CN114362547A - Relay power supply circuit, microwave sensor circuit and working method thereof - Google Patents
Relay power supply circuit, microwave sensor circuit and working method thereof Download PDFInfo
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Abstract
The invention provides a relay power supply circuit, a microwave sensor circuit and a working method thereof, wherein a relay control circuit of the relay power supply circuit comprises a relay switch and a first NPN triode, the emitter of the first NPN triode is grounded, the collector of the first NPN triode is electrically connected with the base of the first PNP triode, the emitter and the base of the first PNP triode are electrically connected with the first electromagnetic end of the relay switch, the second electromagnetic end of the relay switch is electrically connected with the first voltage end, the emitter and the base of the second PNP triode are electrically connected with the first voltage end, the base of the second PNP triode is also electrically connected with the collector of the second NPN triode, the collector of the second PNP triode and the collector of the first PNP triode are electrically connected with the second voltage end, and the emitter of the second NPN triode is grounded. The relay power supply circuit can reduce power consumption and guarantee stability.
Description
Technical Field
The invention relates to the technical field of relay control, in particular to a relay power supply circuit, a microwave sensor circuit applying the relay power supply circuit and a working method of the microwave sensor circuit.
Background
In the application of the microwave sensor, a relay is used to control a load in a certain proportion of microwave sensors, however, the power supply voltage of the existing relay is different from the power supply voltage of other circuits of the microwave sensor, for example, the power supply voltage of the relay is 32V, and the power supply voltage of other circuits of the microwave sensor is 8V, so that the power supply circuit needs to provide different voltages for power supply by using different voltage reduction circuits. However, when the relay is turned off, the power circuit continues to supply 32V, resulting in increased power consumption.
Considering the requirement of low power consumption of the microwave sensor, whether the low power consumption technology can be applied to the aspect of circuit design is very critical.
Disclosure of Invention
A first object of the present invention is to provide a relay power supply circuit that reduces power consumption and ensures stability.
A second object of the present invention is to provide a microwave sensor circuit that reduces power consumption and ensures stability.
A third object of the present invention is to provide a method of operating a microwave sensor circuit that reduces power consumption and ensures stability.
In order to achieve the main purpose, the relay power supply circuit provided by the invention comprises a power supply circuit and a relay control circuit, wherein the power supply circuit is electrically connected with the relay control circuit; the power supply circuit comprises a power supply input circuit and a voltage reduction circuit, and the power supply input circuit is electrically connected with the voltage reduction circuit; the voltage reduction circuit comprises a first voltage-regulator tube, a second voltage-regulator tube, a first tantalum capacitor, a second tantalum capacitor, a first voltage end and a second voltage end, wherein the negative electrode of the first voltage-regulator tube is electrically connected with the power input circuit, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the second voltage-regulator tube, the positive electrode of the second voltage-regulator tube is grounded, the positive electrode of the first tantalum capacitor is electrically connected with the negative electrode of the first voltage-regulator tube, the negative electrode of the first tantalum capacitor is electrically connected with the positive electrode of the second tantalum capacitor, the negative electrode of the second tantalum capacitor is grounded, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the first tantalum capacitor, a branch between the positive electrode of the first tantalum capacitor and the negative electrode of the first voltage-regulator tube is electrically connected with the first voltage end, a branch between the negative electrode of the first tantalum capacitor and the positive electrode of the second tantalum capacitor is electrically connected with the second voltage end, and the voltage of the first voltage end is higher than the second voltage end; the relay control circuit comprises a relay switch, a first control end, a second control end, a first NPN triode, a first PNP triode, a second PNP triode and a second NPN triode, wherein the first control end is electrically connected with the base electrode of the first NPN triode, the emitting electrode of the first NPN triode is grounded, the collecting electrode of the first NPN triode is electrically connected with the base electrode of the first PNP triode, the emitting electrode and the base electrode of the first PNP triode are electrically connected with the first electromagnetic end of the relay switch, the second electromagnetic end of the relay switch is electrically connected with the first voltage end, the emitting electrode and the base electrode of the second PNP triode are electrically connected with the first voltage end, the base electrode of the second PNP triode is also electrically connected with the collecting electrode of the second NPN triode, the collecting electrode of the second PNP triode and the collecting electrode of the first NPN triode are electrically connected with the second voltage end, and the base electrode of the second NPN triode is electrically connected with the second control end, the emitter of the second NPN triode is grounded.
According to the scheme, the relay power supply circuit controls the relay switch through the different voltages of the first voltage end and the second voltage end of the voltage reduction circuit, meanwhile, the first NPN triode, the first PNP triode, the second PNP triode and the second NPN triode are matched to control the relay switch, when the relay switch is disconnected, the second PNP triode is controlled to be connected, the first voltage end and the second voltage end are in short circuit, the first voltage stabilizing tube is in short circuit, only the second voltage end is left for supplying power, the power consumption reducing effect can be achieved, meanwhile, when the relay switch needs to be closed, the second PNP triode can be controlled to be cut off, the relay switch is controlled to be closed through the first NPN triode and the first PNP triode after the voltage of the first voltage end is stabilized, and therefore the stability of the power supply voltage of the relay switch can be guaranteed.
In a further scheme, a diode is further arranged between the first electromagnetic end and the second electromagnetic end, the anode of the diode is electrically connected with the first electromagnetic end, and the cathode of the diode is electrically connected with the second electromagnetic end.
Therefore, the first electromagnetic end and the second electromagnetic end are provided with diodes to prevent the current from flowing reversely.
In a further scheme, the power input circuit comprises an alternating current input end and a rectifying circuit, the alternating current input end is electrically connected with the rectifying circuit, and the rectifying circuit is electrically connected with the voltage reduction circuit.
According to the scheme, the power supply circuit can be connected to the alternating current commercial power by utilizing the alternating current input end and the rectifying circuit, and the applicability of the circuit is improved.
In order to achieve the second object, the microwave sensor circuit provided by the invention comprises a main control circuit, a relay power supply circuit, a power line and a microwave sensor, wherein the main control circuit is electrically connected with the control end of the relay power supply circuit, and the power line is electrically connected with the microwave sensor through the relay power supply circuit; the relay power supply circuit comprises a power supply circuit and a relay control circuit, and the power supply circuit is electrically connected with the relay control circuit; the power supply circuit comprises a power supply input circuit and a voltage reduction circuit, and the power supply input circuit is electrically connected with the voltage reduction circuit; the voltage reduction circuit comprises a first voltage-regulator tube, a second voltage-regulator tube, a first tantalum capacitor, a second tantalum capacitor, a first voltage end and a second voltage end, wherein the negative electrode of the first voltage-regulator tube is electrically connected with the power input circuit, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the second voltage-regulator tube, the positive electrode of the second voltage-regulator tube is grounded, the positive electrode of the first tantalum capacitor is electrically connected with the negative electrode of the first voltage-regulator tube, the negative electrode of the first tantalum capacitor is electrically connected with the positive electrode of the second tantalum capacitor, the negative electrode of the second tantalum capacitor is grounded, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the first tantalum capacitor, a branch between the positive electrode of the first tantalum capacitor and the negative electrode of the first voltage-regulator tube is electrically connected with the first voltage end, a branch between the negative electrode of the first tantalum capacitor and the positive electrode of the second tantalum capacitor is electrically connected with the second voltage end, and the voltage of the first voltage end is higher than the second voltage end; the relay control circuit comprises a relay switch, a first control end, a second control end, a first NPN triode, a first PNP triode, a second PNP triode and a second NPN triode, wherein the first control end is electrically connected with the base electrode of the first NPN triode, the emitting electrode of the first NPN triode is grounded, the collecting electrode of the first NPN triode is electrically connected with the base electrode of the first PNP triode, the emitting electrode and the base electrode of the first PNP triode are electrically connected with the first electromagnetic end of the relay switch, the second electromagnetic end of the relay switch is electrically connected with the first voltage end, the emitting electrode and the base electrode of the second PNP triode are electrically connected with the first voltage end, the base electrode of the second PNP triode is also electrically connected with the collecting electrode of the second NPN triode, the collecting electrode of the second PNP triode and the collecting electrode of the first NPN triode are electrically connected with the second voltage end, and the base electrode of the second NPN triode is electrically connected with the second control end, the emitter of the second NPN triode is grounded.
