CN104467782A - Electronic device and switch control circuit thereof - Google Patents
Electronic device and switch control circuit thereof Download PDFInfo
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- CN104467782A CN104467782A CN201310423413.6A CN201310423413A CN104467782A CN 104467782 A CN104467782 A CN 104467782A CN 201310423413 A CN201310423413 A CN 201310423413A CN 104467782 A CN104467782 A CN 104467782A
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- nmos tube
- resistance
- switch
- hall element
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Abstract
The invention provides an electronic device and a switch control circuit thereof. The switch control circuit comprises: a Hall element, a first resistor, a second resistor, an NMOS transistor and a third resistor. When the hall element is subjected to magnetic field induction, a first port and a second port of the hall element are disconnected, the second port is floating, so that a base electrode of the NMOS transistor is in a high level, the NMOS transistor is on and the switch is correspondingly on, and an energy storage circuit supplies power to a power consumption element; and when the hall element is not subjected to magnetic field induction, the first port and the second port of the hall element are connected, the second port is grounded, so that the base electrode of the NMOS transistor is in a low level, the NMOS transistor is off and the switch is correspondingly off, and the energy storage circuit stops supplying power to the power consumption element. When a user enables the Hall element to be induced by a magnetic element, the switch control circuit controls on and off of a connection between the energy storage circuit and the power consumption element without directly contacting the switch, and this is much safer in use.
Description
Technical field
The present invention relates to a kind of electronic installation and ON-OFF control circuit thereof, particularly relate to a kind of electronic installation and the ON-OFF control circuit thereof that utilize Hall element control power supply.
Background technology
Current electronic installation general tumbler switch carries out switching on and shutting down control.As shown in Figure 1, for existing electronic installation carries out the circuit diagram of switch control rule.Electronic installation 1 comprises power interface 10, accumulator 20, tumbler switch 30 and some consuming components 40.This power interface 10 is for couple in adapter.
When user stir tumbler switch 30 tumbler switch 30 is closed time, the power interface 10 being connected with adapter powers to some consuming components 40 by accumulator 20.But present tumbler switch 30 needs user to stir could close or disconnect with hand, if during circuit electric leakage, it is dangerous that user contacts tumbler switch 30.
Summary of the invention
The invention provides a kind of electronic installation and ON-OFF control circuit thereof.
A kind of ON-OFF control circuit, is connected with a switch, and for the closed of control switch and disconnection, thus control one adapter is powered by an accumulator to some consuming components or stopped power supply.This ON-OFF control circuit comprises: a Hall element, one first resistance, one second resistance, a NMOS tube and one the 3rd resistance, this Hall element has 1,2,3,4 four port, wherein the 1st, 3,4 port ground connection, 2nd port connects a voltage source by the first resistance, connected the base stage of NMOS tube by the second resistance simultaneously, the collector ground connection of NMOS tube, the emitter-base bandgap grading of NMOS tube passes through the 2nd port of the 3rd resistance connecting valve, wherein, the 2nd port is to the 1st Port-Controlled and corresponding connection or disconnection; When Hall element is subject to magnetic field induction, the 1st port and the 2nd port disconnect, and make the 2nd port unsettled, thus make the base stage of NMOS tube be in high level, NMOS tube conducting, and make the corresponding conducting of this switch, then accumulator is powered to consuming components; When Hall element is not subject to magnetic field induction, between the 1st port and the 2nd port, conducting connects, and makes the 2nd port ground connection, thus makes the base stage of NMOS tube be in low level, and NMOS tube is ended, and switch is ended, then accumulator stops powering to consuming components.
A kind of electronic installation, comprise an adapter, an accumulator, a switch, an ON-OFF control circuit and some consuming components, this ON-OFF control circuit is connected with switch, for the closed of control switch and disconnection, thus control one adapter is powered by an accumulator to some consuming components or is stopped power supply.This ON-OFF control circuit comprises: a Hall element, one first resistance, one second resistance, a NMOS tube and one the 3rd resistance, this Hall element has 1,2,3,4 four port, wherein the 1st, 3,4 port ground connection, 2nd port connects a voltage source by the first resistance, connected the base stage of NMOS tube by the second resistance simultaneously, the collector ground connection of NMOS tube, the emitter-base bandgap grading of NMOS tube passes through the 2nd port of the 3rd resistance connecting valve, wherein, the 2nd port is to the 1st Port-Controlled and corresponding connection or disconnection; When Hall element is subject to magnetic field induction, the 1st port and the 2nd port disconnect, and make the 2nd port unsettled, thus make the base stage of NMOS tube be in high level, NMOS tube conducting, and make the corresponding conducting of this switch, then accumulator is powered to consuming components; When Hall element is not subject to magnetic field induction, between the 1st port and the 2nd port, conducting connects, and makes the 2nd port ground connection, thus makes the base stage of NMOS tube be in low level, and NMOS tube is ended, and switch is ended, then accumulator stops powering to consuming components.
Electronic installation of the present invention and ON-OFF control circuit thereof utilize Hall element to control power supply, do not need user's contact-making switch element, thus safer.
Accompanying drawing explanation
Fig. 1 is the circuit diagram for the ON-OFF control circuit in existing electronic installation.
Fig. 2 is the circuit diagram of the ON-OFF control circuit under the preferred embodiment for the present invention in electronic installation.
Main element symbol description
| Electronic installation | 1，1’ |
| Power interface | 10 |
| Accumulator | 20 |
| Resistance | 201 |
| Electric capacity | 202 |
| Tumbler switch | 30 |
| Consuming components | 40 |
| Switch | 30’ |
| Fuse | 50 |
| ON-OFF control circuit | 60 |
| Hall element | 601 |
| First resistance | 602 |
| Second resistance | 603 |
| NMOS tube | 604 |
| 3rd resistance | 605 |
| Protective circuit | 70 |
| 4th resistance | 701 |
| NMOS tube | 702 |
| Protection electric capacity | 703 |
| 5th resistance | 704 |
| Filter capacitor | 80 |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 2, is the circuit diagram of the ON-OFF control circuit under the preferred embodiment for the present invention in electronic installation.Electronic installation 1 ', except comprising one for except power interface 10, accumulator 20, switch 30 ' of couple in adapter and some consuming components 40, also comprises fuse 50 and an ON-OFF control circuit 60.This switch 30 ' is connected between some consuming components 40 and accumulator 20, for conducting or the connection that ends between this some consuming components 40 and accumulator 20, thus the adapter that power interface 10 is got involved is powered by this accumulator 20 to some consuming components 40 or is stopped power supply.Concrete, switch 30 ' is a PMOS Q1.The source electrode of PMOS Q1 connects some consuming components 40, and drain electrode connects accumulator 20.
Fuse 50 is connected between adapter 10 and accumulator 20, be short-circuited for circuit in electronic installation 1 ' or heavy overload time due to electric current increase and automatically fuse, play protection electronic installation 1 ' effect.
Accumulator 20 comprises resistance 201 and an electric capacity 202, and for receiving the electric current that power interface 10 accesses, store electrical energy is powered to consuming components 40.
ON-OFF control circuit 60 is connected with switch 30 ', for conducting and the disconnection of control switch 30 '.Concrete, this ON-OFF control circuit 60 is connected with the grid of this PMOS Q1.This ON-OFF control circuit 60 comprises Hall element 601,1 first resistance 602,1 second resistance 603, one NMOS tube 604 and one the 3rd resistance 605.Hall element 601 has 4 ports, wherein 1,3,4 port ground connection, and the 2nd port connects a voltage source Vcc by the first resistance 602, is connected the grid of NMOS tube 604 by the second resistance 603 simultaneously.The grounded drain of NMOS tube 604, the source electrode of NMOS tube 604 connects this switch 30 ' by the 3rd resistance 605.Obviously, when switch 30 ' is for PMOS Q1, the source electrode of NMOS tube 604 connects the grid of PMOS Q1 by the 3rd resistance 605.
When Hall element 601 is subject to magnetic field induction, connection between 1st port and the 2nd port disconnects, make the 2nd port unsettled, thus make the grid of NMOS tube 604 be connected to this voltage source Vcc by this second resistance 603 and be in high level, NMOS tube 604 conducting, then the grid of PMOS Q1 is in low level by NMOS tube 604 ground connection of this conducting, makes the corresponding conducting of this PMOS Q1, and the connection of conducting accumulator 20 and consuming components 40, then accumulator 20 is powered to consuming components 40.
When Hall element 601 is not subject to responding to, conducting between 1st port and the 2nd port, make the 2nd port ground connection, thus make the grid of NMOS tube 604 be connected ground connection by the 2nd port with the 1st port and be in low level, NMOS tube 604 is ended, then the grid of PMOS Q1 is in high level, makes the corresponding cut-off of this PMOS Q1, then disconnect the connection of accumulator 20 and consuming components 40, then accumulator 20 stops powering to consuming components 40.
Therefore, user can utilize magnetic element that Hall element 601 is responded to, and controls conducting and the disconnection of the connection of accumulator 20 and consuming components 40, and does not need direct contact-making switch 30 ', use safer.Wherein, this magnetic element can be magnet etc.
Wherein, this PMOS Q1 can be PNP triode and replaces, and this NMOS tube 604 can be NPN triode and replaces.
Electronic installation 1 ' also comprises a protective circuit 70, concrete, and protective circuit 70 comprises one the 4th resistance 701, one NMOS tube 702, protection electric capacity 703 and one the 5th resistance 704.4th resistance 701 one end is connected to the connected node between power interface 10 and fuse 50, and the other end connects the grid of NMOS tube 702.The source electrode of NMOS tube 702 is connected an equipotential, grounded drain with one end of the 5th resistance 704.One end of protection electric capacity 703 is connected to the connected node between adapter 10 and fuse 50.The other end ground connection of protection electric capacity 703.5th resistance 704 two ends are connected to source electrode pole and the drain electrode of NMOS tube 702.Because NMOS tube 702 is in cut-off state always, therefore there iing foreign object, when inserting between power interface 10 and fuse 50 as pointed, because this NMOS tube 702 makes to have same equipotential between power interface 10 and fuse 50, thus can not get an electric shock.
Electronic installation 1 ' also comprises a filter capacitor 80, the link of one end connecting valve 30 ' and consuming components 40, other end ground connection, for when switch 30 ' conducting, carries out filtering to the electric current sending consuming components 40 to, thus protection consuming components 40.
Claims (8)
1. an ON-OFF control circuit, is connected with a switch, and for the closed of control switch and disconnection, thus control one adapter is powered by an accumulator to some consuming components or stopped power supply, and it is characterized in that, this ON-OFF control circuit comprises:
One Hall element, one first resistance, one second resistance, a NMOS tube and one the 3rd resistance, this Hall element has 1,2,3,4 four port, wherein the 1st, 3,4 port ground connection, 2nd port connects a voltage source by the first resistance, connected the base stage of NMOS tube by the second resistance, the collector ground connection of NMOS tube, the emitter-base bandgap grading of NMOS tube passes through the 2nd port of the 3rd resistance connecting valve simultaneously, wherein, the 2nd port is to the 1st Port-Controlled and corresponding connection or disconnection;
When Hall element is subject to magnetic field induction, the 1st port and the 2nd port disconnect, and make the 2nd port unsettled, thus make the base stage of NMOS tube be in high level, NMOS tube conducting, and make the corresponding conducting of this switch, then accumulator is powered to consuming components;
When Hall element is not subject to magnetic field induction, between the 1st port and the 2nd port, conducting connects, and makes the 2nd port ground connection, thus makes the base stage of NMOS tube be in low level, and NMOS tube is ended, and switch is ended, then accumulator stops powering to consuming components.
2. ON-OFF control circuit as claimed in claim 1, it is characterized in that, described switch is a PMOS, the emitter-base bandgap grading of the NMOS tube of described ON-OFF control circuit connects the base stage of PMOS by the 3rd resistance, during NMOS tube conducting, and PMOS conducting, during NMOS tube cut-off, PMOS is ended.
3. an electronic installation, comprise an adapter, an accumulator, a switch, an ON-OFF control circuit and some consuming components, this ON-OFF control circuit is connected with switch, for the closed of control switch and disconnection, thus control one adapter is powered by an accumulator to some consuming components or is stopped power supply, it is characterized in that, this ON-OFF control circuit comprises:
One Hall element, one first resistance, one second resistance, a NMOS tube and one the 3rd resistance, this Hall element has 1,2,3,4 four port, wherein the 1st, 3,4 port ground connection, 2nd port connects a voltage source by the first resistance, connected the base stage of NMOS tube by the second resistance, the collector ground connection of NMOS tube, the emitter-base bandgap grading of NMOS tube passes through the 2nd port of the 3rd resistance connecting valve simultaneously, wherein, the 2nd port is to the 1st Port-Controlled and corresponding connection or disconnection;
When Hall element is subject to magnetic field induction, the 1st port and the 2nd port disconnect, and make the 2nd port unsettled, thus make the base stage of NMOS tube be in high level, NMOS tube conducting, and make the corresponding conducting of this switch, then accumulator is powered to consuming components;
When Hall element is not subject to magnetic field induction, between the 1st port and the 2nd port, conducting connects, and makes the 2nd port ground connection, thus makes the base stage of NMOS tube be in low level, and NMOS tube is ended, and switch is ended, then accumulator stops powering to consuming components.
4. electronic installation as claimed in claim 3, it is characterized in that, described switch is a PMOS, the emitter-base bandgap grading of the NMOS tube of described ON-OFF control circuit connects the base stage of PMOS by the 3rd resistance, during NMOS tube conducting, and PMOS conducting, during NMOS tube cut-off, PMOS is ended.
5. electronic installation as claimed in claim 3; it is characterized in that; described electronic installation also comprises a fuse and is connected between adapter and accumulator, be short-circuited for circuit in electronic installation or heavy overload time automatically fuse, play protection electronic installation effect.
6. electronic installation as claimed in claim 5, it is characterized in that, described electronic installation also comprises a protective circuit, comprise one the 4th resistance, one NMOS tube, one protection electric capacity and one the 5th resistance, 4th resistance one end is connected to the connected node between power interface and fuse, the other end connects the grid of NMOS tube, the source electrode of NMOS tube is connected an equipotential with one end of the 5th resistance, grounded drain, one end of protection electric capacity is connected to the connected node between adapter and fuse, the other end ground connection of protection electric capacity, 5th resistance two ends are connected to source electrode and the drain electrode of NMOS tube, because NMOS tube is in cut-off state always, therefore when there being foreign object to insert between power interface and fuse, because this NMOS tube makes to have same equipotential between power interface and fuse, thus can not get an electric shock.
7. electronic installation as claimed in claim 3, it is characterized in that, described accumulator comprises a resistance and an electric capacity, and for receiving the electric current that adapter produces, store electrical energy is powered to consuming components.
8. electronic installation as claimed in claim 3, it is characterized in that, described electronic installation also comprises a filter capacitor; the link of one end connecting valve and consuming components, other end ground connection, for when switch conduction; filtering is carried out to the electric current sending consuming components to, thus protection consuming components.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423413.6A CN104467782A (en) | 2013-09-17 | 2013-09-17 | Electronic device and switch control circuit thereof |
| TW102134395A TW201513570A (en) | 2013-09-17 | 2013-09-24 | Electronic device and switch control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423413.6A CN104467782A (en) | 2013-09-17 | 2013-09-17 | Electronic device and switch control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104467782A true CN104467782A (en) | 2015-03-25 |
Family
ID=52913262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310423413.6A Pending CN104467782A (en) | 2013-09-17 | 2013-09-17 | Electronic device and switch control circuit thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104467782A (en) |
| TW (1) | TW201513570A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614896A (en) * | 2020-05-12 | 2020-09-01 | 上海创功通讯技术有限公司 | Camera control circuit, terminal and control method |
| CN112635242A (en) * | 2020-11-27 | 2021-04-09 | 努比亚技术有限公司 | Electronic price tag power supply method and circuit and electronic price tag |
| CN112633450A (en) * | 2020-11-23 | 2021-04-09 | 努比亚技术有限公司 | Electronic price tag starting control method and device |
-
2013
- 2013-09-17 CN CN201310423413.6A patent/CN104467782A/en active Pending
- 2013-09-24 TW TW102134395A patent/TW201513570A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614896A (en) * | 2020-05-12 | 2020-09-01 | 上海创功通讯技术有限公司 | Camera control circuit, terminal and control method |
| CN112633450A (en) * | 2020-11-23 | 2021-04-09 | 努比亚技术有限公司 | Electronic price tag starting control method and device |
| CN112635242A (en) * | 2020-11-27 | 2021-04-09 | 努比亚技术有限公司 | Electronic price tag power supply method and circuit and electronic price tag |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201513570A (en) | 2015-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |