Phantom power supply circuit and electronic equipment

Abstract

The embodiment of the utility model provides a phantom power supply circuit and electronic equipment, the phantom power supply circuit is applied to the electronic equipment, and the phantom power supply circuit comprises an alternating current power supply port, a booster circuit and a voltage stabilizing circuit; the alternating-current power supply port comprises an alternating-current power supply positive port and an alternating-current power supply negative port, the alternating-current power supply positive port and the alternating-current power supply negative port are respectively connected with the boosting circuit, and the boosting circuit is used for converting alternating-current voltage corresponding to the alternating-current power supply port into target voltage; the voltage stabilizing circuit comprises a voltage regulating circuit, a voltage stabilizing diode and a current regulating circuit, the booster circuit is connected with the voltage regulating circuit, the voltage regulating circuit is respectively connected with the voltage stabilizing diode and the current regulating circuit, and the voltage stabilizing diode is connected with the current regulating circuit; wherein the voltage regulating circuit is used for outputting a first current to the voltage stabilizing diode, so that the voltage stabilizing diode outputs a first voltage; and the current adjusting circuit is used for determining the target current according to the first voltage and outputting the target current and the target voltage, so that the installation efficiency of the equipment is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of circuits, and in particular, to a phantom power supply circuit and an electronic device. Background Art

[0002] Phantom power can be a DC power supply method. Phantom power can be used to supply power to devices that require power without additional power cords, that is, phantom power can transmit signals and DC voltages to corresponding devices simultaneously.

[0003] Phantom power can be applied in the audio field to power audio devices, which can include condenser microphones, headphones, etc. Currently, phantom power is provided by independent devices. When installing audio devices, a phantom power device needs to be configured, and a power cord with a shielding function also needs to be configured for the phantom power device.

[0004] In the above process, it is necessary to configure a phantom power device and the corresponding power cord, resulting in low installation efficiency of the device. Summary of the Utility Model

[0005] The embodiments of the present application provide a phantom power supply circuit and an electronic device to solve the defect in the prior art that a phantom power supply device and the corresponding power cord need to be configured, resulting in low installation efficiency of the device.

[0006] In a first aspect, the embodiments of the present application provide a phantom power supply circuit applied to an electronic device. The phantom power supply circuit includes: an AC power supply port, a boosting circuit, and a voltage stabilizing circuit;

[0007] The AC power supply port includes a positive AC power supply port and a negative AC power supply port. The positive AC power supply port and the negative AC power supply port are respectively connected to the boosting circuit, and the boosting circuit is used to convert the AC voltage corresponding to the AC power supply port into a target voltage;

[0008] The voltage stabilizing circuit includes a voltage regulating circuit, a voltage stabilizing diode, and a current regulating circuit. The boosting circuit is connected to the voltage regulating circuit, the voltage regulating circuit is respectively connected to the voltage stabilizing diode and the current regulating circuit, and the voltage stabilizing diode is connected to the current regulating circuit;

[0009] Wherein, the voltage regulating circuit is used to output a first current to the voltage stabilizing diode so that the voltage stabilizing diode outputs a first voltage. The current value corresponding to the first current is within a first preset range, the voltage value corresponding to the first voltage is within a second preset range, and the first voltage is less than the target voltage;

[0010] The flow regulation circuit is configured to determine a target current based on the first voltage, and output the target current and the target voltage, where the target current is greater than the first current.

[0011] In a possible design, the voltage regulation circuit includes a first triode, a first resistor, a second triode, a second resistor, and a first capacitor, where

[0012] A first end of the voltage boosting circuit is respectively connected to an emitter of the first triode and a first end of the first resistor. A base of the first triode is connected to a second end of the first resistor. A collector of the first triode is connected to a first end of the second resistor;

[0013] The second end of the first resistor is connected to an emitter of the second triode. A base of the second triode is connected to the first end of the second resistor. A collector of the second triode is connected to a first end of the first capacitor;

[0014] A second end of the voltage boosting circuit is sequentially connected to a second end of the second resistor and a second end of the first capacitor.