According to the scheme, in the microwave sensor circuit, the relay power supply circuit controls the relay switch through different voltages of the first voltage end and the second voltage end of the voltage reduction circuit, meanwhile, the first NPN triode, the first PNP triode, the second PNP triode and the second NPN triode are matched, the second PNP triode can be controlled to be conducted when the relay switch is disconnected, the first voltage end and the second voltage end are in short circuit, the first voltage regulator tube is in short circuit, power is supplied only through the second voltage end, the effect of reducing power consumption can be achieved, meanwhile, when the relay switch needs to be closed, the second PNP triode can be controlled to be cut off, the relay switch is controlled to be closed through the first NPN triode and the first PNP triode after the voltage of the first voltage end is stabilized, and therefore the stability of the power supply voltage of the relay switch can be guaranteed.
In a further scheme, a diode is further arranged between the first electromagnetic end and the second electromagnetic end, the anode of the diode is electrically connected with the first electromagnetic end, and the cathode of the diode is electrically connected with the second electromagnetic end.
Therefore, the first electromagnetic end and the second electromagnetic end are provided with diodes to prevent the current from flowing reversely.
In a further scheme, the power input circuit comprises an alternating current input end and a rectifying circuit, the alternating current input end is electrically connected with the rectifying circuit, and the rectifying circuit is electrically connected with the voltage reduction circuit.
According to the scheme, the power supply circuit can be connected to the alternating current commercial power by utilizing the alternating current input end and the rectifying circuit, and the applicability of the circuit is improved.
In order to achieve the third object, the present invention provides a method for operating a microwave sensor circuit, including: under the relay switch on state, when the relay switch needs to break, main control circuit sends the low level to first control end, sends the high level to the second control end behind the disconnection relay switch.
Therefore, when the relay switch needs to be disconnected, the main control circuit sends a low level to the first control end to control the second PNP triode to be conducted, the first voltage end and the second voltage end are in short circuit, the first voltage-stabilizing tube is in short circuit, and only the second voltage end is left for supplying power, so that the effect of reducing power consumption can be achieved.
In a further aspect, the method further comprises: when the relay switch is required to be closed in the off state of the relay switch, the master control circuit sends a low level preset time to the second control end and then sends a high level to the first control end.
Therefore, when the relay switch needs to be closed, the second PNP triode can be controlled to be stopped, the master control circuit sends a low level to the second control end for a preset time period and then sends a high level to the first control end, the relay switch is controlled to be closed through the first NPN triode and the first PNP triode, the relay switch is controlled to be closed after the voltage of the first voltage end is stabilized, and therefore the stability of the power supply voltage of the relay switch can be guaranteed.
Drawings
FIG. 1 is a schematic block circuit diagram of an embodiment of a microwave sensor circuit of the present invention.
Fig. 2 is a circuit schematic of a power supply circuit in an embodiment of the microwave sensor circuit of the present invention.
Fig. 3 is a circuit schematic of a relay control circuit in an embodiment of a microwave sensor circuit of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
As shown in fig. 1, in this embodiment, the microwave sensor circuit includes a main control circuit 1, a relay power supply circuit 2, a power line 3, and a microwave sensor 4, where the main control circuit 1 is electrically connected to a control end of the relay power supply circuit 2, and the power line 3 is electrically connected to the microwave sensor 4 through the relay power supply circuit 2. Wherein, relay power supply circuit 2 includes power supply circuit and relay control circuit, and power supply circuit is connected with relay control circuit electricity.
In the present embodiment, referring to fig. 2, the power supply circuit includes a power supply input circuit 21 and a voltage step-down circuit 22, and the power supply input circuit 21 is electrically connected to the voltage step-down circuit 22. The power input circuit 21 includes an ac input terminal 211 and a rectifier circuit U1, the ac input terminal 211 being electrically connected to the rectifier circuit U1, and the rectifier circuit U1 being electrically connected to the step-down circuit 22.
The voltage reduction circuit 22 comprises a first voltage regulator tube ZD1, a second voltage regulator tube ZD2, a first tantalum capacitor EC1, a second tantalum capacitor EC2, a first voltage end 221 and a second voltage end 222, wherein the negative electrode of the first voltage regulator tube ZD1 is electrically connected with the power input circuit 21, the positive electrode of the first voltage regulator tube ZD1 is electrically connected with the negative electrode of the second voltage regulator tube ZD2, the positive electrode of the second voltage regulator tube ZD2 is grounded, the positive electrode of the first tantalum capacitor EC1 is electrically connected with the negative electrode of the first voltage regulator tube ZD1, the negative electrode of the first tantalum capacitor EC1 is electrically connected with the positive electrode of the second tantalum capacitor EC2, the negative electrode of the second tantalum capacitor EC2 is grounded, the positive electrode of the first voltage regulator tube EC1 is electrically connected with the negative electrode of the first tantalum capacitor EC1, a branch between the positive electrode of the first tantalum capacitor EC1 and the negative electrode of the first voltage regulator tube ZD1 is electrically connected with the first voltage end 221, and a branch of the negative electrode of the second tantalum capacitor EC1 are electrically connected with the second voltage end 222, the voltage of the first voltage terminal 221 is greater than the voltage of the second voltage terminal 222. In this embodiment, the voltage of the first voltage terminal 221 is +32V, and the voltage of the second voltage terminal 222 is + 8V.
The relay control circuit comprises a relay switch K1, a first control terminal control1, a second control terminal control2, a first NPN triode Q1, a first PNP triode Q2, a second PNP triode Q3 and a second NPN triode Q4, wherein the first control terminal control1 and the second control terminal control2 are electrically connected with the main control circuit 1, the first control terminal control1 is electrically connected with the base of the first NPN triode Q1 through a resistor R1, the base of the first NPN triode Q1 is electrically connected with the emitter of the first NPN triode Q1 through a capacitor C1, the emitter of the first NPN triode Q1 is grounded, the collector of the first NPN triode Q1 is electrically connected with the base of the first PNP triode Q2 through a resistor R2, the emitter and the base of the first PNP triode Q2 are electrically connected with the first electromagnetic terminal of the relay switch K1, the base of the first emitter Q2 and the base of the first PNP triode Q3 are electrically connected with the electromagnetic voltage of the relay switch K1 through a resistor R3957, an emitter and a base of the second PNP transistor Q3 are electrically connected to the first voltage terminal 221, an emitter and a base of the second PNP transistor Q3 are electrically connected to each other through a resistor R4, a base of the second PNP transistor Q3 is also electrically connected to a collector of the second NPN transistor Q3 through a resistor R5, a collector of the second PNP transistor Q3 and a collector of the first PNP transistor Q2 are electrically connected to the second voltage terminal 222, a base of the second NPN transistor Q4 is electrically connected to the second control terminal control2 through a resistor R6, an emitter of the second NPN transistor Q4 is grounded, and a base of the second NPN transistor Q4 and an emitter of the second NPN transistor Q4 are electrically connected to each other through a capacitor C2.
In addition, a diode D1 is arranged between the first electromagnetic end and the second electromagnetic end of the relay switch K1, the anode of the diode D1 is electrically connected with the first electromagnetic end, and the cathode of the diode D1 is electrically connected with the second electromagnetic end.
For a more clear illustration of the present invention, the operation of the microwave sensor circuit of the present application will be described in detail below.
In this embodiment, when the microwave sensor circuit is in an operating state, the relay switch K1 is in a closed state, and when the relay switch K1 needs to be opened, the main control circuit 1 sends a low level to the first control terminal control1, and sends a high level to the second control terminal control2 after the relay switch K1 is opened. First, the relay switch K1 is turned off by controlling the first control terminal control1 to be at a low level, so that the first NPN transistor Q1 and the first PNP transistor Q2 are in an off state. Then, the high level of the second control terminal control2 is controlled, so that the second PNP transistor Q3 and the second NPN transistor Q4 enter a saturation state, that is, the emitter and the collector of the second NPN transistor Q4 are equivalent to a short circuit, so the base of the second PNP transistor Q3 is at a low level, and at this time, the emitter of the second PNP transistor Q3 is at a high level, so the second PNP transistor Q3 also enters a saturation state, at this time, the first voltage terminal 221 and the second voltage terminal 222 are short-circuited by the second PNP transistor Q3, so that the first voltage regulator ZD1 is short-circuited, and the circuit only has the second voltage terminal 222 for supplying power to the main control circuit 1 and other circuits, and the first voltage terminal 221 is powered off, so that the power consumption can be significantly reduced.
When the relay switch K1 is in the off state and the relay switch K1 needs to be closed, the main control circuit 1 sends a low level to the second control terminal control2 for a preset time period, and then sends a high level to the first control terminal control 1. The preset duration can be preset according to experimental data. By firstly controlling the second control terminal control2 to be at a low level, and then the second NPN triode Q4 enters a cut-off state, so that the base and emitter levels of the second PNP triode Q3 are the same, so that the second PNP triode Q3 also enters a cut-off state, and under the action of the first tantalum capacitor EC1, the level of the first control terminal control1 is raised, after several tens of milliseconds are stabilized, and after the voltage of the first voltage terminal 221 is stabilized, a high level is sent to the first control terminal control1, so that the first NPN triode Q1 and the first PNP triode Q2 are turned on, thereby closing the relay switch K1, and by this control manner, when closing the relay switch K1, the stability of control can be improved.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (8)
1. The relay power supply circuit is characterized by comprising a power supply circuit and a relay control circuit, wherein the power supply circuit is electrically connected with the relay control circuit;
the power supply circuit comprises a power supply input circuit and a voltage reduction circuit, and the power supply input circuit is electrically connected with the voltage reduction circuit;
the voltage reduction circuit comprises a first voltage-regulator tube, a second voltage-regulator tube, a first tantalum capacitor, a second tantalum capacitor, a first voltage end and a second voltage end, wherein the negative electrode of the first voltage-regulator tube is electrically connected with the power input circuit, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the second voltage-regulator tube, the positive electrode of the second voltage-regulator tube is grounded, the positive electrode of the first tantalum capacitor is electrically connected with the negative electrode of the first voltage-regulator tube, the negative electrode of the first tantalum capacitor is electrically connected with the positive electrode of the second tantalum capacitor, the negative electrode of the second tantalum capacitor is grounded, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the first tantalum capacitor, a branch between the positive electrode of the first tantalum capacitor and the negative electrode of the first voltage-regulator tube is electrically connected with the first voltage end, and a branch between the negative electrode of the first tantalum capacitor and the positive electrode of the second tantalum capacitor is electrically connected with the second voltage end, the voltage of the first voltage end is greater than the voltage of the second voltage end;
the relay control circuit comprises a relay switch, a first control end, a second control end, a first NPN triode, a first PNP triode, a second PNP triode and a second NPN triode, wherein the first control end is electrically connected with the base electrode of the first NPN triode, the emitting electrode of the first NPN triode is grounded, the collecting electrode of the first NPN triode is electrically connected with the base electrode of the first PNP triode, the emitting electrode and the base electrode of the first PNP triode are both electrically connected with the first electromagnetic end of the relay switch, the second electromagnetic end of the relay switch is electrically connected with the first voltage end, the emitting electrode and the base electrode of the second PNP triode are both electrically connected with the first voltage end, the base electrode of the second PNP triode is also electrically connected with the collecting electrode of the second NPN triode, and the collecting electrode of the second PNP triode and the collecting electrode of the first PNP triode are both electrically connected with the second voltage end, the base electrode of the second NPN triode is electrically connected with the second control end, and the emitting electrode of the second NPN triode is grounded.
2. Relay supply circuit according to claim 1,
a diode is further arranged between the first electromagnetic end and the second electromagnetic end, the anode of the diode is electrically connected with the first electromagnetic end, and the cathode of the diode is electrically connected with the second electromagnetic end.
3. Relay supply circuit according to claim 1 or 2,
the power input circuit comprises an alternating current input end and a rectifying circuit, the alternating current input end is electrically connected with the rectifying circuit, and the rectifying circuit is electrically connected with the voltage reduction circuit.
