CN219227419U - AC/DC switching power supply circuit and camera - Google Patents

AC/DC switching power supply circuit and camera Download PDF

Info

Publication number
CN219227419U
CN219227419U CN202223359745.6U CN202223359745U CN219227419U CN 219227419 U CN219227419 U CN 219227419U CN 202223359745 U CN202223359745 U CN 202223359745U CN 219227419 U CN219227419 U CN 219227419U
Authority
CN
China
Prior art keywords
module
resistor
power supply
switching
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202223359745.6U
Other languages
Chinese (zh)
Inventor
刘佳辉
周志涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Uniview Technologies Co Ltd
Original Assignee
Zhejiang Uniview Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Uniview Technologies Co Ltd filed Critical Zhejiang Uniview Technologies Co Ltd
Priority to CN202223359745.6U priority Critical patent/CN219227419U/en
Application granted granted Critical
Publication of CN219227419U publication Critical patent/CN219227419U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The utility model provides an AC/DC switching power supply circuit and a camera, comprising: the device comprises an alternating current/direct current power supply module, a bridge rectifier module, a capacitance filtering module, a detection module and a switch switching module. The detection module is used for connecting a direct current power supply of the alternating current-direct current power supply module with the external output end through the switch switching module; the detection module is also used for connecting the alternating current power supply of the alternating current-direct current power supply module with the external output end after sequentially connecting the bridge rectifier module and the capacitor filter module through the switch switching module. The utility model solves the problem of voltage drop caused by direct current passing through the bridge stack under the condition of alternating current and direct current input. The detection of the power-on input end of the power supply is realized through the comparator by different voltage division values of the input power supply, and the switching input circuit is automatically identified. When the device is powered by direct current, the power consumption loss and heat generation of the device are reduced.