[0015] In a possible design, the first end of the first capacitor is connected to a negative electrode of the zener diode;

[0016] The second end of the first capacitor is connected to a positive electrode of the zener diode.

[0017] In a possible design, the flow regulation circuit includes a third resistor, a third triode, a fourth triode, and a fourth resistor, where

[0018] The negative electrode of the zener diode is connected to a first end of the third resistor;

[0019] The second end of the third resistor is connected to a base of the third triode. An emitter of the third triode is connected to a first end of the fourth resistor. A collector of the third triode is connected to a first end of the voltage boosting circuit;

[0020] The base of the fourth triode is connected to the first end of the fourth resistor. The collector of the fourth triode is connected to the first end of the voltage boosting circuit. The emitter of the fourth triode is connected to a second end of the fourth resistor.

[0021] In a possible design, the phantom power circuit further includes a protection circuit, and the protection circuit is configured to protect the third triode and the fourth triode.

[0022] In a possible design, the protection circuit includes a first diode and a second diode, where

[0023] The positive electrode of the first diode is connected to the emitter of the fourth triode;

[0024] The negative electrode of the first diode is connected to the first end of the boosting circuit;

[0025] The positive electrode of the second diode is connected to the first end of the third resistor;

[0026] The negative electrode of the second diode is connected to the first end of the boosting circuit.

[0027] In a possible design, the boosting circuit includes a second capacitor, a third capacitor, a third diode, and a fourth diode, where,

[0028] The positive terminal port of the AC power supply is connected to the positive electrode of the third diode, the negative electrode of the third diode is connected to the first end of the second capacitor, and the second end of the second capacitor is connected to the negative terminal port of the AC power supply;

[0029] The negative terminal port of the AC power supply is also connected to the first end of the third capacitor, the second end of the third capacitor is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected to the positive terminal port of the AC power supply.

[0030] In a possible design, the voltage value of the target voltage is the sum of the voltage value corresponding to the second capacitor and the voltage value corresponding to the third capacitor.

[0031] In a possible design, the phantom power supply circuit further includes a fourth capacitor, where,

[0032] The first end of the fourth capacitor is connected to the ground wire, the first end of the fourth capacitor is also connected to the second end of the boosting circuit, and the second end of the fourth capacitor is connected to the first end of the boosting circuit.

[0033] In a second aspect, an embodiment of the present application provides an electronic device, including the phantom power supply circuit as described in the first aspect.

[0034] An embodiment of the present application provides an phantom power supply circuit and an electronic device. By applying the phantom power supply circuit to the electronic device, the phantom power supply circuit includes: an AC power supply port, a boosting circuit, and a voltage stabilizing circuit; the AC power supply port includes an AC power supply positive terminal port and an AC power supply negative terminal port, and the AC power supply positive terminal port and the AC power supply negative terminal port are respectively connected to the boosting circuit, and the boosting circuit is used to convert the AC voltage corresponding to the AC power supply port into a target voltage; the voltage stabilizing circuit includes a voltage regulating circuit, a voltage stabilizing diode, and a current regulating circuit, the boosting circuit is connected to the voltage regulating circuit, the voltage regulating circuit is respectively connected to the voltage stabilizing diode and the current regulating circuit, and the voltage stabilizing diode is connected to the current regulating circuit; wherein, the voltage regulating circuit is used to output a first current to the voltage stabilizing diode so that the voltage stabilizing diode outputs a first voltage, the current value corresponding to the first current is within a first preset range, the voltage value corresponding to the first voltage is within a second preset range, and the first voltage is less than the target voltage; the current regulating circuit is used to determine a target current according to the first voltage, and output the target current and the target voltage, and the target current is greater than the first current. In this way, by setting the phantom power supply circuit in the electronic device, there is no need to additionally configure an independent phantom power supply device and the corresponding power cord, which improves the installation efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 FIG. is a schematic structural diagram of an phantom power supply device provided by an embodiment of the present application;

[0037] Figure 2 FIG. is a schematic structural diagram of an phantom power supply circuit provided by an embodiment of the present application;

