CN218006106U - Driving circuit, controllable circuit and air conditioner external unit system - Google Patents
Driving circuit, controllable circuit and air conditioner external unit system Download PDFInfo
- Publication number
- CN218006106U CN218006106U CN202222122578.7U CN202222122578U CN218006106U CN 218006106 U CN218006106 U CN 218006106U CN 202222122578 U CN202222122578 U CN 202222122578U CN 218006106 U CN218006106 U CN 218006106U
- Authority
- CN
- China
- Prior art keywords
- limiting element
- current limiting
- circuit
- voltage
- current
- 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
Images
Landscapes
- Power Conversion In General (AREA)
Abstract
The utility model provides an outer machine system of drive circuit, controllable circuit and air conditioner. The driving circuit is used for converting an input voltage into a driving voltage, and comprises: a first current limiting element and a second current limiting element connected in series with each other; the regulating circuit is electrically connected with the first current limiting element, when the input voltage is larger than a first voltage, the regulating circuit is conducted to enable the first current limiting element to be short-circuited by the regulating circuit, the input voltage is converted into the driving voltage by the second current limiting element, when the short-circuited time of the first current limiting element meets a preset condition, the regulating circuit is disconnected, and the input voltage is converted into the driving voltage by the first current limiting element and the second current limiting element. The driving circuit can reduce circuit loss and improve circuit efficiency.
Description
Technical Field
The utility model relates to a circuit field, concretely relates to outer machine system of drive circuit, controllable circuit and air conditioner.
Background
In current drive circuits, control of current driven devices is often involved. The on current of a current driven device is typically greater than the standby current. In order to ensure that the current-driven device can be normally turned on, a larger current is usually applied to the current-driven device in the prior art. However, if the current-driven device is controlled by using the larger current after the current-driven device is turned on, the extra loss of the driving circuit will be undoubtedly caused, so the current control process of the current-driven device has the problem of high loss.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a driving circuit, a controllable circuit and an air conditioner external unit system, which are used to solve the above-mentioned problems existing in the prior art.
To achieve the above and other related objects, a first aspect of the present invention provides a driving circuit for converting an input voltage into a driving voltage, including: a first current limiting element and a second current limiting element connected in series with each other; and the regulating circuit is electrically connected with the first current limiting element, is conducted when the input voltage is greater than a first voltage so that the first current limiting element is short-circuited by the regulating circuit, converts the input voltage into the driving voltage by the second current limiting element, and is disconnected when the short-circuited time of the first current limiting element meets a preset condition, and converts the input voltage into the driving voltage by the first current limiting element and the second current limiting element.
In an embodiment of the present invention, the adjusting circuit includes: the voltage-controlled switch and the energy storage element, two connecting ends of the voltage-controlled switch are respectively connected with two ends of the first current-limiting element, and two ends of the energy storage element are respectively connected with the input end of the driving circuit and the control end of the voltage-controlled switch.
In an embodiment of the present invention, the first end of the first current-limiting element is connected to the second current-limiting element, and the second end of the first current-limiting element is connected to the dc power supply, the driving circuit further includes a third current-limiting unit, and two ends of the third current-limiting unit are respectively connected to the dc power supply and the control end of the voltage-controlled switch.
In an embodiment of the present invention, the voltage-controlled switch is an N-channel depletion type fet, two connection ends of the voltage-controlled switch are respectively the source electrode of the N-channel depletion type fet and the drain electrode of the N-channel depletion type fet, the drain electrode and the second end of the first current-limiting element and the one end of the second current-limiting element are electrically connected, the source electrode and the drain electrode and the first end of the first current-limiting element and the one end of the third current-limiting unit are electrically connected, the control end of the voltage-controlled switch is the gate electrode of the N-channel depletion type fet, the gate electrode and the other end of the third current-limiting unit and the one end of the energy-storing element are electrically connected.
In an embodiment of the present invention, the driving circuit further includes a heat-sensitive element, the heat-sensitive element is electrically connected to the dc power supply, and the heat-sensitive element is used for protecting the driving circuit.
