CN219658053U - Drive control circuit and electronic device - Google Patents

Abstract

The utility model is applicable to the technical field of drive control, and provides a drive control circuit and electronic equipment. The driving control circuit comprises a control module and a switch module. The switch module is used for being connected between the output end of the driving chip and the electronic equipment, and is also used for being conducted according to the conducting signal output by the control module, so that the driving chip is connected with the electronic equipment, and the driving signal is output to the electronic equipment. The input end of the control module is used for being connected with a power supply, the output end of the control module is connected with the control end of the switch module, and the control module is used for sending a turn-off signal to the switch module when the power supply voltage is smaller than a preset voltage so as to disconnect the switch module. The control module is also used for sending a conduction signal to the switch module when the power supply voltage is greater than or equal to the preset voltage so as to conduct the switch module. The drive control circuit can avoid the drive signal output by the drive chip when the power supply voltage is not stable, so that the electronic equipment is damaged, and the anti-interference capability of the drive chip is improved.

Description

Drive control circuit and electronic device

Technical Field

The utility model belongs to the technical field of drive control, and particularly relates to a drive control circuit and electronic equipment.

Background

The driving chip is connected with the power supply and receives the power supply voltage output by the power supply. When the power supply voltage is greater than or equal to the input threshold voltage of the driving chip, the driving chip is started, and a driving signal is output to the electronic equipment after the driving chip is started.

However, in the related art, the input threshold voltage of some driving chips is related to the magnitude of the supply voltage. When the power supply voltage is not increased and tends to be stable, the input threshold voltage of the driving chip is small, and false start is caused under the action of an interference signal. Therefore, the anti-interference capability of the driving chip is weak, which easily leads to damage of the electronic device.

Disclosure of Invention

The utility model provides a driving control circuit and electronic equipment, which can solve the problems that the anti-interference capability of a driving chip is weak and the electronic equipment is easy to damage.

In a first aspect, an embodiment of the present utility model provides a driving control circuit, configured to be connected between a driving chip and an electronic device, where a power supply end of the driving chip is configured to be connected to a power supply, and when the driving chip receives that a power supply voltage of the power supply is greater than or equal to an input threshold voltage of the driving chip, a driving signal is output through an output end of the driving chip, where the driving control circuit includes a control module and a switch module;

the switch module is used for being connected between the output end of the driving chip and the electronic equipment, and is also used for being conducted according to the conduction signal output by the control module, so that the driving chip is connected with the electronic equipment, and the driving signal is output to the electronic equipment;

the input end of the control module is used for being connected with the power supply, the output end of the control module is connected with the control end of the switch module, and the control module is used for sending a turn-off signal to the switch module when the power supply voltage is smaller than a preset voltage so as to disconnect the switch module; the control module is further configured to send a turn-on signal to the switch module when the power supply voltage is greater than or equal to the preset voltage, so that the switch module is turned on.

In one embodiment, the control module includes a first driving unit, a second driving unit, and a first switching unit;

the control end of the first driving unit is used as an input end of the control module and is used for being connected with the power supply, the first end of the first driving unit is connected with the control end of the first switch unit, and the second end of the first driving unit is grounded; the first end of the first switch unit is used for being connected with the power supply, and the second end of the first switch unit is connected with the control end of the second drive unit; the first end of the second driving unit is used as an output end of the control module and is connected with the control end of the switch module, and the second end of the second driving unit is grounded.

In one embodiment, the first driving unit includes a first voltage division unit, a second voltage division unit and a driving subunit, a first end of the first voltage division unit is used for being connected with the power supply, a second end of the first voltage division unit is respectively connected with a control end of the driving subunit and a first end of the second voltage division unit, a second end of the driving subunit and a second end of the second voltage division unit are both grounded, and a first end of the driving subunit is connected with a control end of the first switch unit.

In one embodiment, the driving subunit includes a controllable precise voltage stabilizing source, a control end of the controllable precise voltage stabilizing source is respectively connected to the second end of the first voltage dividing unit and the first end of the second voltage dividing unit, a first conducting end of the controllable precise voltage stabilizing source is connected to the control end of the first switch unit, and a second conducting end of the controllable precise voltage stabilizing source is grounded; the first voltage dividing unit comprises at least one first resistor, and the second voltage dividing unit comprises at least one second resistor.

In one embodiment, the first switch unit includes a third resistor and a first triode, an emitter of the first triode is used for being connected with the power supply, a base of the first triode is connected with the first end of the first driving unit, a collector of the first triode is connected with the control end of the second driving unit, and the third resistor is connected between the emitter of the first triode and the base of the first triode.

In one embodiment, the second driving unit includes a fourth resistor and a second triode, an emitter of the second triode is grounded, a base of the second triode is connected to the second end of the first switching unit, a collector of the second triode is connected to the control end of the switching module, and the fourth resistor is connected between the emitter of the second triode and the base of the second triode.

In one embodiment, the control module includes a comparator, a positive input end of the comparator is used for being connected with the power supply, a negative input end of the comparator is used for being connected with a preset power supply, and an output end of the comparator is used for being connected with a control end of the switch module, wherein the preset power supply is used for outputting the preset voltage.

In one embodiment, the switch module includes a relay, a control end of the relay is connected to an output end of the control module, a first end of the relay is used for being connected to an output end of the driving chip, and a second end of the relay is used for being connected to the electronic device.

In one embodiment, the switching module includes a switching tube, a control end of the switching tube is connected to an output end of the control module, a first end of the switching tube is used for being connected to an output end of the driving chip, and a second end of the switching tube is used for being connected to the electronic device.

In a second aspect, an embodiment of the present utility model further provides an electronic device, including the drive control circuit according to any one of the first aspects.

When the power supply voltage output by the power supply is greater than or equal to the preset voltage, the control module controls the switch module to be turned on, and the driving chip drives the electronic equipment to work. And when the power supply voltage is smaller than the preset voltage, sending a turn-off signal to the switch module to disconnect the switch module, so that the drive chip and the electronic equipment are disconnected. Even if the driving chip sends out the driving signal under the action of the interference signal, the driving signal cannot be transmitted to the electronic equipment, so that the driving chip is prevented from being started by mistake under the action of the interference signal when the power supply voltage of the driving chip is not increased and tends to be stable, the driving chip outputs the driving signal to the electronic equipment, and the electronic equipment is damaged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic block diagram of a drive control circuit according to an embodiment of the present utility model;

FIG. 2 is a schematic block diagram of a drive control circuit provided in another embodiment of the present utility model;

FIG. 3 is a schematic circuit diagram of a driving control circuit according to an embodiment of the present utility model;

FIG. 4 is a schematic circuit diagram of a driving control circuit according to another embodiment of the present utility model;

FIG. 5 is a schematic circuit diagram of a driving control circuit according to another embodiment of the present utility model;

fig. 6 is a schematic block diagram of an electronic device according to an embodiment of the present utility model.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

In the related art, the input threshold voltage of some driving chips is related to the magnitude of the supply voltage, and when the supply voltage has not increased and tends to be stable, the input threshold voltage of the driving chips is smaller, so that false start is performed under the action of an interference signal. Or, the driving chip with a smaller input threshold voltage is also easily affected by the interference signal, so that a false start phenomenon occurs. Therefore, in the related art, the anti-interference capability of the driving chip is weak, and the driving chip is easy to be started by mistake under the action of the interference signal, so that the driving signal is sent to the electronic equipment by mistake, and when the electronic equipment receives the wrong driving signal, the electronic equipment is easy to be damaged due to the wrong starting, and meanwhile, part of circuit elements in the electronic equipment are damaged when receiving the wrong driving signal.

Based on the above problems, an embodiment of the present utility model provides a driving control circuit, which includes a control module and a switch module.

In order to illustrate the technical scheme of the utility model, the following description is made by specific examples.

Fig. 1 shows a schematic block diagram of a drive control circuit 10 according to an embodiment of the present utility model. Referring to fig. 1, the driving control circuit includes a control module and a switching module.

Specifically, the driving control circuit 10 provided in the embodiment of the present utility model is used for being connected between the driving chip 20 and the electronic device 40. The switch module 102 is used to connect between the output of the driver chip 20 and the electronic device 40. The input end of the control module 101 is used for being connected with the power supply 30, and the output end of the control module 101 is connected with the control end of the switch module 102.

The input end of the control module 101 is configured to receive the power supply voltage output by the power supply 30, and send a turn-off signal to the switch module 102 when the power supply voltage is less than a preset voltage, so that the switch module 102 is turned off, and thus the driver chip 20 and the electronic device 40 are turned off. The electronic device 40 cannot receive the driving signal output from the driving chip 20, and thus, the electronic device 40 cannot start operation. The control module 101 is further configured to send a turn-on signal to the switch module 102 when the power supply voltage is greater than or equal to a preset voltage, so that the switch module 102 is turned on, and thus the driver chip 20 and the electronic device 40 are turned on. The electronic device 40 can receive the driving signal output from the driving chip 20, and thus, the electronic device 40 can normally start up the operation.

As can be seen from the above, when the power supply voltage output by the power supply 30 of the driving control circuit 10 provided by the embodiment of the utility model is greater than or equal to the preset voltage, the control module 101 controls the switch module 102 to be turned on, and the driving chip 20 drives the electronic device 40 to work. When the power supply voltage is less than the preset voltage, a turn-off signal is sent to the switch module 102 to turn off the switch module 102, thereby turning off the driving chip 20 and the electronic device 40. Even if the driving chip 20 sends out a driving signal under the action of an interference signal, the driving signal cannot be transmitted to the electronic equipment 40, so that the situation that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable is avoided, the driving chip 20 outputs the driving signal to the electronic equipment 40, and the electronic equipment 40 is damaged is caused.

It should be noted that the preset voltage may be selected according to a characteristic curve of the power supply voltage output by the power supply 30 with time. For example, the characteristic curve of the power supply voltage changing with time gradually increases from zero and finally tends to stabilize, and the corresponding voltage when the power supply voltage is stabilized can be determined as the preset voltage. When the power supply voltage gradually increases from zero but does not reach the preset voltage, the control module 101 sends a turn-off signal to the switch module 102, so that the switch module 102 is turned off, and the driving chip 20 and the electronic device 40 are turned off. The electronic device 40 cannot receive the driving signal output by the driving chip 20, and cannot start up normally. When the power supply voltage is stable and reaches the preset voltage, the control module 101 sends a conducting signal to the switch module 102 to conduct the switch module 102, so that the driving chip 20 and the electronic device 40 are conducted, and the electronic device 40 can receive the driving signal output by the driving chip 20, and then normally start to work.

For example, the designer may choose the preset voltage according to the actual situation. For example, the preset voltage may be set to 1.65V. That is, when the power supply voltage is greater than or equal to 1.65V, the control module 101 sends a turn-on signal to the switch module 102 to turn on the switch module 102, thereby turning on between the driving chip 20 and the electronic device 40. The electronic device 40 may receive the driving signal output by the driving chip 20, and then normally start the operation. It is known that the supply voltage is smaller than the preset voltage in the process of gradually increasing the supply voltage, that is, in the process of increasing the supply voltage from 0 to 1.65V. Therefore, the switch module 102 is always in the off state, the electronic device 40 cannot receive the driving signal output by the driving chip 20, so that the phenomenon that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable, so that the driving chip 20 outputs the driving signal to the electronic device 40, and the electronic device 40 is damaged is avoided. The scheme of the utility model can improve the anti-interference capability of the driving chip 20 and avoid the damage of the electronic equipment 40.

It should be noted that, in the related art, the driving chip 20 is connected to the power supply 30 and receives the power supply voltage output by the power supply 30, and when the power supply voltage is greater than or equal to the input threshold voltage of the driving chip 20, the driving chip 20 is started, and outputs a driving signal to the electronic device 40 after the start. However, since the input threshold voltage of some driving chips 20 is related to the magnitude of the supply voltage, when the supply voltage has not increased and tends to be stable, the input threshold voltage of the driving chip 20 is smaller, which results in false start under the action of the interference signal. The embodiment of the present utility model provides the driving control circuit 10, and when the power supply voltage reaches the preset voltage, the control module 101 controls the switch module 102 to be turned on, so that the driving chip 20 is turned on with the electronic device 40, and the electronic device 40 can receive the driving signal output by the driving chip 20, so as to normally start the operation. Therefore, the phenomenon that the driving chip 20 outputs the driving signal to the electronic equipment 40 to cause the damage of the electronic equipment 40 is avoided when the power supply voltage of the driving chip 20 is not increased and tends to be stable, and the anti-interference capability of the driving chip 20 can be improved by utilizing the scheme of the utility model, so that the damage of the electronic equipment 40 is avoided.

Fig. 2 shows a schematic block diagram of a drive control circuit 10 according to another embodiment of the present utility model. Referring to fig. 2, the control module 101 includes a first driving unit 1011, a second driving unit 1012, and a first switching unit 1013.

The control end of the first driving unit 1011 is used as the input end of the control module 101 for connecting to the power supply 30, the first end of the first driving unit 1011 is connected to the control end of the first switch unit 1013, and the second end of the first driving unit 1011 is grounded. A first terminal of the first switch unit 1013 is connected to the power supply 30, and a second terminal of the first switch unit 1013 is connected to a control terminal of the second driving unit 1012. The first end of the second driving unit 1012 is used as an output end of the control module 101 and is connected with the control end of the switch module 102, and the second end of the second driving unit 1012 is grounded.

Specifically, the control terminal of the first driving unit 1011 is configured to receive the power supply voltage output by the power supply 30, and when the power supply voltage is greater than or equal to the preset voltage, the first driving unit 1011 sends a first signal to the control terminal of the first switching unit 1013. The first switching unit 1013 is turned on according to the first signal, and the first switching unit 1013 transmits the first switching signal to the second driving unit 1012 when turned on. The second driving unit 1012 is turned on according to the first switching signal, and sends a turn-on signal to the switching module 102 to turn on the switching module 102. When the power supply voltage is less than the preset voltage, the first driving unit 1011 transmits a second signal to the control terminal of the first switching unit 1013. The first switching unit 1013 is turned off according to the second signal, and the first switching unit 1013 transmits the second switching signal to the second driving unit 1012 when turned off. The second driving unit 1012 is turned off according to the second switching signal, and sends a turn-off signal to the switching module 102, so that the switching module 102 is turned off, the driving chip 20 is turned off from the electronic device 40, and the electronic device 40 cannot receive the driving signal output by the driving chip 20. As can be seen from this, when the power supply voltage is greater than or equal to the preset voltage, the switch module 102 is in the on state, and the driving chip 20 drives the electronic device 40 to operate. When the power supply voltage is less than the preset voltage, the switch module 102 is in an off state, so that the driving chip 20 and the electronic device 40 are disconnected. Even if the driving chip 20 sends out a driving signal under the action of an interference signal, the driving signal cannot be transmitted to the electronic equipment 40, so that the situation that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable is avoided, the driving chip 20 outputs the driving signal to the electronic equipment 40, and the electronic equipment 40 is damaged is caused.

Fig. 3 is a schematic circuit diagram illustrating a driving control circuit 10 according to an embodiment of the utility model. Referring to fig. 3, the first driving unit 1011 includes a first voltage dividing unit 10111, a second voltage dividing unit 10112, and a driving subunit 10113. A first end of the first voltage dividing unit 10111 is used as a control end of the first driving unit 1011 and is used for being connected with the power supply VCC1, and a second end of the first voltage dividing unit 10111 is respectively connected with a control end of the driving subunit 10113 and a first end of the second voltage dividing unit 10112. The second terminal of the driving sub-unit 10113 and the second terminal of the second voltage dividing unit 10112 serve as the second terminal of the first driving unit 1011, and are grounded, and the first terminal of the driving sub-unit 10113 serves as the first terminal of the first driving unit 1011, and is connected to the control terminal of the first switching unit 1013.

Specifically, the first voltage dividing unit 10111 is used for limiting and dividing voltage, so as to prevent the power supply voltage outputted by the power supply VCC1 from being excessively large, and influence the driving subunit 10113. The second voltage division unit 10112 is connected to the control end of the driving subunit 10113, and is used for dividing voltage, so as to avoid the erroneous conduction and the malfunction of the driving subunit 10113. The power supply voltage outputted from the power supply VCC1 is divided by the first voltage dividing unit 10111 and the second voltage dividing unit 10112 and then transmitted to the control terminal of the driving subunit 10113, and the control terminal of the driving subunit 10113 compares the received voltage signal with a preset voltage and turns on or off according to the comparison result, thereby controlling the on or off of the first switch unit 1013.

As shown in fig. 3, in one embodiment, the driving subunit 10113 includes a controllable precision voltage stabilizing source U2, where a control end of the controllable precision voltage stabilizing source U2 is used as a control end of the driving subunit 10113 and is connected to a second end of the first voltage dividing unit 10111 and a first end of the second voltage dividing unit 10112 respectively. The first conducting terminal of the controllable precision voltage stabilizing source U2 is used as a first terminal of the driving subunit 10113, and is connected to the control terminal of the first switch unit 1013. The second conducting terminal of the controllable precision voltage stabilizing source U2 is used as the second terminal of the driving subunit 10113, and is grounded. The first voltage division unit 10111 includes at least one first resistor R1, and the second voltage division unit 10112 includes at least one second resistor R2.

Specifically, the control end of the controllable precise voltage-stabilizing source U2 is used as an input reference end of the controllable precise voltage-stabilizing source U2, and when the voltage signal received by the control end of the controllable precise voltage-stabilizing source U2 is greater than or equal to the set reference voltage of the controllable precise voltage-stabilizing source U2, the controllable precise voltage-stabilizing source U2 is turned on. When the voltage signal received by the control end of the controllable precise voltage stabilizing source U2 is smaller than the set reference voltage of the controllable precise voltage stabilizing source U2, the controllable precise voltage stabilizing source U2 is cut off. The first resistors R1 in the first voltage dividing unit 10111 are used for current limiting and voltage dividing, and a proper resistance value and a proper number of first resistors R1 can be selected as the first voltage dividing unit 10111 according to the power supply voltage output by the power supply VCC 1. The second resistor R2 in the second voltage division unit 10112 is used for dividing voltage, so as to prevent misleading of the controllable precise voltage stabilizing source U2, and a proper resistance value and a proper number of second resistors R2 can be selected as the second voltage division unit 10112 according to the magnitude of the power supply voltage and the resistance value of the first resistor R1.

For example, a designer may choose the model number and the reference voltage value of the controllable precision voltage-stabilizing source U2 according to the actual situation. For example, a controllable precision regulated supply U2 having model TL431 and a reference voltage of 2.5V is selected. When the voltage signal received by the control end of the controllable precision voltage stabilizing source U2 is greater than or equal to the reference voltage (2.5V), the controllable precision voltage stabilizing source U2 is in a conductive state, so as to control the first switch unit 1013 to be conductive. The designer can select the resistance and the number of the first resistor R1 and the resistance and the number of the second resistor R2 according to the actual situation, which is not limited in the present utility model. Meanwhile, in order to conveniently adjust the resistance of the first voltage division unit 10111 and the resistance of the second voltage division unit 10112, a designer may select two sliding varistors to replace the first resistor R1 and the second resistor R2, and adjust the resistance of the two sliding varistors according to the actual requirement of the circuit.

It should be noted that, the resistance values of the first resistor R1 and the second resistor R2 may be selected by adjusting the preset voltage. After the controllable precise voltage stabilizing source U2 in the control module 101 is determined, the resistance values of the first resistor R1 and the second resistor R2 may be determined according to the power supply voltage, the set reference voltage and the preset voltage of the controllable precise voltage stabilizing source U2.

It should be noted that only one element is shown as the driving subunit 10113 in the present utility model, and it is not meant to be a representation that only one element can implement the function of the driving subunit 10113. Other elements that can perform this function may be substituted, and are not limited thereto.

As shown in fig. 3, in one embodiment, the first switching unit 1013 includes a third resistor R3 and a first transistor Q1. The emitter of the first triode Q1 is used as a first end of the first switch unit 1013 and is connected with the power supply VCC1, the base of the first triode Q1 is used as a control end of the first switch unit 1013 and is connected with the first end of the first driving unit 1011, and the collector of the first triode Q1 is used as a second end of the first switch unit 1013 and is connected with a control end of the second driving unit 1012. The third resistor R3 is connected between the emitter of the first transistor Q1 and the base of the first transistor Q1.

Specifically, the third resistor R3 is connected in series between the base of the first triode Q1 and the emitter of the first triode Q1, and is used for reducing static or dynamic signals, preventing saturation distortion, and has the functions of increasing input impedance and limiting current, so that the first triode Q1 can be prevented from being turned on by mistake, and the stability of the first triode Q1 is improved. The first transistor Q1 is configured to send a first switching signal to the control terminal of the second driving unit 1012 when the controllable precision voltage-stabilizing source U2 in the first driving unit 1011 is turned on (the controllable precision voltage-stabilizing source U2 is turned on between the first terminal and the second terminal). The first transistor Q1 is further configured to send a second switching signal to the control terminal of the second driving unit 1012 when the controllable precision voltage regulator source U2 in the first driving unit 1011 is not turned on (the controllable precision voltage regulator source U2 is disconnected between the first terminal and the second terminal).

When the controllable precise voltage stabilizing source U2 is conducted, the base electrode of the first triode Q1 is grounded, and the voltage between the emitter electrode and the base electrode of the first triode Q1 is greater than or equal to the conducting voltage of the first triode Q1, so that the first triode Q1 is conducted. When the controllable precision voltage stabilizing source U2 in the first driving unit 1011 is not turned on, the voltage between the emitter and the base of the first triode Q1 is smaller than the turn-on voltage of the first triode Q1, thereby turning off the first triode Q1.

For example, a designer may select the type of the first transistor Q1 according to the actual situation, for example, a PNP transistor may be selected, or a P-type MOS transistor may be selected. The designer can select the model of first triode Q1 according to actual conditions.

It should be noted that only one circuit configuration is shown as the first switch unit 1013 in the present utility model, and it is not represented that only one circuit configuration can implement the function of the first switch unit 1013. Other elements that can perform this function may be substituted, and are not limited thereto.

As shown in fig. 3, in one embodiment, the second driving unit 1012 includes a fourth resistor R4 and a second transistor Q2. The emitter of the second triode Q2 is used as the second end of the second driving unit 1012 and grounded, the base of the second triode Q2 is used as the control end of the second driving unit 1012 and connected with the second end of the first switching unit 1013, and the collector of the second triode Q2 is used as the first end of the second driving unit 1012 and connected with the control end of the switching module 102. The fourth resistor R4 is connected between the emitter of the second transistor Q2 and the base of the second transistor Q2.

Specifically, the fourth resistor R4 is connected in series between the base of the second triode Q2 and the emitter of the second triode Q2, and is used for reducing static or dynamic signals, preventing saturation distortion, and has the functions of increasing input impedance and limiting current, so that misleading of the second triode Q2 can be prevented, and the stability of the second triode Q2 is improved. The second transistor Q2 is configured to send an on signal to the switch module 102 when the first transistor Q1 is on, and is further configured to send an off signal to the switch module 102 when the first transistor Q1 is off.

When the first triode Q1 is turned on, the voltage between the base and the emitter of the second triode Q2 is greater than or equal to the turn-on voltage of the second triode Q2, so that the second triode Q2 is turned on. When the first transistor Q1 is not turned on, the voltage between the base and the emitter of the second transistor Q2 is smaller than the turn-on voltage of the second transistor Q2, so that the second transistor Q2 is turned off.

For example, a designer may select the type of the second triode Q2 according to the actual situation, for example, an NPN transistor may be selected, or an N-type MOS transistor may be selected. The designer can select the model of second triode Q2 according to actual conditions.

It should be noted that only one circuit configuration as the second driving unit 1012 is shown in the present utility model, and it is not meant to be a representation that only one circuit configuration can realize the function of the second driving unit 1012. Other elements that can perform this function may be substituted, and are not limited thereto.

In one embodiment, a voltage stabilizing circuit is disposed between the power supply 30 and the ground terminal, so that the voltage input to the driving chip 20 is more stable, and the reliability of the driving control circuit 10 is improved.

As shown in fig. 3, in one embodiment, the voltage stabilizing circuit includes a first capacitor C1, which can filter the ac component in the power supply VCC1, so that the voltage input to the driving chip 20 is more stable, avoiding interference to the driving control circuit 10, and improving the reliability of the driving control circuit 10.

As shown in fig. 3, in one embodiment, switch module 102 includes a relay RY1, a control terminal of relay RY1 being coupled to an output terminal of control module 101, a first terminal of relay RY1 being configured to be coupled to an output terminal of drive chip 20, and a second terminal of relay RY1 being configured to be coupled to electronic device 40.

Specifically, the control terminal of the relay RY1 is configured to receive a control signal output by the control module 101, and is turned on or turned off according to the control signal. When the second triode Q2 is turned on, the first end of the coil of the relay RY1 is grounded, the second end of the coil of the relay RY1 is connected with the second power supply VCC2, so that the coil of the relay RY1 is electrified, and the relay RY1 closes the switch part. The electronic device 40 can receive the driving signal output by the output end of the driving chip 20, so as to ensure the normal operation of the electronic device 40. When the second transistor Q2 is turned off, no current passes through the coil of the relay RY1, and the switching section of the relay RY1 is turned off. The electronic device 40 cannot receive the driving signal output by the output end of the driving chip 20, so that the phenomenon that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable, and the driving chip 20 outputs the driving signal to the electronic device 40, so that the electronic device 40 is damaged is avoided.

It should be noted that, as shown in fig. 4, the switching module 102 includes a switching tube Q3, a control end of the switching tube Q3 is connected to an output end of the control module 101, a first end of the switching tube Q3 is connected to an output end of the driving chip 20, and a second end of the switching tube Q3 is connected to the electronic device 40.

Specifically, the control end of the switching tube Q3 is configured to receive a control signal output by the control module 101, and is turned on or turned off according to the control signal. When the second triode Q2 is turned on, the gate of the switching tube Q3 is grounded, and the voltage between the source and the gate of the switching tube Q3 is greater than or equal to the turn-on voltage of the switching tube Q3, so that the switching tube Q3 is turned on, that is, the source and the drain of the switching tube Q3 are turned on. At this time, the output end of the driving chip 20 is conducted with the electronic device 40, and the electronic device 40 can receive the driving signal output by the output end of the driving chip 20, so as to ensure the normal operation of the electronic device 40. When the second transistor Q2 is turned off, the voltage between the source and the gate of the switching transistor Q3 is smaller than the on voltage of the switching transistor Q3, so that the switching transistor Q3 is turned off, i.e., the source and the drain of the switching transistor Q3 are turned off. At this time, the output terminal of the driving chip 20 is disconnected from the electronic device 40. The electronic device 40 cannot receive the driving signal output by the output end of the driving chip 20, so that the phenomenon that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable, and the driving chip 20 outputs the driving signal to the electronic device 40, so that the electronic device 40 is damaged is avoided.

For example, a designer may select the type of the switch tube Q3 according to the actual situation, for example, a P-type MOS tube may be selected. The designer may also select a triode to replace the MOS transistor, and the type and model of the components of the switch module 102 are not limited in the present utility model.

In the present utility model, only two elements, namely, relay RY1 and switching tube Q3, are shown as switching module 102, and it is not intended that only these two elements can realize the function of switching module 102. Other elements that can perform this function may be substituted, and are not limited thereto.

As shown in fig. 5, in one embodiment, the control module 101 includes a comparator U3, a positive input terminal of the comparator U3 is used for being connected to a power supply VCC1, a negative input terminal of the comparator U3 is used for being connected to a preset power supply VCC3, and an output terminal of the comparator U3 is used for being connected to a control terminal of the switch module 102, where the preset power supply VCC3 is used for outputting a preset voltage.

Specifically, the positive input end of the comparator U3 is configured to receive the supply voltage output by the supply power VCC1, and the negative input end of the comparator U3 is configured to receive the preset voltage output by the preset power VCC 3. When the supply voltage is greater than or equal to the preset voltage, the output end of the comparator U3 outputs a first comparison signal to the switch module 102, and the switch module 102 is turned on according to the first comparison signal, so that the output end of the driving chip 20 is turned on with the electronic device 40. The electronic device 40 can receive the driving signal output by the output end of the driving chip 20, so as to ensure the normal operation of the electronic device 40. When the power supply voltage is smaller than the preset voltage, the output end of the comparator U3 outputs a second comparison signal to the switch module 102, and the switch module 102 is turned off according to the second comparison signal, so that the output end of the driving chip 20 is turned off from the electronic device 40. The electronic device 40 cannot receive the driving signal output by the output end of the driving chip 20, so that the phenomenon that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable, and the driving chip 20 outputs the driving signal to the electronic device 40, so that the electronic device 40 is damaged is avoided.

It should be noted that, in fig. 5, the switching transistor Q3 is an N-type MOS transistor, and when the first comparison signal output from the output terminal of the comparator U3 is a high level signal, the switching transistor Q3 is turned on, so that the output terminal of the driving chip 20 is turned on with the electronic device 40. The electronic device 40 can receive the driving signal output by the output end of the driving chip 20, so as to ensure the normal operation of the electronic device 40. When the second comparison signal output from the output terminal of the comparator U3 is a low level signal, the switching tube Q3 is turned off. The electronic device 40 cannot receive the driving signal output by the output end of the driving chip 20, so that the phenomenon that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable, and the driving chip 20 outputs the driving signal to the electronic device 40, so that the electronic device 40 is damaged is avoided.

It should be noted that only one element of the comparator U3 as the control module 101 is shown in the present utility model, and it is not meant to represent that only one element can implement the function of the control module 101. Other elements that can perform this function may be substituted, and are not limited thereto.

The utility model also discloses an electronic device 40, as shown in fig. 6, the electronic device 40 comprises the driving control circuit 10. In the present embodiment, the drive control circuit 10 is provided as a part of the electronic device 40. By adopting the driving control circuit 10 in the electronic device 40, the phenomenon that the driving chip 20 is started by mistake under the action of the interference signal when the power supply voltage of the driving chip 20 is not increased and tends to be stable, so that the driving chip 20 outputs the driving signal to the electronic device 40, the rear-stage circuit connected with the driving control circuit in the electronic device 40 is damaged, and the reliability of the electronic device 40 is improved.

Since the processes and functions implemented by the electronic device in this embodiment basically correspond to the embodiments, principles and examples of the driving control circuit 10, the description of this embodiment is not exhaustive, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.

Claims (10)

1. The driving control circuit is characterized by being connected between a driving chip and electronic equipment, wherein a power end of the driving chip is used for being connected with a power supply, and when the driving chip receives that the power supply voltage of the power supply is greater than or equal to the input threshold voltage of the driving chip, a driving signal is output through an output end of the driving chip, and the driving control circuit comprises a control module and a switch module;

the switch module is used for being connected between the output end of the driving chip and the electronic equipment, and is also used for being conducted according to the conduction signal output by the control module, so that the driving chip is connected with the electronic equipment, and the driving signal is output to the electronic equipment;

the input end of the control module is used for being connected with the power supply, the output end of the control module is connected with the control end of the switch module, and the control module is used for sending a turn-off signal to the switch module when the power supply voltage is smaller than a preset voltage so as to disconnect the switch module; the control module is further configured to send a turn-on signal to the switch module when the power supply voltage is greater than or equal to the preset voltage, so that the switch module is turned on.

2. The drive control circuit of claim 1, wherein the control module comprises a first drive unit, a second drive unit, and a first switch unit;

the control end of the first driving unit is used as an input end of the control module and is used for being connected with the power supply, the first end of the first driving unit is connected with the control end of the first switch unit, and the second end of the first driving unit is grounded; the first end of the first switch unit is used for being connected with the power supply, and the second end of the first switch unit is connected with the control end of the second drive unit; the first end of the second driving unit is used as an output end of the control module and is connected with the control end of the switch module, and the second end of the second driving unit is grounded.

3. The drive control circuit according to claim 2, wherein the first drive unit includes a first voltage dividing unit, a second voltage dividing unit, and a drive subunit, a first end of the first voltage dividing unit is used for connecting the power supply, a second end of the first voltage dividing unit is connected to a control end of the drive subunit and a first end of the second voltage dividing unit, both the second end of the drive subunit and the second end of the second voltage dividing unit are grounded, and a first end of the drive subunit is connected to a control end of the first switch unit.

4. The drive control circuit according to claim 3, wherein the driving subunit includes a controllable precision voltage stabilizing source, a control end of the controllable precision voltage stabilizing source is connected to the second end of the first voltage dividing unit and the first end of the second voltage dividing unit, a first conducting end of the controllable precision voltage stabilizing source is connected to the control end of the first switch unit, and a second conducting end of the controllable precision voltage stabilizing source is grounded; the first voltage dividing unit comprises at least one first resistor, and the second voltage dividing unit comprises at least one second resistor.

5. The drive control circuit of claim 2, wherein the first switching unit includes a third resistor and a first triode, an emitter of the first triode is used for being connected with the power supply, a base of the first triode is connected with a first end of the first driving unit, a collector of the first triode is connected with a control end of the second driving unit, and the third resistor is connected between the emitter of the first triode and the base of the first triode.

6. The drive control circuit of claim 2, wherein the second drive unit includes a fourth resistor and a second triode, an emitter of the second triode is grounded, a base of the second triode is connected to the second end of the first switch unit, a collector of the second triode is connected to the control end of the switch module, and the fourth resistor is connected between the emitter of the second triode and the base of the second triode.

7. The drive control circuit of claim 1, wherein the control module comprises a comparator, a positive input of the comparator is used for being connected with the power supply, a negative input of the comparator is used for being connected with a preset power supply, and an output of the comparator is used for being connected with a control end of the switch module, wherein the preset power supply is used for outputting the preset voltage.

8. The drive control circuit of claim 1, wherein the switch module comprises a relay, a control terminal of the relay is connected to an output terminal of the control module, a first terminal of the relay is connected to an output terminal of the drive chip, and a second terminal of the relay is connected to the electronic device.

9. The drive control circuit of claim 1, wherein the switching module comprises a switching tube, a control end of the switching tube is connected to an output end of the control module, a first end of the switching tube is used for being connected to an output end of the driving chip, and a second end of the switching tube is used for being connected to the electronic device.

10. An electronic device comprising the drive control circuit of any one of claims 1-9.