Description

AC/DC switching power supply circuit and camera
Technical Field
The utility model relates to the technical field of electricity, in particular to an alternating current-direct current switching power supply circuit and a camera.
Background
Currently, devices such as an Internet Protocol Camera (IPC) are adapted to various power supply modes of a field installation environment, and all adopt modes supporting two inputs of ac/dc. At the power input end of the equipment, alternating current-direct current input is realized in a bridge pile mode, or direct current is directly input through the bridge pile to supply power for a later-stage circuit.
Due to the existence of the bridge pile at the input end of the device, the voltage drop at the bridge pile can lead to the voltage drop actually input to the subsequent-stage system during direct current input, so that the power consumption is increased and the heat dissipation requirement of the system is increased. In addition, under the centralized power supply environment, since the IPC devices are all powered by direct current for a long distance, the direct current voltage at the device end may be lower than the design voltage, the bridge stack may additionally reduce the voltage amplitude of the rear stage, and at this time, the IPC devices may be restarted due to power failure caused by insufficient input voltage when the service is started and the power consumption rises after the IPC devices are started in the low power consumption stage.
Disclosure of Invention
The utility model provides an alternating current-direct current switching power supply circuit and a camera, which are used for solving the defect that in the prior art, the bridge pile can lead the voltage actually input to a rear-stage system to be reduced when direct current is input by realizing alternating current-direct current switching power supply circuit and the camera, and avoiding the voltage reduction of the rear-stage circuit when the direct current is input on the premise of ensuring the alternating current-direct current switching function.
The utility model provides an AC/DC switching power supply circuit, comprising: the bridge rectifier comprises an alternating current/direct current power supply module, a bridge rectifier module, a capacitance filtering module, a detection module and a switch switching module;
the alternating current-direct current power supply module is sequentially connected with the bridge pile rectifying module and the capacitance filtering module, the capacitance filtering module is connected with an external output end, the detection module is connected between the output end of the alternating current-direct current power supply module and the input end of the bridge pile rectifying module, the input end of the switch switching module is respectively connected with the output end of the alternating current-direct current power supply module and the output end of the detection module, and the output end of the switch switching module is connected with the external output end;
the detection module is used for connecting a direct current power supply of the alternating current-direct current power supply module with the external output end through the switch switching module;
the detection module is also used for connecting the alternating current power supply of the alternating current-direct current power supply module with the external output end after sequentially connecting the bridge rectifier module and the capacitor filter module through the switch switching module.
According to the AC/DC switching power supply circuit provided by the utility model, the detection module comprises a voltage division circuit and an AC/DC judging circuit, wherein the voltage division circuit comprises a first resistor, a second resistor and a first diode;
the first end of the first resistor is grounded, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is connected with the AC/DC power supply module, and the second end of the first resistor and the first end of the second resistor are connected with the AC/DC judging circuit.
According to the AC/DC switching power supply circuit provided by the utility model, the AC/DC power supply module comprises a first port and a second port, and the detection module comprises a first detection circuit and a second detection circuit;
the output end of the first port is connected with the input end of the first detection circuit, the output end of the first detection circuit is connected with the input end of the switch switching module, the output end of the second port is connected with the input end of the second detection circuit, and the output end of the second detection circuit is connected with the input end of the switch switching module.
According to the AC/DC switching power supply circuit provided by the utility model, the first detection circuit comprises a diode D11, a capacitor C12 and a switching tube Q1;
the first end of the diode D11 is grounded, the second end of the diode D11 is connected to the first end of the resistor R11, the second end of the resistor R11 is connected to the first end of the resistor R12, the second end of the resistor R12 is connected to the first end, the first end of the capacitor C11 is connected to the second end of the resistor R11 and the first end of the resistor R12, the second end of the capacitor C11 is connected to the first end of the resistor R13, the second end of the resistor R13 is connected to the first end of the resistor R14, the first end of the resistor R16 and the first end of the switch tube Q1, the second end of the resistor R14 and the second end of the switch tube Q1 are grounded, the third end of the switch tube Q1 is connected to the first end of the resistor R15, the first end of the capacitor C12 is connected to the first end of the resistor R15 and the input end of the switch module, and the second end of the resistor R16 and the second end of the capacitor C12 are connected to the VCC.
According to the AC/DC switching power supply circuit provided by the utility model, the second detection circuit comprises a diode D21, a capacitor C22 and a switching tube Q2;
the first end of the diode D21 is grounded, the second end of the diode D21 is connected to the first end of the resistor R21, the second end of the resistor R21 is connected to the first end of the resistor R22, the second end of the resistor R22 is connected to the first end, the first end of the capacitor C21 is connected to the second end of the resistor R21 and the first end of the resistor R22, the second end of the capacitor C21 is connected to the first end of the resistor R23, the second end of the resistor R23 is connected to the first end of the resistor R24, the first end of the resistor R26 and the first end of the switch tube Q2, the second end of the resistor R24 and the second end of the switch tube Q2 are grounded, the third end of the switch tube Q2 is connected to the first end of the resistor R25, the first end of the capacitor C22 is connected to the first end of the resistor R25 and the input end of the switch module, and the second end of the resistor R26 and the second end of the capacitor C22 are connected to the VCC.
