CN219304696U - Capacitor discharge control circuit and device - Google Patents
Capacitor discharge control circuit and device Download PDFInfo
- Publication number
- CN219304696U CN219304696U CN202223510602.0U CN202223510602U CN219304696U CN 219304696 U CN219304696 U CN 219304696U CN 202223510602 U CN202223510602 U CN 202223510602U CN 219304696 U CN219304696 U CN 219304696U
- Authority
- CN
- China
- Prior art keywords
- loop
- transistor
- storage unit
- energy storage
- power supply
- 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
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 48
- 238000002955 isolation Methods 0.000 claims abstract description 38
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 238000004146 energy storage Methods 0.000 claims description 55
- 238000004804 winding Methods 0.000 claims description 32
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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
- Dc-Dc Converters (AREA)
Abstract
The application relates to a capacitor discharge control circuit and a device. The circuit comprises a switching power supply control loop, a discharging loop, a transistor and an auxiliary loop, wherein the switching power supply control loop is used for being connected with a mains supply, one end of the discharging loop is used for being connected with the switching power supply control loop through an isolation transformer, the other end of the discharging loop is used for discharging, the second pole of the transistor is connected with the other end of the discharging loop, the third pole of the transistor is used for being grounded, one end of the auxiliary loop is used for being connected with the switching power supply control loop through the isolation transformer, and the other end of the auxiliary loop is connected with the first pole of the transistor; the auxiliary loop is used for controlling the transistor to be conducted under the condition that the switching power supply control loop is in a non-working state so as to discharge the discharge loop; therefore, the transistor and the auxiliary loop are arranged, so that the discharge loop can discharge rapidly, and the circuit is simple in structure and low in cost.
Description
Technical Field
The present disclosure relates to the field of capacitive discharge technologies, and in particular, to a capacitive discharge control circuit and device.
Background
As the switching power supply is widely used in the lighting field and other fields, the switching power supply has the advantages of high efficiency, long service life, small volume and the like; the large-capacity electrolytic capacitors at the output end can store a large amount of energy when the switching power supply works, the energy stored by the large-capacity electrolytic capacitors can not be released rapidly when the switching power supply is turned off, and the power supply output end can maintain a certain voltage for a long time.
However, in some applications of the switching power supply, the energy needs to be released rapidly, and the existing switching power supply generally adopts a resistor load to discharge, so that the power supply efficiency is affected due to the fact that the resistance value is too small, and the discharge is slow due to the fact that the required discharge effect cannot be achieved due to the fact that the resistance value is too large; when other circuits are used for controlling load discharge, the problems of complex circuit structure and high cost exist.
Disclosure of Invention
In view of the above, it is necessary to provide a capacitive discharge control circuit and a capacitive discharge control device which can achieve a desired discharge effect, have a simple circuit configuration, and are low in cost.
In a first aspect, the present application provides a capacitive discharge control circuit. The capacitive discharge control circuit includes:
the switching power supply control loop is used for connecting with the mains supply;
one end of the discharging loop is connected with the switching power supply control loop through the isolation transformer, and the other end of the discharging loop is used for discharging;
the second electrode of the transistor is connected with the other end of the discharge loop, and the third electrode of the transistor is grounded;
the auxiliary circuit, one end of the auxiliary circuit is used for connecting the control circuit of the switching power supply through the isolation transformer, another end of the auxiliary circuit connects the first pole of the transistor; the auxiliary loop is used for controlling the transistor to be conducted under the condition that the switching power supply control loop is in a non-working state so as to discharge the discharge loop.
In one embodiment, the discharge loop comprises a first diode and a first energy storage unit;
the cathode of the first diode is connected with the secondary side winding of the isolation transformer, and the anode of the first diode is connected with one end of the first energy storage unit; one end of the first energy storage unit is used for discharging, the other end of the first energy storage unit is connected with a secondary side winding of the isolation transformer, and the other end of the first energy storage unit is also used for grounding.
In one embodiment, the auxiliary circuit comprises a second diode, a second energy storage unit and a resistive element;
the cathode of the second diode is connected with the secondary side winding of the isolation transformer, and the anode of the second diode is connected with one end of the second energy storage unit; one end of the second energy storage unit is connected with one end of the resistance element, the other end of the second energy storage unit is respectively connected with the secondary side winding of the isolation transformer and the other end of the resistance element, and the other end of the second energy storage unit is also used for grounding; the other end of the resistive element is connected to the first pole of the transistor.
In one embodiment, the resistive element includes a first resistor and a second resistor;
one end of the first resistor is connected with one end of the second energy storage unit and one end of the second resistor respectively, the other end of the first resistor is connected with the other end of the second resistor, and the other end of the second resistor is connected with the first pole of the transistor.
In one embodiment, the first energy storage unit comprises a first capacitor and the second energy storage unit comprises a second capacitor;
the capacitance of the first capacitor is larger than the capacitance of the second capacitor.
In one embodiment, the circuit further comprises a third resistor;
one end of the third resistor is connected with the second pole of the transistor, and the other end of the third resistor is connected with the other end of the discharge loop.
In one embodiment, one end of the switching power supply control loop is used for being connected with the mains supply, and the other end of the switching power supply control loop is connected with a primary side winding of the isolation transformer.
In one embodiment, the circuit further comprises a switching element;
one end of the switching element is used for being connected with the mains supply, and the other end of the switching element is connected with the switching power supply control loop.
In one embodiment, the transistor is a triode or a MOS transistor.
In a second aspect, the present application also provides a capacitive discharge control device. The device comprises the capacitor discharge control circuit.
The capacitor discharging control circuit comprises a switching power supply control loop, a discharging loop, a transistor and an auxiliary loop, wherein the switching power supply control loop is used for being connected with a mains supply, one end of the discharging loop is connected with the switching power supply control loop through an isolation transformer, the other end of the discharging loop is used for discharging, the second electrode of the transistor is connected with the other end of the discharging loop, the third electrode of the transistor is used for being grounded, one end of the auxiliary loop is connected with the switching power supply control loop through the isolation transformer, and the other end of the auxiliary loop is connected with the first electrode of the transistor; the auxiliary loop is used for controlling the transistor to be conducted under the condition that the switching power supply control loop is in a non-working state so as to discharge the discharge loop; therefore, the transistor and the auxiliary loop are arranged, so that the discharge loop can discharge rapidly, and the circuit is simple in structure and low in cost.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a block diagram of a capacitive discharge control circuit in one embodiment;
FIG. 2 is a circuit block diagram of a discharge loop in one embodiment;
FIG. 3 is a circuit block diagram of an auxiliary loop in one embodiment;
FIG. 4 is a circuit diagram of a capacitive discharge control circuit in one embodiment;
fig. 5 is a circuit diagram of a capacitor discharge control circuit according to another embodiment.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
Currently, in some applications of switching power supplies, the energy needs to be released quickly, for example, when the switching power supply is applied to LED (Light Emitting Diode ) lighting, the energy stored by the electrolytic capacitor needs to be released quickly when the switching power supply is turned off, so that the voltage of the LED lamp is reduced quickly, the LED lamp is prevented from flashing back after being turned off, and it is also necessary to improve the performance index for the service life of the LED and the user experience. However, the existing various measures for controlling and improving the performance index are also various, and when other circuits are adopted to control the discharge of the large electrolytic capacitor, the problems of complex circuit structure and high cost exist.
The application relates to a capacitor discharge control circuit and equipment, and the circuit structure is simple, only needs to increase an auxiliary winding and a plurality of electronic elements at the secondary of a transformer and can realize, and has the advantages of low cost, high response speed, obvious effect, reliable performance and the like.
In one embodiment, as shown in fig. 1, the present application provides a capacitive discharge control circuit, comprising:
the switching power supply control loop 110, the switching power supply control loop 110 is used for connecting the mains supply;
the discharging circuit 120, one end of the discharging circuit 120 is used for connecting the switching power supply control circuit 110 through the isolation transformer, and the other end of the discharging circuit 120 is used for discharging;
the second pole of the transistor 130 is connected with the other end of the discharge loop 120, and the third pole of the transistor 130 is used for grounding;
an auxiliary loop 140, one end of the auxiliary loop 140 is used for connecting the switching power supply control loop 110 through an isolation transformer, and the other end of the auxiliary loop 140 is connected with the first pole of the transistor 130; the auxiliary circuit 140 is used for controlling the transistor 130 to be turned on to discharge the discharge circuit when the switching power supply control circuit 110 is in a non-operating state.
Specifically, as shown in fig. 1, when the switching power supply control loop 110 is in a working state, the discharging loop 120 and the auxiliary loop 130 both receive the voltage output by the switching power supply control loop 110 through the isolation transformer, the voltage value received by the auxiliary loop 130 is slightly greater than the voltage value received by the discharging loop 120, and the transistor 130 is in a non-conducting state; under the condition that the switching power supply control loop is in a non-working state, the voltage value output by the auxiliary loop 130 is reduced, so that the voltage value output by the discharge loop 120 is greater than the voltage value output by the auxiliary loop 130, at this time, the transistor 130 is in a conducting state, so that the discharge loop 120 is rapidly discharged, and vout+ in fig. 1 is used for discharging.
In some examples, an isolation transformer may refer to a device that utilizes the principles of electromagnetic induction to change an ac voltage, with the primary functions of voltage transformation, current transformation, impedance transformation, isolation, voltage regulation (a magnetically saturated transformer), and the like. The isolating transformer includes iron core and coil with two or more windings, and the windings connected to AC power source are called primary side windings and the other windings are called secondary side windings. When the primary winding of the isolation transformer is connected to an ac power source, an alternating magnetic flux is generated in the core, which induces an alternating current in the secondary winding.
In one embodiment, as shown in fig. 2, the discharge loop may include a first diode (D1) and a first energy storage unit (C1);
the negative electrode of the first diode (D1) is connected with a secondary side winding of the isolation transformer, and the positive electrode of the first diode (D1) is connected with one end of the first energy storage unit (C1); one end of the first energy storage unit (C1) is used for discharging, the other end of the first energy storage unit (C1) is connected with a secondary side winding of the isolation transformer, and the other end of the first energy storage unit (C1) is also used for grounding.
Specifically, when the switching power supply control loop is in a working state, the first diode (D1) receives and rectifies the voltage transmitted by the secondary side winding of the isolation transformer, and the rectified voltage can be used for charging the first energy storage unit (C1); when the switching power supply control loop is in a non-working state, after the transistor is turned on, the first energy storage unit can be rapidly discharged, and vout+ in fig. 1 is used for discharging.
Further, the first energy storage unit (C1) may refer to an element capable of storing electric energy, such as a battery, an inductor, and in the embodiment of the present application, the inductor is described as an example.
In one embodiment, as shown in fig. 3, the auxiliary loop may include a second diode (D2), a second energy storage unit (C2), and a resistive element;
the cathode of the second diode (D1) is connected with the secondary side winding of the isolation transformer, and the anode of the second diode (D1) is connected with one end of the second energy storage unit (C2); one end of the second energy storage unit (C2) is connected with one end of the resistance element, the other end of the second energy storage unit (C2) is respectively connected with the secondary side winding of the isolation transformer and the other end of the resistance element, and the other end of the second energy storage unit (C2) is also used for grounding; the other end of the resistive element is connected to the first pole of the transistor.
Specifically, when the switching power supply control loop is in a working state, the second diode (D2) receives and rectifies the voltage transmitted by the secondary side winding of the isolation transformer, and the rectified voltage can be used for charging the second energy storage unit (C2); under the condition that the switching power supply control loop is in a non-working state, the voltage output by the second energy storage unit (C2) is rapidly discharged through the resistor element, so that the voltage value output by the second energy storage unit (C2) is rapidly reduced, the voltage flows to the transistor through the resistor element, at the moment, the voltage value output by the first energy storage unit (C1) is larger than the voltage value output by the second energy storage unit (C2), and the transistor is in a conducting state, so that the first energy storage unit (C1) is rapidly discharged.
In one embodiment, as shown in fig. 3, the resistive element may include a first resistor (R1) and a second resistor (R2);
one end of the first resistor (R1) is respectively connected with one end of the second energy storage unit (C2) and one end of the second resistor (R2), the other end of the first resistor (R1) is connected with the other end of the second resistor (R2), and the other end of the second resistor (R2) is connected with the first pole of the transistor.
Specifically, as shown in fig. 3, when the switching power supply control loop is in a non-working state, the voltage output by the second energy storage unit (C2) is rapidly discharged through the first resistor (R1), so that the voltage value output by the second energy storage unit (C2) is rapidly reduced, the voltage flows to the transistor through the second resistor (R2), at this time, the voltage value output by the first energy storage unit (C1) is greater than the voltage value output by the second energy storage unit (C2), and the transistor is in a conducting state, so that the first energy storage unit (C1) is rapidly discharged.
In one embodiment, the first energy storage unit comprises a first capacitor and the second energy storage unit comprises a second capacitor;
the capacitance of the first capacitor is larger than the capacitance of the second capacitor.
Specifically, the first energy storage unit (C1) shown in fig. 2 is a first capacitor, the second energy storage unit (C2) shown in fig. 3 is a second capacitor, and the capacitance value of the first capacitor is larger than that of the second capacitor; therefore, under the condition that the switching power supply control loop is in a non-working state, the switching power supply control loop stops charging the first capacitor and the second capacitor, and as the first capacitor is a large-capacity capacitor, the stored energy is large, the impedance of the discharging loop is large, and the rapid discharging cannot be realized; the second capacitor is a small capacity capacitor, the stored energy is small, the voltage output by the second capacitor is rapidly reduced by rapid discharge of the first resistor, the voltage provides a voltage smaller than the voltage of the second pole of the transistor to the first pole of the transistor through the second resistor, and the transistor is conducted so that the first capacitor is rapidly discharged.
In one embodiment, as shown in fig. 4, the circuit may further include a third resistor (R3);
one end of the third resistor (R3) is connected with the second pole of the transistor (Q1), and the other end of the third resistor (R3) is connected with the other end of the discharge loop.
Specifically, as shown in fig. 4, the second capacitor rapidly discharges through the first resistor such that the voltage at v1+ rapidly drops, which provides a voltage smaller than the second transistor to the first transistor through the second resistor, and the transistor turns on, and the first capacitor rapidly discharges through the third resistor (R3).
In one embodiment, one end of the switching power supply control loop is used for being connected with the mains supply, and the other end of the switching power supply control loop is connected with a primary side winding of the isolation transformer.
Specifically, the switching power supply control circuit outputs a voltage to the secondary winding of the isolation transformer through the primary winding of the isolation transformer.
In one embodiment, as shown in fig. 5, the circuit further includes a switching element (K1);
one end of the switching element (K1) is used for being connected with the mains supply, and the other end of the switching element (K1) is connected with a switching power supply control loop.
Specifically, as shown in fig. 5, in the case where the switching element (K1) is in the closed state, the switching power supply control loop is in the operating state; when the switching element (K1) is in a non-closed state, the switching power supply control circuit is in a non-operating state.
In one embodiment, the transistor is a triode or a MOS transistor.
Specifically, a transistor is described herein as an example, where a first pole of the transistor may refer to a base of the transistor, a second pole of the transistor may refer to an emitter of the transistor, and a third pole of the transistor may refer to a collector of the transistor.
In one embodiment, the present application also provides a capacitive discharge control device. The device comprises the capacitor discharge control circuit.
Specifically, as shown in fig. 5, the capacitive discharge control device includes the capacitive discharge control circuit described above, and when the switching element is in the closed state, the switching power supply control circuit enters the operating state, driving the primary winding of the isolation transformer into the operating state, and simultaneously, the secondary winding of the isolation transformer also starts to output voltage, the first capacitor (large capacitance) is charged with the output voltage (vout+), after rectification by the first diode, and the second capacitor (small capacitance) is charged with the output voltage (v1+), after rectification by the second diode; the secondary winding of the isolation transformer is reasonably designed, so that the rectified V < 1+ > voltage is slightly larger than Vout < + > voltage, when the switching power supply control loop enters a working state, the V < 1+ > voltage provides a voltage larger than the emitter of the triode (the triode can also be a P-type MOS tube) to the base of the triode through the second resistor, the triode is cut off, and the third resistor is not conducted.
Under the condition that the switching element is in a non-closed state, the switching power supply control loop is in a non-working state, the primary side winding of the isolation transformer is driven to enter the non-working state, meanwhile, the secondary side winding of the isolation transformer also stops charging the first capacitor and the second capacitor, and as the first capacitor is a large-capacity capacitor, the stored energy is large, the impedance of the discharge loop is large, and the rapid discharge cannot be realized; the second capacitor is a small-capacity capacitor, the stored energy is very small, the voltage of V < 1+ > is quickly reduced by quick discharge of the first resistor, the voltage provides a voltage smaller than the emitter of the triode (the triode can also be a P-type MOS tube) to the base of the triode through the second resistor so as to lead the triode to be conducted, and the third resistor is conducted so as to quickly discharge the first capacitor;
the effect of rapidly discharging the high-capacity output capacitor of the switching power supply can be achieved by reasonably selecting the resistance values of the first resistor, the second resistor and the third resistor and the parameters of the transistor.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. A capacitive discharge control circuit, the circuit comprising:
the switching power supply control loop is used for connecting with the mains supply;
one end of the discharging loop is connected with the switching power supply control loop through an isolation transformer, and the other end of the discharging loop is used for discharging;
the second electrode of the transistor is connected with the other end of the discharge loop, and the third electrode of the transistor is used for grounding;
an auxiliary circuit, one end of which is used for being connected with the switching power supply control circuit through the isolation transformer, and the other end of which is connected with the first pole of the transistor; the auxiliary loop is used for controlling the transistor to be conducted under the condition that the switching power supply control loop is in a non-working state so as to enable the discharge loop to discharge.
2. The capacitive discharge control circuit of claim 1, wherein the discharge loop comprises a first diode and a first energy storage unit;
the negative electrode of the first diode is connected with the secondary side winding of the isolation transformer, and the positive electrode of the first diode is connected with one end of the first energy storage unit; one end of the first energy storage unit is used for discharging, the other end of the first energy storage unit is connected with the secondary side winding of the isolation transformer, and the other end of the first energy storage unit is also used for grounding.
3. The capacitive discharge control circuit of claim 2, wherein the auxiliary loop comprises a second diode, a second energy storage unit, and a resistive element;
the cathode of the second diode is connected with the secondary side winding of the isolation transformer, and the anode of the second diode is connected with one end of the second energy storage unit; one end of the second energy storage unit is connected with one end of the resistance element, the other end of the second energy storage unit is respectively connected with the secondary side winding of the isolation transformer and the other end of the resistance element, and the other end of the second energy storage unit is also used for grounding; the other end of the resistive element is connected to the first pole of the transistor.
4. A capacitive discharge control circuit according to claim 3, wherein the resistive element comprises a first resistor and a second resistor;
one end of the first resistor is connected with one end of the second energy storage unit and one end of the second resistor respectively, the other end of the first resistor is connected with the other end of the second resistor, and the other end of the second resistor is connected with the first pole of the transistor.
5. The capacitive discharge control circuit of claim 3, wherein the first energy storage unit comprises a first capacitor and the second energy storage unit comprises a second capacitor;
the capacitance value of the first capacitor is larger than the capacitance value of the second capacitor.
6. The capacitive discharge control circuit of any one of claims 1 to 5, further comprising a third resistor;
one end of the third resistor is connected with the second pole of the transistor, and the other end of the third resistor is connected with the other end of the discharge loop.
7. The capacitive discharge control circuit of any one of claims 1 to 5, wherein one end of the switching power supply control loop is used for connecting to a mains supply, and the other end of the switching power supply control loop is connected to a primary side winding of the isolation transformer.
8. The capacitive discharge control circuit according to any one of claims 1 to 5, characterized in that the circuit further comprises a switching element;
one end of the switching element is used for being connected with mains supply, and the other end of the switching element is connected with the switching power supply control loop.
9. The capacitive discharge control circuit of claim 1, wherein the transistor is a transistor or a MOS transistor.
10. A capacitive discharge control device comprising the capacitive discharge control circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223510602.0U CN219304696U (en) | 2022-12-28 | 2022-12-28 | Capacitor discharge control circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223510602.0U CN219304696U (en) | 2022-12-28 | 2022-12-28 | Capacitor discharge control circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219304696U true CN219304696U (en) | 2023-07-04 |
Family
ID=86984284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223510602.0U Active CN219304696U (en) | 2022-12-28 | 2022-12-28 | Capacitor discharge control circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219304696U (en) |
-
2022
- 2022-12-28 CN CN202223510602.0U patent/CN219304696U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205490151U (en) | High -efficient electric field induction gets electric installation | |
| CN214506884U (en) | Power converter and power control chip | |
| CN110212748B (en) | Wide voltage power input circuit | |
| US7508185B2 (en) | Simple zero current switch circuit | |
| CN110995025A (en) | Switching power supply circuit | |
| CN106059307A (en) | Universal input voltage dc-dc converter employing low voltage capacitor power bank | |
| CN219304696U (en) | Capacitor discharge control circuit and device | |
| CN108565931B (en) | Battery pack voltage equalization circuit based on transformer | |
| CN203482447U (en) | Primary side feedback single-stage PFC output zero-ripple circuit | |
| CN111682757B (en) | Non-isolated high-voltage-reduction-gain DC-DC converter | |
| CN111600368B (en) | LLC circuit for large-power charger with wide output voltage range and control method thereof | |
| CN112165266B (en) | Switching power supply circuit | |
| CN213185598U (en) | Charging circuit capable of achieving zero-voltage charging | |
| CN211266788U (en) | Switching power supply circuit | |
| CN101257258B (en) | Switch power circuit | |
| CN102820786A (en) | Single-end resonance power supply device | |
| CN218678847U (en) | Switch power supply circuit adopting inductor for power supply | |
| CN101908403A (en) | Inductance element, power factor correction circuit and switch power supply | |
| CN215420103U (en) | O-Z source Boost converter | |
| CN204633592U (en) | With the pfc circuit of coupling inductance | |
| CN109889051A (en) | A kind of DCDC isolated power supply circuit | |
| CN101409509B (en) | Positive and negative stimulation type switch power circuit | |
| CN219304707U (en) | Output regulating circuit | |
| CN216819707U (en) | High-gain DC/DC converter | |
| CN212752127U (en) | Power factor compensation circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20240119 Granted publication date: 20230704 |
|
| PP01 | Preservation of patent right |