CN108988437B - Power supply trigger circuit - Google Patents
Power supply trigger circuit Download PDFInfo
- Publication number
- CN108988437B CN108988437B CN201810982934.8A CN201810982934A CN108988437B CN 108988437 B CN108988437 B CN 108988437B CN 201810982934 A CN201810982934 A CN 201810982934A CN 108988437 B CN108988437 B CN 108988437B
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- Prior art keywords
- power supply
- circuit
- resistor
- control circuit
- power
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a power supply trigger circuit which comprises a first power supply, a control circuit and a power supply circuit, wherein the input end of the power supply circuit is connected with the first power supply, and the output end of the power supply circuit is connected with the power supply end of a load circuit; the input end of the control circuit is connected with the output end of the trigger signal source, and the output end of the control circuit is connected with the power supply circuit; the output end of the power supply circuit is also connected with the input end of the control circuit so as to maintain the high-level signal of the input end of the control circuit after the power supply circuit is conducted. When the trigger signal source does not give a high-level signal, the first power supply does not supply power to the load circuit, and does not consume electric quantity. After the trigger signal source gives out a high-level signal, the first power supply supplies power to the load circuit for use, and the high level of the input end of the control circuit can be maintained, so that the power-off control circuit can continuously operate after the power of a product is off.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a power supply trigger circuit.
Background
At present, a plurality of batteries of products in the market are already assembled when leaving the factory, however, some products are provided with loads such as time display and the like which need uninterrupted power supply of the batteries, if the batteries supply power to the loads when leaving the factory, the electric quantity of the batteries is consumed in the period from leaving the factory to selling the products to users, and finally, the time for actually using the batteries by the users is shortened, so that the product experience is affected.
Disclosure of Invention
Accordingly, one of the objectives of the present invention is to provide a power trigger circuit to avoid the battery consumption of the product during the period from the shipment to the sale to the user.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a power trigger circuit comprises a first power supply, a control circuit and a power supply circuit,
The input end of the power supply circuit is connected with the first power supply, and the output end of the power supply circuit is connected with the power supply end of the load circuit;
The input end of the control circuit is connected with the output end of the trigger signal source, and the output end of the control circuit is connected with the power supply circuit;
the control circuit is used for controlling the power supply circuit to be conducted when the trigger signal source gives out a high-level signal so as to enable the first power supply to supply power to the load circuit;
the output end of the power supply circuit is also connected with the input end of the control circuit so as to maintain the high-level signal of the input end of the control circuit after the power supply circuit is conducted.
Preferably, the power supply circuit comprises a PNP triode, and an emitter of the PNP triode forms an input end of the power supply circuit; the collector electrode of the PNP triode forms the output end of the power supply circuit; the base electrode of the PNP triode is connected with the output end of the control circuit;
The control circuit is used for outputting a low-level signal to enable the PNP triode to be conducted when the trigger signal source gives out a high-level signal.
Preferably, the control circuit comprises an NPN triode, and the base electrode of the NPN triode forms the input end of the control circuit; the emitter of the NPN triode is grounded, and the collector of the NPN triode is connected with a first resistor in series and then connected with the first power supply; and the common end of the collector of the NPN triode and the first resistor is the output end of the control circuit.
Preferably, the collector of the NPN triode is connected in series with a second resistor and the first resistor in sequence and then connected with the first power supply, and the common end of the second resistor and the first resistor is the output end of the control circuit.
Preferably, the trigger signal source comprises a third resistor, wherein the first end of the third resistor is connected with the base electrode of the NPN triode, and the second end of the third resistor is connected with the output end of the trigger signal source.
Preferably, the trigger signal source comprises a first resistor, a second resistor and a third resistor, wherein the first end of the fifth resistor is connected between the output end of the trigger signal source and the second end of the third resistor, and the second end of the fifth resistor is grounded.
