CN217769472U - Power supply circuit, power module and movable platform - Google Patents
Power supply circuit, power module and movable platform Download PDFInfo
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- CN217769472U CN217769472U CN202220721926.XU CN202220721926U CN217769472U CN 217769472 U CN217769472 U CN 217769472U CN 202220721926 U CN202220721926 U CN 202220721926U CN 217769472 U CN217769472 U CN 217769472U
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Abstract
The application provides a power supply circuit, a power supply module and a movable platform, wherein the power supply circuit comprises a thermistor, a first switch tube and a control module; the first pole of the first switch tube and one end of the thermistor are both connected to the power supply input end, the second pole of the first switch tube and the other end of the thermistor are both connected to the power supply output end, and the power supply output end is used for connecting a load; the first end of the control module is connected to the power output end, and the second end of the control module is connected to the third end of the first switching tube; the control module is used for monitoring the current voltage of the load, and transmitting a first trigger signal to the first switch tube when the current voltage is greater than a preset voltage threshold value so as to enable the first switch tube to be conducted. After the first switch tube is conducted, the thermistor is equivalently short-circuited, and even if a large-current load is suddenly driven, the voltage drop of a power supply cannot be large, so that the stability of the power supply voltage transmitted to the equipment is ensured, and a fault cannot be caused.
Description
Technical Field
The application relates to the field of circuits, in particular to a power supply circuit, a power supply module and a movable platform.
Background
The device has surge current when being powered on or hot plugged, and if the surge current is not properly processed, the device is damaged and fails. To cope with the inrush current, a power-type NTC thermistor may be generally connected in series on the power input line. Before the power is switched on, the resistance value of the NTC thermistor at normal temperature is larger, which is equivalent to connecting a resistor in series on a circuit; after the power supply is switched on, the NTC thermistor with larger resistance can effectively restrain surge current. And after the current flows through the NTC thermistor, the temperature of the NTC thermistor gradually rises, the resistance value correspondingly drops, when the equipment normally works, the current of the NTC thermistor and the equipment is reasonably matched, and the NTC thermistor is close to a short circuit, so that the power supply stability of the equipment cannot be influenced.
Although the NTC thermistor can play an effective surge current suppression role when being electrified at normal temperature, for equipment which is in a low-current state for a long time and has a sudden high-current load in a working state, the NTC thermistor can possibly make the power supply of the equipment unstable, and even the voltage suddenly decreases to cause a fault. The reason is that the NTC thermistor has a large resistance when the current is small, and when a large-current load is suddenly driven, the temperature rise of the NTC thermistor is delayed, and the time for reducing the resistance is delayed, so that the voltage drop of the NTC thermistor to the power supply in a short time is large, and thus after the NTC thermistor passes through, the voltage of the power supply to the device is greatly reduced, and instability or failure is caused.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a power supply circuit, a power module and a movable platform, so as to at least partially improve the above problems.
In order to achieve the above object, the embodiments of the present application adopt the following technical solutions:
in a first aspect, an embodiment of the present application provides a power supply circuit 10, where the power supply circuit 10 includes a thermistor RT1, a first switching tube Q1, and a control module 100;
a first pole of the first switch tube Q1 and one end of the thermistor RT1 are both connected to a power supply input end, a second pole of the first switch tube Q1 and the other end of the thermistor RT1 are both connected to a power supply output end, and the power supply output end is used for connecting a load;
a first end of the control module 100 is connected to the power output end, and a second end of the control module 100 is connected to a third pole of the first switching tube Q1;
the control module 100 is configured to monitor a current voltage of the load, and transmit a first trigger signal to the first switching tube Q1 when the current voltage is greater than a preset voltage threshold, so that the first switching tube Q1 is turned on.
Optionally, the control module 100 includes a first comparator, a non-inverting input terminal of the first comparator is connected to a power output terminal as a first terminal of the control module 100, an output terminal of the first comparator is connected to a third terminal of the first switch tube as a second terminal of the control module 100, and an inverting input terminal of the first comparator is connected to a reference voltage as a third terminal of the control module 100;
the first comparator is used for outputting a first trigger signal when the current voltage is greater than a preset voltage threshold value, and driving the first switch tube Q1 to be conducted.
Optionally, the control module 100 includes a monitoring unit 101 and a switching unit 102;
a first end of the monitoring unit 101 is used as a first end of the control module 100, a second end of the monitoring unit 101 is connected with a first end of the switching unit 102, and a second end of the switching unit 102 is used as a second end of the control module 100;
the monitoring unit 101 is configured to transmit a second trigger signal to the switching unit 102 when the current voltage is greater than a preset voltage threshold;
the switching unit 102 is configured to transmit the first trigger signal to the first switching tube Q1 when receiving the second trigger signal.
Optionally, the monitoring unit 101 includes a first resistor R1 and a first voltage regulator tube Z1;
one end of the first resistor R1 is connected to the negative electrode of the first voltage-regulator tube Z1, the positive electrode of the first voltage-regulator tube Z1 serves as the second end of the monitoring unit 101, and the other end of the first resistor R1 serves as the first end of the monitoring unit 101;
the voltage threshold is a reverse breakdown threshold of the first voltage regulator tube.
Optionally, the monitoring unit 101 further includes a second resistor R2;
one end of the second resistor R2 is connected to the anode of the first voltage-regulator tube Z1, and the other end of the second resistor R2 is grounded.
Optionally, the first switch Q1 is a PMOS transistor, the third pole of the first switch Q1 is a gate, the first pole of the first switch Q1 is a source, the second pole of the first switch Q1 is a drain, and the switching unit 102 includes a third resistor R3, a fourth resistor R4, and a second switch Q2;
one end of the third resistor R3 is connected to one end of the fourth resistor R4, the other end of the third resistor R3 is connected to the power input end, the other end of the fourth resistor R4 is connected to the second pole of the second switch Q2, the first pole of the second switch Q2 is used as the first end of the switching unit 102, the third pole of the second switch Q2 is grounded, and a connection terminal is led out from a connection part between the third resistor R3 and the fourth resistor R4 to form a second end of the switching unit 102.
Optionally, the switching unit 102 further includes a first capacitor C1 connected in parallel with the third resistor R3.
Optionally, the switching unit 102 further includes a fifth resistor R5;
one end of the fifth resistor R5 is connected between the third resistor R3 and the fourth resistor R4, and the other end of the fifth resistor R5 is used as the second end of the switching unit 102.
Optionally, the power supply circuit 10 further includes a second voltage regulator tube Z2;
the negative electrode of the second voltage-stabilizing tube Z2 is connected to the power input end, and the positive electrode of the second voltage-stabilizing tube Z2 is grounded.
In a second aspect, an embodiment of the present application provides a power supply module, which includes the power supply circuit described in any one of the foregoing items.
In a second aspect, the present application provides a movable platform, which includes the power module described above.
Compared with the prior art, the power supply circuit, the power supply module and the movable platform provided by the embodiment of the application comprise a thermistor, a first switching tube and a control module; the first pole of the first switch tube and one end of the thermistor are both connected to the power supply input end, the second pole of the first switch tube and the other end of the thermistor are both connected to the power supply output end, and the power supply output end is used for connecting a load; the first end of the control module is connected to the power output end, and the second end of the control module is connected to the third end of the first switching tube; the control module is used for monitoring the current voltage of the load, and transmitting a first trigger signal to the first switch tube when the current voltage is greater than a preset voltage threshold value so as to enable the first switch tube to be conducted. After the first switch tube is conducted, the thermistor is equivalently short-circuited, and even if a large-current load is suddenly driven, the voltage drop of a power supply cannot be large, so that the stability of the power supply voltage transmitted to the equipment is ensured, and a fault cannot be caused.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and it will be apparent to those skilled in the art that other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a power supply circuit provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a control module 100 according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of the monitoring unit 101 and the switching unit 102 according to an embodiment of the present application.
In the figure: 10-a power supply circuit; 100-a control module; 101-a monitoring unit; 102-switching unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either 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 this application will be understood to be a specific case for those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
It should be understood that, because of the delay of the resistance change of the NTC thermistor RT1, when the device suddenly drives a large current load, the voltage drop of the NTC thermistor RT1 to the power supply in a short time is large, and the voltage of the power supply to the device after passing through the NTC thermistor RT1 is greatly reduced, which causes instability or failure.
To overcome the above problems, the present embodiment provides a power supply circuit 10, which can be applied in a movable platform, and the movable platform terminal equipment can be a drone or an unmanned vehicle or other surveying equipment, but is not limited thereto. As shown in fig. 1, the power supply circuit 10 includes a thermistor RT1, a first switch tube Q1, and a control module 100; a first pole of the first switch tube Q1 and one end of the thermistor RT1 are both connected to a POWER supply input end (POWER _ IN), a second pole of the first switch tube Q1 and the other end of the thermistor RT1 are both connected to a POWER supply output end (POWER _ OUT), and the POWER supply output end is used for being connected with a load; a first terminal of the control module 100 is connected to the power output terminal, and a second terminal of the control module 100 is connected to the third pole of the first switch Q1.
The control module 100 is configured to monitor a current voltage of the load, and transmit a first trigger signal to the first switching tube Q1 when the current voltage is greater than a preset voltage threshold, so that the first switching tube Q1 is turned on.
It will be appreciated that the POWER supply input (POWER _ IN) is connected to a POWER supply and the POWER supply output (POWER _ OUT) is connected to a load, which may be powered by the POWER supply circuit 10.
In a possible implementation manner, the first switch tube Q1 may be a relay, a transistor, an NMOS, a PMOS, or the like, and the first switch tube Q1 may be switched between a conducting state and a blocking state. It should be understood that when the present voltage is greater than the preset voltage threshold, it indicates that the power-on operation has been completed, and at this time, the current and voltage tend to be stable, and the possibility of the occurrence of the surge phenomenon is very low. In order to avoid the problem that the NTC thermistor RT1 has a large voltage drop to the power supply in a short time when the device suddenly drives a large current load, the first switch Q1 needs to be turned on. It should be understood that the resistance of the first switch tube Q1 after being turned on is far less than the resistance of the thermistor RT1 in the low current working state, so that after the first switch tube Q1 is turned on, the short circuit is performed on the thermistor RT1, and even if a large current load is suddenly driven, the voltage drop of the power supply is not large, so that the stability of the power supply voltage transmitted to the device is ensured, and the fault is not caused.
It should be understood that when the device is powered on and started or hot plugged, the current voltage of the load is 0 or close to 0, the current voltage is smaller than the preset voltage threshold, the first switching tube Q1 is in an off state, the power supply supplies power to the load through the thermistor RT1, and the thermistor RT1 can effectively reduce the surge effect.
Note that the second capacitor C2 in fig. 1 is an equivalent capacitance of the load. The voltage difference between the two poles of the second capacitor C2 is the current voltage of the load.
In summary, in the power supply circuit provided in the above embodiment of the present application, the control module 100 monitors the current voltage of the load, and transmits the first trigger signal to the first switch tube Q1 when the current voltage is greater than the preset voltage threshold, so that the first switch tube Q1 is turned on. So that after first switch tube Q1 switched on, carried out the short circuit to thermistor in other words, even drive heavy current load suddenly this moment, also can not lead to the voltage drop of power very big yet to guarantee to transmit the mains voltage stability of equipment, can not cause the trouble.
The embodiment of the present application also provides a possible implementation manner for the structure of the control module 100 in fig. 1. The control module 100 includes a first comparator, a non-inverting input terminal of the first comparator is connected to a power output terminal as a first end of the control module 100, an output terminal of the first comparator is connected to a third pole of the first switching tube Q1 as a second end of the control module 100, an inverting input terminal of the first comparator is connected to a reference voltage (a preset voltage threshold) as a third end of the control module 100, the first comparator outputs a high level when a current voltage of a load is higher than the reference voltage (the preset voltage threshold), the first switching tube Q1 is driven to conduct, and the first switching tube Q1 may be a relay or a triode.
Referring to fig. 2, the control module 100 includes a monitoring unit 101 and a switching unit 102.
