the cathode of which is connected to the control terminal of the first switch; and a second diode, the anode of which is connected to the button start circuit, and the cathode of which is connected to the control terminal of the first switch.

[0018] In some technical solutions, the output control circuit may optionally include: a third diode, the positive terminal of which is connected to the second terminal of the second switching element, and the negative terminal of which is connected to the electrical equipment; and a fourth diode, which is connected in parallel with the third diode.

[0019] In some technical solutions, the button activation circuit further includes: a delay circuit, the first end of which is connected to a second power supply, and the second end of which is connected to the button; and a signal conversion circuit, the first end of which is connected to the second power supply, the second end of which is connected to the delay circuit, and the third end of which is connected to the output control circuit. The delay circuit outputs a high-level signal to the signal conversion circuit when the button is pressed for a first duration, and outputs a low-level signal to the signal conversion circuit when the button is not pressed for a second duration. The signal conversion circuit outputs a high-level signal to the output control circuit upon receiving a high-level signal, and outputs a low-level signal to the output control circuit upon receiving a low-level signal.

[0020] In some technical solutions, the delay circuit optionally includes: a first resistor, the first end of which is connected to a second power supply; a second resistor, the first end of which is connected to the second end of the first resistor, and the second end of which is connected to a button; and an energy storage capacitor bank, which is connected in parallel with the second resistor and is connected to a signal conversion circuit.

[0021] In some technical solutions, optionally, the signal conversion circuit includes: a third switch, the first end of which is connected to the second power supply, the second end of which is grounded, and the control terminal of which is connected to the energy storage capacitor bank; a fourth switch, the first end of which is connected to the second power supply, the second end of which is connected to the output control circuit, and the control terminal of which is connected to the first end of the third switch; and a third resistor connected between the first end of the fourth switch and the control terminal of the fourth switch.

[0022] In some technical solutions, the button start circuit may optionally include: a first filter capacitor, the first end of which is connected to the second end of the fourth switch, and the second end of which is grounded; and a first filter resistor, which is connected in parallel with the first filter capacitor.

[0023] In some technical solutions, optionally, the shutdown control circuit includes: a detection module connected to the electrical equipment for detecting the operation command of the electrical equipment; a fifth switch, the first end of which is connected to a second power supply, the second end of which is grounded, and the control end of which is connected to the detection module; wherein the first end of the fifth switch is also connected to an output control circuit, and the detection module is used to control the fifth switch to conduct when the duration for which the electrical equipment has not received an operation command reaches a first duration, so as to output a low-level signal to the output control circuit.

[0024] In some technical solutions, the shutdown control circuit may optionally include: a second filter capacitor, the two ends of which are respectively connected to the control terminal of the fifth switch and the second terminal of the fifth switch; a second filter resistor, which is connected in parallel with the second filter capacitor; a fourth resistor, which is connected between the detection module and the control terminal of the fifth switch; and a fifth resistor, which is connected between the power supply and the first terminal of the fifth switch.

[0025] According to a second aspect of the present invention, a power supply system is proposed, comprising a first power source and a terminal power supply circuit as described in any of the above technical solutions, wherein the terminal power supply circuit is connected to the first power source.

[0026] The power supply system proposed in this utility model includes a terminal power supply circuit of any of the above technical solutions. Therefore, the power supply system has all the beneficial effects of the above terminal power supply circuit, which will not be repeated here.

[0027] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 A circuit diagram of the power supply system according to an embodiment of the present invention is shown;

[0030] Figure 2 It shows Figure 1 Circuit diagram of the output control circuit;

[0031] Figure 3 It shows Figure 1 Circuit diagram of the push-button start circuit;

[0032] Figure 4 It shows Figure 1 Circuit diagram of the shutdown control circuit.

[0033] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0034] 100 Terminal power supply circuit, 102 Output control circuit, 104 Power-off control circuit, 106 Key start circuit, 108 Key, 110 First switch, 112 Second power supply, 114 Second switch, 116 First diode, 118 Second diode, 120 Third diode, 122 Fourth diode, 124 Delay circuit, 126 Signal conversion circuit, 128 First resistor, 130 Second resistor, 132 Energy storage capacitor bank, 134 Third switch, 136... Four switching components, 138 third resistor, 140 first filter capacitor, 142 first filter resistor, 144 detection module, 146 fifth switching component, 148 second filter capacitor, 150 second filter resistor, 152 fourth resistor, 154 fifth resistor, 156 first voltage divider resistor, 158 second voltage divider resistor, 160 third voltage divider resistor, 162 voltage divider capacitor, 164 first capacitor, 166 second capacitor, 200 power supply system, 202 first power supply, 300 electrical equipment. Detailed Implementation

[0035] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] The following reference Figure 1 and Figure 4 This invention describes a terminal power supply circuit and power supply system provided according to some embodiments of the present invention.

