Delay power supply circuit and delay device

Abstract

This utility model discloses a time-delay power supply circuit and a time-delay device, relating to the field of electronic circuit technology. The disclosed time-delay power supply circuit includes: a power delay module and a first switching device; a first terminal of the power delay module is connected to a first terminal of the first switching device, a second terminal of the first switching device is connected to a power supply device, and a second terminal of the power delay module is connected to a load. When the first switching device is closed, the power delay module receives the power supply voltage output by the power supply device and stores energy; when the stored energy voltage reaches a preset voltage threshold, the load is connected to the power supply device so that the power supply device drives the load; when the first switching device is open, the stored energy voltage is released to drive the load; when the released stored energy voltage is lower than the preset voltage threshold, the load is disconnected, thereby effectively avoiding damage to the power supply device caused by hot-plugging.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to a time delay power supply circuit and a time delay device. Background Technology

[0002] Hot-swapping refers to connecting or disconnecting a load without disconnecting the power supply. In hot-swapping scenarios, when a load is inserted, the capacitor on the load generates a momentary high current demand on the power supply, creating a surge current that can impact and damage the power supply. When the load is removed, the charge stored in the capacitor on the load may flow back into the power supply through certain paths, causing reverse current and also resulting in damage. Therefore, hot-swapping can lead to damage to power supply equipment. Utility Model Content

[0003] The main purpose of this utility model is to provide a time-delay power supply circuit and a time-delay device, which aims to solve the technical problem that the power supply equipment will be damaged in the hot-plugging scenario, as is the case with the prior art.

[0004] To achieve the above objectives, this utility model proposes a time-delay power supply circuit, which includes: a power delay module and a first switching device;

[0005] The first end of the power delay module is connected to the first end of the first switching device, the second end of the first switching device is connected to the power supply device, and the second end of the power delay module is connected to the load.

[0006] The power delay module is used to receive the power voltage output by the power supply device for energy storage when the first switching device is closed.

[0007] The power delay module is also used to connect the load to the power supply device when the energy storage voltage reaches a preset voltage threshold, so that the power supply device can drive the load.

[0008] The power delay module is also used to drive the load by releasing the stored energy voltage when the first switching device is turned off;

[0009] The power delay module is also used to disconnect the load when the released energy storage voltage is lower than the preset voltage threshold.

[0010] In one embodiment, the delay power supply circuit further includes: a second switching device;

[0011] The first terminal of the second switching device is connected to the second terminal of the power delay module, and the second terminal of the second switching device is connected to the load.

[0012] The second switching device is used to connect the load to the power delay module when closed.

[0013] In one embodiment, the power delay module includes: a delay unit, a discharge unit, and a switching unit;

[0014] The first end of the delay unit is connected to the first end of the discharge unit, the second end of the delay unit is connected to the control end of the switch unit, the input end of the switch unit is connected to the first end of the first switch device, the output end of the switch unit is connected to the load, and the second end of the discharge unit is connected to the first end of the first switch device.

[0015] The delay unit is used to receive the power supply voltage output by the power supply device for energy storage when both the first switching device and the second switching device are closed.

[0016] The delay unit is also used to output the energy storage voltage to the switching unit when the energy storage voltage reaches the preset voltage threshold, and control the switching unit to close.

[0017] The switching unit is used to connect the drive circuit between the load and the power supply device when closed, so that the power supply device drives the load through the drive circuit.

[0018] In one embodiment, the delay unit is further configured to connect to the discharge unit when the first switching device is disconnected, and release the stored energy voltage through the discharge unit;

[0019] The switching unit is further configured to disconnect the drive circuit between the load and the power supply device when the received energy storage voltage is lower than the preset voltage threshold.

[0020] In one embodiment, the delay unit includes: an energy storage capacitor and a first resistor;

[0021] The first end of the energy storage capacitor is connected to the first end of the discharge unit and the first end of the first resistor, the second end of the first resistor is connected to the control end of the switching unit, and the second end of the energy storage capacitor is grounded.

[0022] In one embodiment, the delay unit further includes a potentiometer;

[0023] The control terminal of the potentiometer is connected to the first terminal of the first switching device, and the output terminal of the potentiometer is connected to the first terminal of the energy storage capacitor.