A first end of the monitoring unit 101 is connected to the power output end as a first end of the control module 100, a second end of the monitoring unit 101 is connected to a first end of the switching unit 102, and a second end of the switching unit 102 is connected to a third pole of the first switch Q1 as a second end of the control module 100.
The monitoring unit 101 is configured to transmit a second trigger signal to the switching unit 102 when the current voltage is greater than a preset voltage threshold. The second trigger signal may be a current signal or a level signal.
The switching unit 102 is configured to transmit a first trigger signal to the first switch tube Q1 when receiving the second trigger signal.
In a possible implementation manner, the third terminal of the switching unit 102 is connected to the power input terminal, and the fourth terminal of the switching unit 102 is grounded as the third terminal of the control module 100. Certainly, the third terminal of the switching unit 102 may also be connected to a second power supply, and the second power supply is configured to provide a first trigger signal to the first switching tube Q1 when the switching unit 102 is turned on, so that the first switching tube Q1 is turned on.
For example, the switching unit 102 is composed of a reference power supply and a third switching tube, and a first pole of the third switching tube is connected to a second end of the monitoring unit 101 as a first end of the switching unit; the second terminal of the switching unit, which is the second terminal of the third switching transistor, is connected to the third terminal of the first switching transistor Q1, the third terminal of the third switching transistor is connected to the reference power supply, and the third switching transistor may be a PNP triode. The first pole of the third switching tube is a base electrode, the second pole of the third switching tube is a collector electrode, and the third pole of the third switching tube is an emitting electrode.
It should be understood that, when the current voltage is greater than the preset voltage threshold, the monitoring unit 101 transmits a second trigger signal to the switching unit 102, where the second trigger signal is a low level signal, and at this time, the emitter voltage of the third switch tube is higher than the base voltage, and the third switch tube is turned on, and applies a driving signal to the first switch tube Q1, so as to turn on the first switch tube Q1. The first switch tube Q1 may be an NPN transistor, a relay, and a solid-state relay.
On the basis of fig. 2, regarding the structure of the monitoring unit 101, the embodiment of the present application further provides a possible implementation manner, please refer to fig. 3, in which the monitoring unit 101 includes a first resistor R1 and a first voltage regulator tube Z1; one end of the first resistor R1 is connected to the negative electrode of the first voltage regulator tube Z1, the positive electrode of the first voltage regulator tube Z1 is used as the second end of the monitoring unit 101, and the other end of the first resistor R1 is used as the first end of the monitoring unit 101; based on this, the voltage threshold may be a reverse breakdown threshold of the first regulator tube.
It should be understood that the positive electrode of the first zener tube Z1 is connected to the first end of the switching unit 102 as the second end of the monitoring unit 101; the other end of the first resistor R1 is connected to the power output terminal as the first end of the monitoring unit 101. It should be understood that when the present voltage is greater than the reverse breakdown threshold of the first regulator tube Z1, a current may flow to the switching unit 102 through the first regulator tube Z1, where the generated current signal is the second trigger signal.
In one possible implementation, the monitoring unit 101 may also be implemented using a comparator and a reference voltage.
With continuing reference to fig. 3, in order to reduce the false triggering probability of the first switch tube Q1, the embodiment of the present application further provides a possible implementation manner, as shown in fig. 3, the monitoring unit 101 further includes a second resistor R2; one end of the second resistor R2 is connected to the anode of the first voltage regulator tube Z1, and the other end of the second resistor R2 is grounded.
In some cases, there may be very small leakage current in the first regulator tube Z1, and when the leakage current is accumulated for a long time, the switching unit 102 may be triggered by mistake, so that the first switch tube Q1 may be triggered by mistake. Based on this, by adding the second resistor R2 to consume the leakage current, the switching unit 102 can be prevented from being triggered by mistake, and the probability of triggering by mistake of the first switch tube Q1 is reduced.
Referring to fig. 3, in a case that the first switch Q1 is a PMOS transistor, the third pole of the first switch Q1 is a gate, the first pole of the first switch Q1 is a source, and the second pole of the first switch Q1 is a drain, the embodiment of the present application further provides a possible implementation manner regarding the structure of the switching unit 102, as shown in fig. 3, the switching unit 102 includes a third resistor R3, a fourth resistor R4, and a second switch Q2.