According to the AC/DC switching power supply circuit provided by the utility model, the output ends of the first detection circuit and the second detection circuit are connected with the input ends of the logic AND circuit, and the output ends of the logic AND circuit are connected with the switch switching module.
According to the alternating current-direct current switching power supply circuit provided by the utility model, the bridge rectifier module comprises a half bridge D1, a half bridge D2, a half bridge D3 and a half bridge D4;
the positive pole of half bridge D1 is connected first port with the negative pole of half bridge D4, the positive pole of half bridge D2 is connected the second port with the negative pole of half bridge D3, the negative pole of half bridge D1 with the negative pole of half bridge D2 meets and connects capacitive filter module's first end, half bridge D3 with the positive pole of half bridge D4 meets and connects capacitive filter module's second end.
According to the AC/DC switching power supply circuit provided by the utility model, the capacitance filtering module comprises a transistor D5, a capacitor C1 and a capacitor C2;
the first end of the transistor D5 is connected with the first end of the bridge rectifier module and the external output end, the second end of the transistor D5 is connected with the second end of the bridge rectifier module and grounded, and the transistor D5, the capacitor C1 and the capacitor C2 are connected in parallel.
According to the AC/DC switching power supply circuit provided by the utility model, the switch switching module comprises a relay switching circuit or a MOS tube switching circuit.
The utility model also provides a camera, which comprises a camera body and the alternating current-direct current switching power supply circuit.
The alternating current-direct current switching power supply circuit and the camera provided by the utility model are used for specially solving the problem of voltage drop caused by direct current passing through a bridge stack under the condition of alternating current-direct current input. The detection of the power-on input end of the power supply is realized through the comparator by different voltage division values of the input power supply, and the switching input circuit is automatically identified. When the device is powered by direct current, the power consumption loss and heat generation of the device are reduced. In a centralized power supply environment, after the equipment is judged in the power-on stage and is switched, the requirement on the amplitude of the input voltage can be reduced when the overall power consumption of the equipment is increased.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an ac/dc switching power supply circuit according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a first detection circuit according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a second detection circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a logic AND circuit according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a bridge rectifier module and a capacitive filter module according to an embodiment of the present utility model;
fig. 6 is a schematic diagram of a camera structure according to an embodiment of the present utility model.
Reference numerals:
110: an AC/DC power supply module; 120: bridge rectifier module; 130: a capacitive filter module; 140: a detection module; 150: and a switch switching module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The ac/dc switching power supply circuit of the present utility model is described below with reference to fig. 1 to 5, and as shown in fig. 1, the ac/dc switching power supply circuit of the present utility model includes: the bridge rectifier module comprises an alternating current-direct current power supply module 110, a bridge rectifier module 120, a capacitance filtering module 130, a detection module 140 and a switch switching module 150;
the ac/dc power module 110 is sequentially connected to the bridge rectifier module 120 and the capacitor filter module 130, the capacitor filter module 130 is connected to an external output end, the detection module 140 is connected between the output end of the ac/dc power module 110 and the input end of the bridge rectifier module 120, the input end of the switch switching module is respectively connected to the output end of the ac/dc power module 110 and the output end of the detection module 140, and the output end of the switch switching module is connected to the external output end;
the detection module 140 is configured to connect the dc power supply of the ac/dc power supply module 110 to the external output terminal through the switch switching module;
the detection module 140 is further configured to connect the ac power of the ac/dc power module 110 to the external output terminal after sequentially connecting the bridge rectifier module 120 and the capacitor filter module 130 through the switch switching module.
It should be noted that, in the embodiment of the present utility model, the AC/DC power module 110 supports two modes of AC/DC input, and supports reverse connection during DC input. Therefore, to avoid the problem of voltage drop when the dc input passes through the bridge stack, the detection module 140 can determine the input power type by detecting the level input by the current power module, and when the detection module 140 determines that the ac input is still passing through bridge stack rectification and capacitive filtering, a stable dc voltage VIN is provided to the subsequent stage. When the detection module 140 determines that the dc input is received, the bridge rectifier is skipped to directly provide the stable dc voltage VIN to the subsequent stage.
In addition, the input end of the ac/dc power module 110 is further provided with a protection circuit, so as to ensure stable power supply access.
The alternating current-direct current switching power supply circuit solves the problem that under the condition of alternating current and direct current input, direct current passes through a bridge stack to cause voltage drop. The detection of the power-on input end of the power supply is realized through the comparator by different voltage division values of the input power supply, and the switching input circuit is automatically identified. When the device is powered by direct current, the power consumption loss and heat generation of the device are reduced. In a centralized power supply environment, after the equipment is judged in the power-on stage and is switched, the requirement on the amplitude of the input voltage can be reduced when the overall power consumption of the equipment is increased.
It can be understood that the detection module comprises a voltage dividing circuit and an alternating current/direct current judging circuit, wherein the voltage dividing circuit comprises a first resistor, a second resistor and a first diode;
the first end of the first resistor is grounded, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is connected with the AC/DC power supply module, and the second end of the first resistor and the first end of the second resistor are connected with the AC/DC judging circuit.
It should be noted that, the voltage dividing resistor is designed in the detection module, and the input voltage value is transmitted to the comparator of the detection module after being divided by the resistor to further judge the level. Because the anode and the cathode of the alternating current can support mixed insertion when the alternating current is input, a first resistor, a second resistor and a first diode are added at two input ends, the divided voltage is respectively input into a detection circuit, and meanwhile, the first diode connected in series in the voltage dividing circuit is used for locking the level after the voltage division above 0 level.
It can be understood that the ac/dc power module includes a first port and a second port, and the detection module includes a first detection circuit and a second detection circuit;
the output end of the first port is connected with the input end of the first detection circuit, the output end of the first detection circuit is connected with the input end of the switch switching module, the output end of the second port is connected with the input end of the second detection circuit, and the output end of the second detection circuit is connected with the input end of the switch switching module.
It should be noted that, in the embodiment of the present utility model, the AC/DC power supply includes two ports, one of which is an AC24v+/DC24V input terminal, and the other of which is an AC24V-/GND input terminal, and the ports may be reversely connected when the input is DC24V and GND. AC24v+ and AC 24V-constitute an alternating voltage input of 24V, and DC24V and GND constitute a direct voltage input of 24V. And the first detection circuit and the second detection circuit respectively correspond to the detection of the voltages of the two ports.
It can be appreciated that the first detection circuit includes a diode D11, a capacitor C12, and a switching tube Q1;
the first end of the diode D11 is grounded, the second end of the diode D11 is connected to the first end of the resistor R11, the second end of the resistor R11 is connected to the first end of the resistor R12, the second end of the resistor R12 is connected to the first end, the first end of the capacitor C11 is connected to the second end of the resistor R11 and the first end of the resistor R12, the second end of the capacitor C11 is connected to the first end of the resistor R13, the second end of the resistor R13 is connected to the first end of the resistor R14, the first end of the resistor R16 and the first end of the switch tube Q1, the second end of the resistor R14 and the second end of the switch tube Q1 are grounded, the third end of the switch tube Q1 is connected to the first end of the resistor R15, the first end of the capacitor C12 is connected to the first end of the resistor R15 and the input end of the switch module, and the second end of the resistor R16 and the second end of the capacitor C12 are connected to the VCC.
As shown in fig. 2, the AC24v+/DC24V of the first port is an input terminal, and outputs the control signal ctrl+. The working principle of the circuit is as follows:
when the AC24V+/DC24V port input is a direct current voltage, the base electrode of the switch tube Q1 is kept at a low level due to the existence of the capacitor C11, the capacitor C12 is charged, and the CTRL+ output is at a high level.
When the AC24V+/DC24V port input is an alternating current voltage, the divided voltage level of the diode D11 is locked above 0 level, the CTRL+ output is low level after the switching tube Q1 is conducted in the positive half period of the alternating current, and the CTRL+ output is low level by discharging the C12 in the negative half period of the alternating current.
Note that, the switching transistor Q1 is a transistor, and the basic structure of the transistor is two reverse-coupled pn junctions, and there may be two combinations of pnp and npn. The method comprises the following steps: e emitter, C collector and B base. Corresponding to the switching tube Q1 in fig. 2, the first end of the switching tube Q1 is a base, the second end of the switching tube Q1 is an emitter, and the third end of the switching tube Q1 is a collector.
It can be appreciated that the second detection circuit includes a diode D21, a capacitor C22, and a switching tube Q2;
the first end of the diode D21 is grounded, the second end of the diode D21 is connected to the first end of the resistor R21, the second end of the resistor R21 is connected to the first end of the resistor R22, the second end of the resistor R22 is connected to the first end, the first end of the capacitor C21 is connected to the second end of the resistor R21 and the first end of the resistor R22, the second end of the capacitor C21 is connected to the first end of the resistor R23, the second end of the resistor R23 is connected to the first end of the resistor R24, the first end of the resistor R26 and the first end of the switch tube Q2, the second end of the resistor R24 and the second end of the switch tube Q2 are grounded, the third end of the switch tube Q2 is connected to the first end of the resistor R25, the first end of the capacitor C22 is connected to the first end of the resistor R25 and the input end of the switch module, and the second end of the resistor R26 and the second end of the capacitor C22 are connected to the VCC.
It should be noted that the same scheme is also adopted at the other input terminal of the AC24V-/GND to output CTRL-, and the CTRL +/-passes through the logic AND circuit to output the control signal CTRL of the switch module. The working principle of the circuit is as follows:
when the AC24V-/GND port input is a direct voltage, the base of the switching tube Q2 remains low due to the capacitor C21, and the capacitor C22 charges and the CTRL-output goes high.
When the AC24V-/GND port input is an alternating voltage, the divided voltage level is locked above 0 level by the diode D21, the CTRL-output is low level after the switching tube Q2 is conducted in the positive half period of the alternating current, and the CTRL-output is low level by discharging the C22 in the negative half period of the alternating current.
Note that, the switching transistor Q2 is a triode, and corresponds to the switching transistor Q2 in fig. 3, the first end of the switching transistor Q2 is a base, the second end of the switching transistor Q2 is an emitter, and the third end of the switching transistor Q2 is a collector.
It will be appreciated that as shown in fig. 4, the logic and circuit includes two diodes, the positive electrode of the diode D30 is connected to the control signal ctrl+, the positive electrode of the diode D31 is connected to the control signal CTRL-, and the negative electrode of the diode D31 is connected to the diode D30 to generate the control signal CTRL.
It is understood that the switch switching module includes a relay switching circuit or a MOS transistor switching circuit.
It should be noted that, through the CTRL control signal, the kind of the accessed power source can be judged through the CTRL control signal, and the switching module circuit is switched and changed according to the kind control switch, specifically including connecting AC24v+ and AC 24V-to the bridge rectifier module and the capacitor filter module, accessing to the VIN and GND of the subsequent stage, accessing DC24V and GND to the VIN and GND of the subsequent stage, and skipping the bridge.
It is understood that the output ends of the first detection circuit and the second detection circuit are connected with the input ends of the logic AND circuit, and the output ends of the logic AND circuit are connected with the switch switching module.
It will be appreciated that, as shown in fig. 5, the bridge rectifier module includes a half bridge D1, a half bridge D2, a half bridge D3, and a half bridge D4;
the positive pole of half bridge D1 is connected first port with the negative pole of half bridge D4, the positive pole of half bridge D2 is connected the second port with the negative pole of half bridge D3, the negative pole of half bridge D1 with the negative pole of half bridge D2 meets and connects capacitive filter module's first end, half bridge D3 with the positive pole of half bridge D4 meets and connects capacitive filter module's second end.
It should be noted that, the half bridge D1, the half bridge D2, the half bridge D3 and the half bridge D4 are all formed by sealing two diode bridge commutations together, and a bridge commutating circuit can be formed by using two half bridges. In each working period of the bridge pile, only two diodes work at the same time, and alternating current is converted into unidirectional direct current pulsating voltage through the unidirectional conduction function of the diodes.
It will be appreciated that, as shown in fig. 5, the capacitive filter module includes a transistor D5, a capacitor C1 and a capacitor C2;
the first end of the transistor D5 is connected with the first end of the bridge rectifier module and the external output end, the second end of the transistor D5 is connected with the second end of the bridge rectifier module and grounded, and the transistor D5, the capacitor C1 and the capacitor C2 are connected in parallel.
It should be noted that, the transistor D5 is formed by two reversely connected diodes, and the device is powered down instantaneously when the switching module is switched, so that the capacitance C1/C2 of the later stage of the bridge stack is sufficient to support the device to provide the energy required by the device at the moment when the switching of the switch is completed. The judgment execution of the logic switching needs to be carried out in the immediately-powered-on stage of the equipment, the power consumption of the equipment is smaller, and the capacitance C1/C2 of the later stage of the bridge stack is smaller. In addition, in the centralized power supply environment, after the equipment is judged in the power-on stage and is switched, when the overall power consumption of the equipment is increased, the requirement on the amplitude of the input voltage can be reduced.
The camera provided by the utility model is described below, and an ac/dc switching power supply circuit in the camera described below and the above description can be referred to correspondingly. The camera shown in fig. 6 includes a camera body 220 and any of the ac/dc switching power supply circuits 210 of the above embodiments.
The ac/dc power module 110 is sequentially connected to the bridge rectifier module 120 and the capacitor filter module 130, the capacitor filter module 130 is connected to the camera body 220, the detection module 140 is connected between the output end of the ac/dc power module 110 and the input end of the bridge rectifier module 120, the input end of the switch switching module is respectively connected to the output end of the ac/dc power module 110 and the output end of the detection module 140, and the output end of the switch switching module is connected to the camera body 220;
the detection module 140 is configured to connect the dc power supply of the ac/dc power supply module 110 to the camera body 220 through the switch switching module;
the detection module 140 is further configured to connect the ac power supply of the ac/dc power supply module 110 to the bridge rectifier module 120 and the capacitor filter module 130 in sequence through the switch switching module, and then connect the bridge rectifier module with the camera body 220.
According to the camera, the power supply circuit is compatible with AC and DC, and can reduce power consumption and loss and raise the voltage value of the input rear stage when in DC power supply. The detection of the power-on input end of the power supply is realized through the comparator by different voltage division values of the input power supply, and the switching input circuit is automatically identified. When the device is powered by direct current, the power consumption loss and heat generation of the device are reduced. In a centralized power supply environment, after the equipment is judged in the power-on stage and is switched, the requirement on the amplitude of the input voltage can be reduced when the overall power consumption of the equipment is increased.
In addition, it should be noted that the detection module in the ac/dc switching power supply circuit may also implement the judgment logic through the micro control unit (Microcontroller Unit, MCU).
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. An ac/dc switching power supply circuit, comprising: the bridge rectifier comprises an alternating current/direct current power supply module, a bridge rectifier module, a capacitance filtering module, a detection module and a switch switching module;
the alternating current-direct current power supply module is sequentially connected with the bridge pile rectifying module and the capacitance filtering module, the capacitance filtering module is connected with an external output end, the detection module is connected between the output end of the alternating current-direct current power supply module and the input end of the bridge pile rectifying module, the input end of the switch switching module is respectively connected with the output end of the alternating current-direct current power supply module and the output end of the detection module, and the output end of the switch switching module is connected with the external output end;
the detection module is used for connecting a direct current power supply of the alternating current-direct current power supply module with the external output end through the switch switching module;
the detection module is also used for connecting the alternating current power supply of the alternating current-direct current power supply module with the external output end after sequentially connecting the bridge rectifier module and the capacitor filter module through the switch switching module.
2. The ac/dc switching power supply circuit according to claim 1, wherein the detection module includes a voltage dividing circuit and an ac/dc judgment circuit, the voltage dividing circuit including a first resistor, a second resistor, and a first diode;
the first end of the first resistor is grounded, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is connected with the AC/DC power supply module, and the second end of the first resistor and the first end of the second resistor are connected with the AC/DC judging circuit.
3. An ac/dc switched supply circuit as claimed in claim 1 or claim 2, wherein the ac/dc power supply module comprises a first port and a second port, and the detection module comprises a first detection circuit and a second detection circuit;
the output end of the first port is connected with the input end of the first detection circuit, the output end of the first detection circuit is connected with the input end of the switch switching module, the output end of the second port is connected with the input end of the second detection circuit, and the output end of the second detection circuit is connected with the input end of the switch switching module.
4. An ac/dc switching power supply circuit according to claim 3, wherein said first detection circuit comprises a diode D11, a capacitor C12 and a switching tube Q1;
the first end of the diode D11 is grounded, the second end of the diode D11 is connected to the first end of the resistor R11, the second end of the resistor R11 is connected to the first end of the resistor R12, the second end of the resistor R12 is connected to the first end, the first end of the capacitor C11 is connected to the second end of the resistor R11 and the first end of the resistor R12, the second end of the capacitor C11 is connected to the first end of the resistor R13, the second end of the resistor R13 is connected to the first end of the resistor R14, the first end of the resistor R16 and the first end of the switch tube Q1, the second end of the resistor R14 and the second end of the switch tube Q1 are grounded, the third end of the switch tube Q1 is connected to the first end of the resistor R15, the first end of the capacitor C12 is connected to the first end of the resistor R15 and the input end of the switch module, and the second end of the resistor R16 and the second end of the capacitor C12 are connected to the VCC.
5. An ac/dc switching power supply circuit according to claim 3, wherein the second detection circuit comprises a diode D21, a capacitor C22, and a switching tube Q2;
the first end of the diode D21 is grounded, the second end of the diode D21 is connected to the first end of the resistor R21, the second end of the resistor R21 is connected to the first end of the resistor R22, the second end of the resistor R22 is connected to the first end, the first end of the capacitor C21 is connected to the second end of the resistor R21 and the first end of the resistor R22, the second end of the capacitor C21 is connected to the first end of the resistor R23, the second end of the resistor R23 is connected to the first end of the resistor R24, the first end of the resistor R26 and the first end of the switch tube Q2, the second end of the resistor R24 and the second end of the switch tube Q2 are grounded, the third end of the switch tube Q2 is connected to the first end of the resistor R25, the first end of the capacitor C22 is connected to the first end of the resistor R25 and the input end of the switch module, and the second end of the resistor R26 and the second end of the capacitor C22 are connected to the VCC.
6. An ac/dc switching power supply circuit according to claim 3 wherein the output of the first detection circuit and the output of the second detection circuit are connected to the input of a logical and circuit, the output of the logical and circuit being connected to the switching module.
7. An ac/dc switching power supply circuit according to claim 3, wherein said bridge rectifier module comprises a half bridge D1, a half bridge D2, a half bridge D3 and a half bridge D4;
the positive pole of half bridge D1 is connected first port with the negative pole of half bridge D4, the positive pole of half bridge D2 is connected the second port with the negative pole of half bridge D3, the negative pole of half bridge D1 with the negative pole of half bridge D2 meets and connects capacitive filter module's first end, half bridge D3 with the positive pole of half bridge D4 meets and connects capacitive filter module's second end.
8. An ac/dc switching power supply circuit according to claim 1 or 2, wherein the capacitive filter module comprises a transistor D5, a capacitor C1 and a capacitor C2;
the first end of the transistor D5 is connected with the first end of the bridge rectifier module and the external output end, the second end of the transistor D5 is connected with the second end of the bridge rectifier module and grounded, and the transistor D5, the capacitor C1 and the capacitor C2 are connected in parallel.
9. An ac/dc switching power supply circuit according to claim 1 or 2 wherein the switch switching module comprises a relay switching circuit or a MOS transistor switching circuit.
10. A camera, comprising a camera body and the ac/dc switching power supply circuit of any one of claims 1 to 9.
CN202223359745.6U 2022-12-14 2022-12-14 AC/DC switching power supply circuit and camera Active CN219227419U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223359745.6U CN219227419U (en) 2022-12-14 2022-12-14 AC/DC switching power supply circuit and camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223359745.6U CN219227419U (en) 2022-12-14 2022-12-14 AC/DC switching power supply circuit and camera