[0024] In one embodiment, the discharge unit includes: a first diode, a second resistor, and a third resistor;

[0025] The anode of the first diode is connected to the first terminal of the energy storage capacitor, the cathode of the first diode is connected to the first terminal of the second resistor and the first terminal of the third resistor, and the second terminal of the second resistor and the second terminal of the third resistor are both connected to the first terminal of the first switching device.

[0026] In one embodiment, the switching unit includes: a first switching transistor and a second switching transistor;

[0027] The control terminal of the first switching transistor is connected to the second terminal of the first resistor, the output terminal of the first switching transistor is connected to the first terminal of the first switching device, the input terminal of the first switching transistor is connected to the control terminal of the second switching transistor, the output terminal of the second switching transistor is connected to the first terminal of the first switching device, and the input terminal of the second switching transistor is connected to the first terminal of the second switching device.

[0028] In one embodiment, the delay power supply circuit further includes: a fourth resistor, a fifth resistor, a first indicator light, and a second indicator light;

[0029] The first end of the fourth resistor is connected to the first end of the first switching device, the second end of the fourth resistor is connected to the anode of the first indicator light, and the cathode of the first indicator light is grounded.

[0030] The fifth resistor is connected to the input terminal of the second switching transistor, the second terminal of the fifth resistor is connected to the anode of the second indicator light, and the cathode of the second indicator light is grounded.

[0031] In addition, to achieve the above objectives, this utility model also proposes a delay device, which includes the delay power supply circuit described above, and the delay device is connected to the power supply equipment and the load respectively.

[0032] One or more technical solutions proposed in this utility model have at least the following technical effects:

[0033] The time-delay power supply circuit disclosed in this utility model includes: a power delay module and a first switching device; a first terminal of the power delay module is connected to a first terminal of the first switching device, a second terminal of the first switching device is connected to a power supply device, and a second terminal of the power delay module is connected to a load. When the first switching device is closed, the power delay module receives the power voltage output from the power supply device and stores energy; when the stored energy voltage reaches a preset voltage threshold, the load is connected to the power supply device so that the power supply device drives the load; when the first switching device is open, the stored energy voltage is released to drive the load; when the released stored energy voltage is lower than the preset voltage threshold, the load is disconnected. This invention incorporates a power delay module between the power supply and the load. By storing energy in the power delay module, the load is powered on with a delay, reducing the peak surge current and minimizing the impact on the power supply. When the connection between the load and the power supply is broken, the power delay module briefly drives the load through discharge, allowing the load to gradually stop working and preventing load current from flowing back into the power supply. Therefore, this invention, through the energy storage and discharge of the power delay module, effectively prevents damage to the power supply in hot-plugging scenarios. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the first embodiment of the delay power supply circuit of this utility model;

[0037] Figure 2 This is a schematic diagram of the second embodiment of the delay power supply circuit of this utility model;

[0038] Figure 3 This is a schematic diagram of the third embodiment of the delay power supply circuit of this utility model;

[0039] Figure 4 This is a circuit diagram of the third embodiment of the time-delay power supply circuit of this utility model.

[0040] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this utility model and are not intended to limit this utility model.

[0042] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0043] This utility model embodiment provides a time-delay power supply circuit, referencing... Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the delay power supply circuit of this utility model.

[0044] In this embodiment, the delay power supply circuit includes: a power delay module 100 and a first switching device S1.

[0045] The first end of the power delay module 100 is connected to the first end of the first switching device S1, the second end of the first switching device S1 is connected to the power supply device 200, and the second end of the power delay module 100 is connected to the load 300.

[0046] It should be noted that the power delay module 100 can be connected to the first terminal of the first switching device S1 through its internal first socket, and the power supply device 200 can be connected to the second terminal of the first switching device S1 through its internal power socket. When the load 300 is connected to the power delay module 100, the two can be connected through a socket, that is, the power delay module 100 can be connected to the load socket inside the load 300 through its internal second socket.

[0047] It should be noted that the aforementioned power delay module 100 may be a module with energy storage function.

[0048] It is understood that the aforementioned power supply device 200 may be a device that drives the load 300 or powers the load 300.