[0038] Figure 3 FIG. is a schematic structural diagram of a voltage regulating circuit provided by an embodiment of the present application;

[0039] Figure 4 FIG. is a schematic diagram of the current flow direction of a voltage regulating circuit provided by an embodiment of the present application;

[0040] Figure 5 FIG. is a schematic structural diagram of a current regulating circuit provided by an embodiment of the present application;

[0041] Figure 6 FIG. is a schematic structural diagram of a boosting circuit provided by an embodiment of the present application;

[0042] Figure 7 FIG. is a schematic structural diagram of another phantom power supply circuit provided by an embodiment of the present application;

[0043] Figure 8 This is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

[0044] Reference numerals:

[0045] 101 - AC power supply port; 102 - Boosting circuit; 103 - Voltage stabilizing circuit; 104 - Fourth capacitor; 1031 - Voltage regulating circuit; 1032 - Zener diode; 1033 - Current regulating circuit; 201 - First triode; 202 - First resistor; 203 - Second triode; 204 - Second resistor; 205 - First capacitor; 301 - Third resistor; 302 - Third triode; 303 - Fourth triode; 304 - Fourth resistor; 401 - Second capacitor; 402 - Third capacitor; 403 - Third diode; 404 - Fourth diode; 501 - Protection circuit; 5011 - First diode; 5012 - Second diode. Detailed implementation manners

[0046] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0048] In the present application, the term "including" and its variants may refer to non - restrictive inclusion; the term "or" and its variants may refer to "and / or". In the present application, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. In the present application, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0049] Phantom power can be a DC power supply method. Phantom power can be used to supply power to devices that require power without the need for additional power cords, that is, phantom power can transmit both signals and DC voltage to the corresponding devices.

[0050] Phantom power can be applied in the audio field to power audio devices, which can include condenser microphones, headphones, etc. Currently, phantom power is provided by independent devices. When installing audio devices, a phantom power device needs to be configured, and a power cord with shielding function also needs to be configured for the phantom power device.

[0051] Next, in combination with Figure 1 , an explanation of the phantom power device will be given.

[0052] Figure 1 The following is a schematic structural diagram of a phantom power device provided by an embodiment of the present application. Please refer to Figure 1 , Figure 1 It may include a phantom power device. The phantom power device may include a power port, a transformer, a rectifier, and an output interface.

[0053] The power port can be used to connect to a power source.

[0054] The transformer can be used to convert the alternating current output by the power port into an alternating voltage corresponding to a target voltage value. For example, the target voltage value can be 48V.

[0055] The rectifier can be used to convert the alternating voltage output by the transformer into a direct current voltage.

[0056] The output interface generally uses a XLR connector or other suitable interfaces to connect to a condenser microphone or other devices that require phantom power.

[0057] In the related art, when installing audio devices, a generating device for phantom power and the corresponding power cord need to be configured, resulting in low installation efficiency of the devices.

[0058] To solve the above technical problems, an embodiment of the present application provides a phantom power circuit. By setting a phantom power circuit in an electronic device, there is no need to additionally configure an independent phantom power device and the corresponding power cord, improving the installation efficiency of the device.

[0059] Next, specific embodiments will be used to elaborate in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0060] Figure 2The figure is a schematic structural diagram of a phantom power supply circuit provided by an embodiment of the present application. Please refer to Figure 2 , Figure 2 It may include a phantom power supply circuit. The phantom power supply circuit is applied to an electronic device and includes: an AC power supply port 101, a boosting circuit 102, and a voltage stabilizing circuit 103.