In an embodiment of the present invention, the driving circuit further includes a silicon controlled rectifier, an anode of the silicon controlled rectifier is electrically connected to one end of the first current limiting element and one end of the thermal sensitive element, a cathode of the silicon controlled rectifier is electrically connected to the other end of the thermal sensitive element, and when the silicon controlled rectifier is turned on, the thermal sensitive element is short-circuited.
In an embodiment of the present invention, the dc power supply includes a first dc power supply and a second dc power supply, the first dc power supply is respectively connected to one end of the thermistor and the anode of the thyristor, and the second dc power supply is respectively connected to the other end of the thermistor and the cathode of the thyristor.
In an embodiment of the present invention, the driving circuit includes an amplifying unit, an isolating unit and a filtering unit, the amplifying unit is used for sending an amplified electrical signal to the isolating unit, so that the isolating unit is turned on, the isolating unit is connected with the filtering unit electrically, the isolating unit is used for realizing the one-way transmission of the electrical signal generated by the driving circuit, the filtering unit is connected with the second current-limiting element electrically, and the filtering unit is used for filtering the electrical signal generated by the dc power supply.
A second aspect of the present invention provides a controllable circuit, the controllable circuit includes a control circuit, a main circuit and the driving circuit of the first aspect, the control circuit passes through the driving circuit and the main circuit is electrically connected.
The utility model discloses a third aspect provides an outer machine system of air conditioner, outer machine system of air conditioner includes the utility model discloses the first aspect arbitrary item drive circuit.
As described above, the utility model discloses drive circuit, controllable circuit and outer quick-witted system of air conditioner have following beneficial effect according to one or more embodiments:
the driving circuit comprises a first current limiting element and a second current limiting element which are connected in series with each other; the regulating circuit is electrically connected with the first current limiting element, when the input voltage is larger than a first voltage, the regulating circuit is conducted to enable the first current limiting element to be short-circuited by the regulating circuit, the input voltage is converted into the driving voltage by the second current limiting element, when the short-circuited time of the first current limiting element meets a preset condition, the regulating circuit is disconnected, and the input voltage is converted into the driving voltage by the first current limiting element and the second current limiting element. Therefore, when the driven device needs to be turned on, namely the input voltage is greater than the first voltage, the driving circuit converts the input voltage into the driving voltage only through the first current limiting element, so that a larger driving current can be provided to meet the turning-on requirement of the driven device. After the driven device is conducted, namely when the time that the first current limiting element is short-circuited meets a preset condition, the first current limiting element and the second current limiting element jointly convert the input voltage into the driving voltage, and at the moment, the driving current is small, so that the circuit loss can be reduced, and the circuit efficiency can be improved.
Drawings
Fig. 1 is a schematic circuit diagram of the driving circuit according to an embodiment of the present invention. Fig. 2 shows the circuit schematic diagram of the driving circuit in an embodiment of the present invention fig. 3 shows that in an embodiment of the present invention fig. 4 shows that in an embodiment of the present invention fig. 5 shows that in an embodiment of the present invention, the structure schematic diagram of the controllable circuit in an embodiment of the present invention is shown.
Description of the element reference numerals
1. Driving circuit
11. A first current limiting element
12. Second current limiting element
13. Regulating circuit
131. Voltage controlled switch
132. Energy storage element
133. Third current limiting unit
14. Direct current power supply
141. First direct current power supply
142. Second DC power supply
15. Thermosensitive element
16. Silicon controlled rectifier
17. Amplification unit
171. Second supply voltage
172. Fifth resistor
173. Sixth resistor
174. Seventh resistor
175. Triode transistor
18. Isolation unit
181. First supply voltage
19. Filter unit
191. Filter capacitor
192. Fourth resistor
193. Diode with a high-voltage source
20. Circuit control signal
300. Controllable circuit
2. Control circuit
3. Main circuit
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
In the current driving circuit, the control of the current driving device is often involved, because the on current and the holding current of the current driving device are often different, if the current driving device is controlled by using a fixed current all the time, extra loss of the driving circuit is undoubtedly caused, and thus the current control process of the current driving device has the problems of high loss and the like. At least in view of the problem, the present invention provides a driving circuit, which includes a first current limiting element and a second current limiting element connected in series with each other; the regulating circuit is electrically connected with the first current limiting element, when the input voltage is larger than a first voltage, the regulating circuit is conducted to enable the first current limiting element to be short-circuited by the regulating circuit, the input voltage is converted into the driving voltage by the second current limiting element, when the short-circuited time of the first current limiting element meets a preset condition, the regulating circuit is disconnected, and the input voltage is converted into the driving voltage by the first current limiting element and the second current limiting element. Therefore, when the driven device needs to be turned on, namely the input voltage is greater than the first voltage, the driving circuit converts the input voltage into the driving voltage only through the first current limiting element, so that a larger driving current can be provided to meet the turning-on requirement of the driven device. After the driven device is conducted, namely when the time that the first current limiting element is short-circuited meets a preset condition, the first current limiting element and the second current limiting element jointly convert the input voltage into the driving voltage, and at the moment, the driving current is small, so that the circuit loss can be reduced, and the circuit efficiency can be improved.