[0049] The power delay module 100 is used to receive the power voltage output by the power supply device 200 for energy storage when the first switching device S1 is closed.

[0050] In a specific implementation, the on / off state of the first switching device S1 can be controlled by a relevant control chip or manually controlled by the user. The power delay module 100 can be connected to the power supply device 200 when the first switching device S1 is closed, receiving the power voltage input from the power supply device 200 for energy storage.

[0051] The power delay module 100 is also used to connect the load 300 to the power supply device 200 when the energy storage voltage reaches a preset voltage threshold, so that the power supply device 200 drives the load 300.

[0052] It should be noted that the power delay module 100 may also have a switching function to control the on / off state between the power supply device 200 and the load 300. The preset voltage threshold may be a pre-set threshold used to trigger the power delay module 100 to conduct the circuit between the power supply device 200 and the load 300.

[0053] In its implementation, during energy storage, the power delay module 100, when the stored energy voltage reaches a preset voltage threshold, can connect the circuit between the power supply device 200 and the load 300, thus connecting the load 300 to the power supply device 200. After the power supply device 200 connects to the load 300, it can output power voltage to the load 300, driving the load 300 and powering it on. Based on the energy storage of the power delay module 100, delayed power-on of the load 300 can be achieved.

[0054] The power delay module 100 is also used to drive the load 300 by releasing the stored energy storage voltage when the first switching device S1 is turned off.

[0055] The power delay module 100 is also used to disconnect the load 300 when the energy storage voltage after release is lower than a preset voltage threshold.

[0056] In a specific implementation, after the first switching device S1 is turned off, i.e., the power supply device 200 stops supplying power to the load 300, the aforementioned power delay module 100 can discharge through the load 300, releasing the stored energy voltage, and driving the load 300 based on the remaining stored energy voltage. After the stored energy voltage drops below a preset voltage threshold after being released, the circuit between the power supply device 200 and the load 300 is disconnected, causing the load 300 to be powered down. Based on the discharge of the power delay module 100, the delayed power-down of the load 300 can be achieved.

[0057] Alternatively, the first switching device S1 can be omitted, and the user can manually insert or unplug the power delay module 100 into the power supply device 200, and manually insert or unplug the load 300 into the power delay module 100 to achieve power-on delay and power-off delay.

[0058] The time-delay power supply circuit of this embodiment includes a power delay module and a first switching device. The first terminal of the power delay module is connected to the first terminal of the first switching device, the second terminal of the first switching device is connected to a power supply device, and the second terminal of the power delay module is connected to a load. In this embodiment, when the first switching device is closed, the power delay module receives the power voltage output by the power supply device and stores it. When the stored voltage reaches a preset voltage threshold, the load is connected to the power supply device so that the power supply device drives the load. When the first switching device is open, the stored voltage is released to drive the load. When the released stored voltage is lower than the preset voltage threshold, the load is disconnected. This embodiment sets up a power delay module between the power supply device and the load. The energy storage of the power delay module enables delayed power-on of the load, which can reduce the peak surge current and reduce the impact on the power supply device. When the connection between the load and the power supply device is disconnected, the power delay module briefly drives the load by discharging, allowing the load to slowly stop working and preventing the load current from flowing back to the power supply device. Therefore, this embodiment, through the energy storage and discharging of the power delay module, can effectively avoid damage to the power supply device in hot-plugging scenarios.

[0059] Based on the first embodiment of this utility model, a second embodiment of this utility model is proposed. In the second embodiment of this utility model, the content that is the same as or similar to that in the first embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a schematic diagram of the second embodiment of the delay power supply circuit of this utility model.

[0060] In this embodiment, the delay power supply circuit further includes a second switching device S2.

[0061] The first end of the second switching device S2 is connected to the second end of the power delay module 100, and the second end of the second switching device S2 is connected to the load 300.

[0062] The second switching device S2 is used to connect the load 300 to the power delay module 100 when closed.

[0063] It should be noted that the first end of the second switching device S2 can be connected to the second socket inside the power delay module 100, and the second end of the second switching device S2 can be connected to the load 300 socket of the load 300. The connection state between the power delay module 100 and the load 300 can be controlled by switching the second switching device S2 on and off.