4. A microwave sensor circuit comprises a main control circuit, a relay power supply circuit, a power line and a microwave sensor, wherein the main control circuit is electrically connected with the control end of the relay power supply circuit, and the power line is electrically connected with the microwave sensor through the relay power supply circuit; it is characterized in that the preparation method is characterized in that,
the relay power supply circuit comprises a power supply circuit and a relay control circuit, and the power supply circuit is electrically connected with the relay control circuit;
the power supply circuit comprises a power supply input circuit and a voltage reduction circuit, and the power supply input circuit is electrically connected with the voltage reduction circuit;
the voltage reduction circuit comprises a first voltage-regulator tube, a second voltage-regulator tube, a first tantalum capacitor, a second tantalum capacitor, a first voltage end and a second voltage end, wherein the negative electrode of the first voltage-regulator tube is electrically connected with the power input circuit, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the second voltage-regulator tube, the positive electrode of the second voltage-regulator tube is grounded, the positive electrode of the first tantalum capacitor is electrically connected with the negative electrode of the first voltage-regulator tube, the negative electrode of the first tantalum capacitor is electrically connected with the positive electrode of the second tantalum capacitor, the negative electrode of the second tantalum capacitor is grounded, the positive electrode of the first voltage-regulator tube is electrically connected with the negative electrode of the first tantalum capacitor, a branch between the positive electrode of the first tantalum capacitor and the negative electrode of the first voltage-regulator tube is electrically connected with the first voltage end, and a branch between the negative electrode of the first tantalum capacitor and the positive electrode of the second tantalum capacitor is electrically connected with the second voltage end, the voltage of the first voltage end is greater than the voltage of the second voltage end;
the relay control circuit comprises a relay switch, a first control end, a second control end, a first NPN triode, a first PNP triode, a second PNP triode and a second NPN triode, wherein the first control end is electrically connected with the base electrode of the first NPN triode, the emitting electrode of the first NPN triode is grounded, the collecting electrode of the first NPN triode is electrically connected with the base electrode of the first PNP triode, the emitting electrode and the base electrode of the first PNP triode are both electrically connected with the first electromagnetic end of the relay switch, the second electromagnetic end of the relay switch is electrically connected with the first voltage end, the emitting electrode and the base electrode of the second PNP triode are both electrically connected with the first voltage end, the base electrode of the second PNP triode is also electrically connected with the collecting electrode of the second NPN triode, and the collecting electrode of the second PNP triode and the collecting electrode of the first PNP triode are both electrically connected with the second voltage end, the base electrode of the second NPN triode is electrically connected with the second control end, and the emitting electrode of the second NPN triode is grounded.
5. A microwave sensor circuit in accordance with claim 4,
a diode is further arranged between the first electromagnetic end and the second electromagnetic end, the anode of the diode is electrically connected with the first electromagnetic end, and the cathode of the diode is electrically connected with the second electromagnetic end.
6. Microwave sensor circuit according to claim 4 or 5,
the power input circuit comprises an alternating current input end and a rectifying circuit, the alternating current input end is electrically connected with the rectifying circuit, and the rectifying circuit is electrically connected with the voltage reduction circuit.
7. A method of operating a microwave sensor circuit, for use in a microwave sensor circuit according to claim 4,
the method comprises the following steps:
and when the relay switch needs to be disconnected in the closed state of the relay switch, the main control circuit sends a low level to the first control end, and sends a high level to the second control end after the relay switch is disconnected.
8. A method of operating a microwave sensor circuit according to claim 7,
the method further comprises the following steps:
and in the off state of the relay switch, when the relay switch needs to be closed, the main control circuit sends a low level preset time to the second control end and then sends a high level to the first control end.
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| CN203743576U (en) * | 2013-12-24 | 2014-07-30 | 深圳麦格米特电气股份有限公司 | Switching-valve control circuit of constant-temperature gas water heater |
| CN204558367U (en) * | 2015-04-14 | 2015-08-12 | 杭州西力电能表制造有限公司 | A kind ofly drive stable control relay circuit |
| CN206506313U (en) * | 2016-12-30 | 2017-09-19 | 广东金莱特电器股份有限公司 | A kind of heavy-current discharge protects lead-acid battery circuit |
| WO2019161709A1 (en) * | 2018-02-26 | 2019-08-29 | 广州金升阳科技有限公司 | Starting circuit with ultralow input voltage |
| CN207781491U (en) * | 2018-02-27 | 2018-08-28 | 厦门芯阳科技股份有限公司 | A kind of high security switch control relay drive circuit |
| CN212659489U (en) * | 2020-07-23 | 2021-03-05 | 重庆川仪自动化股份有限公司 | Control circuit for driving relay to be switched on and off rapidly |
| CN111836422A (en) * | 2020-08-13 | 2020-10-27 | 珠海雷特科技股份有限公司 | DALI driver applicable to SUTCCHI standard shell and capable of adjusting multi-gear current |
| CN213304962U (en) * | 2020-10-30 | 2021-05-28 | 珠海雷特科技股份有限公司 | DALI signal power supply protection circuit |
| CN112751410A (en) * | 2020-12-28 | 2021-05-04 | 国家电网有限公司 | Power supply control circuit of low-voltage direct-current circuit |
| CN214477203U (en) * | 2021-01-07 | 2021-10-22 | 深圳和而泰智能控制股份有限公司 | Relay control circuit and electrical equipment |
| CN113644902A (en) * | 2021-06-30 | 2021-11-12 | 华润微集成电路(无锡)有限公司 | Light MOS solid state relay |
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| CN114362547B (en) | 2023-12-29 |
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