In an embodiment of the present invention, please refer to fig. 1 and fig. 2. The driving circuit 1 is used for converting an input voltage into a driving voltage, and includes: a first current limiting element 11 and a second current limiting element 12 connected in series with each other; a regulating circuit 13, wherein the regulating circuit 13 is electrically connected to the first current limiting element 11, when the input voltage is greater than a first voltage, the regulating circuit 13 is turned on to short-circuit the first current limiting element 11 by the regulating circuit 13, the input voltage is converted into the driving voltage by the second current limiting element 12, when a time when the first current limiting element 11 is short-circuited satisfies a preset condition, the regulating circuit 13 is turned off, and the input voltage is converted into the driving voltage by the first current limiting element 11 and the second current limiting element 12. The first current limiting element 11 may be a first resistor, and the second current limiting element 12 may be a second resistor. The first voltage may be a turn-on voltage of the regulating circuit 13, and the regulating circuit 13 is turned on only when the input voltage is greater than the turn-on voltage. In addition, the preset condition may be a time constant threshold, and the adjusting circuit 13 is turned off when the time for which the first current limiting element 11 is short-circuited is greater than the time constant threshold, where the time constant threshold is related to circuit elements in the adjusting circuit 13, and the embodiment is not specifically limited herein. The input voltage is provided by the input unit, and the input unit may be an electronic element or a circuit, which is not limited herein.
Optionally, the adjusting circuit 13 includes a voltage-controlled switch 131 and an energy storage element 132, two connection ends of the voltage-controlled switch 131 are respectively connected to two ends of the first current limiting element 11, and two ends of the energy storage element 132 are respectively connected to the input end of the driving circuit 1 and the control end of the voltage-controlled switch 131. The energy storage element 132 may be an electrolytic capacitor, an anode of the electrolytic capacitor is connected to the input terminal of the driving circuit 1, and a cathode of the electrolytic capacitor is connected to the control terminal of the voltage-controlled switch 131.
Optionally, the first end of the first current limiting element 11 is connected to the second current limiting element 12, the second end of the first current limiting element is connected to the dc power supply 14, the driving circuit 1 further includes a third current limiting unit 133, and two ends of the third current limiting unit 133 are respectively connected to the dc power supply 14 and the control end of the voltage-controlled switch 131. The third current limiting unit 133 may be a third resistor.
Optionally, the voltage-controlled switch 131 is an N-channel depletion mode fet, two connection ends of the voltage-controlled switch 131 are a source of the N-channel depletion mode fet and a drain of the N-channel depletion mode fet, the drain is electrically connected to the second end of the first current-limiting element 11 and one end of the second current-limiting element 12, the source is electrically connected to the first end of the first current-limiting element 11 and one end of the third current-limiting unit 133, the control end of the voltage-controlled switch 131 is a gate of the N-channel depletion mode fet, and the gate is electrically connected to the other end of the third current-limiting unit 133 and one end of the energy-storing element 132.