[0038] This utility model provides a terminal power supply circuit 100, such as Figure 1As shown, the device includes: an output control circuit 102 connected to a first power supply 202 and a power-consuming device 300; a power-off control circuit 104 connected to the output control circuit 102 and the power-consuming device 300, the power-off control circuit 104 being used to output a low-level signal to the output control circuit 102 when the power-consuming device 300 has not received an operation command for a duration of a first duration; and a key-activated circuit 106 connected to the output control circuit 102, the key-activated circuit 106 including a key 108, the key-activated circuit 106 being used to output a high-level signal to the output control circuit 102 when the key 108 is in a pressed state, and to output a low-level signal to the output control circuit 102 when the key 108 is not pressed; wherein, the output control circuit 102 is used to control the first power supply 202 to supply power to the power-consuming device 300 when receiving at least one high-level signal, and to control the first power supply 202 to stop supplying power to the power-consuming device 300 when receiving two low-level signals simultaneously.

[0039] The terminal power supply circuit 100 provided by this utility model includes an output control circuit 102, which is connected to a first power source 202 and an electrical device 300. It should be noted that the power supply circuit can be used in a power supply system, and the first power source 202 can be a backup power source for the power supply system. Specifically, the power supply system can include a main power source and a backup power source. When the main power source is insufficient, it can automatically switch to the backup power source to supply power to the electrical device 300. The output control circuit 102 can control the connection and disconnection between the backup power source and the electrical device 300.

[0040] Furthermore, the terminal power supply circuit 100 also includes a power-off control circuit 104 and a key-activated circuit 106. Both the power-off control circuit 104 and the key-activated circuit 106 are connected to the output control circuit 102. The output control circuit 102 can automatically cut off and restart the first power supply 202 according to the level signals output by the power-off control circuit 104 and the key-activated circuit 106.

[0041] Specifically, when at least one of the power-off control circuit 104 and the key-button start circuit 106 outputs a high-level signal to the output control circuit 102, the control circuit can transfer electrical energy from the first power supply 202 to the electrical device 300. Conversely, when both the power-off control circuit 104 and the key-button start circuit 106 simultaneously output a low-level signal to the output control circuit 102, the control circuit can control the first power supply 202 to stop supplying power to the electrical device 300, that is, cut off the power supply of the first power supply 202.

[0042] The button-activated circuit 106 includes a button 108. When the button 108 is pressed, the button-activated circuit 106 outputs a high-level signal to the output control circuit 102. At this time, the output control circuit 102 controls the first power supply 202 to supply power to the device 300. Conversely, when the button 108 is not pressed, the button-activated circuit 106 outputs a low-level signal to the output control circuit 102. At this time, if the power-off control circuit 104 outputs a high-level signal to the output control circuit 102, the output control circuit 102 continues to control the first power supply 202 to supply power to the device 300. Conversely, if the power-off control circuit 104 outputs a low-level signal to the output control circuit 102, the output control circuit 102 stops controlling the first power supply 202 to supply power to the device 300.

[0043] Specifically, the shutdown control circuit 104 is also connected to the electrical equipment 300. When the duration for which the electrical equipment 300 does not receive an operation command reaches a first duration, that is, when the electrical equipment 300 has not been operated for a long time, the shutdown control circuit 104 can output a low-level signal to the output control circuit 102. At this time, since the button 108 of the button start circuit 106 is in the unpressed state, that is, the shutdown control circuit 104 and the button start circuit 106 simultaneously output a low-level signal to the output control circuit 102. At this time, the output control circuit 102 can control the first power supply 202 to stop supplying power to the electrical equipment 300, that is, to realize the automatic stop of power supply when the electrical equipment 300 has not been operated for a long time.

[0044] Conversely, when the electrical equipment 300 is operating normally, that is, when the electrical equipment 300 has not been operated for a long time, the shutdown control circuit 104 outputs a high-level signal to the output control circuit 102. At this time, the output control circuit 102 normally controls the first power supply 202 to supply power to the electrical equipment 300.

[0045] The terminal power supply circuit 100 provided by this utility model, through the setting of an output control circuit 102, a shutdown control circuit 104, and a key-activated circuit 106, can automatically stop powering to the device 300 if the device 300 has not been operated for a long time during the process of the first power supply 202 supplying power to the device 300. When the user presses the button 108 of the key-activated circuit 106, power can be restored to the device 300 through the first power supply 202. Compared with the use of control chips to achieve the above functions in related technologies, this utility model realizes shutdown and restart control by using the high and low level signals output by the shutdown control circuit 104 and the key-activated circuit 106. On the one hand, it can simplify the structure of the terminal power supply circuit 100 and save the cost of the terminal power supply circuit 100. On the other hand, it can also improve the anti-interference capability and operational stability of the terminal power supply circuit 100.

[0046] In some embodiments, optionally, such as Figure 2 As shown, the output control circuit 102 includes: a first switch 110, the first end of which is connected to the second power supply 112, the second end of which is grounded, and the control terminal of which is connected to the power off control circuit 104 and the button start circuit 106; and a second switch 114, the first end of which is connected to the second power supply 112, the second end of which is connected to the electrical device 300, and the control terminal of which is connected to the first end of the first switch 110.

[0047] In this embodiment, the output control circuit 102 may include a first switch 110 and a second switch 114. The control terminal of the first switch 110 is connected to the power-off control circuit 104 and the key-activated circuit 106, thereby controlling the first switch 110 to be turned on or off according to the high or low level signals output by the power-off control circuit 104 and the key-activated circuit 106. Specifically, when at least one of the power-off control circuit 104 and the key-activated circuit 106 outputs a high level to the control terminal of the first switch 110, both ends of the first switch 110 are in a conducting state. Conversely, when both the power-off control circuit 104 and the key-activated circuit 106 simultaneously output a low level to the control terminal of the first switch 110, both ends of the first switch 110 are in a turning-off state.

[0048] Furthermore, the first terminal of the first switch 110 is connected to the second power supply 112, the second terminal of the first switch 110 is grounded, and the control terminal of the second switch 114 is connected to the first terminal of the first switch 110. Thus, when the first switch 110 is on, its first terminal is at a low level, meaning the control terminal of the second switch 114 is also at a low level. At this time, the two ends of the second switch 114 are on, and the first power supply 202 supplies power to the electrical device 300. Conversely, when the two ends of the first switch 110 are off, its first terminal is at a high level, meaning the control terminal of the second switch 114 is also at a high level. At this time, the two ends of the second switch 114 are off, and the first power supply 202 stops supplying power to the electrical device 300.

[0049] Specifically, the second power supply 112 can be a power supply that provides a low-voltage signal to the first switching element 110 and the second switching element 114, and the voltage of the second power supply 112 can be 5V. The first switching element 110 can be a transistor, and the second switching element 114 can be a P-type metal-oxide-semiconductor field-effect transistor.

[0050] In some embodiments, optionally, such as Figure 2 As shown, the output control circuit 102 further includes: a first diode 116, the positive terminal of which is connected to the power-off control circuit 104, and the negative terminal of which is connected to the control terminal of the first switch 110; and a second diode 118, the positive terminal of which is connected to the button start circuit 106, and the negative terminal of which is connected to the control terminal of the first switch 110.

[0051] In this embodiment, the output control circuit 102 may further include a first diode 116 and a second diode 118. The anode of the first diode 116 is connected to the power-off control circuit 104, and the cathode of the first diode 116 is connected to the control terminal of the first switch 110. That is, the level signal output by the power-off control circuit 104 is transmitted to the control terminal of the first switch 110 through the first diode 116. By setting the first diode 116, based on the unidirectional conduction characteristic of the diode, the current of the first switch 110 can be prevented from flowing back to the power-off control circuit 104, thereby preventing the terminal power supply circuit 100 from malfunctioning.