Preferably, the trigger signal source comprises a first resistor, a second resistor and a third resistor, wherein the first end of the first resistor is connected with the collector electrode of the PNP triode, and the second end of the first resistor is connected between the output end of the trigger signal source and the common end of the fifth resistor and the second end of the third resistor.
Preferably, a diode is connected between the collector of the PNP triode and the power supply end of the load circuit, the anode of the diode is connected with the collector of the PNP triode, and the cathode of the diode is connected with the power supply end of the load circuit.
Preferably, the trigger signal source is a single chip microcomputer, and the high-level signal output end of the single chip microcomputer forms the output end of the trigger signal source.
Preferably, the trigger signal source comprises a second power supply and a switch key which are sequentially connected in series, and one end of the switch key, which is not connected with the second power supply, forms an output end of the trigger signal source.
Therefore, when the trigger signal source does not give a high-level signal, the first power supply does not supply power to the load circuit, and does not consume electric quantity. After the trigger signal source gives out a high-level signal, the control circuit controls the power supply circuit to be conducted so that the first power supply supplies power to the load circuit for use; meanwhile, the output end of the power supply circuit is also connected with the input end of the control circuit, so that after the power supply circuit is conducted, a high-level signal of the input end of the control circuit can be maintained, and the whole circuit can continuously run after the power of a product is off.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a power trigger circuit according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of a power trigger circuit according to another embodiment of the present invention.
Detailed Description
The present invention is described below based on examples, but the present invention is not limited to only these examples. Well-known methods, procedures, flows, and components have not been described in detail so as not to obscure the nature of the invention.
Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The invention discloses a power supply trigger circuit which is used for avoiding the consumption of a first power supply by a product in a period from delivery to sale to a user.
Referring to fig. 1 and 2, an embodiment of the present invention provides a power trigger circuit, including a first power VCC1, a control circuit and a power supply circuit,
The input end of the power supply circuit is connected with the first power supply VCC1, and the output end of the power supply circuit is connected with the power supply end of the load circuit;
The input end of the control circuit is connected with the output end of the trigger signal source, and the output end of the control circuit is connected with the power supply circuit;
The control circuit is used for controlling the power supply circuit to be conducted when the trigger signal source gives out a trigger signal, for example, the trigger signal is in a high level, so that the first power supply VCC1 supplies power to the load circuit;
the output end of the power supply circuit is also connected with the input end of the control circuit so as to maintain the input of the trigger signal of the input end of the control circuit, for example, maintain the input of the high level signal after the power supply circuit is conducted.
When the trigger signal source does not give a trigger signal, such as a high-level signal, the first power supply VCC1 does not supply power to the load circuit, and does not consume electric quantity. After the trigger signal source gives out a high-level signal, the control circuit controls the power supply circuit to be conducted so as to enable the first power supply VCC1 to supply power to the load circuit; meanwhile, the output end of the power supply circuit is also connected with the input end of the control circuit, so that after the power supply circuit is conducted, a high-level signal of the input end of the control circuit can be maintained, and the whole circuit can continuously run after the power of a product is off.
Preferably, the power supply circuit comprises a PNP triode Q2, and an emitter E of the PNP triode Q2 forms an input end of the power supply circuit; the collector C of the PNP triode Q2 forms the output end of the power supply circuit; the base B of the PNP triode Q2 is connected with the output end of the control circuit;
The control circuit is used for outputting a low-level signal to enable the PNP triode Q2 to be conducted when the trigger signal source gives out a high-level signal.
Preferably, the control circuit comprises an NPN triode Q1, and a base B of the NPN triode Q1 forms an input end of the control circuit; the emitter E of the NPN triode Q1 is grounded, and the collector C of the NPN triode Q1 is connected with a first resistor R1 in series and then is connected with a first power supply VCC 1; the common end of the collector C of the NPN triode Q1 and the first resistor R1 is the output end of the control circuit. The first resistor R1 is a current limiting resistor.
When the trigger signal source does not give a high-level signal, the NPN triode Q1 and the PNP triode Q2 are in a cut-off state, the first power supply VCC1 does not supply power to the load circuit, and electric quantity is not consumed. After the trigger signal source gives a high-level signal, the NPN triode Q1 is conducted, the base B of the PNP triode Q2 is grounded through the NPN triode Q1, so that the PNP triode Q2 is conducted, and the first power supply VCC1 supplies power to the load circuit for use; meanwhile, the collector C of the PNP triode Q2 is connected with the base B of the NPN triode Q1, so that the electric signal conducted by the NPN triode Q1 can be maintained, and the whole circuit can continuously run after the product is powered off.
Preferably, the collector C of the NPN triode Q1 is connected in series with the second resistor R2 and the first resistor R1 in sequence and then connected to the first power VCC1, and the common terminal of the second resistor R2 and the first resistor R1 is the output terminal of the control circuit. The second resistor R2 is a current limiting resistor.
Preferably, the power triggering circuit comprises a third resistor R3, a first end of the third resistor R3 is connected with a base electrode of the NPN triode Q1, and a second end of the third resistor R3 is connected with an output end of the triggering signal source.
Preferably, the power trigger circuit includes a fifth resistor R5, a first end of the fifth resistor R5 is connected between the output end of the trigger signal source and a second end of the third resistor R3, and a second end of the fifth resistor R5 is grounded.
The fifth resistor R5 is used for preventing the NPN transistor Q1 from being misled, and when the signal output from the trigger signal source is unstable, a spike level may be generated, and this voltage may be pulled down by the fifth resistor R5 due to the relatively short time.
Preferably, the power trigger circuit includes a fourth resistor R4, a first end of the fourth resistor R4 is connected to the collector C of the PNP triode Q2, and a second end of the fourth resistor R4 is connected between the output end of the trigger signal source and a common end of the fifth resistor R5 and the second end of the third resistor R3.
Preferably, a diode D1 is connected between the collector C of the PNP triode Q2 and the power supply terminal of the load circuit, the positive electrode of the diode D1 is connected with the collector C of the PNP triode Q2, and the negative electrode of the diode D1 is connected with the power supply terminal of the load circuit.
Through the arrangement, the PNP triode Q2 can be prevented from being disconnected by outputting a high level when the load circuit works, and the first power supply VCC1 can not supply power to the load circuit.
As shown in fig. 1, preferably, the trigger signal source is a single-chip microcomputer in the load circuit, and the high-level signal output end of the single-chip microcomputer forms the output end of the trigger signal source. Specifically, the trigger signal source can be directly given after the singlechip of the product is electrified when the product is electrified, or can be given after the related key is triggered.
The single chip microcomputer of the product is directly used as a trigger signal source, and the trigger signal source is not required to be additionally arranged, so that the cost of the product can be reduced. In addition, if the trigger signal source is directly when the product is electrified, the singlechip of the product is directly provided after being electrified, so that no additional key is needed, the appearance of the product is not affected, and the cost can be reduced.
In another preferred embodiment, as shown in fig. 2, the trigger signal source includes a second power VCC2 and a switch button S1 connected in series, where an end of the switch button S1 not connected to the second power VCC2 forms an output terminal of the trigger signal source.
Preferably, the key S1 is connected in series with a sixth resistor R6 and then connected to the input terminal of the control circuit, and the sixth resistor R6 may be omitted.
In the power trigger circuit according to embodiment 12 of the present invention, on the basis of embodiment 10, the key S1 is connected in series with the seventh resistor R7 and then grounded, and the seventh resistor R7 may be omitted.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the invention, are intended to be included within the scope of the appended claims.
Claims (8)
1. A power trigger circuit is characterized by comprising a first power supply, a control circuit and a power supply circuit,
The input end of the power supply circuit is connected with the first power supply, and the output end of the power supply circuit is connected with the power supply end of the load circuit;
the input end of the control circuit is connected with the output end of a trigger signal source, the output end of the control circuit is connected with the power supply circuit, and the trigger signal source is a singlechip in the load circuit;
The control circuit is used for controlling the power supply circuit to be conducted when the trigger signal source gives out a trigger signal so as to enable the first power supply to supply power to the load circuit;
the output end of the power supply circuit is also connected with the input end of the control circuit so as to maintain the trigger signal input of the input end of the control circuit after the power supply circuit is conducted.
2. The power trigger circuit of claim 1, wherein the power supply circuit comprises a PNP transistor, an emitter of the PNP transistor forming an input of the power supply circuit; the collector electrode of the PNP triode forms the output end of the power supply circuit; the base electrode of the PNP triode is connected with the output end of the control circuit;
The trigger signal is a high-level signal, and the control circuit is used for outputting a low-level signal when the trigger signal source gives out the high-level signal, so that the PNP triode is conducted.
3. The power trigger circuit of claim 2, wherein the control circuit comprises an NPN transistor, a base of the NPN transistor forming an input of the control circuit; the emitter of the NPN triode is grounded, and the collector of the NPN triode is connected with a first resistor in series and then connected with the first power supply; and the common end of the collector of the NPN triode and the first resistor is the output end of the control circuit.
4. The power trigger circuit of claim 3, wherein a collector of the NPN triode is connected in series with a second resistor and the first resistor in sequence and then connected to the first power supply, and a common terminal of the second resistor and the first resistor is an output terminal of the control circuit.
5. A power trigger circuit according to claim 3, comprising a third resistor having a first terminal connected to the base of the NPN transistor and a second terminal connected to the output of the trigger signal source.
6. The power trigger circuit of claim 5, comprising a fifth resistor having a first terminal connected between the output of the trigger signal source and a second terminal of the third resistor, the second terminal of the fifth resistor being grounded.
7. The power trigger circuit of claim 6, comprising a fourth resistor, a first terminal of the fourth resistor being connected to the collector of the PNP transistor, a second terminal of the fourth resistor being connected between the output terminal of the trigger signal source and a common terminal of a fifth resistor and the second terminal of the third resistor.
8. The power trigger circuit of claim 2, wherein a diode is connected between the collector of the PNP transistor and the power supply terminal of the load circuit, the anode of the diode is connected to the collector of the PNP transistor, and the cathode of the diode is connected to the power supply terminal of the load circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982934.8A CN108988437B (en) | 2018-08-27 | 2018-08-27 | Power supply trigger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982934.8A CN108988437B (en) | 2018-08-27 | 2018-08-27 | Power supply trigger circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108988437A CN108988437A (en) | 2018-12-11 |
| CN108988437B true CN108988437B (en) | 2024-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810982934.8A Active CN108988437B (en) | 2018-08-27 | 2018-08-27 | Power supply trigger circuit |
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| CN (1) | CN108988437B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578387B (en) * | 2023-10-27 | 2024-08-09 | 深圳市安保医疗科技股份有限公司 | Control circuit of multiple input power supply and switching power supply equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207664664U (en) * | 2017-12-18 | 2018-07-27 | 厦门芯阳科技股份有限公司 | A kind of bistable state key switch driving circuit that low pressure is automatically closed |
| CN208754027U (en) * | 2018-08-27 | 2019-04-16 | 珠海格力电器股份有限公司 | Power supply trigger circuit |
-
2018
- 2018-08-27 CN CN201810982934.8A patent/CN108988437B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207664664U (en) * | 2017-12-18 | 2018-07-27 | 厦门芯阳科技股份有限公司 | A kind of bistable state key switch driving circuit that low pressure is automatically closed |
| CN208754027U (en) * | 2018-08-27 | 2019-04-16 | 珠海格力电器股份有限公司 | Power supply trigger circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108988437A (en) | 2018-12-11 |
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