Optionally, referring to fig. 3 and 4, the driving circuit 1 further includes a thermal element 15, the thermal element 15 is electrically connected to the dc power supply 14, and the thermal element 15 is used to protect the driving circuit 1. The thermistor 15 may be a thermistor, and the thermistor is configured to limit a transient spike current when the transient spike current is formed in the driving circuit 1, so as to prevent the circuit elements in the driving circuit 1 from being damaged.
Optionally, the driving circuit 1 further includes a thyristor 16, an anode of the thyristor 16 is electrically connected to one end of the first current limiting element 11 and one end of the thermal element 15, a cathode of the thyristor 16 is electrically connected to the other end of the thermal element 15, and when the thyristor 16 is turned on, the thermal element 15 is short-circuited. The thermistor 15 is used for short-circuiting the thermistor 15 after the voltage of the driving circuit 1 is stabilized, thereby reducing the influence of a large resistance of the thermistor 15 on the driving circuit 1.
Alternatively, the dc power supply 14 includes a first dc power supply 141 and a second dc power supply 142, the first dc power supply 141 is electrically connected to one end of the thermistor 15 and the anode of the thyristor 16, respectively, and the second dc power supply 142 is electrically connected to the other end of the thermistor 15 and the cathode of the thyristor 16, respectively.
Optionally, the driving circuit 1 includes an amplifying unit 17, an isolating unit 18 and a filtering unit 19, where the amplifying unit 17 is configured to send an amplified electrical signal to the isolating unit 18, so that the isolating unit 18 is turned on, the isolating unit 18 is electrically connected to the filtering unit 19, the isolating unit 18 is configured to implement unidirectional transmission of the electrical signal generated by the driving circuit 1, the filtering unit 19 is electrically connected to the second current limiting element 12, and the filtering unit 19 is configured to filter the electrical signal generated by the dc power supply 14. The electrical signals generated by the driving circuit 1 may include two types, which are a first electrical signal and a second electrical signal, respectively, and directions of the first electrical signal and the second electrical signal are different, and the isolation unit 18 may be configured to avoid mutual influence between the first electrical signal and the second electrical signal.
Optionally, the filtering unit 19 includes a filter capacitor 191, a fourth resistor 192, and a diode 193, one end of the filter capacitor 191 is connected to one end of the second current limiting element 12 and one end of the fourth resistor 192, and the other end of the filter capacitor 191 is connected to the second dc power supply 142 and the other end of the fourth resistor 192. A cathode of the diode 193 is connected to one end of the fourth resistor 192 and the isolation unit 18, and an anode of the diode 193 is connected to the other end of the fourth resistor 192.
Optionally, the amplifying unit 17 includes a second power supply 171, a fifth resistor 172, a sixth resistor 173, a seventh resistor 174, and a transistor 175. One end of the fifth resistor 172 is connected to the second power supply voltage 171, the other end of the fifth resistor 172 is connected to the isolation unit 18, a collector of the triode 175 is connected to the isolation unit 18, an emitter of the triode 175 is electrically connected to one end of the sixth resistor 173 and grounded, a base of the triode 175 is electrically connected to the other end of the sixth resistor 173 and one end of the seventh resistor 174, and the other end of the seventh resistor 174 is an input end of the circuit control signal 20. The isolation unit 18 may be a conventional optical coupler isolation circuit, which is not described in detail in this embodiment.
Optionally, when the circuit control signal 20 is a high-level control signal, the electrical signal of the driving circuit 1 flows into the isolation unit 18 through the amplification unit 17 and flows out of the isolation unit 18, and the first supply voltage 181 of the isolation unit 18 is the input voltage of the second current limiting element 12. When the input voltage of the second current limiting element 12 is the supply voltage of the isolation unit 18, the first current limiting element 11 is short-circuited by the regulating circuit 13, the input voltage is converted into the driving voltage by the second current limiting element 12, and when the time when the first current limiting element 11 is short-circuited satisfies a preset condition, the regulating circuit 13 is disconnected, and the input voltage is converted into the driving voltage by the first current limiting element 11 and the second current limiting element 12. The preset condition is related to the third current limiting unit 133 and the energy storage element 132 in the adjusting circuit 13, when the third current limiting unit 133 is the third resistor, the energy storage element 132 is the electrolytic capacitor, and the preset condition may be a time constant, where the time constant is related to values of the third resistor and the electrolytic capacitor.
As can be seen from the above description, the driving circuit 1 of the present embodiment includes a first current limiting element 11 and a second current limiting element 12 connected in series; a regulating circuit 13, wherein the regulating circuit 13 is electrically connected to the first current limiting element 11, when the input voltage is greater than a first voltage, the regulating circuit 13 is turned on to short-circuit the first current limiting element 11 by the regulating circuit 13, the input voltage is converted into the driving voltage by the second current limiting element 12, when a time when the first current limiting element 11 is short-circuited satisfies a preset condition, the regulating circuit 13 is turned off, and the input voltage is converted into the driving voltage by the first current limiting element 11 and the second current limiting element 12. Therefore, when the driven device needs to be turned on, that is, the input voltage is greater than the first voltage, the driving circuit 1 converts the input voltage into the driving voltage only through the first current limiting element 11, so that a larger driving current can be provided to meet the turn-on requirement of the driven device. After the driven device is turned on, that is, when the time for which the first current limiting element 11 is short-circuited satisfies the preset condition, the first current limiting element 11 and the second current limiting element 12 jointly convert the input voltage into the driving voltage, and at this time, the driving current is small, so that the circuit loss can be reduced, and the circuit efficiency can be improved.
The utility model provides a controllable circuit 300. In an embodiment of the present invention, referring to fig. 5, the controllable circuit includes a control circuit 2, a main circuit 3, and a driving circuit 1 shown in fig. 1. In a specific application, the control circuit 2 is electrically connected to the main circuit 3 through the driving circuit 1, so as to reduce the loss of the controllable circuit 300 and improve the efficiency of the controllable circuit 300.
The utility model provides an outer machine system of air conditioner. In an embodiment of the present invention, the air conditioner external unit system includes a driving circuit shown in fig. 1. In specific application, the driving circuit is arranged in the air conditioner external unit system, so that the circuit loss of the air conditioner external unit system is reduced, and the circuit efficiency of the air conditioner external unit system is improved.
To sum up, the driving circuit of one or more embodiments of the present invention can reduce circuit loss and improve circuit efficiency, thereby effectively overcoming various disadvantages in the prior art and having high industrial utility value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.
Claims (10)
1. A driving circuit for converting an input voltage to a driving voltage, comprising:
a first current limiting element and a second current limiting element connected in series with each other;
the regulating circuit is electrically connected with the first current limiting element, when the input voltage is larger than a first voltage, the regulating circuit is conducted to enable the first current limiting element to be short-circuited by the regulating circuit, the input voltage is converted into the driving voltage by the second current limiting element, when the short-circuited time of the first current limiting element meets a preset condition, the regulating circuit is disconnected, and the input voltage is converted into the driving voltage by the first current limiting element and the second current limiting element.
2. The driving circuit according to claim 1, wherein the adjusting circuit comprises:
the voltage-controlled switch and the energy storage element, two connecting ends of the voltage-controlled switch are respectively connected with two ends of the first current-limiting element, and two ends of the energy storage element are respectively connected with the input end of the driving circuit and the control end of the voltage-controlled switch.
3. The driving circuit according to claim 2, wherein the first end of the first current limiting element is connected to the second current limiting element, and the second end of the first current limiting element is connected to a dc power supply, and the driving circuit further comprises a third current limiting unit, and two ends of the third current limiting unit are respectively connected to the dc power supply and the control end of the voltage-controlled switch.
4. The driving circuit of claim 3, wherein the voltage-controlled switch is an N-channel depletion mode FET, two connection terminals of the voltage-controlled switch are respectively a source of the N-channel depletion mode FET and a drain of the N-channel depletion mode FET, the drain is electrically connected to a second terminal of the first current-limiting element and one terminal of the second current-limiting element, the source is electrically connected to a first terminal of the first current-limiting element and one terminal of the third current-limiting unit, a control terminal of the voltage-controlled switch is a gate of the N-channel depletion mode FET, and the gate is electrically connected to the other terminal of the third current-limiting unit and one terminal of the energy-storing element.
