CN218569902U - Intelligent switching circuit of power consumption-saving power supply - Google Patents
Intelligent switching circuit of power consumption-saving power supply Download PDFInfo
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- CN218569902U CN218569902U CN202220896889.6U CN202220896889U CN218569902U CN 218569902 U CN218569902 U CN 218569902U CN 202220896889 U CN202220896889 U CN 202220896889U CN 218569902 U CN218569902 U CN 218569902U
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Abstract
The utility model discloses an intelligent switching circuit of power consumptive material, including external power source interface circuit, the grid of first P channel MOS pipe, drain electrode, N channel MOS pipe, first resistance and the second resistance of second P channel MOS pipe, external power source interface circuit include first lightning protection discharge tube, second lightning protection discharge tube, common mode filter inductance, first transient state suppression diode, second transient state suppression diode, third transient state suppression diode, the utility model discloses the input voltage loss is little, and external input voltage or battery voltage do not pass through the diode, and input voltage's pressure drop is little, the low power dissipation.
Description
Technical Field
The utility model belongs to the technical field of the power, concretely relates to economize and consume intelligent switching circuit of power.
Background
As the component of the bottommost layer of the Internet of things, the sensor is an inlet for data acquisition and is known as the heart of the Internet of things. However, many restrictive factors of the traditional sensor become more prominent under the outbreak and continuous promotion of the internet of things, especially the problem of the power supply mode. Particularly, in terms of the unattended operation requirement, the requirement on energy consumption is high, on one hand, the power consumption of the sensor can be reduced, and on the other hand, the energy source equipment is required to provide the output with the maximum potential. In actual use, a one-use one-standby scheme (or multiple energy sources are accessed) is adopted, and the data integrity of the equipment is detected under the condition of keeping unattended operation. Most doors are realized by existing switching equipment, energy and power consumption is caused by the equipment, at present, sensor nodes are mainly powered by batteries, and maintenance cost of manually replacing the batteries is huge. When the equipment is installed at a remote position, the difficulty of maintaining the power supply is increased, the passive device is adopted for construction, the reverse connection input protection and the mode without power voltage drop are realized, the seamless power supply access switching is realized, and the output of the energy equipment is maximized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an intelligent switching circuit of power consumptive for the above-mentioned problem to prior art exists.
The above object of the present invention is achieved by the following specific technical means:
an intelligent switching circuit of a power-saving supply comprises an external power supply interface circuit, wherein the output positive electrode of the external power supply interface circuit is respectively connected with the grid electrode of a first P-channel MOS tube, the drain electrode of a second P-channel MOS tube and the grid electrode of an N-channel MOS tube, the output negative electrode of the external power supply interface circuit is electrically connected with a first electrode,
the drain electrode of the first P-channel MOS tube is connected with an external battery, the source electrode of the first P-channel MOS tube is connected with the source electrode of the second P-channel MOS tube,
the grid electrode of the second P-channel MOS tube is connected with the source electrode of the N-channel MOS tube,
the drain electrode of the N-channel MOS tube is connected with the first electric ground,
two ends of the first resistor are respectively connected with the grid electrode and the source electrode of the second P-channel MOS tube,
two ends of the second resistor are respectively connected with the grid electrode of the first P-channel MOS tube and the first electric ground,
the source electrode of the first P-channel MOS tube and the source electrode of the second P-channel MOS tube are both connected with the input end of the power conversion chip.
As described above, the external power interface circuit includes an input positive terminal and an input negative terminal, the input positive terminal is connected to the second electrical ground through the first lightning protection discharge tube, the input negative terminal is connected to the second electrical ground through the second lightning protection discharge tube, the input positive terminal and the input negative terminal are respectively connected to the first input terminal and the second input terminal of the common mode filter inductor, the first output terminal and the second output terminal of the common mode filter inductor are respectively connected to the second electrical ground through the first transient suppression diode and the third transient suppression diode, the second transient suppression diode is disposed between the first output terminal and the second output terminal of the mode filter inductor, and the first output terminal and the second output terminal of the mode filter inductor are respectively used as the output positive terminal and the output negative terminal of the external power interface circuit.
As described above, the first transient suppression diode is connected in parallel with the first capacitor, the second transient suppression diode is connected in parallel with the second capacitor, and the third transient suppression diode is connected in parallel with the third capacitor.
Compared with the prior art, the utility model, have following advantage and positive effect:
1. the utility model has small input voltage loss, external input voltage or battery voltage does not pass through the diode, and the voltage drop of the input voltage is small;
2. the utility model does not need to provide extra operation power supply for operation, and has low power consumption;
3. the utility model has the function of reverse connection prevention, and the utility model can not be damaged after the input polarity of the external input voltage is reversely connected;
4. the seamless switching between the external power supply and the battery power supply can be realized, the seamless switching is under voltage fluctuation, the electric equipment is prevented from being restarted or being incapable of being used due to the voltage fluctuation, and the seamless switching is well applied to all fields with particularly high voltage requirements.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
To facilitate understanding and practice of the invention by those of ordinary skill in the art, the following detailed description of the invention is provided in connection with the examples, and it is to be understood that the examples described herein are for purposes of illustration and explanation only and are not intended to limit the invention.
As shown in fig. 1, an intelligent switching circuit of a power saving supply includes an external power interface circuit, an output positive electrode of the external power interface circuit is connected to a gate of a first P-channel MOS transistor Q1, a drain of a second P-channel MOS transistor Q2, and a gate of an N-channel MOS transistor Q3, respectively, an output negative electrode of the external power interface circuit is connected to a first electrical ground AGND, a drain of the first P-channel MOS transistor Q1 is connected to an external battery VBAT +, a source of the first P-channel MOS transistor Q1 is connected to a source of the second P-channel MOS transistor Q2, a gate of the second P-channel MOS transistor Q2 is connected to a source of the N-channel MOS transistor Q3, a drain of the N-channel MOS transistor Q3 is connected to the first electrical ground AGND, two ends of a first resistor R1 are connected to a gate and a source of the second P-channel MOS transistor Q2, two ends of the second resistor R2 are connected to a gate of the first P-channel MOS transistor Q1 and a first electrical ground AGND, respectively, and a source of the first P-channel MOS transistor Q1 is connected to an input terminal of the second P-channel MOS transistor Q2.
In this embodiment, the N-channel MOS transistor Q3 has a model of AO3402, the first P-channel MOS transistor Q1 and the second P-channel MOS transistor Q2 have a model of AO3407A, the power conversion chip may be a DC-DC chip or an LDO chip,
when external power source and external battery access simultaneously, N channel MOS pipe Q3's grid high level, N channel MOS pipe Q3 switches on, realizes that second P channel MOS pipe Q2 switches on, and first P channel MOS pipe Q1 is in and cuts to the state because the grid is very high, and external battery's voltage can't insert the power conversion chip, and external power source's voltage is as the input of power conversion chip behind second P channel MOS pipe Q2.
When the external power supply has no output, the grid electrode of the first P-channel MOS tube Q1 is low and is in a conducting state, the second P-channel MOS tube Q2 and the N-channel MOS tube Q3 are in a cut-off state, the voltage of the external battery is directly input into the power supply conversion chip through the first P-channel MOS tube Q1, the conduction no-voltage-drop characteristic of the MOS tubes is utilized, the battery can be well ensured to fully release energy, the power consumption of the battery is very low, energy consumption saving is realized, meanwhile, under the condition that the external power supply is disconnected, the output of the external battery can be also well seamlessly switched, and normal continuous work of the power supply conversion chip is realized.
The external power supply interface circuit comprises an input anode + IN and an input cathode-IN, wherein the input anode + IN is connected with a second electrical ground PE through a first lightning protection discharge tube GDT1, the input cathode-IN is connected with the second electrical ground PE through a second lightning protection discharge tube GDT2, the input anode + IN and the input cathode-IN are respectively connected with a first input end and a second input end of a common-mode filter inductor L1, a first output end and a second output end of the common-mode filter inductor L1 are respectively connected with the second electrical ground PE through a first transient suppression diode TVS1 and a third transient suppression diode TVS3, a second transient suppression diode TVS2 is arranged between the first output end and the second output end of the common-mode filter inductor L1, and the first output end and the second output end of the common-mode filter inductor L1 are respectively used as an output anode and an output cathode of the external power supply interface circuit. The first transient suppression diode TVS1 is connected in parallel with the first capacitor C1, the second transient suppression diode TVS2 is connected in parallel with the second capacitor C2, and the third transient suppression diode TVS3 is connected in parallel with the third capacitor C3.
BA151N is selected as the model of the first lightning protection discharge tube GDT1 and the model of the second lightning protection discharge tube GDT2, so that the lightning protection function is realized; the inductance value of the common-mode filter inductor L1 is 1mH, and the common-mode filter inductor plays a role in EMI filtering; the models of the first transient suppression diode TVS1, the second transient suppression diode TVS2 and the third transient suppression diode TVS3 are SMBJ20CA, SMBJ20A and SMBJ20CA respectively, the reverse connection of the positive pole and the negative pole of an external power supply can be prevented, the common mode filter inductor L1 comprises two common mode inductors, the two ends of the first common mode inductor are a first output end and a first output end of the common mode filter inductor L1 respectively, and the two ends of the second common mode inductor are a second output end and a second output end of the common mode filter inductor L1 respectively.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (3)
1. An intelligent switching circuit of a power-saving power supply comprises an external power supply interface circuit, and is characterized in that the positive output electrode of the external power supply interface circuit is respectively connected with the grid electrode of a first P-channel MOS tube (Q1), the drain electrode of a second P-channel MOS tube (Q2) and the grid electrode of an N-channel MOS tube (Q3), the negative output electrode of the external power supply interface circuit is connected with a first electrical ground (AGND),
the drain electrode of the first P-channel MOS tube (Q1) is connected with an external battery (VBAT +), the source electrode of the first P-channel MOS tube (Q1) is connected with the source electrode of the second P-channel MOS tube (Q2),
the grid electrode of the second P-channel MOS tube (Q2) is connected with the source electrode of the N-channel MOS tube (Q3),
the drain of the N-channel MOS transistor (Q3) is connected to a first electrical ground (AGND),
two ends of the first resistor (R1) are respectively connected with the grid electrode and the source electrode of the second P-channel MOS tube (Q2),
two ends of the second resistor (R2) are respectively connected with the grid electrode of the first P-channel MOS tube (Q1) and the first electric ground (AGND),
the source electrode of the first P-channel MOS tube (Q1) and the source electrode of the second P-channel MOS tube (Q2) are both connected with the input end of the power supply conversion chip.
2. The intelligent switching circuit of a power consumption saving power supply of claim 1, wherein the external power interface circuit comprises an input positive electrode (+ IN) and an input negative electrode (-IN), the input positive electrode (+ IN) is connected to the second electrical ground (PE) through a first lightning protection discharge tube (GDT 1), the input negative electrode (-IN) is connected to the second electrical ground (PE) through a second lightning protection discharge tube (GDT 2), the input positive electrode (+ IN) and the input negative electrode (-IN) are respectively connected to the first input end and the second input end of the common mode filter inductor (L1), the first output end and the second output end of the common mode filter inductor (L1) are respectively connected to the second electrical ground (PE) through a first transient suppression diode (TVS 1) and a third transient suppression diode (TVS 3), a second transient suppression diode (TVS 2) is arranged between the first output end and the second output end of the mode inductor filter inductor (L1), and the first output end and the second output end of the mode filter inductor (L1) are respectively used as the output positive electrode and the output negative electrode of the external power interface circuit.
3. A power-saving intelligent switching circuit, according to claim 2, characterized in that said first transient suppressor diode (TVS 1) is connected in parallel with said first capacitor (C1), said second transient suppressor diode (TVS 2) is connected in parallel with said second capacitor (C2), and said third transient suppressor diode (TVS 3) is connected in parallel with said third capacitor (C3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220896889.6U CN218569902U (en) | 2022-04-18 | 2022-04-18 | Intelligent switching circuit of power consumption-saving power supply |
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| CN202220896889.6U CN218569902U (en) | 2022-04-18 | 2022-04-18 | Intelligent switching circuit of power consumption-saving power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116455035A (en) * | 2023-05-30 | 2023-07-18 | 荣耀终端有限公司 | Protection circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116455035A (en) * | 2023-05-30 | 2023-07-18 | 荣耀终端有限公司 | Protection circuit and electronic equipment |
| CN116455035B (en) * | 2023-05-30 | 2023-10-20 | 荣耀终端有限公司 | Protection circuit and electronic equipment |
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