[0061] The AC power supply port 101 includes an AC power supply positive terminal port and an AC power supply negative terminal port. The AC power supply positive terminal port and the AC power supply negative terminal port are respectively connected to the boosting circuit 102. The boosting circuit 102 is used to convert the AC voltage corresponding to the AC power supply port 101 into a target voltage;

[0062] The voltage stabilizing circuit 103 includes a voltage regulating circuit 1031, a voltage stabilizing diode 1032, and a current regulating circuit 1033. The boosting circuit 102 is connected to the voltage regulating circuit 1031. The voltage regulating circuit 1031 is respectively connected to the voltage stabilizing diode 1032 and the current regulating circuit 1033. The voltage stabilizing diode 1032 is connected to the current regulating circuit 1033;

[0063] The voltage regulating circuit 1031 is used to output a first current to the voltage stabilizing diode 1032, so that the voltage stabilizing diode 1032 outputs a first voltage. The current value corresponding to the first current is within a first preset range, and the voltage value corresponding to the first voltage is within a second preset range. The first voltage is less than the target voltage;

[0064] The current regulating circuit 1033 is used to determine a target current according to the first voltage, and output the target current and the target voltage. The target current is greater than the first current.

[0065] Among them, the AC power supply port 101 can be used to connect to an AC power supply to obtain an AC voltage.

[0066] The AC power supply positive terminal port and the AC power supply negative terminal port are respectively connected to the boosting circuit 102, and can charge the capacitor in the boosting circuit 102. When the capacitor reaches a steady state, the target voltage is output through the capacitor in the boosting circuit 102. The target voltage can be a DC voltage.

[0067] Optionally, the voltage value corresponding to the target voltage can be n times the AC voltage value corresponding to the AC power supply port 101. n can be a positive integer and is not limited herein.

[0068] The voltage regulating circuit 1031 can be a circuit constructed using the characteristics of a triode, so that the output current remains constant, that is, the current value corresponding to the first current is within a first preset range and is not affected by factors such as changes in the load resistance.

[0069] The first current can be used to provide a stable current to the voltage regulator diode 1032, so that the voltage regulator diode 1032 outputs a stable voltage, avoiding the change of the reverse bias current of the voltage regulator diode 1032 caused by the change of the AC voltage or the change of the load current, resulting in the instability of the voltage of the voltage regulator diode 1032.

[0070] The current regulating circuit 1033 can be a circuit constructed by utilizing the characteristics of a triode, so that the current output to the load device increases.

[0071] In this embodiment, the phantom power supply circuit is applied to the electronic device. The phantom power supply circuit includes: an AC power supply port, a voltage boosting circuit, and a voltage stabilizing circuit; the AC power supply port includes an AC power supply positive terminal port and an AC power supply negative terminal port, and the AC power supply positive terminal port and the AC power supply negative terminal port are respectively connected to the voltage boosting circuit. The voltage boosting circuit is used to convert the AC voltage corresponding to the AC power supply port into a target voltage; the voltage stabilizing circuit includes a voltage regulating circuit, a voltage regulator diode, and a current regulating circuit. The voltage boosting circuit is connected to the voltage regulating circuit, the voltage regulating circuit is respectively connected to the voltage regulator diode and the current regulating circuit, and the voltage regulator diode is connected to the current regulating circuit; wherein, the voltage regulating circuit is used to output a first current to the voltage regulator diode, so that the voltage regulator diode outputs a first voltage. The current value corresponding to the first current is within a first preset range, the voltage value corresponding to the first voltage is within a second preset range, and the first voltage is less than the target voltage; the current regulating circuit is used to determine a target current according to the first voltage, and output the target current and the target voltage, and the target current is greater than the first current. In this way, by arranging the phantom power supply circuit in the electronic device, there is no need to additionally configure an independent phantom power supply device and the corresponding power cord, reducing the installation cost of the device and improving the installation efficiency of the device.

[0072] Next, on the basis of Figure 2 , combined with Figure 3 , the voltage regulating circuit 1031 will be further explained.

[0073] Exemplarily, Figure 3 is a schematic structural diagram of a voltage regulating circuit provided by an embodiment of the present application. Please refer to Figure 3 , Figure 3 It may include a voltage regulating circuit 1031, and the voltage regulating circuit 1031 may include a first triode 201, a first resistor 202, a second triode 203, a second resistor 204, and a first capacitor 205.

