CN110401360B - Passive signal output system - Google Patents
Passive signal output system Download PDFInfo
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- CN110401360B CN110401360B CN201910746663.0A CN201910746663A CN110401360B CN 110401360 B CN110401360 B CN 110401360B CN 201910746663 A CN201910746663 A CN 201910746663A CN 110401360 B CN110401360 B CN 110401360B
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- diode
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- electrolytic capacitor
- resistor
- filter circuit
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 32
- 239000003990 capacitor Substances 0.000 claims description 106
- 230000005669 field effect Effects 0.000 claims description 25
- 238000001914 filtration Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/062—Avoiding or suppressing excessive transient voltages or currents
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Electronic Switches (AREA)
Abstract
The invention provides a passive signal output system which comprises a rectification module, a first filter circuit, a voltage stabilizing module and a second filter circuit, wherein the rectification module is connected with the first filter circuit; the input end of the rectifying module is electrically connected with the voltage input end, the output end of the rectifying module is electrically connected with the input end of the first filter circuit, the output end of the first filter circuit is electrically connected with the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is electrically connected with the input end of the second filter circuit, the output end of the second filter circuit is connected with a relay, alternating current voltage is firstly changed into direct current power through the rectifying module, high-frequency noise is filtered by the first filter module and then enters the voltage stabilizing module, the voltage stabilizing module outputs stable direct current voltage, noise is filtered by the second filter circuit, the relay is finally connected with the relay, and the relay controls output voltage according to the input voltage signal, so that the stability of the output power is improved.
Description
Technical Field
The invention relates to the technical field of ground service guarantee, in particular to a passive signal output system.
Background
Aircraft service ground wells are mainly used to provide maintenance services to various aircraft in the hangar or on the tarmac. At present, a control system of an aircraft service ground well generally adopts a button switch and relay combination, and the prior art generally converts an output power supply into a required voltage based on a voltage converter or a transformer, and generally converts the voltage into 36V and 27V to be connected into the required control system, so that unstable operation of the control system due to unstable input voltage of the control system is easily caused, and the relay is easily damaged.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a passive signal output system which improves the output stability.
The aim of the invention is realized by the following technical scheme: a passive signal output system comprises a rectification module, a first filter circuit, a voltage stabilizing module and a second filter circuit;
The input end of the rectifying module is electrically connected with the voltage input end, the output end of the rectifying module is electrically connected with the input end of the first filter circuit, the output end of the first filter circuit is electrically connected with the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is electrically connected with the input end of the second filter circuit, and the output end of the second filter circuit is connected with a relay.
Through the technical means, the alternating voltage is changed into the direct current power supply through the rectifying module, the direct current power supply enters the voltage stabilizing module after high-frequency noise is filtered through the first filtering module, the voltage stabilizing module outputs stable direct current voltage, clutter is filtered through the second filtering circuit, and finally the direct current power supply is connected into the relay, and the relay controls output voltage according to the input voltage signal.
Preferably, the rectifying circuit includes a first diode, a second diode, a third diode, and a fourth diode;
The cathode of the first diode is connected with the cathode of the second diode, the anode of the second diode is connected with the cathode of the third diode, the anode of the third diode is connected with the anode of the fourth diode, and the cathode of the fourth diode is connected with the anode of the first diode;
The positive electrode of the first diode and the positive electrode of the fourth diode are connected with the positive electrode of the input voltage, and the positive electrode of the second diode and the negative electrode of the third diode are connected with the negative electrode of the input voltage.
Through the technical means, the bridge rectifier circuit is formed by four diodes, and full-wave rectification is realized through a simple circuit structure.
Preferably, the first filter circuit comprises a sixth electrolytic capacitor, a first capacitor, a second capacitor and a third capacitor;
The anode of the sixth electrolytic capacitor is connected with the cathode of the second diode, the cathode of the sixth electrolytic capacitor is connected with the anode of the third diode, the sixth electrolytic capacitor is connected with the first capacitor in parallel, and the first capacitor, the second capacitor and the third capacitor are connected in parallel.
Preferably, the voltage stabilizing module comprises an LM2576 three-terminal voltage stabilizing chip, a first pin of the LM2576 is connected with an anode of the sixth electrolytic capacitor, a sixth pin of the LM2576 is connected with a cathode of the sixth electrolytic capacitor, and a first capacitor is further connected between the first pin and the second pin of the LM 2576;
A second resistor is further connected between the second pin and the third pin of the LM2576, and a fifth resistor is further connected between the fourth pin and the fifth pin of the LM 2576.
Through the technical means, the LM2576 has reliable working performance, higher working efficiency and stronger output current driving capability, thereby being capable of providing a stable and reliable power supply for a power supply system.
Preferably, the second filter circuit comprises a seventh electrolytic capacitor, a third resistor and a fifth capacitor, wherein the positive electrode of the seventh electrolytic capacitor is connected with the third pin of the LM2576, the negative electrode of the seventh electrolytic capacitor is connected with one end of the third resistor, the other end of the third capacitor is connected with the positive electrode of the seventh electrolytic capacitor, and the seventh electrolytic capacitor is connected with the fifth capacitor in parallel;
The second filter circuit further comprises a ninth electrolytic capacitor, a fourth capacitor and a sixth resistor, wherein the positive electrode of the ninth electrolytic capacitor is connected with the fourth pin of the LM2576, the negative electrode of the ninth electrolytic capacitor is connected with the sixth pin of the LM2576, and the ninth electrolytic capacitor is connected with the fourth capacitor and the sixth resistor in parallel.
Preferably, the lithium ion battery further comprises an eighth electrolytic capacitor and a fourth resistor, wherein the positive electrode of the eighth electrolytic capacitor is connected with the negative electrode of the seventh electrolytic capacitor through the fourth resistor, and the two ends of the eighth electrolytic capacitor are also connected with a sixth capacitor in parallel.
Preferably, the LED further comprises a sixth LED, wherein the anode of the sixth LED is connected with the cathode of the seventh electrolytic capacitor, the cathode of the sixth LED is connected with one end of the relay, and the other end of the relay is connected with the cathode of the ninth electrolytic capacitor.
Preferably, the two ends of the relay are also reversely connected with a fifth diode in parallel.
Through the technical means, the fifth diode is connected in parallel and is used for preventing the sudden change of the inductance current at the moment of switching off of the switch so as to protect the circuit.
Preferably, the input end of the rectifying module is also connected with an overvoltage protection circuit.
Preferably, the overvoltage protection circuit comprises a triode, a field effect transistor, a seventh resistor, an eighth resistor and a seventh diode;
The emitter of the triode is connected with the S pole of the field effect tube, the collector of the triode is connected with the G pole of the field effect tube, the base of the triode is connected with one end of the eighth resistor, the other end of the eighth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the positive pole of a power supply, one end of the seventh resistor far away from the emitter of the triode is connected with the negative pole of the seventh diode, and the positive pole of the seventh diode is connected with the negative pole of the power supply;
An eighth diode is further connected in series between the S pole and the D pole of the field effect tube, the positive pole of the eighth diode is connected with the D pole of the field effect tube, the negative pole of the eighth diode is connected with the S pole of the field effect tube, a tenth resistor is further connected in series between the G pole of the field effect tube and the seventh diode, and a ninth resistor is further connected in series between the G pole of the field effect tube and the positive pole of the seventh diode.
The beneficial effects of the invention are as follows:
1. The invention comprises a rectifying module, a first filter circuit, a voltage stabilizing module and a second filter circuit; the input end of the rectifying module is electrically connected with the voltage input end, the output end of the rectifying module is electrically connected with the input end of the first filter circuit, the output end of the first filter circuit is electrically connected with the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is electrically connected with the input end of the second filter circuit, the output end of the second filter circuit is connected with a relay, the alternating voltage is firstly changed into a direct current power supply through the rectifying module, the direct current power supply enters the voltage stabilizing module after high-frequency noise is filtered through the first filter module, the stable direct current voltage is further filtered through the second filter circuit after being output by the voltage stabilizing module, and finally the noise is filtered through the second filter circuit, and finally the relay is connected with the relay to control the output voltage according to the input voltage signal;
2. the voltage stabilizing module comprises an LM2576 three-terminal voltage stabilizing chip, wherein a first pin of the LM2576 is connected with the positive electrode of a sixth electrolytic capacitor, a sixth pin of the LM2576 is connected with the negative electrode of the sixth electrolytic capacitor, and a first capacitor is further connected between the first pin and a second pin of the LM 2576; a second resistor is further connected between the second pin and the third pin of the LM2576, and a fifth resistor is further connected between the fourth pin and the fifth pin of the LM 2576. Through the technical means, the LM2576 has reliable working performance, higher working efficiency and stronger output current driving capability, and provides a stable and reliable power supply for a power supply system.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a block diagram of the overall circuit of the present application novel one embodiment;
Fig. 3 is a diagram showing a structure of a protection circuit according to the present invention.
Detailed Description
The technical scheme of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Example 1
As shown in FIG. 1, a passive signal output system comprises a rectification module, a first filter circuit, a voltage stabilizing module and a second filter circuit;
the input end of the rectifying module is electrically connected with the voltage input end, the output end of the rectifying module is electrically connected with the input end of the first filter circuit, the output end of the first filter circuit is electrically connected with the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is electrically connected with the input end of the second filter circuit, and the output end of the second filter circuit is connected with the relay. The alternating voltage is changed into a direct current power supply through the rectifying module, the direct current power supply enters the voltage stabilizing module after high-frequency noise is filtered through the first filtering module, the stable direct current voltage is output by the voltage stabilizing module, clutter is filtered through the second filtering circuit, and finally the direct current power supply is connected into the relay, and the relay controls output voltage according to the input voltage signal.
In specific implementation, as shown in fig. 1, the rectifying circuit includes a first diode, a second diode, a third diode, and a fourth diode; the cathode of the first diode is connected with the cathode of the second diode, the anode of the second diode is connected with the cathode of the third diode, the anode of the third diode is connected with the anode of the fourth diode, and the cathode of the fourth diode is connected with the anode of the first diode; the positive pole of the first diode and the negative pole of the fourth diode are both connected with the positive pole of the input voltage, and the positive pole of the second diode and the negative pole of the third diode are both connected with the negative pole of the input voltage. A bridge rectifier circuit is formed by four diodes, and full-wave rectification is realized by a simple circuit structure.
The first filter circuit comprises a sixth electrolytic capacitor, a first capacitor, a second capacitor and a third capacitor;
The positive electrode of the sixth electrolytic capacitor is connected with the negative electrode of the second diode, the negative electrode of the sixth electrolytic capacitor is connected with the positive electrode of the third diode, the sixth electrolytic capacitor is connected with the first capacitor in parallel, and the first capacitor, the second capacitor and the third capacitor are connected in parallel. The voltage stabilizing module comprises an LM2576 three-terminal voltage stabilizing chip, a first pin of the LM2576 is connected with the positive electrode of a sixth electrolytic capacitor, a sixth pin of the LM2576 is connected with the negative electrode of the sixth electrolytic capacitor, and a first capacitor is further connected between the first pin and the second pin of the LM 2576; a second resistor is further connected between the second pin and the third pin of the LM2576, and a fifth resistor is further connected between the fourth pin and the fifth pin of the LM 2576. The LM2576 has reliable working performance, higher working efficiency and stronger output current driving capability, thereby being capable of providing a stable and reliable power supply for a power supply system.
The second filter circuit comprises a seventh electrolytic capacitor, a third resistor and a fifth capacitor, wherein the positive electrode of the seventh electrolytic capacitor is connected with a third pin of the LM2576, the negative electrode of the seventh electrolytic capacitor is connected with one end of the third resistor, the other end of the third capacitor is connected with the positive electrode of the seventh electrolytic capacitor, and the seventh electrolytic capacitor is connected with the fifth capacitor in parallel; the second filter circuit further comprises a ninth electrolytic capacitor, a fourth capacitor and a sixth resistor, wherein the positive electrode of the ninth electrolytic capacitor is connected with the fourth pin of the LM2576, the negative electrode of the ninth electrolytic capacitor is connected with the sixth pin of the LM2576, and the ninth electrolytic capacitor, the fourth capacitor and the sixth resistor are mutually connected in parallel.
The positive electrode of the eighth electrolytic capacitor is connected with the negative electrode of the seventh electrolytic capacitor through the fourth resistor, and the two ends of the eighth electrolytic capacitor are also connected with a sixth capacitor in parallel. The LED further comprises a sixth LED, the anode of the sixth LED is connected with the cathode of the seventh electrolytic capacitor, the cathode of the sixth LED is connected with one end of the relay, and the other end of the relay is connected with the cathode of the ninth electrolytic capacitor.
And a fifth diode is connected in reverse parallel at two ends of the relay. The fifth diode is connected in parallel to prevent abrupt change of the inductor current at the moment of switching off the switch so as to protect the circuit.
The input end of the rectifying module is also connected with an overvoltage protection circuit, and the overvoltage protection circuit comprises a triode, a field effect transistor, a seventh resistor, an eighth resistor and a seventh diode; the emitter of the triode is connected with the S pole of the field effect tube, the collector of the triode is connected with the G pole of the field effect tube, the base of the triode is connected with one end of the eighth resistor, the other end of the eighth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the positive pole of the power supply, one end of the seventh resistor far away from the emitter of the triode is connected with the negative pole of the seventh diode, and the positive pole of the seventh diode is connected with the negative pole of the power supply;
An eighth diode is connected in series between the S pole and the D pole of the field effect tube, the positive pole of the eighth diode is connected with the D pole of the field effect tube, the negative pole of the eighth diode is connected with the S pole of the field effect tube, a tenth resistor is connected in series between the G pole of the field effect tube and the seventh diode, and a ninth resistor is connected in series between the G pole of the field effect tube and the positive pole of the seventh diode.
In specific implementation, as shown in fig. 3, taking a protection voltage of 36V as an example, selecting a seventh diode with a corresponding voltage stabilizing value, when the input voltage VI is lower than 36V, the seventh diode is in an off state without breakdown, so that the triode is in an off state due to the same potential of the base electrode and the emitter electrode, and the field effect tube is turned on by dividing the input voltage VI by the ninth resistor and the tenth resistor of the resistors, so as to meet the gate-source turn-on voltage VGS;
When the input voltage VI is greater than 36V, the seventh diode is broken down in the reverse direction to stabilize the cathode at 36V, and the base-emitter voltage of the triode is turned on once being greater than the threshold voltage, which is equivalent to shorting the gate G and the source S of the fet, thereby turning off the fet, and the output voltage VO is not output, so as to protect the circuitry.
The implementation principle of the invention is as follows: firstly, an input voltage is connected with a positive alternating current power supply at the positive electrode of a second diode of bridge rectification, a negative alternating current is connected with the negative electrode of a third diode of the bridge rectification circuit, the alternating current is changed into direct current after passing through the bridge rectification circuit, then high-frequency noise is filtered by a first filter module and then enters an LM2576, a second filter circuit is arranged at the periphery of the LM2576, and the second filter circuit is connected with a relay after clutter is filtered.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein and is not to be considered as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either by the foregoing teachings or by the teaching of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (1)
1. The passive signal output system is characterized by comprising a rectification module, a first filter circuit, a voltage stabilizing module and a second filter circuit;
The input end of the rectifying module is electrically connected with the voltage input end, the output end of the rectifying module is electrically connected with the input end of the first filter circuit, the output end of the first filter circuit is electrically connected with the input end of the voltage stabilizing module, the output end of the voltage stabilizing module is electrically connected with the input end of the second filter circuit, and the output end of the second filter circuit is connected with a relay;
the rectifying module comprises a first diode, a second diode, a third diode and a fourth diode;
The cathode of the first diode is connected with the cathode of the second diode, the anode of the second diode is connected with the cathode of the third diode, the anode of the third diode is connected with the anode of the fourth diode, and the cathode of the fourth diode is connected with the anode of the first diode;
The positive electrode of the first diode and the negative electrode of the fourth diode are both connected with the positive electrode of the input voltage, and the positive electrode of the second diode and the negative electrode of the third diode are both connected with the negative electrode of the input voltage;
the first filter circuit comprises a sixth electrolytic capacitor, a first capacitor, a second capacitor and a third capacitor;
The anode of the sixth electrolytic capacitor is connected with the cathode of the second diode, the cathode of the sixth electrolytic capacitor is connected with the anode of the third diode, the sixth electrolytic capacitor is connected with the first capacitor in parallel, and the first capacitor, the second capacitor and the third capacitor are connected in parallel;
The voltage stabilizing module comprises an LM2576 three-terminal voltage stabilizing chip, a first pin of the LM2576 is connected with the positive electrode of the sixth electrolytic capacitor, a sixth pin of the LM2576 is connected with the negative electrode of the sixth electrolytic capacitor, and a first capacitor is further connected between the first pin and the second pin of the LM 2576;
A second resistor is further connected between the second pin and the third pin of the LM2576, and a fifth resistor is further connected between the fourth pin and the fifth pin of the LM 2576;
The second filter circuit comprises a seventh electrolytic capacitor, a third resistor and a fifth capacitor, wherein the positive electrode of the seventh electrolytic capacitor is connected with a third pin of the LM2576, the negative electrode of the seventh electrolytic capacitor is connected with one end of the third resistor, the other end of the third capacitor is connected with the positive electrode of the seventh electrolytic capacitor, and the seventh electrolytic capacitor is connected with the fifth capacitor in parallel;
the second filter circuit further comprises a ninth electrolytic capacitor, a fourth capacitor and a sixth resistor, wherein the positive electrode of the ninth electrolytic capacitor is connected with the fourth pin of the LM2576, the negative electrode of the ninth electrolytic capacitor is connected with the sixth pin of the LM2576, and the ninth electrolytic capacitor is connected with the fourth capacitor and the sixth resistor in parallel;
The positive electrode of the eighth electrolytic capacitor is connected with the negative electrode of the seventh electrolytic capacitor through the fourth resistor, and the two ends of the eighth electrolytic capacitor are also connected with a sixth capacitor in parallel;
The positive electrode of the sixth light-emitting diode is connected with the negative electrode of the seventh electrolytic capacitor, the negative electrode of the sixth light-emitting diode is connected with one end of the relay, and the other end of the relay is connected with the negative electrode of the ninth electrolytic capacitor;
a fifth diode is connected in reverse parallel at two ends of the relay;
The input end of the rectifying module is also connected with an overvoltage protection circuit;
the overvoltage protection circuit comprises a triode, a field effect transistor, a seventh resistor, an eighth resistor and a seventh diode;
The emitter of the triode is connected with the S pole of the field effect tube, the collector of the triode is connected with the G pole of the field effect tube, the base of the triode is connected with one end of the eighth resistor, the other end of the eighth resistor is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with the positive pole of a power supply, one end of the seventh resistor far away from the emitter of the triode is connected with the negative pole of the seventh diode, and the positive pole of the seventh diode is connected with the negative pole of the power supply;
An eighth diode is further connected in series between the S pole and the D pole of the field effect tube, the positive pole of the eighth diode is connected with the D pole of the field effect tube, the negative pole of the eighth diode is connected with the S pole of the field effect tube, a tenth resistor is further connected in series between the G pole of the field effect tube and the seventh diode, and a ninth resistor is further connected in series between the G pole of the field effect tube and the positive pole of the seventh diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746663.0A CN110401360B (en) | 2019-08-14 | 2019-08-14 | Passive signal output system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746663.0A CN110401360B (en) | 2019-08-14 | 2019-08-14 | Passive signal output system |
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| CN110401360A CN110401360A (en) | 2019-11-01 |
| CN110401360B true CN110401360B (en) | 2024-06-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203607819U (en) * | 2013-11-26 | 2014-05-21 | 成都理想科技开发有限公司 | Power supply overvoltage protection circuit of alarm system |
| CN204392103U (en) * | 2015-02-03 | 2015-06-10 | 江建明 | A kind of power circuit for switch |
| CN210608942U (en) * | 2019-08-14 | 2020-05-22 | 成都克伏特航空设备有限公司 | Output system of passive signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103426683B (en) * | 2013-08-26 | 2015-10-28 | 浙江正泰电器股份有限公司 | The time relay of Metal halogen lamp class load |
| CN204118791U (en) * | 2014-08-29 | 2015-01-21 | 天宇通讯科技(昆山)有限公司 | The control protection electric circuit of portable power source |
| CN206575206U (en) * | 2017-03-16 | 2017-10-20 | 佛山远捷电源设备有限公司 | A kind of charger circuit structure |
| CN207612045U (en) * | 2017-08-18 | 2018-07-13 | 上海芯导电子科技有限公司 | A kind of protection chip |
| CN207802470U (en) * | 2018-02-05 | 2018-08-31 | 佛山德仁照明科技有限公司 | A kind of LED power |
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- 2019-08-14 CN CN201910746663.0A patent/CN110401360B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203607819U (en) * | 2013-11-26 | 2014-05-21 | 成都理想科技开发有限公司 | Power supply overvoltage protection circuit of alarm system |
| CN204392103U (en) * | 2015-02-03 | 2015-06-10 | 江建明 | A kind of power circuit for switch |
| CN210608942U (en) * | 2019-08-14 | 2020-05-22 | 成都克伏特航空设备有限公司 | Output system of passive signal |
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