5. The driving circuit according to claim 4, further comprising a heat sensitive element electrically connected to the DC power source, the heat sensitive element being configured to protect the driving circuit.
6. The driving circuit according to claim 5, further comprising a thyristor, an anode of the thyristor being electrically connected to one end of the first current limiting element and one end of the thermistor, a cathode of the thyristor being electrically connected to the other end of the thermistor, the thermistor being short-circuited when the thyristor is turned on.
7. The driving circuit according to claim 6, wherein the DC power supply includes a first DC power supply and a second DC power supply, the first DC power supply is electrically connected to one end of the thermistor and the anode of the thyristor, respectively, and the second DC power supply is electrically connected to the other end of the thermistor and the cathode of the thyristor, respectively.
8. The driving circuit according to claim 7, wherein the driving circuit includes an amplifying unit, an isolating unit and a filtering unit, the amplifying unit is configured to send an amplified electrical signal to the isolating unit to turn on the isolating unit, the isolating unit is electrically connected to the filtering unit, the isolating unit is configured to realize unidirectional transmission of the electrical signal generated by the driving circuit, the filtering unit is electrically connected to the second current limiting element, and the filtering unit is configured to filter the electrical signal generated by the dc power supply.
9. A controllable circuit comprising a control circuit, a main circuit and a drive circuit as claimed in any one of claims 1 to 8, said control circuit being electrically connected to said main circuit via said drive circuit.
10. An outdoor unit system for an air conditioner, comprising the drive circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222122578.7U CN218006106U (en) | 2022-08-12 | 2022-08-12 | Driving circuit, controllable circuit and air conditioner external unit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222122578.7U CN218006106U (en) | 2022-08-12 | 2022-08-12 | Driving circuit, controllable circuit and air conditioner external unit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218006106U true CN218006106U (en) | 2022-12-09 |
Family
ID=84320807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222122578.7U Active CN218006106U (en) | 2022-08-12 | 2022-08-12 | Driving circuit, controllable circuit and air conditioner external unit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218006106U (en) |
-
2022
- 2022-08-12 CN CN202222122578.7U patent/CN218006106U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9553576B2 (en) | Driving circuit for IGBT module | |
| EP3817232B1 (en) | Nmos switch driving circuit and power supply device | |
| CN102005731A (en) | Controller, power converter and method for providing over-temperature protection | |
| CN212210475U (en) | Overcurrent and overvoltage self-locking protection circuit | |
| CN211123821U (en) | Linear voltage stabilizing circuit applied to ammeter and terminal | |
| CN218006106U (en) | Driving circuit, controllable circuit and air conditioner external unit system | |
| CN111130321A (en) | Single-power-supply negative-voltage power switch tube driving circuit | |
| CN214337789U (en) | Direct-current low-side driving switch circuit with short circuit and overload protection functions | |
| CN205320053U (en) | Quick break -make direct current solid state relay | |
| CN113162011A (en) | Overvoltage protection circuit and power supply circuit | |
| CN207559965U (en) | A kind of DC solid-state relay rapidly switched off | |
| CN220066868U (en) | Overvoltage protection circuit and system | |
| CN111987703A (en) | MOS pipe current-limiting protection circuit among direct current circuit | |
| CN110445360A (en) | DC power supply charging circuit and DC power supply charging equipment | |
| CN215498909U (en) | Transistor output driving circuit | |
| CN110601512A (en) | Discrete high-side driving circuit system | |
| CN214674887U (en) | Positive and negative power supply circuit based on IGBT single tube driving | |
| CN211480923U (en) | Overcurrent and short-circuit protection circuit for direct current output | |
| CN217848950U (en) | Intelligent current-limiting circuit | |
| CN215581093U (en) | Push-pull type driving device | |
| EP1081837A1 (en) | Power supply circuit | |
| CN214100844U (en) | Direct current load short circuit protection circuit | |
| CN214707134U (en) | Overvoltage protection circuit, overvoltage protection device and electronic equipment | |
| CN219144998U (en) | Short-circuit protection circuit and switching power supply | |
| CN209976847U (en) | Isolated DC fan driving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |