CN210129848U

CN210129848U - Transistor switch control circuit

Info

Publication number: CN210129848U
Application number: CN201920970416.4U
Authority: CN
Inventors: 不公告发明人
Original assignee: Huizhou Tuobang Electric Technology Co Ltd
Current assignee: Huizhou Tuobang Electric Technology Co Ltd; Huizhou Topband Electronic Technology Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-03-06
Anticipated expiration: 2029-06-25

Abstract

The utility model is suitable for the technical field of electronic circuits, and provides a transistor switch control circuit, which comprises a power supply module; the switch module is connected with the power supply module and adopts a P-type transistor; the boost module is connected with the switch module; the controller is connected with the boosting module, works according to the voltage output by the boosting module and controls the back-end circuit connected with the controller to work; the driving module is respectively connected with the power supply module, the boosting module and the controller and drives the power supply module and the boosting module to be communicated according to the control of the controller; when the switch module controls the power supply module to output voltage to the boosting module for boosting, the switch module disconnects the power supply module from the boosting module, the voltage output by the boosting module is provided for the controller to work, and the controller correspondingly controls the driving module to drive and communicate the power supply module and the boosting module when working. The utility model provides a current unable work under the P type transistor low-voltage state make the problem that system circuit can not normally work.

Description

Transistor switch control circuit

Technical Field

The utility model belongs to the technical field of the electronic circuit, especially, relate to a transistor switch control circuit.

Background

In a circuit, a power supply element in the circuit is often subjected to switching control, so that when the power supply element is used, the connection between the power supply element and the circuit is opened, and the normal operation of the circuit is realized.

Then, the output voltage of the positive end of the existing power supply element is gradually reduced due to the loss of electric energy in the using process, wherein on the occasion that the output voltage of the positive end of the power supply element is very low, when the voltage is low to a certain degree, the P-type transistor connected with the power supply element enters an amplification state due to insufficient driving voltage, so that the voltage drop of the P-type transistor is very large, at the moment, the power supply element cannot provide the voltage drop of effective conduction of the P-type transistor, so that the P-type transistor is in a cut-off state, and the power supply element cannot output voltage to the rear end circuit connected with the P-type transistor, so that the whole system circuit cannot normally work.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a transistor switch control circuit aims at solving the problem that can't work makes the system circuit normally work under the current P type transistor low-voltage state.

The embodiment of the utility model provides a realize like this, a transistor switch control circuit, include:

a power supply module;

the switch module is connected with the power supply module and controls the voltage output of the power supply module and adopts a P-type transistor;

the boosting module is connected with the switch module and used for boosting the voltage output by the power supply module;

the controller is connected with the boosting module, works according to the voltage output by the boosting module and controls the back-end circuit connected with the boosting module to work; and

the driving module is respectively connected with the power supply module, the boosting module and the controller and is used for driving and communicating the power supply module and the boosting module according to the control of the controller;

when the switch module controls the power supply module to output voltage to the boosting module for boosting, the switch module disconnects the power supply module from the boosting module, the voltage output by the boosting module is provided for the controller to work, and the controller correspondingly controls the driving module to drive and communicate the power supply module and the boosting module when working.

Further, the switch module includes:

the voltage division unit is connected with the positive end of the power supply module;

the key switch is respectively connected with the voltage division unit and the negative end of the power supply module; and

the P-type transistor is respectively connected with the voltage division unit and the boosting module.

Further, the transistor switch control circuit further comprises:

and the key detection module is respectively connected with the key switch and the controller and used for detecting the key state of the key switch.

Further, the transistor switch control circuit further comprises:

the bias module is connected with the driving module and the controller respectively, the bias module comprises a first bias resistor and a second bias resistor, the two ends of the first bias resistor are connected with the driving module and the controller respectively, the second bias resistor is connected with the driving module, and the other end of the second bias resistor is grounded.

Still further, the boost module includes:

an inductor connected to the switching module and the driving module; and

the first diode and the boost control module are connected with the inductor;

one end of the inductor is connected with the switch module and the driving module, the other end of the inductor is connected with the anode of the first diode and the input end of the boost control module respectively, the cathode of the first diode and the output end of the boost control module are connected with the power supply end of the controller, and the grounding end of the boost control module is grounded.

Furthermore, the driving module is an NMOS transistor, a drain of the NMOS transistor is connected to the positive terminal of the power supply module, a source of the NMOS transistor is connected to the voltage boosting module, and a gate of the NMOS transistor is connected to the controller.

Further, the key detection module comprises:

the second diode is connected with the key switch;

a pull-up resistor and a first capacitor connected to the second diode;

the negative electrode of the second diode is connected with the key switch, the positive electrode of the second diode is respectively connected with the controller, the pull-up resistor and one end of the first capacitor, the other end of the pull-up resistor is connected with the power supply end of the controller, and the other end of the first capacitor is grounded.

Furthermore, the P-type transistor is a PNP-type triode, the voltage dividing unit includes a first voltage dividing resistor and a second voltage dividing resistor, the positive end of the power supply module is connected with the emitter of the PNP-type triode and one end of the first voltage dividing resistor respectively, the other end of the first voltage dividing resistor is connected with one end of the second voltage dividing resistor and the base of the PNP-type triode respectively, the other end of the second voltage dividing resistor is connected with the key switch, and the collector of the PNP-type triode is connected with the voltage boosting module.

Furthermore, the P-type transistor is a PMOS transistor, the voltage dividing unit includes a third voltage dividing resistor, the positive terminal of the power supply module is connected to the source of the PMOS transistor and one end of the third voltage dividing resistor, the other end of the third voltage dividing resistor is connected to the key switch and the gate of the PMOS transistor, and the drain of the PMOS transistor is connected to the voltage boosting module.

Furthermore, the boost module further comprises a second capacitor and a third capacitor, one end of the second capacitor is connected with the switch module and the drive module, the other end of the second capacitor is grounded, one end of the third capacitor is connected with the output end of the boost control module, and the other end of the third capacitor is grounded.

The embodiment of the utility model provides a transistor on-off control circuit, switch module through adopting P type transistor carries out switching on of power module and boost module at system circuit during operation, and boost module output voltage after stepping up to the controller after, the corresponding control drive module of its controller intercommunication power module and boost module for follow-up system circuit no longer needs switch module to work when normal operating, make solve the problem that can't work make system circuit can not normally work under the current P type transistor low-voltage state.

Drawings

Fig. 1 is a block diagram of a transistor switch control circuit according to an embodiment of the present invention;

fig. 2 is a block diagram of a transistor switch control circuit according to another embodiment of the present invention;

fig. 3 is a circuit diagram of a transistor switch control circuit according to another embodiment of the present invention;

fig. 4 is a circuit schematic diagram of a transistor switch control circuit according to another embodiment of the present invention;

fig. 5 is a circuit diagram of a transistor switch control circuit according to still another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model discloses be provided with respectively with power module, the drive module that module and controller are connected steps up, through opening in the system and realize switching on of power module and the module that steps up by switch module in the twinkling of an eye, and the voltage output after the module that steps up to the controller, so that the controller normally works, make the steerable drive module of controller intercommunication power module and the module that steps up, make the work that no longer needs switch module, thereby avoided current switch module who adopts P type transistor can't work under the low-voltage condition and lead to the problem that system circuit can not normally work.

Example one

Referring to fig. 1, which is a schematic block diagram of a transistor switch control circuit according to an embodiment of the present invention, the transistor switch control circuit includes:

a power supply module 20;

a switch module 30 connected with the power supply module 20 and using a P-type transistor 33 for controlling the voltage output of the power supply module 20;

a boost module 40 connected to the switch module 30 and boosting the voltage output from the power supply module 20;

a controller 50 connected to the boosting module 40, operating according to the voltage output from the boosting module 40, and controlling the operation of a rear-end circuit connected thereto; and

a driving module 60 respectively connected to the power supply module 20, the boost module 40, and the controller 50, and configured to drive and communicate the power supply module 20 and the boost module 40 according to the control of the controller 50;

after the switch module 30 controls the power supply module 20 to output the voltage to the voltage boosting module 40 for boosting, the switch module 30 disconnects the power supply module 20 from the voltage boosting module 40, the voltage output by the voltage boosting module 40 is provided to the controller 50 for operation, and the controller 50 correspondingly controls the driving module 60 to drive and connect the power supply module 20 and the voltage boosting module 40 when operating.

In an embodiment of the present invention, specifically, the power supply module 20 may be a battery, which is used for providing voltage output, so that the transistor switch control circuit and the back-end circuit connected thereto implement operation, and when implemented, the power supply module 20 may be a single 1.2V nickel-metal hydride battery, which is used for providing 1.2V voltage output. It is understood that, in other embodiments of the present invention, the power supply module 20 may also be other devices for supplying energy, and is not limited herein.

Further, in an embodiment of the present invention, the switch module 30 is connected with the power supply module 20 and the voltage boosting module 40 respectively, the switch module 30 is used for controlling the on-off state between the power supply module 20 and the voltage boosting module 40, so as to control whether the power supply module 20 outputs the voltage to the voltage boosting module 40, specifically, the switch module 30 includes at least one P-type transistor 33 therein, the P-type transistor 33 is determined whether to be turned on or off according to the voltage drop between the ends thereof, and the switch module can be equivalent to a control switch, and is used for controlling the on-off state between the power supply module 20 and the voltage boosting module 40. Specifically, the P-type transistor 33 may be a PNP transistor or a PMOS transistor.

Further, in an embodiment of the present invention, the boost module 40 is respectively connected with the switch module 30, the driving module 60, and the controller 50, wherein when the switch module 30 controls the power supply module 20 to communicate with the boost module 40, the boost module 40 boosts the voltage output by the power supply module 20 at this time, and outputs the boosted voltage to the controller 50, so that the controller 50 works, in the specific implementation, the boost module 40 can boost the 1.2V voltage output by the power supply module 20 to 3.6V, and output the boosted voltage to the controller 50, wherein the power supply terminal VCC of the controller 50 can realize the normal work of the controller 50 after receiving the 3.6V working voltage output by the boost module 40. It is understood that, in other embodiments of the present invention, the voltage boosted by the voltage boosting module 40 may also be other working voltages for realizing the operation of the controller 50, such as 3.3V, and is not limited herein.

Further, in an embodiment of the present invention, the controller 50 is respectively connected to the voltage boosting module 40 and the driving module 60, wherein the power supply terminal VCC of the controller 50 is connected to the output terminal of the voltage boosting module 40 for receiving the working voltage boosted by the voltage boosting module 40 to work, wherein, it should be pointed out that, the controller 50 can be an MCU when being implemented, each pin terminal thereof is respectively connected to the rear end circuit to be controlled, when the switch module 30 controls the output voltage of the power supply module 20 to the voltage boosting module 40, the voltage boosting module 40 boosts and outputs to the controller 50 to realize the work of the controller 50, the controller 50 starts to work, and controls the corresponding work of the rear end circuit connected thereto.

Further, in an embodiment of the present invention, the driving module 60 is respectively connected to the power supply module 20, the voltage boosting module 40, and the controller 50, wherein the driving module 60 is used for being controlled and driven by the controller 50 to communicate with the power supply module 20 and the voltage boosting module 40, specifically, the controller 50 starts to operate after receiving the voltage output by the voltage boosting module 40, and controls the driving module 60 to communicate with the power supply module 20 and the voltage boosting module 40, and at this time, the power supply module 20 is communicated with the voltage boosting module 40 through the driving module 60, and is not controlled by the switch module 30.

When in use, the switch module 30 can realize continuous conduction or transient conduction between the power supply module 20 and the voltage boost module 40, in the embodiment, when the switch module 30 is implemented specifically, the switch module 30 provides transient conduction between the power supply module 20 and the voltage boost module 40, when the power supply module 20 is conducted with the voltage boost module 40, the voltage boost module 40 boosts the voltage and outputs the voltage to the controller 50, at this time, the controller 50 starts to work and controls the driving module 60 to communicate the power supply module 20 and the voltage boost module 40, so that the power supply module 20 and the voltage boost module 40 are in a stable communication state, and when the voltage of the power supply module 20 is kept within a certain range, the voltage boost module 40 can stably output the working voltage required by the controller 50, so that the controller 50 can be in a stable working state, and the controller 50 can control the driving module 60 to stably communicate the power supply module 20 and the voltage boost module 40, a closed loop is formed where the drive module 60 is controlled by the controller 50. Meanwhile, after the power supply module 20 and the boost module 40 are switched on briefly, the switch module 30 is disconnected from the power supply module 20 and the boost module 40, so that the control is not performed on the power supply module 20 and the boost module 40 any more, at the moment, the switch module 30 only works instantly at the switch, and when a subsequent circuit operates normally, the switch module does not work any more, so that the problem that in the use process of the existing power supply module 20, when the output voltage is insufficient due to the electric energy loss, the effective voltage drop in the P-type transistor 33 in the switch module 30 cannot be provided, the switch module 30 cannot work to drive the rear-end circuit, and the system circuit cannot work is solved.

In this embodiment, switch module through adopting the P type transistor carries out switching on of power module and boost module when system circuit begins work, and boost module output voltage after stepping up to the controller after, the corresponding control drive module of its controller intercommunication power module and boost module, make follow-up system circuit no longer need switch module to work when normal operating, make and solve in the current power module use, when because electric energy loss leads to output voltage not enough, can't provide the effective voltage drop in the P type transistor in the switch module, and the unable work of switch module that leads to drives rear-end circuit, make the unable problem of working of system circuit.

Example two

Please refer to fig. 2 and fig. 3, which are schematic structural diagrams of a transistor switch control circuit according to a second embodiment of the present invention, the second embodiment has a structure substantially the same as that of the first embodiment, and the difference therebetween is that in this embodiment, the switch module 30 includes:

a voltage dividing unit 31 connected to the positive terminal of the power supply module 20;

a key switch 32 connected to the voltage dividing unit 31 and the negative terminal of the power supply module 20, respectively (S1); and

and a P-type transistor 33(Q1) connected to the voltage dividing unit 31 and the boosting module 40, respectively.

The booster module 40 includes:

an inductor L1 connected to the switching module 30 and the driving module 60; and

a first diode D1 and a boost control module Q3 connected with the inductor L1;

one end of an inductor L1 is connected with the switch module 30 and the driving module 60, the other end of the inductor L1 is connected with the anode of the first diode D1 and the input end (Vin) of the boost control module Q3, the cathode of the first diode D1 and the output end (Vout) of the boost control module Q3 are connected with the power supply end VCC of the controller 50, and the ground end (GND) of the boost control module Q3 is grounded.

The driving module 60 is an NMOS transistor, a drain d of the NMOS transistor is connected to a positive terminal (BAT +) of the power supply module 20, a source s of the NMOS transistor is connected to the voltage boosting module 40, and a gate g of the NMOS transistor is connected to the controller 50.

The utility model discloses an embodiment, it is concrete, this power module 20 positive end is connected with switch module 30's partial pressure unit 31, power module 20 negative end is connected with switch module 30's key switch 32, this key switch 32 other end still is connected with partial pressure unit 31, its P type transistor 33 is connected with partial pressure unit 31 and boost module 40 respectively, wherein this key switch 32 is used for realizing the circuit break-make that connects, during this embodiment concrete implementation, this key switch 32 specifically adopts mechanical type key switch 32, it presses the closure to realize switching on of connecting circuit in the twinkling of an eye, realize the disconnection of connecting circuit after the hand is loosened and resumes. It is understood that, in other embodiments of the present invention, the key switch 32 may also be a capacitive switch, or other switches for implementing on/off of a circuit, which is not limited herein. At the moment when the key switch 32 is turned on, the circuit connected thereto is turned on, so that the voltage output by the power supply module 20 flows from the voltage dividing unit 31 to the ground after flowing through the key switch 32, and at this time, the voltage dividing unit 31 divides the voltage, so that a voltage difference is generated across the voltage dividing unit 31, and since two ends of the P-type transistor 33 are connected to the voltage dividing unit 31, the voltage difference generated across the voltage dividing unit 31 when the key switch 32 is turned on can drive the P-type transistor 33 to be turned on, so that the P-type transistor 33 can communicate the power supply module 20 and the voltage boosting module 40, so that the power supply module 20 outputs the voltage to the voltage boosting module 40.

In an embodiment of the present invention, specifically, the P-type transistor 33 in the switch module 30 is connected to one end of an inductor L1 in the boost module 40, the other end of the inductor L1 is connected to the positive electrode of the first triode and the input end of the boost control module Q3, the negative electrode of the first triode and the output end of the boost control module Q3 are connected to the VCC power supply terminal of the controller 50, the ground terminal of the boost control module Q3 is grounded, wherein the boost control module Q3 is turned off by fast and frequent conduction, so that the voltage output by the power supply module 20 can be boosted to the target voltage, specifically, when the boost control module Q3 is turned on, the voltage output by the power supply module 20 flows through the boost control module Q3 to the ground after being output to the inductor L1, and the inductor L1 stores energy at this time; when the boost control module Q3 is turned off, the energy stored in the inductor L1 is superposed with the voltage output by the power supply module 20 and flows through the inductor L1 to the first triode, so that boost is realized. In this embodiment, the first transistor is a freewheeling transistor, and the boost control module Q3 is a DC-DC boost controller 50, which is specifically model number ME2100a 36. It should be noted that, when the voltage input to the voltage boosting module 40 by the power supply module 20 is kept within a certain range, the voltage boosting module 40 can boost the voltage to a stable voltage and output the voltage to the controller 50, so as to realize the stable operation of the controller 50. For example, in the prior art, when the voltage of the power supply module 20 is reduced to the threshold voltage (e.g. 0.8V), the P-type transistor 33 cannot be turned on normally, so that the subsequent circuit cannot work, but when the transistor switch control circuit in this embodiment is adopted, the voltage boost module 40 can still boost the threshold voltage output by the power supply module 20 to the working voltage required by the controller 50 to work normally, so that the controller 50 controls the driving module 50 to turn on the power supply module 20 and the voltage boost module 40. Only when the voltage of the power supply module 40 is reduced to a failure voltage (e.g., 0.5V), the boost module 40 cannot achieve effective boost, and the back-end circuit cannot operate normally due to insufficient power supplied by the power supply module 20.

In an embodiment of the present invention, specifically, this controller 50 is MCU (U1), and its specific model is STM8S103F3P6, and its MCU has a plurality of pins, only shows in the diagram a plurality of pins related to the embodiment of the present invention, and all the other pins are connected with the back-end circuit or the related circuit, and do not limit here. The power supply terminal VCC of the controller 50 is connected to the output terminal of the voltage boost module 40, and is used for passing through the working voltage of the controller 50, wherein the first output pin PD1 of the controller 50 is connected to the driving module 60, specifically, the driving module 60 is an NMOS transistor, at this time, the first output pin PD1 of the controller 50 is connected to the gate g of the NMOS transistor, the drain d of the NMOS transistor is connected to the positive terminal of the power supply module 20, and the source s of the NMOS transistor is connected to the inductor L1 in the voltage boost module 40.

When the power supply module is used, at the moment that the key switch 32 in the switch module 30 is turned on, the voltage dividing unit 31 divides voltage, so that voltage drop for conducting the P-type transistor 33 is generated at two ends of the voltage dividing unit 31, and therefore the P-type transistor 33 is turned on, the power supply module 20 outputs voltage to the voltage boosting module 40 for boosting, the voltage boosting module 40 outputs working voltage to the controller 50 after boosting, so that the power supply terminal VCC of the controller 50 starts to work after being powered on, and controls the first output pin PD1 to output high level, so that a conductive effective voltage drop is formed between the gate g and the source s in the driving module 60, and conduction of the driving module 60 is ensured, so that the driving module 60 is communicated with the power supply module 20 and the voltage boosting module 40, so that the transistor switch control circuit can effectively work, and when the output voltage is insufficient due to power loss in the use process of the existing power supply module 20, the switch module 30 cannot work to drive the back-end circuit due to the failure to provide an effective voltage drop in the P-type transistor of the switch module 30, so that the system circuit cannot work.

EXAMPLE III

The utility model discloses the structure of a transistor switch control circuit that third embodiment provided is the same with the structure of second embodiment, and its difference lies in, and it is shown with reference to fig. 4, and in this embodiment, transistor switch control circuit still includes:

a key detection module 70 connected to the key switch 32 and the controller 50, respectively, for detecting a key state of the key switch 32; and

a biasing module 80 coupled to the drive module 60 and the controller 50, respectively.

The key detection module 70 includes:

a second diode D2 connected to the key switch 32;

a pull-up resistor R1 and a first capacitor C1 connected to the second diode D2;

the cathode of the second diode D2 is connected to the key switch 32, the anode of the second diode D2 is connected to the controller 50, the pull-up resistor R1, and one end of the first capacitor C1, the other end of the pull-up resistor R1 is connected to the power supply terminal VCC of the controller 50, and the other end of the first capacitor C1 is grounded.

The bias module 80 includes a first bias resistor R2 having two ends respectively connected to the driving module 60 and the controller 50, and a second bias resistor R3 connected to the driving module 60, wherein the other end of the second bias resistor R3 is grounded.

In an embodiment of the present invention, the key detection module 70 is used to detect the key status of the key switch 32, specifically, the cathode of the second diode D2 of the key detection module 70 is connected to the key switch 32, and the second diode D2 is an isolation diode, for preventing the voltage in the power supply module 20 connected to the key switch 32 from flowing backward to the controller 50 connected to the key detection module 70. The anode of the second diode D2 is connected to the second input pin PD2 of the controller 50, the pull-up resistor R1, and one end of the first capacitor C1. In particular, the second input pin PD2 of the controller 50 is used for detecting the voltage condition inputted by the key detection module 70, when the controller 50 is normally operated and the key switch 32 is not pressed, since the pull-up resistor R1 is connected to the power supply terminal VCC of the controller 50, the second input pin PD2 of the controller 50 is pulled high, its first capacitor C1 is used for isolation filtering, and its second diode D2 is used for preventing voltage from flowing backward into the controller 50, when the user presses the key switch 32, the circuit to which it is connected, is turned on, causing the voltage at its keyswitch 32 to be pulled low to ground, therefore, a low signal is inputted to the second input pin PD2 of the controller 50, so that the second control pin detects that the key switch 32 is pressed when the voltage is converted from a high level to a low level.

In one embodiment of the present invention, the bias module 80 is connected between the controller 50 and the driving module 60, and is used to provide the electric potential required for the driving module 60 to be turned on. Further, the boost module 40 further includes a second capacitor C2 and a third capacitor C3, one end of the second capacitor C2 is connected to the switch module 30 and the driving module 60, the other end of the second capacitor C2 is grounded, one end of the third capacitor C3 is connected to the output end of the boost control module Q3, and the other end of the third capacitor C3 is grounded, wherein the second capacitor C2 and the third capacitor C3 are both used for filtering, so that the input end and the output end of the boost module 40 can both form stable voltage input and output.

When the key switch 32 is pressed by a user, the switch module 30 turns on the power supply module 20 and the voltage boost module 40, so that the voltage boost module 40 boosts the output voltage of the power supply module 20 and outputs a working voltage to the controller 50, the power supply terminal VCC of the controller 50 is powered and starts to work, the first output pin PD1 is controlled to output a high level, the driving module 60 is connected with the power supply module 20 and the voltage boost module 40, the second input pin PD2 of the controller 50 monitors the voltage output by the key detection module 70 connected thereto in real time, when the user presses the key switch 32 again, the voltage at the key switch 32 is pulled down to ground, so that the key detection module 70 outputs a low level to the second input pin PD2 of the controller 50, and the controller 50 controls the transistor switch control circuit to stop working after acquiring the low level from the second input pin PD2, that is, the first output pin PD1 is controlled to output a low level, so that the driving module 60 stops communicating the power supply module 20 and the voltage boosting module 40, and the power supply terminal VCC of the controller 50 cannot acquire the working voltage, and therefore, the whole transistor switch control circuit and the rear-end circuit connected to the controller 50 both stop working, so that the energy output of the power supply module 20 can be saved, and the low-energy standby mode is realized. It should be noted that, in other embodiments of the present invention, the controller 50 may further implement different functional effects according to the number of times that the user monitored by the key detection module 70 presses the key switch 32, and the specific implementation thereof may perform different programming controls according to actual use requirements, for example, when the controller 50 detects the pressing of the preset number of times within the preset time, the corresponding control is performed to open or close the target rear-end circuit connected thereto, or to perform other situations, which is not limited herein.

Example four

The utility model discloses the structure of a transistor switch control circuit that the fourth embodiment provided is the same with the structure of third embodiment greatly, its difference lies in, it is shown with reference to fig. 4, when this embodiment is specifically implemented, P type transistor 33 is PNP type triode, voltage divider unit 31 includes first divider resistance R4 and second divider resistance R5, power module 20 positive end is connected with the projecting pole e and the first divider resistance R4 one end of PNP type triode respectively, the first divider resistance R4 other end is connected with second divider resistance R5 one end and PNP type triode's base b respectively, the second divider resistance R5 other end is connected with key switch 32, the collecting electrode c and the boost module 40 of PNP type triode are connected.

EXAMPLE five

The utility model discloses the structure of a transistor switch control circuit that the fifth embodiment provided is the same with the structure of third embodiment greatly, its difference lies in, it is shown with reference to fig. 5, when this embodiment is specifically implemented, P type transistor 33 is the PMOS pipe, voltage divider unit 31 includes third voltage divider resistance R6, the power module 20 positive end is connected with the source s and the third voltage divider resistance R6 one end of PMOS pipe respectively, the third voltage divider resistance R6 other end is connected with key switch 32 and the grid g of PMOS pipe respectively, the drain electrode d and the module 40 that steps up of PMOS pipe are connected.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A transistor switch control circuit, the circuit comprising:

a power supply module;

2. The transistor switch control circuit of claim 1, wherein the switching module comprises:

3. The transistor switch control circuit of claim 2, further comprising:

4. The transistor switch control circuit of claim 1, further comprising:

5. The transistor switch control circuit of claim 1, wherein the boost module comprises:

an inductor connected to the switching module and the driving module; and

the first diode and the boost control module are connected with the inductor;

6. The transistor switch control circuit of claim 1, wherein the driving module is an NMOS transistor, a drain of the NMOS transistor is connected to the positive terminal of the power supply module, a source of the NMOS transistor is connected to the boost module, and a gate of the NMOS transistor is connected to the controller.

7. The transistor switch control circuit of claim 3, wherein the key detection module comprises:

the second diode is connected with the key switch;

a pull-up resistor and a first capacitor connected to the second diode;

8. The transistor switch control circuit according to claim 2, wherein the P-type transistor is a PNP-type transistor, the voltage divider unit includes a first voltage divider resistor and a second voltage divider resistor, the positive terminal of the power supply module is connected to an emitter of the PNP-type transistor and one end of the first voltage divider resistor, the other end of the first voltage divider resistor is connected to one end of the second voltage divider resistor and a base of the PNP-type transistor, the other end of the second voltage divider resistor is connected to the key switch, and a collector of the PNP-type transistor is connected to the voltage boost module.

9. The transistor switch control circuit of claim 2, wherein the P-type transistor is a PMOS transistor, the voltage divider unit includes a third voltage divider resistor, the positive terminal of the power supply module is connected to the source of the PMOS transistor and one end of the third voltage divider resistor, the other end of the third voltage divider resistor is connected to the key switch and the gate of the PMOS transistor, and the drain of the PMOS transistor is connected to the voltage boost module.

10. The transistor switch control circuit of claim 5, wherein the boost module further comprises a second capacitor and a third capacitor, one end of the second capacitor is connected to the switch module and the driving module, the other end of the second capacitor is grounded, one end of the third capacitor is connected to the output end of the boost control module, and the other end of the third capacitor is grounded.