[0074] The first end of the voltage boosting circuit 102 is respectively connected to the emitter of the first triode 201 and the first end of the first resistor 202. The base of the first triode 201 is connected to the second end of the first resistor 202, and the collector of the first triode 201 is connected to the first end of the second resistor 204;

[0075] The second terminal of the first resistor 202 is connected to the emitter of the second triode 203. The base of the second triode 203 is connected to the first terminal of the second resistor 204. The collector of the second triode 203 is connected to the first terminal of the first capacitor 205.

[0076] The second terminal of the boosting circuit 102 is sequentially connected to the second terminal of the second resistor 204 and the second terminal of the first capacitor 205.

[0077] In a possible implementation, the first terminal of the first capacitor 205 is connected to the negative electrode of the voltage stabilizing diode 1032; the second terminal of the first capacitor 205 is connected to the positive electrode of the voltage stabilizing diode 1032.

[0078] Among them, when the first capacitor 205 reaches a steady state, it can supply power to the voltage stabilizing diode 1032. Since the first current corresponding to the first capacitor 205 is stable, the first voltage corresponding to the voltage stabilizing diode 1032 is also in a stable state, that is, the voltage value corresponding to the first voltage is within the second preset range.

[0079] Next, in combination with Figure 4 , the current flow direction in the voltage regulating circuit 1031 will be further explained.

[0080] Figure 4 This is a schematic diagram of the current flow direction of a voltage regulating circuit provided by an embodiment of the present application. Please refer to Figure 4 , Figure 4 It may include the voltage regulating circuit 1031 and the current flow direction indicated by arrows.

[0081] The current flow direction is as follows: The current flowing from the first terminal of the first resistor 202 to the second terminal is set as I1. The current flowing from the first terminal of the boosting circuit 102 to the emitter of the first triode 201 is set as I2. The current flowing from the base of the first triode 201 to the second terminal of the first resistor 202 is set as I3. The current flowing from the second terminal of the first resistor 202 to the emitter of the second triode 203 is set as I4. The current flowing from the collector of the first triode 201 to the base of the second triode 203 is set as I5. The current flowing from the first terminal of the second resistor 204 to the second terminal is set as I6. The current flowing from the base of the second triode 203 to the second terminal of the first resistor 202 is set as I7. The current flowing from the first terminal of the first capacitor 205 to the second terminal is set as Iout.

[0082] Among them, due to the characteristics of the triode, the current values corresponding to I7 and I3 are relatively small and can be ignored. Iout≈I1≈I4.

[0083] When the load power in the subsequent circuit increases, the current value corresponding to Iout can be increased, which causes the current value corresponding to I1 to increase.

[0084] When the current value corresponding to I1 increases, the voltage drop corresponding to R1 can be increased correspondingly, which causes the conduction of the second triode 203 to be enhanced, that is, the current value corresponding to the second triode 203 increases.

[0085] When the conduction of the second triode 203 is enhanced, the current value corresponding to I5 can be increased, which causes the voltage drop corresponding to the second resistor 204 to increase.

[0086] When the voltage drop corresponding to the second resistor 204 increases, the voltage drop corresponding to R1 can be decreased, which causes the current value corresponding to I1 to decrease, and further causes Iout to decrease, so that the voltage regulating circuit reaches a dynamic balance.

[0087] In this embodiment, the voltage regulating circuit includes a first triode, a first resistor, a second triode, a second resistor and a first capacitor. Among them, the first end of the voltage boosting circuit is respectively connected to the emitter of the first triode and the first end of the first resistor. The base of the first triode is connected to the second end of the first resistor, and the collector of the first triode is connected to the first end of the second resistor; the second end of the first resistor is connected to the emitter of the second triode, the base of the second triode is connected to the first end of the second resistor, and the collector of the second triode is connected to the first end of the first capacitor; the second end of the voltage boosting circuit is sequentially connected to the second end of the second resistor and the second end of the first capacitor. In this way, by setting a phantom power supply circuit with a voltage regulating circuit in the electronic device, there is no need to additionally configure an independent phantom power supply device and the corresponding power cord, which reduces the installation cost of the device, improves the installation efficiency of the device, and ensures the stability of the phantom power supply.

[0088] Next, on the basis of Figure 2 , combined with Figure 5 , the current regulating circuit will be further explained.

[0089] Exemplarily, Figure 5 is a schematic structural diagram of a current regulating circuit provided by an embodiment of the present application. Please refer to Figure 5 , Figure 5 It may include a current regulating circuit 1033. The current regulating circuit 1033 may include a third resistor 301, a third triode 302, a fourth triode 303 and a fourth resistor 304. Among them,

[0090] The negative electrode of the voltage stabilizing diode 1032 is connected to the first end of the third resistor 301;

[0091] The second end of the third resistor 301 is connected to the base of the third triode 302. The emitter of the third triode 302 is connected to the first end of the fourth resistor 304, and the collector of the third triode 302 is connected to the first end of the voltage boosting circuit 102;

[0092] The base of the fourth triode 303 is connected to the first end of the fourth resistor 304, the collector of the fourth triode 303 is connected to the first end of the booster circuit 102, and the emitter of the fourth triode 303 is connected to the second end of the fourth resistor 304.

[0093] Among them, due to the characteristics of the triode, the emitter current is equal to the base current plus the collector current. In the amplification state, the collector current is approximately β times the base current, where β is the DC or AC current amplification factor.

[0094] Assume that the current value corresponding to the base of the third triode is a, the amplification factors corresponding to the third triode and the fourth triode are both β, the current value corresponding to the fourth resistor is b, the current corresponding to the emitter of the third triode 302 is: (1 + β) × a, the current corresponding to the base of the fourth triode 303 is: ((1 + β) × a) - b, and the current corresponding to the emitter of the fourth triode 303 is: (1 + β) × [((1 + β) × a) - b]. It can be determined that the target current is: (1 + β) × [((1 + β) × a) - b].

[0095] The third resistor 301 and the fourth resistor 304 can be used to adjust the magnitude of the target current.

[0096] In a possible implementation manner, the phantom power supply circuit further includes a protection circuit, and the protection circuit is used to protect the third triode and the fourth triode. The protection circuit may include a first diode and a second diode.

[0097] In this embodiment, the current adjustment circuit includes a third resistor, a third triode, a fourth triode, and a fourth resistor. Among them, the negative electrode of the zener diode is connected to the first end of the third resistor; the second end of the third resistor is connected to the base of the third triode, the emitter of the third triode is connected to the first end of the fourth resistor, and the collector of the third triode is connected to the first end of the booster circuit; the base of the fourth triode is connected to the first end of the fourth resistor, the collector of the fourth triode is connected to the first end of the booster circuit, and the emitter of the fourth triode is connected to the second end of the fourth resistor. In this way, by setting a phantom power supply circuit with a current adjustment circuit in the electronic device, there is no need to additionally configure an independent phantom power supply device and the corresponding power cord, reducing the installation cost of the device, improving the installation efficiency of the device, and ensuring the stability of the phantom power supply.

[0098] Next, on the basis of Figure 2 Combined with Figure 6 To further explain the booster circuit.

[0099] Exemplarily, Figure 6 FIG. Figure 6 is a schematic structural diagram of a booster circuit provided by an embodiment of the present application. Please refer to Figure 6It may include a boosting circuit 102, and the boosting circuit 102 may include a second capacitor 401, a third capacitor 402, a third diode 403, and a fourth diode 404. Among them,

[0100] The positive terminal of the AC power supply is connected to the positive electrode of the third diode 403, the negative electrode of the third diode 403 is connected to the first end of the second capacitor 401, and the second end of the second capacitor 401 is connected to the negative terminal of the AC power supply;

[0101] The negative terminal of the AC power supply is also connected to the first end of the third capacitor 402, the second end of the third capacitor 402 is connected to the positive electrode of the fourth diode 404, and the negative electrode of the fourth diode 404 is connected to the positive terminal of the AC power supply.

[0102] Among them, the positive voltage output from the positive terminal of the AC power supply passes through the third diode 403 to charge the second capacitor 401, and then is connected to the negative terminal of the AC power supply.

[0103] The negative voltage output from the negative terminal of the AC power supply charges the third capacitor 402, and then is connected to the positive terminal of the AC power supply through the fourth diode 404.

[0104] In a possible implementation manner, the voltage value of the target voltage is the sum of the voltage value corresponding to the second capacitor and the voltage value corresponding to the third capacitor.

[0105] In this embodiment, the boosting circuit includes a second capacitor, a third capacitor, a third diode, and a fourth diode. Among them, the positive terminal of the AC power supply is connected to the positive electrode of the third diode, the negative electrode of the third diode is connected to the first end of the second capacitor, and the second end of the second capacitor is connected to the negative terminal of the AC power supply; the negative terminal of the AC power supply is also connected to the first end of the third capacitor, the second end of the third capacitor is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected to the positive terminal of the AC power supply. In this way, by setting a phantom power supply circuit with a boosting circuit in the electronic device, there is no need to additionally configure an independent phantom power supply device and the corresponding power cord, which reduces the installation cost of the device, improves the installation efficiency of the device, and ensures the output of the target voltage corresponding to the phantom power supply.

[0106] Next, on the basis of Figures 2 - 6 , combined with Figure 7 , the phantom power supply circuit will be further explained.

[0107] Exemplarily, Figure 7 is a schematic structural diagram of another phantom power supply circuit provided by the embodiment of the present application. Please refer to Figure 7 , Figure 7It may include a phantom power supply circuit, which is applied to an electronic device. The phantom power supply circuit includes: an AC power supply port 101, a voltage boosting circuit 102, a voltage stabilizing circuit 103, a fourth capacitor 104, and a protection circuit 501.

[0108] Among them, the AC power supply port 101, the voltage boosting circuit 102, and the voltage stabilizing circuit 103 may refer to the above description and will not be elaborated here.

[0109] In a possible implementation, the phantom power supply circuit further includes a fourth capacitor 104. The first end of the fourth capacitor 104 is connected to the ground wire, and the first end of the fourth capacitor 104 is also connected to the second end of the voltage boosting circuit 102. The second end of the fourth capacitor is connected to the first end of the voltage boosting circuit 102.

[0110] The protection circuit 501 may include a first diode 5011 and a second diode 5012. The positive electrode of the first diode 5011 is connected to the emitter of the fourth triode 303; the negative electrode of the first diode 5011 is connected to the first end of the voltage boosting circuit 102; the positive electrode of the second diode 5012 is connected to the first end of the third resistor 301; the negative electrode of the second diode 5012 is connected to the first end of the voltage boosting circuit 102.

[0111] Among them, the first diode 5011 can be used to protect the fourth triode 303 from being voltage breakdown. The second diode 5012 can be used to protect the third triode 302 from being voltage breakdown.

[0112] In this embodiment, by setting a phantom power supply circuit with a voltage stabilizing circuit in the electronic device, there is no need to additionally configure an independent phantom power supply device and the corresponding power cord, which reduces the installation cost of the device, improves the installation efficiency of the device, and ensures the stability of the phantom power supply.

[0113] Figure 8 It is a schematic structural diagram of an electronic device provided by an embodiment of the present application. Please refer to Figure 8 , Figure 8 It may include the phantom power supply circuit described in any one of the above embodiments.

[0114] In this embodiment, by setting the above phantom power supply circuit in the electronic device, the installation cost of the device is reduced, the installation efficiency of the device is improved, and the stability of the phantom power supply is ensured.

[0115] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and the application concept of the present application, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

[0116] Those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A phantom power supply circuit, characterized in that: Applied in electronic equipment, the phantom power circuit comprises: an AC power port, a boost circuit and a voltage stabilizing circuit; The AC power port includes an AC power positive port and an AC power negative port, the AC power positive port and the AC power negative port are respectively connected to the boost circuit, and the boost circuit is used to convert the AC voltage corresponding to the AC power port into a target voltage; The voltage stabilizing circuit comprises a voltage regulating circuit, a voltage stabilizing diode and a current regulating circuit, the boost circuit is connected to the voltage regulating circuit, the voltage regulating circuit is respectively connected to the voltage stabilizing diode and the current regulating circuit, and the voltage stabilizing diode is connected to the current regulating circuit; The voltage regulating circuit is used to output a first current to the voltage regulator diode so that the voltage regulator diode outputs a first voltage, the current value corresponding to the first current is within a first preset range, the voltage value corresponding to the first voltage is within a second preset range, and the first voltage is less than the target voltage; The current regulation circuit is used to determine a target current according to the first voltage, and output the target current and the target voltage, wherein the target current is greater than the first current.

2. The phantom power supply circuit according to claim 1, characterized in that: The voltage regulating circuit includes a first transistor, a first resistor, a second transistor, a second resistor and a first capacitor, wherein: The first end of the boost circuit is connected to the emitter of the first transistor and the first end of the first resistor respectively, the base of the first transistor is connected to the second end of the first resistor, and the collector of the first transistor is connected to the first end of the second resistor; The second end of the first resistor is connected to the emitter of the second transistor, the base of the second transistor is connected to the first end of the second resistor, and the collector of the second transistor is connected to the first end of the first capacitor; The second end of the boost circuit is connected to the second end of the second resistor and the second end of the first capacitor in sequence.

3. The phantom power supply circuit according to claim 2, characterized in that: The first end of the first capacitor is connected to the cathode of the voltage stabilizing diode; The second end of the first capacitor is connected to the anode of the voltage stabilizing diode.

4. The phantom power supply circuit according to any one of claims 1 to 3, characterized in that: The current regulation circuit includes a third resistor, a third transistor, a fourth transistor and a fourth resistor, wherein: The cathode of the voltage stabilizing diode is connected to the first end of the third resistor; The second end of the third resistor is connected to the base of the third triode, the emitter of the third triode is connected to the first end of the fourth resistor, and the collector of the third triode is connected to the first end of the boost circuit; The base of the fourth transistor is connected to the first end of the fourth resistor, the collector of the fourth transistor is connected to the first end of the boost circuit, and the emitter of the fourth transistor is connected to the second end of the fourth resistor.

5. The phantom power circuit according to claim 4, characterized in that: The phantom power supply circuit further includes a protection circuit, and the protection circuit is used for protecting the third transistor and the fourth transistor.

6. The phantom power supply circuit according to claim 5, characterized in that The protection circuit includes a first diode and a second diode, wherein: The anode of the first diode is connected to the emitter of the fourth transistor; The cathode of the first diode is connected to the first end of the boost circuit; The anode of the second diode is connected to the first end of the third resistor; A cathode of the second diode is connected to the first end of the boost circuit.

7. The phantom power supply circuit according to any one of claims 1 to 3, characterized in that: The boost circuit includes a second capacitor, a third capacitor, a third diode and a fourth diode, wherein: The positive electrode port of the AC power supply is connected to the positive electrode of the third diode, the negative electrode of the third diode is connected to the first end of the second capacitor, and the second end of the second capacitor is connected to the negative electrode port of the AC power supply; The negative terminal of the AC power supply is also connected to the first end of the third capacitor, the second end of the third capacitor is connected to the positive terminal of the fourth diode, and the negative terminal of the fourth diode is connected to the positive terminal of the AC power supply.

8. The phantom power circuit according to claim 7, characterized in that: The voltage value of the target voltage is the sum of a voltage value corresponding to the second capacitor and a voltage value corresponding to the third capacitor.

9. The phantom power supply circuit according to any one of claims 1 to 3, characterized in that: The phantom power circuit further includes a fourth capacitor, wherein, The first end of the fourth capacitor is connected to the ground line, the first end of the fourth capacitor is also connected to the second end of the boost circuit, and the second end of the fourth capacitor is connected to the first end of the boost circuit.

10. An electronic device, characterized in that: The electronic device comprises a phantom power supply circuit as claimed in any one of claims 1 to 9.

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