[0064] In the specific implementation, when load 300 is powered on, the second switching device S2 is first closed to connect load 300 to the power delay module 100. Then, the first switching device S1 is closed to connect the power delay module 100 to the power supply device 200. The energy stored in the power delay module 100 enables delayed driving of load 300. When load 300 is powered off, the second switching device S2 can be directly closed to disconnect load 300 from the power delay module 100, thereby achieving zero-delay power-off of load 300. This process corresponds to the power-on delay-only mode.

[0065] When load 300 is powered on, the first switching device S1 is first closed to connect the power delay module 100 to the power supply device 200. The power delay module 100 stores energy. After the power delay module 100 has completed energy storage, the second switching device S2 is closed to connect load 300 to the power delay module 100. At this time, the power delay module 100 has completed energy storage, and after connecting load 300, load 300 can be directly connected to the power supply device 200, achieving power-on of load 300 without delay. When load 300 is powered off, the second switching device S2 can be directly closed to disconnect load 300 from the power delay module 100, thereby achieving power-off of load 300 without delay. This process corresponds to the power-off delay-only mode.

[0066] When load 300 is powered on, the second switching device S2 is first closed to connect load 300 to the power delay module 100. Then, the first switching device S1 is closed to connect the power delay module 100 to the power supply device 200. The energy stored in the power delay module 100 enables delayed driving of load 300. When load 300 is powered off, the second switching device S2 can be directly closed to disconnect load 300 from the power delay module 100, thus achieving a delay-free power-off of load 300. This process corresponds to the power-off delay-only mode. This process also corresponds to the power-on and power-off delay mode.

[0067] Alternatively, the first switching device S1 and the second switching device S2 can be omitted, allowing the user to manually insert or unplug the power delay module 100 into the power supply device 200, and manually insert or unplug the load 300 into the power delay module 100 to achieve different delay modes.

[0068] It should be understood that by setting a second switching device S2 between the power delay module 100 and the load 300, and by controlling the on / off sequence of the first switching device S1 and the second switching device S2, different delay modes can be switched, effectively improving the flexibility of the delay.

[0069] Based on the first and second embodiments of this utility model, a third embodiment of this utility model is proposed. In this third embodiment, content that is the same as or similar to the first and second embodiments described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to... Figure 3 , Figure 3 This is a schematic diagram of the third embodiment of the delay power supply circuit of this utility model.

[0070] In this embodiment, the power delay module 100 includes a delay unit 103 and a switching unit 104.

[0071] The first end of the delay unit 103 is connected to the first end of the discharge unit 105, the second end of the delay unit 103 is connected to the control end of the switch unit 104, the input end of the switch unit 104 is connected to the first end of the first switch device S1, the output end of the switch unit 104 is connected to the load 300, and the second end of the discharge unit 105 is connected to the first end of the first switch device S1.

[0072] It should be noted that the aforementioned delay unit 103 can be a unit used for energy storage.

[0073] It is understood that the aforementioned switching unit 104 may be a unit for controlling the connection state between the load 300 and the power supply device 200.

[0074] It should be noted that the above-mentioned discharge unit 105 can be a unit that discharges the delay unit 103.

[0075] The delay unit 103 is used to receive the power supply voltage output by the power supply device 200 for energy storage when both the first switching device S1 and the second switching device S2 are closed.

[0076] Reference Figure 4 , Figure 4 This is a circuit diagram of the third embodiment of the time-delay power supply circuit of this utility model. Figure 4 In the process, the delay unit includes: an energy storage capacitor C1, a first resistor R1, and a potentiometer Rp;

[0077] The first end of the energy storage capacitor C1 is connected to the first end of the discharge unit 105 and the first end of the first resistor R1. The second end of the first resistor R1 is connected to the control end of the switch unit 104. The second end of the energy storage capacitor C1 is grounded. The control end of the potentiometer Rp is connected to the first end of the first switch device S1. The output end of the potentiometer Rp is connected to the first end of the energy storage capacitor C1.

[0078] It should be noted that the power delay module 100 also includes a first connector J1, which can be used as a first socket to the power supply device 200. The power supply terminal VBUS of the first connector J1 is connected to the power supply device 200.

[0079] Understandably, the control terminal of the potentiometer Rp can be connected to the power supply terminal VBUS of the first connector J1 to access the first terminal of the first switching device S1. The potentiometer Rp can be an adjustable resistor, which can be manually controlled by the user or controlled by a corresponding control chip through the first connector J1.

[0080] Among them, the ground pin GND of the first connector J1 and the first pin 1 of the second connector P1 are both grounded.

[0081] In addition, the first signal pin DP1 and the second signal pin DP2 of the first connector J1 are both connected to the second pin 2 of the second connector P1, and the third signal pin DN3 and the fourth signal pin DN4 of the first connector J1 are both connected to the third pin 3 of the second connector P1, so that when the load 300 is connected, it can communicate with the power supply device 200 or other devices connected to the first connector J1 through the second connector P1.

[0082] In its specific implementation, when the first switching device S1 is closed, the power supply device 200 is connected to the control terminal of the potentiometer Rp through the first connector J1. The circuit formed by the power supply device 200, the potentiometer Rp, and the energy storage capacitor C1 is turned on, and the power supply device 200 outputs power voltage to the energy storage capacitor C1 to store energy. By adjusting the resistance value of the potentiometer Rp, the time constant between the energy storage capacitor C1 and the potentiometer Rp can be adjusted in a personalized manner, thereby realizing the adjustment of the power-on delay parameter.

[0083] The delay unit 103 is also used to output the energy storage voltage to the switching unit 104 when the energy storage voltage reaches the preset voltage threshold, and control the switching unit 104 to close.

[0084] The switching unit 104 is used to connect the drive circuit between the load 300 and the power supply device 200 when closed, so that the power supply device 200 drives the load 300 through the drive circuit.

[0085] like Figure 4 As shown, the switching unit 104 includes a first switching transistor Q1 and a second switching transistor Q2.

[0086] The control terminal of the first switch Q1 is connected to the second terminal of the first resistor R1, the output terminal of the first switch Q1 is connected to the first terminal of the first switching device S1, the input terminal of the first switch Q1 is connected to the control terminal of the second switch Q2, the output terminal of the second switch Q2 is connected to the first terminal of the first switching device S1, and the input terminal of the second switch Q2 is connected to the first terminal of the second switching device S2.

[0087] It should be noted that, Figure 4 The first switch Q1 and the second switch Q2 shown are PMOS transistors, but this does not limit the design. In practical applications, transistors or IGBTs can also be used.

[0088] It is understandable that the aforementioned preset voltage threshold can be the turn-on voltage that triggers the first switch Q1 to close.

[0089] Understandably, the aforementioned power delay module 100 also includes a second connector P1, which can serve as a second socket for connection to the load 300. Figure 4 The second switching device S1 shown is located between the second connector P1 and the second switching tube Q2, but this does not limit the solution. In actual scenarios, the second switching device S2 can also be located between the load 300 and the second connector P1.

[0090] In the specific implementation, Figure 4 To illustrate, the first terminal of the second switching device S2 is connected to the input terminal of the second switching transistor Q2, and the second terminal of the second switching device S2 is connected to the fourth terminal 4 of the second connector P1. The second connector P1 can be used as a 4-pin socket, and the load 300 can be connected to the second connector P1 through a corresponding interface (such as a Type C interface). When the second switching device S2 is closed and the energy storage voltage of the energy storage capacitor C1 reaches a preset voltage threshold, the first switching transistor Q1 closes, connecting the power supply device 200 to the control terminal of the second switching transistor Q2, causing the power supply device 200 to output power voltage to the control terminal of the second switching transistor Q2. The second switching transistor Q2 then closes, connecting the load 300 to the power supply device 200, thus establishing a drive circuit between the load 300 and the power supply device 200. This allows the power supply device 200 to drive the load 300 through the drive circuit, achieving delayed power-on.

[0091] It should be understood that by driving the second switch Q2 through the first switch Q1, the surge current of the second switch Q2 at the moment of turn-on can be effectively eliminated.

[0092] The delay unit 103 is also used to connect to the discharge unit 105 when the first switching device S1 is turned off, and release the stored energy voltage through the discharge unit 105.

[0093] The switching unit 104 is further configured to disconnect the drive circuit between the load 300 and the power supply device 200 when the received energy storage voltage is lower than the preset voltage threshold.

[0094] like Figure 4 As shown, the discharge unit 105 includes: a first diode D1, a second resistor R2, and a third resistor R3.

[0095] The anode of the first diode D1 is connected to the first terminal of the energy storage capacitor C1, and the cathode of the first diode D1 is connected to the first terminal of the second resistor R2 and the first terminal of the third resistor R3. The second terminals of the second resistor R2 and the second terminals of the third resistor R3 are both connected to the first terminal of the first switching device S1.

[0096] In the specific implementation, when power is required and the first switching device S1 is disconnected, the drive circuit between the power supply device 200 and the load 300 is disconnected, and the power supply device 200 stops driving the load 300. At this time, the energy storage capacitor C1 can discharge through the discharge circuit formed by the second resistor R2, the third resistor R3, and the first diode D1, that is, release the stored energy voltage. At this time, the energy storage capacitor C1 can continue to provide energy storage voltage to the control terminal of the first switching transistor Q1, maintaining the first switching transistor Q1 closed. The energy storage voltage released by the energy storage capacitor C1 can then flow into the second switching transistor Q2 through the discharge circuit, maintaining the second switching transistor Q2 closed. When both the first switching transistor Q1 and the second switching transistor Q2 are closed, the load 300 is connected to the energy storage capacitor C1, and the load 300 is driven by the energy storage capacitor C1. When the energy storage voltage released by the energy storage capacitor C1 is lower than the preset voltage threshold, that is, when the energy storage voltage of the first switch Q1 at the control terminal is lower than the preset voltage threshold, it is turned off, causing the second switch Q2 to turn off, thereby disconnecting the circuit between the energy storage capacitor C1 and the load 300, stopping the drive of the load 300, and realizing delayed power-off.

[0097] In this embodiment, refer to Figure 4 The delay power supply circuit further includes: a fourth resistor R4, a fifth resistor R5, a first indicator light L1, and a second indicator light L2.

[0098] The first end of the fourth resistor R4 is connected to the first end of the first switching device S1, the second end of the fourth resistor R4 is connected to the anode of the first indicator light L1, and the cathode of the first indicator light L1 is grounded; the fifth resistor R5 is connected to the input terminal of the second switching transistor Q2, the second end of the fifth resistor R5 is connected to the anode of the second indicator light L2, and the cathode of the second indicator light L2 is grounded.

[0099] In the specific implementation, the first indicator light L1 serves as the input power indicator, indicating that the power supply device 200 is connected to the power delay module 100, and the fourth resistor R4 is used to limit the current flowing into the first indicator light L1; the second indicator light L2 serves as the output power indicator, indicating that the load 300 is connected to the power delay module 100, and the fifth resistor R5 is used to limit the current flowing into the second indicator light L2. The operating status of the power supply device 200 can be displayed through the first indicator light L1 and the second indicator light L2, and the delay duration of the power delay module 100 can be monitored based on the duration of the lights.

[0100] It should be noted that the above examples are only for understanding this utility model and do not constitute a limitation on the delay power supply circuit of this utility model. Any simple modifications based on this technical concept are within the protection scope of this utility model.

[0101] This utility model also provides a delay device, which includes the delay power supply circuit described above, and the delay device is connected to the power supply equipment and the load respectively.

[0102] The delay device provided by this utility model, employing the delay power supply circuit in the above embodiments, can solve the technical problem that the power supply equipment is damaged in hot-plugging scenarios in the prior art. Compared with the prior art, the beneficial effects of the delay device provided by this utility model are the same as those of the delay power supply circuit provided in the above embodiments, and other technical features in the delay device are the same as those disclosed in the above delay power supply circuit embodiments, and will not be repeated here.

[0103] The above description is only a part of the embodiments of this utility model and does not limit the patent scope of this utility model. All equivalent structural transformations made under the technical concept of this utility model using the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this utility model.