[0052] Correspondingly, the positive terminal of the second diode 118 is connected to the button-activated circuit 106, and the negative terminal of the second diode 118 is connected to the control terminal of the first switch 110. That is, the level signal output by the button-activated circuit 106 is transmitted to the control terminal of the first switch 110 through the second diode 118. By setting the second diode 118, based on the unidirectional conduction characteristic of the diode, the current of the first switch 110 can be prevented from flowing back to the button-activated circuit 106, thereby preventing the terminal power supply circuit 100 from malfunctioning.

[0053] Furthermore, such as Figure 2 As shown, the output control circuit 102 may further include voltage dividing resistors and voltage dividing capacitors 162. Specifically, the voltage dividing resistors may include a first voltage dividing resistor 156, a second voltage dividing resistor 158, and a third voltage dividing resistor 160. The first terminal of the first voltage dividing resistor 156 is connected to the cathode of the first diode 116 and the second diode 118. The first terminal of the second voltage dividing resistor 158 is connected to the second terminal of the first voltage dividing resistor 156, and the second terminal of the second voltage dividing resistor 158 is connected to the control terminal of the first switching element 110. The first terminal of the third voltage dividing resistor 160 is connected to the second terminal of the second voltage dividing resistor 158, and the second terminal of the third voltage dividing resistor 160 is connected to the second terminal of the first switching element 110. The first terminal of the voltage dividing capacitor 162 is connected to the second terminal of the first voltage dividing resistor 156, and the second terminal of the voltage dividing capacitor 162 is connected to the second terminal of the first switching element 110. By setting the first voltage divider resistor 156, the second voltage divider resistor 158, the third voltage divider resistor 160 and the voltage divider capacitor 162, the voltage provided by the second power supply 112 can be divided, thereby avoiding excessive current flowing through the first diode 116, the second diode 118 and the first switch 110, which could cause them to burn out, and ensuring the stable operation of the terminal power supply circuit 100.

[0054] In some embodiments, optionally, such as Figure 2 As shown, the output control circuit 102 further includes: a third diode 120, the positive terminal of the third diode 120 is connected to the second terminal of the second switch 114, and the negative terminal of the third diode 120 is connected to the electrical device 300; and a fourth diode 122, which is connected in parallel with the third diode 120.

[0055] In this embodiment, the output control circuit 102 may further include a third diode 120 and a fourth diode 122. The anode of the third diode 120 is connected to the second terminal of the second switch 114, and the cathode of the third diode 120 is connected to the electrical device 300. Simultaneously, the fourth diode 122 is connected in parallel with the third diode 120. That is, the third diode 120 and the fourth diode 122 are connected between the second switch 114 and the electrical device 300. By using the third diode 120 and the fourth diode 122, and utilizing the unidirectional conduction characteristic of diodes, it is possible to prevent the current from flowing backwards from the electrical device 300 to the second switch 114 during operation, thereby preventing a malfunction in the terminal power supply circuit 100.

[0056] In some embodiments, optionally, such as Figure 3 As shown, the button activation circuit 106 further includes: a delay circuit 124, the first end of which is connected to the second power supply 112, and the second end of which is connected to the button 108; and a signal conversion circuit 126, one end of which is connected to the second power supply 112, the second end of which is connected to the delay circuit 124, and the third end of which is connected to the output control circuit 102. The delay circuit 124 outputs a high-level signal to the signal conversion circuit 126 when the button 108 is pressed for a second duration, and outputs a low-level signal to the signal conversion circuit 126 when the button 108 is not pressed for a third duration. The signal conversion circuit 126 outputs a high-level signal to the output control circuit 102 when it receives a high-level signal, and outputs a low-level signal to the output control circuit 102 when it receives a low-level signal.

[0057] In this embodiment, the button-activated circuit 106 may include a delay circuit 124 and a signal conversion circuit 126. By setting the delay circuit 124 and connecting the signal conversion circuit 126 to the delay circuit 124, delay control of the signal conversion circuit 126 can be achieved. That is, after the user presses the button 108 and a second duration has elapsed, the signal conversion circuit 126 transmits a high-level signal to the output control circuit 102, thereby achieving delayed power supply to the electrical device 300. Simultaneously, when the button 108 is in the unpressed state for a third duration, the signal conversion circuit 126 transmits a low-level signal to the control circuit.

[0058] Specifically, the first terminal of the delay circuit 124 is connected to the second power supply 112, the second terminal of the delay circuit 124 is connected to the button 108, and the first terminal of the signal conversion circuit 126 is connected to the second power supply 112, the second terminal of the signal conversion circuit 126 is connected to the delay circuit 124, and the third terminal of the signal conversion circuit 126 is connected to the output control circuit 102. The second power supply 112 can be a power source providing low-voltage signals to the delay circuit 124 and the signal conversion circuit 126, and the voltage of the second power supply 112 can be 5V.

[0059] After the user presses button 108 and holds it for a second duration, the delay circuit 124 outputs a high-level signal to the signal conversion circuit 126. At this time, the signal conversion circuit 126 controls the first terminal and the third terminal to conduct according to the received high-level signal, thereby outputting a high-level signal to the output control circuit 102. The output control circuit 102 controls the power supply to supply power to the electrical device 300. Conversely, after the user presses button 108 and holds it for a third duration, the delay circuit 124 outputs a low-level signal to the signal conversion circuit 126. At this time, the signal conversion circuit 126 controls the first terminal and the third terminal to turn off according to the received low-level signal, thereby outputting a low-level signal to the output control circuit 102.

[0060] In some embodiments, optionally, such as Figure 3 As shown, the delay circuit 124 includes: a first resistor 128, the first end of which is connected to the second power supply 112; a second resistor 130, the first end of which is connected to the second end of the first resistor 128, and the second end of which is connected to the button 108; and an energy storage capacitor bank 132, which is connected in parallel with the second resistor 130 and is connected to the signal conversion circuit 126.

[0061] In this embodiment of the application, the delay circuit 124 may include a first resistor 128, a second resistor 130, and an energy storage capacitor group 132. The first end of the first resistor 128 is connected to the second power supply 112, the first end of the second resistor 130 is connected to the second end of the first resistor 128, the second end of the second resistor 130 is connected to the button 108, the energy storage capacitor group 132 is connected in parallel with the second resistor 130, and the energy storage capacitor group 132 is connected to the signal conversion circuit 126.

[0062] By setting the first resistor 128, the second resistor 130 and the energy storage capacitor group 132, the energy storage capacitor group 132 can be charged when the button 108 is pressed. Furthermore, since the energy storage capacitor group 132 is connected to the signal conversion circuit 126, when the voltage of the energy storage capacitor group 132 reaches the conversion value of the signal conversion circuit 126, the signal conversion circuit 126 can output a high-level signal to the output control circuit 102.

[0063] Further, the signal conversion circuit 126 includes: a third switch 134, the first terminal of which is connected to the second power supply 112, the second terminal of which is grounded, and the control terminal of which is connected to the energy storage capacitor bank 132; a fourth switch 136, the first terminal of which is connected to the second power supply 112, the second terminal of which is connected to the output control circuit 102, and the control terminal of which is connected to the first terminal of the third switch 134; and a third resistor 138, which is connected between the first terminal of the fourth switch 136 and the control terminal of the fourth switch 136.

[0064] Specifically, the signal conversion circuit 126 may include a third switch 134 and a fourth switch 136. The control terminal of the third switch 134 is connected to the energy storage capacitor bank 132. After the button 108 is pressed, the energy storage capacitor bank 132 begins charging. When the voltage of the energy storage capacitor bank 132 reaches the turn-on voltage of the third switch 134, the first and second terminals of the third switch 134 are connected. Further, the control terminal of the fourth switch 136 is connected to the first terminal of the third switch 134. When the third switch 134 is on, its first terminal is grounded, and the control terminal of the fourth switch 136 is in a low-level state. At this time, the first and second terminals of the fourth switch 136 are connected, and the fourth switch 136 outputs a high-level signal to the output control circuit 102. Conversely, when the first and second terminals of the third switch 134 are turned off, the first terminal of the third switch 134 is in a high-level state, which means that the control terminal of the fourth switch 136 is in a high-level state. At this time, the first and second terminals of the fourth switch 136 are in a closed state, and the fourth switch 136 outputs a low-level signal to the output control circuit 102.

[0065] Specifically, the third switch 134 can be a P-type metal-oxide-semiconductor field-effect transistor, and the fourth switch 136 can be an N-type metal-oxide-semiconductor field-effect transistor.

[0066] Furthermore, the signal conversion circuit 126 also includes a third resistor 138, which is located between the control terminal of the fourth switch 136 and the first terminal of the fourth switch 136. The third resistor 138 divides the voltage provided by the second power supply 112 to ensure the stable operation of the fourth switch 136.

[0067] For example, the delay duration of the delay circuit 124, i.e., the second duration, can be set according to the resistance value of the first resistor 128 and the capacitance value of the energy storage capacitor group 132. The energy storage capacitor group 132 may include a first capacitor 164 and a second capacitor 166, which are connected in parallel. The delay duration can be calculated according to the following formula:

[0068]

[0069] Where t1 is the second duration, R1 is the resistance of the first resistor 128, C1 is the capacitance of the first capacitor 164, C2 is the capacitance of the second capacitor 166, Backup power is the voltage of the second power supply 112, and VE is the conduction voltage of the third switch 134. Specifically, after the button 108 is pressed, the first capacitor 164 and the second capacitor 166 begin to charge. When the voltage across the first capacitor 164 and the second capacitor 166 reaches the conduction voltage of the third switch 134, the third switch 134 becomes conductive. At this time, the control terminal of the fourth switch 136 is in a low-level state, and the fourth switch 136 is in a conductive state. At this time, the button activation circuit 106 outputs a high level to the output control circuit 102.

[0070] Furthermore, the third duration can be calculated using the following formula:

[0071]

[0072] Where t2 is the third duration, R2 is the resistance of the second resistor 130, C1 is the capacitance of the first capacitor 164, C2 is the capacitance of the second capacitor 166, VE is the conduction voltage of the third switch 134, and VE1 is the highest voltage value that the first capacitor 164 and the second capacitor 166 can reach.

[0073] In some embodiments, optionally, such as Figure 3 As shown, the button start circuit 106 further includes: a first filter capacitor 140, the first end of which is connected to the second end of the fourth switch 136, and the second end of which is grounded; and a first filter resistor 142, which is connected in parallel with the first filter capacitor 140.

[0074] In this embodiment, the button-activated circuit 106 may further include a first filter capacitor 140 and a first filter resistor 142. The first terminal of the first filter capacitor 140 is connected to the second terminal of the fourth switch 136, and the second terminal of the first filter capacitor 140 is grounded. The first filter resistor 142 is connected in parallel with the first filter capacitor 140. By configuring the first filter capacitor 140 and the first filter resistor 142, interference signals can be filtered out from the level signal output to the output control circuit 102, ensuring a stable output of the level signal.

[0075] In some embodiments, optionally, such as Figure 4 As shown, the shutdown control circuit 104 includes: a detection module 144 connected to the electrical equipment 300 for detecting the operation commands of the electrical equipment 300; a fifth switch 146, the first end of which is connected to the second power supply 112, the second end of which is grounded, and the control terminal of which is connected to the detection module 144; wherein, the first end of the fifth switch 146 is also connected to the output control circuit 102, and the detection module 144 is used to control the fifth switch 146 to conduct when the duration for which the electrical equipment 300 has not received an operation command reaches a first duration, so as to output a low-level signal to the output control circuit 102.

[0076] In this embodiment, the shutdown control circuit 104 may include a detection module 144, which is connected to the electrical device 300. The detection module 144 can detect whether the electrical device 300 has received an operation command via a detection signal. Specifically, if the electrical device 300 has not received an operation command for a duration of a first duration, a low-level signal is output; conversely, the detection module 144 outputs a high-level signal.

[0077] Furthermore, the shutdown control circuit 104 also includes a fifth switch 146. The first terminal of the fifth switch 146 is connected to the second power supply 112, and the second terminal of the fifth switch 146 is grounded. The second power supply 112 can be a power source providing a low-voltage signal to the fifth switch 146, and the voltage of the second power supply 112 can be 5V. Additionally, the first terminal of the fifth switch 146 is also connected to the output control circuit 102.

[0078] Specifically, when the duration for which the electrical equipment 300 has not received an operation command reaches a first duration, the detection module 144 outputs a low-level signal. When the control terminal of the fifth switch 146 receives the low-level signal, the fifth switch 146 is in a conducting state, and at this time, the first terminal of the fifth switch 146 is in a low-level state, that is, it outputs a low-level signal to the output control circuit 102. Conversely, when the fifth switch 146 is in a closed state, the first terminal of the fifth switch 146 is in a high-level state, that is, it outputs a high-level signal to the output control circuit 102.