Publications (1)

Publication Number Publication Date
CN219227419U true CN219227419U (en) 2023-06-20

Family

ID=86753536

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223359745.6U Active CN219227419U (en) 2022-12-14 2022-12-14 AC/DC switching power supply circuit and camera

Country Status (1)

Country Link
CN (1) CN219227419U (en)

Similar Documents

Publication Publication Date Title
CN100492836C (en) Single conversion power converter with hold-up time and its method
CN104124878B (en) Power supply module, switching power source chip and switch power supply system
CN110417251B (en) PFC circuit and air conditioner
CN211508931U (en) Power supply identification conversion circuit and air conditioner
CN219227419U (en) AC/DC switching power supply circuit and camera
CN203942462U (en) A kind of synchronous rectification BOOST circuit that carries reverse-filling protection
CN203456880U (en) Intelligent control apparatus for solving problem of frequent morning-evening starting of photovoltaic grid-connected inverter
CN203775457U (en) Control apparatus of emergency lamp
CN115932386A (en) Electric energy metering circuit and electric energy metering device
CN103329626A (en) LED driving circuit and LED driving chip
CN207009368U (en) A kind of new resistance-capacitance depressurization and relay drive circuit
CN105471248B (en) A kind of Switching Power Supply start-up circuit
CN204030994U (en) Supply module, switching power source chip and switch power supply system
CN211018672U (en) Active diode circuit and alternating current-direct current power supply conversion circuit
CN106059280A (en) Photovoltaic inverter auxiliary power supply and start-stop control method
CN111048055A (en) Display and display standby power consumption control method
CN209949483U (en) Single-pole multi-mode wide-range input voltage electrolytic-capacitor-free LED driver
CN203326884U (en) Primary-side constant-current control quasi-single-stage high-power-factor circuit and device
CN104124698A (en) Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter
CN205355915U (en) Weak wind of low light level control circuit that charges
CN210016403U (en) Frequency converter power supply circuit
CN114441926B (en) IGBT desaturation detection circuitry
WO2022041586A1 (en) Power factor correction circuit, and control apparatus and control method therefor
CN215817541U (en) Power supply circuit for reducing reactive current
CN219802153U (en) Frequency converter brake circuit

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant