CN219875091U - Circuit for controlling turn-off or turn-on of positive electrode by adopting N-channel MOSFET - Google Patents
Circuit for controlling turn-off or turn-on of positive electrode by adopting N-channel MOSFET Download PDFInfo
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- CN219875091U CN219875091U CN202320946517.4U CN202320946517U CN219875091U CN 219875091 U CN219875091 U CN 219875091U CN 202320946517 U CN202320946517 U CN 202320946517U CN 219875091 U CN219875091 U CN 219875091U
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Abstract
The utility model discloses a circuit for controlling the turning-off or turning-on of an anode by adopting an N-channel MOSFET, which comprises a switch power supply module, a switch control module, a main circuit power supply module, a switch module, an output voltage detection module, a power supply interface, a system power supply module and a control module, wherein the power supply output end of the switch power supply module is connected with the switch control module, the main circuit power supply module is connected with the power supply interface through the switch module, the control signal output end of the switch control module is connected with the control end of the switch module, the output voltage detection module is connected between the switch module and the power supply interface, the power supply output end of the system power supply module is connected with the control module, the drive signal output end of the control module is connected with the control end of the switch control module, and the output end of the output voltage detection module is connected with the detection end of the control module, so that potential safety hazards can be eliminated and noise can not be generated in the use process.
Description
Technical Field
The utility model discloses a circuit for controlling on-off, in particular to a circuit for controlling the turn-off or turn-on of an anode by adopting an N-channel MOSFET, which is suitable for golf car chargers, supermarket shopping car chargers, children toy car chargers, electric wheelchair chargers, sightseeing car chargers, two-wheel electric car chargers, lithium battery chargers, lead-acid battery chargers or occasions with higher output voltage and electric shock of human bodies.
Background
Most of the electronic switching tubes of the charger are usually arranged at the negative electrode, and because the electronic switching tubes are arranged at the positive electrode, P-channel MOSFETs are needed, and the P-channel MOSFETs are not as common and commonly used in the market as N-channel MOSFETs, the electronic switching tubes are relatively expensive and are not easy to buy. However, the disadvantage of the electronic switch tube arranged at the negative electrode is that after the electronic switch tube is turned off, voltage still exists at the positive electrode, and if the output voltage is high and the human body can touch, discomfort can be felt, a tingling sensation can be felt, and even the danger of electric shock is generated.
If the on-off of the positive electrode needs to be controlled, the common means is to control the on-off of the positive electrode by adopting a conventional mechanical relay, but the conventional mechanical relay generates noise when being switched on or off, so that the user experience is poor.
Disclosure of Invention
Aiming at the defects that the charger in the prior art adopts an electronic switch tube to control the on-off of a negative electrode, potential safety hazards exist, a mechanical relay is adopted to control the on-off of a positive electrode, and noise can be generated in the using process, the utility model provides a novel circuit which adopts an N-channel MOSFET to control the on-off or on-off of the positive electrode, adopts a special circuit structure design, can control the on-off of the positive electrode through the N-channel MOSFET, eliminates the potential safety hazards, and can not generate noise in the using process.
The technical scheme adopted for solving the technical problems is as follows: a circuit for controlling the turn-off or turn-on of an anode by adopting an N-channel MOSFET comprises a switch power supply module, a switch control module, a main circuit power supply module, a switch module, an output voltage detection module, a power supply interface, a system power supply module and a control module, wherein the power supply output end of the switch power supply module is connected with the switch control module, the main circuit power supply module is connected with the power supply interface through the switch module, the control signal output end of the switch control module is connected with the control end of the switch module, the output voltage detection module is connected between the switch module and the power supply interface, the power supply output end of the system power supply module is connected with the control module, the drive signal output end of the control module is connected with the control end of the switch control module, and the output end of the output voltage detection module is connected with the detection end of the control module.
The technical scheme adopted by the utility model for solving the technical problems further comprises the following steps:
the switch power supply module comprises a transformer coil T1A, a diode D1 and a capacitor C1, wherein the diode D1 is connected in series to the output end of the transformer coil T1A, and the capacitor C1 is connected between the two output ends of the transformer coil T1A in a bridging manner.
The main circuit power supply module comprises a transformer coil T1B, a diode D2 and a capacitor C2, wherein the diode D2 is connected in series to the output end of the transformer coil T1B, and the capacitor C2 is connected between the two output ends of the transformer coil T1B in a bridging manner.
The system power supply module comprises a transformer coil T1C, a diode D3 and a capacitor C3, wherein the diode D3 is connected in series to the output end of the transformer coil T1C, and the capacitor C3 is connected between the two output ends of the transformer coil T1C in a bridging mode.
The switch control module comprises a triode Q1, a triode Q2, a resistor R3, a resistor R4, a resistor R7 and a resistor R8, wherein one end of the resistor R7 is connected with the base electrode of the triode Q2, the other end of the resistor R7 is connected with the driving signal output end of the control module, the resistor R7 is used as a current limiting resistor, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is connected with the base electrode of the triode Q1 through the resistor R4, the resistor R4 is used as the current limiting resistor, the emitting electrode of the triode Q1 is connected with the power output end of the switch power supply module, the collecting electrode of the triode Q1 is connected with the switch module as the output end of the switch control module, the resistor R3 is connected between the emitting electrode and the base electrode of the triode Q1, and the resistor R8 is connected between the emitting electrode and the base electrode of the triode Q2.
The switch module comprises an N-channel MOS tube QL1, an N-channel MOS tube QL2 and a resistor R1, wherein the drain electrode of the N-channel MOS tube QL1 is connected with the positive electrode of the power output end of the main power supply module, the source electrode of the N-channel MOS tube QL1 is connected with the source electrode of the N-channel MOS tube QL2, the drain electrode of the N-channel MOS tube QL2 is connected with the positive electrode of the power supply interface module, the grid electrodes of the N-channel MOS tube QL1 and the N-channel MOS tube QL2 are connected with the output end of the switch control module through the resistor R2 respectively, the resistor R1 is connected between the grid electrode and the source electrode of the N-channel MOS tube QL1, and the source electrode of the N-channel MOS tube QL2 is connected with the negative electrode of the output end of the switch power supply module.
The power supply interface module adopts a rechargeable battery interface or a device interface.
An exciting coil LF5 is connected in series between the main circuit power supply module and the power supply interface module.
The output voltage detection module comprises a resistor R5 and a resistor R6, the resistor R5 and the resistor R6 are connected in series between the positive electrode and the negative electrode of the power supply interface module, the resistor R5 is connected with the positive electrode of the power supply interface module, the resistor R6 is connected with the negative electrode of the power supply interface module, and the common end of the resistor R5 and the resistor R6 is used as the output end of the output voltage detection module to be connected with the detection end of the control module.
The beneficial effects of the utility model are as follows: the utility model adopts the N-channel MOSFET to control the on-off of the positive electrode, can charge the battery or work the equipment during normal output, and when the partial pressure of the battery detection pin detects the abnormality of the battery or the equipment end or no battery or no equipment exists, the drive signal pin does not output the level so as to achieve the purpose of turning off the positive electrode, thereby eliminating potential safety hazard and generating no noise during the use process.
The utility model will be further described with reference to the drawings and detailed description.
Drawings
Fig. 1 is a block diagram of the circuit of the present utility model.
Fig. 2 is a schematic circuit diagram of the present utility model.
Detailed Description
This example is a preferred embodiment of the present utility model, and other principles and basic structures are the same as or similar to those of this example, and all fall within the scope of the present utility model.
Referring to fig. 1 and 2, the utility model mainly comprises a switch power supply module, a switch control module, a main circuit power supply module, a switch module, an output voltage detection module, a power supply interface, a system power supply module and a control module, wherein a power output end of the switch power supply module is connected with the switch control module to supply power to the switch control module, the main circuit power supply module is connected with the power supply interface through the switch module, a control signal output end of the switch control module is connected with a control end of the switch module, the output voltage detection module is connected between the switch module and the power supply interface, a power output end of the system power supply module is connected with the control module to supply power to the control module, a driving signal output end of the control module is connected with a control end of the switch control module to drive the switch control module, and an output end of the output voltage detection module is connected with a detection end of the control module to output voltage detection signal to the control module.
In this embodiment, the switch power supply module includes a transformer coil T1A, a diode D1 and a capacitor C1, where the diode D1 is connected in series to an output end of the transformer coil T1A, the capacitor C1 is bridged between two output ends of the transformer coil T1A, in this embodiment, the capacitor C1 is connected to a rear stage of the diode D1, that is, one end of the diode D1 is connected to the transformer coil T1A, and the other end is connected to the capacitor C1, and after the output power of the transformer coil T1A is rectified by the diode D1 and filtered by the capacitor C1, the switch control module is supplied with power.
In this embodiment, the main circuit power supply module includes a transformer coil T1B, a diode D2 and a capacitor C2, where the diode D2 is connected in series to an output end of the transformer coil T1B, the capacitor C2 is bridged between two output ends of the transformer coil T1B, in this embodiment, the capacitor C2 is connected to a rear stage of the diode D2, that is, one end of the diode D2 is connected to the transformer coil T1B, and the other end is connected to the capacitor C2, and after the output power of the transformer coil T1B is rectified by the diode D2 and filtered by the capacitor C2, the power supply interface is supplied with power.
In this embodiment, the system power supply module includes a transformer coil T1C, a diode D3 and a capacitor C3, where the diode D3 is connected in series to an output end of the transformer coil T1C, the capacitor C3 is bridged between two output ends of the transformer coil T1C, in this embodiment, the capacitor C3 is connected to a rear stage of the diode D3, that is, one end of the diode D3 is connected to the transformer coil T1C, and the other end is connected to the capacitor C3, and after the output power of the transformer coil T1C is rectified by the diode D3 and filtered by the capacitor C3, the control module is supplied with power.
In this embodiment, the transformer coil T1A, the transformer coil T1B and the transformer coil T1C adopt three different secondary coils of the same transformer, and when implemented, may also adopt different transformers or different power supply systems.
In this embodiment, the switch control module includes triode Q1, triode Q2, resistance R3, resistance R4, resistance R7 and resistance R8, resistance R7 one end is connected with triode Q2's base, the resistance R7 other end is connected with control module's drive signal output, resistance R7 uses as current limiting resistor, triode Q2's projecting pole ground connection, triode Q2's collecting electrode passes through resistance R4 and is connected with triode Q1's base, resistance R4 uses as current limiting resistor, triode Q1's projecting pole is connected with switch power supply module's power output, triode Q1's collecting electrode is connected with switch module as switch control module's output, be connected with resistance R3 between triode Q1's projecting pole and the base, be connected with resistance R8 between triode Q2's projecting pole and the base.
In this embodiment, the switch module includes an N-channel MOS tube QL1, an N-channel MOS tube QL2, and a resistor R1, where a drain of the N-channel MOS tube QL1 is connected to a positive electrode of the power output end of the main power supply module, a source of the N-channel MOS tube QL1 is connected to a source of the N-channel MOS tube QL2, a drain of the N-channel MOS tube QL2 is connected to a positive electrode of the power supply interface module, gates of the N-channel MOS tube QL1 and the N-channel MOS tube QL2 are connected to an output end of the switch control module through the resistor R2, a resistor R1 is connected between the gates of the N-channel MOS tube QL1 and the source, and a source of the N-channel MOS tube QL2 is connected to a negative electrode of the output end of the switch power supply module.
In this embodiment, the power supply interface module adopts a rechargeable battery interface, and is used for connecting a battery, charging the battery, and when in specific implementation, the power supply interface module can also select an equipment interface to directly supply power to the electric equipment.
In this embodiment, an exciting coil LF5 is connected in series between the main power supply module and the power supply interface module, and is used for performing EMI processing on the output power of the main power supply module.
In this embodiment, the control module adopts a single-chip microcomputer chip, and because the performance requirement on the single-chip microcomputer is not high, the single-chip microcomputer on the market can basically meet the requirement, in this embodiment, the single-chip microcomputer chip adopts a single-chip microcomputer with the model of MT006, and when in specific implementation, the single-chip microcomputer chip can also adopt other models or series of single-chip microcomputers to replace.
In this embodiment, the output voltage detection module includes a resistor R5 and a resistor R6, where the resistor R5 and the resistor R6 are connected in series between the positive electrode and the negative electrode of the power supply interface module, the resistor R5 is connected with the positive electrode of the power supply interface module, the resistor R6 is connected with the negative electrode of the power supply interface module, the common end of the resistor R5 and the resistor R6 is used as the output end of the output voltage detection module and is connected with the detection end of the control module, in this embodiment, the detection end of the control module has an ADC function, if the selected control module does not have an ADC function, an analog-to-digital conversion chip needs to be connected between the output end of the output voltage detection module and the control module, and the voltage signal is converted into a digital signal and output to the control module.
When the battery detection pin (namely, a data end with ADC function connected with the output end of the output voltage detection module) of the control module is divided by the resistor R5 and the resistor R6, and then the normal state of the battery or equipment end is detected, the control module drives the signal pin (namely, the single-chip data end) to output high level, after being divided by the resistor R7 and the resistor R8, the conducting voltage between the B pole and the E pole of the triode Q2 is larger than 0.7V, the triode Q2 is conducted after reaching the conducting condition, the current flows back to the negative pole through the resistor R3, the resistor R4 and the triode Q2 to form a loop, the voltage drop is generated when the current passes through the resistor R3, the E pole and the B pole of the triode Q1 are conducted, the triode Q1 is conducted after being conducted, the N channel MOS tube QL1 and the N channel MOS tube QL2 are powered by the resistor R2 after being divided, and the normal battery charging or equipment is normally output, and otherwise, when the control module battery detection pin passes through the resistor R5 and the resistor R6, the voltage of the battery is not powered by the N channel MOS tube QL2, or the normal state of the device is not powered by the device, and no abnormal signal is output when the control module is not powered, the voltage of the battery detection pin is turned off, or the device is not powered, and the normal state is achieved.
The utility model adopts the N-channel MOSFET to control the on-off of the positive electrode, can charge the battery or work the equipment during normal output, and when the partial pressure of the battery detection pin detects the abnormality of the battery or the equipment end or no battery or no equipment exists, the drive signal pin does not output the level so as to achieve the purpose of turning off the positive electrode, thereby eliminating potential safety hazard and generating no noise during the use process.
Claims (9)
1. A circuit for controlling the turn-off or turn-on of a positive electrode by adopting an N-channel MOSFET is characterized in that: the circuit include switch power module, switch control module, main road power module, switch module, output voltage detection module, power supply interface, system power module and control module, switch power module's power output end is connected with switch control module, main road power module passes through switch module and power supply interface connection, switch control module's control signal output end is connected with switch module's control end, output voltage detection module connects between switch module and power supply interface, system power module's power output end is connected with control module, control module's drive signal output end is connected with switch control module's control end, output voltage detection module's output is connected with control module's detection end.
2. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the switch power supply module comprises a transformer coil T1A, a diode D1 and a capacitor C1, wherein the diode D1 is connected in series to the output end of the transformer coil T1A, and the capacitor C1 is connected between the two output ends of the transformer coil T1A in a bridging manner.
3. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the main circuit power supply module comprises a transformer coil T1B, a diode D2 and a capacitor C2, wherein the diode D2 is connected in series to the output end of the transformer coil T1B, and the capacitor C2 is connected between the two output ends of the transformer coil T1B in a bridging manner.
4. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the system power supply module comprises a transformer coil T1C, a diode D3 and a capacitor C3, wherein the diode D3 is connected in series to the output end of the transformer coil T1C, and the capacitor C3 is connected between the two output ends of the transformer coil T1C in a bridging mode.
5. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the switch control module comprises a triode Q1, a triode Q2, a resistor R3, a resistor R4, a resistor R7 and a resistor R8, wherein one end of the resistor R7 is connected with the base electrode of the triode Q2, the other end of the resistor R7 is connected with the driving signal output end of the control module, the resistor R7 is used as a current limiting resistor, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is connected with the base electrode of the triode Q1 through the resistor R4, the resistor R4 is used as the current limiting resistor, the emitting electrode of the triode Q1 is connected with the power output end of the switch power supply module, the collecting electrode of the triode Q1 is connected with the switch module as the output end of the switch control module, the resistor R3 is connected between the emitting electrode and the base electrode of the triode Q1, and the resistor R8 is connected between the emitting electrode and the base electrode of the triode Q2.
6. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the switch module comprises an N-channel MOS tube QL1, an N-channel MOS tube QL2 and a resistor R1, wherein the drain electrode of the N-channel MOS tube QL1 is connected with the positive electrode of the power output end of the main power supply module, the source electrode of the N-channel MOS tube QL1 is connected with the source electrode of the N-channel MOS tube QL2, the drain electrode of the N-channel MOS tube QL2 is connected with the positive electrode of the power supply interface module, the grid electrodes of the N-channel MOS tube QL1 and the N-channel MOS tube QL2 are connected with the output end of the switch control module through the resistor R2 respectively, the resistor R1 is connected between the grid electrode and the source electrode of the N-channel MOS tube QL1, and the source electrode of the N-channel MOS tube QL2 is connected with the negative electrode of the output end of the switch power supply module.
7. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the power supply interface adopts a rechargeable battery interface or a device interface.
8. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: an exciting coil LF5 is connected in series between the main circuit power supply module and the power supply interface module.
9. The circuit for controlling the turning off or on of a positive electrode using an N-channel MOSFET according to claim 1, wherein: the output voltage detection module comprises a resistor R5 and a resistor R6, the resistor R5 and the resistor R6 are connected in series between the positive electrode and the negative electrode of the power supply interface module, the resistor R5 is connected with the positive electrode of the power supply interface module, the resistor R6 is connected with the negative electrode of the power supply interface module, and the common end of the resistor R5 and the resistor R6 is used as the output end of the output voltage detection module to be connected with the detection end of the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320946517.4U CN219875091U (en) | 2023-04-24 | 2023-04-24 | Circuit for controlling turn-off or turn-on of positive electrode by adopting N-channel MOSFET |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320946517.4U CN219875091U (en) | 2023-04-24 | 2023-04-24 | Circuit for controlling turn-off or turn-on of positive electrode by adopting N-channel MOSFET |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875091U true CN219875091U (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320946517.4U Active CN219875091U (en) | 2023-04-24 | 2023-04-24 | Circuit for controlling turn-off or turn-on of positive electrode by adopting N-channel MOSFET |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219875091U (en) |
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- 2023-04-24 CN CN202320946517.4U patent/CN219875091U/en active Active
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