[0079] Furthermore, the shutdown control circuit 104 also includes: a second filter capacitor 148, the two ends of which are respectively connected to the control terminal of the fifth switch 146 and the second terminal of the fifth switch 146; and a second filter resistor 150, which is connected in parallel with the second filter capacitor 148.

[0080] Specifically, the shutdown control circuit 104 also includes a second filter capacitor 148 and a second filter resistor 150, wherein the two ends of the second filter capacitor 148 are respectively connected to the control terminal of the fifth switch 146 and the second terminal of the fifth switch 146. By setting the second filter capacitor 148 and the second filter resistor 150, interference signals can be filtered out from the high-level signal output by the detection module 144, ensuring a stable output of the level signal.

[0081] Furthermore, the shutdown control circuit 104 also includes: a fourth resistor 152, which is connected between the control terminal of the detection module 144 and the fifth switch 146; and a fifth resistor 154, which is connected between the second power supply 112 and the first terminal of the fifth switch 146.

[0082] Specifically, the shutdown control circuit 104 also includes a fourth resistor 152. The fourth resistor 152 is set between the detection module 144 and the control terminal of the fifth switch 146. By setting the fourth resistor 152, the voltage of the control terminal of the fifth switch 146 can be divided to avoid the fifth switch 146 from being damaged due to excessive voltage at the control terminal.

[0083] Furthermore, the shutdown control circuit 104 also includes a fifth resistor 154, which is disposed between the second power supply 112 and the first terminal of the fifth switch 146. By using the fifth resistor 154, the voltage supplied by the second power supply 112 can be divided, preventing damage caused by excessively high voltage at the first terminal of the fifth resistor 154, and also preventing damage to the output control circuit 102 caused by excessively high voltage of the signal received at the output control terminal.

[0084] In some embodiments of this utility model, such as Figure 1 As shown, a power supply system 200 is also proposed, including a first power supply 202; and a terminal power supply circuit 100 as in any of the above embodiments, wherein the terminal power supply circuit 100 is connected to the power supply.

[0085] The power supply system 200 proposed in this utility model can transmit electrical energy from the first power supply 202 to the electrical device 300 when at least one of the power-off control circuit 104 and the key-activated circuit 106 outputs a high-level signal to the output control circuit 102. Conversely, when both the power-off control circuit 104 and the key-activated circuit 106 simultaneously output a low-level signal to the output control circuit 102, the control circuit can control the first power supply 202 to stop supplying power to the electrical device 300, that is, cut off the power supply of the first power supply 202. When the key 108 is in the pressed state, the key-activated circuit 106 can output a high-level signal to the output control circuit 102, at which time the output control circuit 102 can control the first power supply 202 to supply power to the electrical device 300. Conversely, when button 108 is not pressed, button activation circuit 106 outputs a low-level signal to output control circuit 102. At this time, if power off control circuit 104 outputs a high-level signal to output control circuit 102, output control circuit 102 continues to control the first power supply 202 to supply power to device 300. Conversely, if power off control circuit 104 outputs a low-level signal to output control circuit 102, output control circuit 102 stops controlling the first power supply 202 to supply power to device 300.

[0086] By configuring an output control circuit 102, a power-off control circuit 104, and a key-activated circuit 106, during the process of the first power supply 202 supplying power to the device 300, if the device 300 is not operated for a long time, the power supply to the device 300 can be automatically stopped. When the user presses the button 108 of the key-activated circuit 106, the power supply to the device 300 can be restarted through the first power supply 202. Compared with the use of control chips in related technologies to achieve the above functions, this utility model achieves power-off and restart control based on the high and low level signals output by the power-off control circuit 104 and the key-activated circuit 106. On the one hand, it can simplify the structure of the terminal power supply circuit 100 and save the cost of the terminal power supply circuit 100. On the other hand, it can also improve the anti-interference capability of the terminal power supply circuit 100 and improve the stability of the operation of the terminal power supply circuit 100.

[0087] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0088] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A terminal power supply circuit, characterized in that, include: An output control circuit, wherein the output control circuit is connected to a first power source and an electrical device; A shutdown control circuit is connected to the output control circuit and the electrical equipment. The shutdown control circuit is used to output a low-level signal to the output control circuit when the duration during which the electrical equipment does not receive an operation command reaches a first duration. A button-activated circuit is connected to the output control circuit. The button-activated circuit includes a button. The button-activated circuit is used to output a high-level signal to the output control circuit when the button is in the pressed state, and to output a low-level signal to the output control circuit when the button is in the unpressed state. The output control circuit is configured to control the first power supply to supply power to the electrical device when at least one high-level signal is received, and to control the first power supply to stop supplying power to the electrical device when two low-level signals are received simultaneously.

2. The terminal power supply circuit according to claim 1, characterized in that, The output control circuit includes: A first switch, the first end of the first switch is connected to a second power supply, the second end of the first switch is grounded, and the control end of the first switch is connected to the power-off control circuit and the button start circuit; A second switch has a first end connected to the second power source, a second end connected to the electrical equipment, and a control terminal connected to the first end of the first switch.

3. The terminal power supply circuit according to claim 2, characterized in that, The output control circuit also includes: A first diode, the positive terminal of which is connected to the power-off control circuit, and the negative terminal of which is connected to the control terminal of the first switch. The second diode has its anode connected to the button start circuit and its cathode connected to the control terminal of the first switch.

4. The terminal power supply circuit according to claim 2, characterized in that, The output control circuit also includes: The third diode, the positive terminal of which is connected to the second terminal of the second switching element, and the negative terminal of which is connected to the electrical equipment; A fourth diode, which is connected in parallel with the third diode.

5. The terminal power supply circuit according to claim 1, characterized in that, The button activation circuit also includes: A delay circuit, wherein the first terminal of the delay circuit is connected to a second power supply, and the second terminal of the delay circuit is connected to the button; A signal conversion circuit, wherein a first terminal of the signal conversion circuit is connected to a second power supply, a second terminal of the signal conversion circuit is connected to the delay circuit, and a third terminal of the signal conversion circuit is connected to the output control circuit; The delay circuit is configured to output a high-level signal to the signal conversion circuit when the button is pressed for a second duration, and to output a low-level signal to the signal conversion circuit when the button is not pressed for a third duration. The signal conversion circuit is configured to output a high-level signal to the output control circuit when it receives a high-level signal, and to output a low-level signal to the output control circuit when it receives a low-level signal.

6. The terminal power supply circuit according to claim 5, characterized in that, The delay circuit includes: A first resistor, the first end of which is connected to the second power supply; A second resistor, the first end of which is connected to the second end of the first resistor, and the second end of which is connected to the button; An energy storage capacitor bank is connected in parallel with the second resistor and is connected to the signal conversion circuit.

7. The terminal power supply circuit according to claim 6, characterized in that, The signal conversion circuit includes: The third switch has a first terminal connected to the second power supply, a second terminal grounded, and a control terminal connected to the energy storage capacitor bank. The fourth switch has a first terminal connected to the second power supply, a second terminal connected to the output control circuit, and a control terminal connected to the first terminal of the third switch. The third resistor is connected between the first terminal of the fourth switch and the control terminal of the fourth switch.

8. The terminal power supply circuit according to claim 7, characterized in that, The button activation circuit also includes: A first filter capacitor, the first end of which is connected to the second end of the fourth switch, and the second end of which is grounded. The first filter resistor is connected in parallel with the first filter capacitor.

9. The terminal power supply circuit according to claim 1, characterized in that, The shutdown control circuit includes: A detection module, connected to the electrical equipment, is used to detect the operating commands of the electrical equipment; The fifth switch has a first terminal connected to the second power supply, a second terminal grounded, and a control terminal connected to the detection module. The first end of the fifth switch is also connected to the output control circuit. The detection module is used to control the fifth switch to turn on when the duration for which the electrical equipment has not received an operation command reaches a first duration, so as to output a low-level signal to the output control circuit.

10. The terminal power supply circuit according to claim 9, characterized in that, The shutdown control circuit also includes: The second filter capacitor is connected at both ends to the control terminal of the fifth switch and the second terminal of the fifth switch, respectively. The second filter resistor is connected in parallel with the second filter capacitor; A fourth resistor is connected between the detection module and the control terminal of the fifth switch. A fifth resistor is connected between the second power supply and the first terminal of the fifth switch.

11. A power supply system, characterized in that, include: First power source; The terminal power supply circuit according to any one of claims 1 to 10, wherein the terminal power supply circuit is connected to the first power supply.

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