Claims

1. A time delay power supply circuit, characterized by comprising: The time-delay power supply circuit includes: a power delay module and a first switching device; The first terminal of the power delay module is connected to the first terminal of the first switching device, the second terminal of the first switching device is connected to the power supply device, and the second terminal of the power delay module is connected to the load. The power delay module is used to receive the power voltage output by the power supply device for energy storage when the first switching device is closed. The power delay module is also used to connect the load to the power supply device when the energy storage voltage reaches a preset voltage threshold, so that the power supply device can drive the load. The power delay module is also used to drive the load by releasing the stored energy voltage when the first switching device is turned off; The power delay module is also used to disconnect the load when the released energy storage voltage is lower than the preset voltage threshold.

2. The delay power supply circuit of claim 1, wherein, The time-delay power supply circuit further includes: a second switching device; The first terminal of the second switching device is connected to the second terminal of the power delay module, and the second terminal of the second switching device is connected to the load. The second switching device is used to connect the load to the power delay module when closed.

3. The delay power supply circuit of claim 2, wherein, The power delay module includes: a delay unit, a discharge unit, and a switching unit; The first end of the delay unit is connected to the first end of the discharge unit, the second end of the delay unit is connected to the control end of the switch unit, the input end of the switch unit is connected to the first end of the first switch device, the output end of the switch unit is connected to the load, and the second end of the discharge unit is connected to the first end of the first switch device. The delay unit is used to receive the power supply voltage output by the power supply device for energy storage when both the first switching device and the second switching device are closed. The delay unit is also used to output the energy storage voltage to the switching unit when the energy storage voltage reaches the preset voltage threshold, and control the switching unit to close. The switching unit is used to connect the drive circuit between the load and the power supply device when closed, so that the power supply device drives the load through the drive circuit.

4. The delay power supply circuit of claim 3, wherein, The delay unit is also used to connect to the discharge unit when the first switching device is turned off, and to release the stored energy voltage through the discharge unit; The switching unit is further configured to disconnect the drive circuit between the load and the power supply device when the received energy storage voltage is lower than the preset voltage threshold.

5. The delay power supply circuit of claim 4, wherein, The delay unit includes: an energy storage capacitor and a first resistor; The first end of the energy storage capacitor is connected to the first end of the discharge unit and the first end of the first resistor, the second end of the first resistor is connected to the control end of the switching unit, and the second end of the energy storage capacitor is grounded.

6. The delay power supply circuit as described in claim 5, characterized in that, The delay unit further includes: a potentiometer; The control terminal of the potentiometer is connected to the first terminal of the first switching device, and the output terminal of the potentiometer is connected to the first terminal of the energy storage capacitor.

7. The delay power supply circuit of claim 6, wherein, The discharge unit includes: a first diode, a second resistor, and a third resistor; The anode of the first diode is connected to the first terminal of the energy storage capacitor, the cathode of the first diode is connected to the first terminal of the second resistor and the first terminal of the third resistor, and the second terminal of the second resistor and the second terminal of the third resistor are both connected to the first terminal of the first switching device.

8. The time-delay power supply circuit as described in claim 7, characterized in that, The switching unit includes: a first switching transistor and a second switching transistor; The control terminal of the first switching transistor is connected to the second terminal of the first resistor, the output terminal of the first switching transistor is connected to the first terminal of the first switching device, the input terminal of the first switching transistor is connected to the control terminal of the second switching transistor, the output terminal of the second switching transistor is connected to the first terminal of the first switching device, and the input terminal of the second switching transistor is connected to the first terminal of the second switching device.

9. The delay power supply circuit as described in claim 8, characterized in that, The delay power supply circuit also includes: a fourth resistor, a fifth resistor, a first indicator light, and a second indicator light; The first end of the fourth resistor is connected to the first end of the first switching device, the second end of the fourth resistor is connected to the anode of the first indicator light, and the cathode of the first indicator light is grounded. The fifth resistor is connected to the input terminal of the second switching transistor, the second terminal of the fifth resistor is connected to the anode of the second indicator light, and the cathode of the second indicator light is grounded.

10. A time delay device characterized by, The delay device includes the delay power supply circuit according to any one of claims 1 to 9, and the delay device is connected to the power supply device and the load respectively.

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