One end of the third resistor R3 is connected to one end of the fourth resistor R4, the other end of the third resistor R3 is connected to the power input end, the other end of the fourth resistor R4 is connected to the second pole of the second switch Q2, the first pole of the second switch Q2 is used as the first end of the switching unit 102, the third pole of the second switch Q2 is grounded, wherein a connection terminal is led out from the connection between the third resistor R3 and the fourth resistor R4 to form the second end of the switching unit 102.
As shown in fig. 3, the first pole of the second switching tube Q2 is connected to the positive pole of the first regulator tube Z1. It should be understood that when the second switch transistor Q2 is turned off, the gate and the source of the PMOS transistor (the first switch transistor Q1) have the same voltage, and the PMOS transistor is in the off state; when the second switch Q2 is turned on, the voltage of the gate of the PMOS transistor is lower than that of the source because of the voltage division of the third resistor R3 and the fourth resistor R4, and at this time, the PMOS transistor is turned on. The second switching tube Q2 may be a relay, an NMOS tube, or a transistor, and although fig. 3 shows that the second switching tube Q2 is a transistor, the invention is not limited thereto.
When the second switch Q2 is an NPN transistor, a first pole of the second switch Q2 is a base, a second pole of the second switch Q2 is a collector, and a third pole of the second switch Q2 is an emitter.
It should be noted that the first switching tube Q1 may be not only a PMOS, but also a replacement of other devices or module circuits with the same low on-resistance, such as a triode PNP, or an NMOS tube and an NPN triode with a boost drive, or a relay and a solid-state relay. When the types of the first switching tubes Q1 are different, the devices in the control module 100 may be adaptively adjusted.
Referring to fig. 3, in order to further protect the power supply circuit, a possible implementation manner is provided in the embodiment of the present application, as shown in fig. 3, the switching unit 102 further includes a first capacitor C1 connected in parallel with the third resistor R3.
Specifically, the first pole of the first capacitor C1 is connected to one end of the third resistor R3, and the second pole of the first capacitor C1 is connected to the other end of the third resistor R3.
It should be understood that, when the second switch tube Q2 is turned on, the first capacitor C1 is charged with energy, and the first capacitor C1 can play a role in buffering, so as to avoid causing a large impact on the first switch tube Q1.
Referring to fig. 3, in order to further protect the power supply circuit, a possible implementation manner is further provided in the embodiment of the present application, as shown in fig. 3, the switching unit 102 further includes a fifth resistor R5.
One end of the fifth resistor R5 is connected between the third resistor R3 and the fourth resistor R4, and the other end of the fifth resistor R5 serves as a second end of the switching unit 102.
It should be understood that the fifth resistor R5 may play a role in buffering to avoid an excessive current, thereby playing a role in protecting the first switch tube Q1.
Referring to fig. 3, in order to further protect the power supply circuit, a possible implementation manner is provided in the embodiment of the present application, as shown in fig. 3, the power supply circuit 10 further includes a second regulator tube Z2.
The negative pole of the second voltage-regulator tube Z2 is connected to the power input end, and the positive pole of the second voltage-regulator tube Z2 is grounded.
It should be understood that the second regulator tube Z2 can protect the power supply circuit to prevent the surge current from damaging the power supply circuit when the power supply circuit is turned on.
In one possible embodiment, the first zener diode Z1 may be a zener diode, and the second zener diode Z2 may be a TVS diode.
As shown IN fig. 3, at the instant of powering on the device, the voltage Uout is 0V, the transistor Q2 is IN the off state, the PMOS transistor Q1 is IN the off state, the POWER supply _ IN charges the capacitor C1 (device POWER supply capacitor, i.e. load equivalent capacitor) through the thermistor RT1, and the surge current is suppressed by the thermistor RT 1. The second voltage regulator tube Z2 at the input end can be used for absorbing excessive surge current to prevent the surge current from raising the Uin voltage to break down the Q1 tube. C2 And charging to increase the Uout voltage, and when the Uout voltage increases to the first voltage-regulator tube Z1 and is conducted, the voltage of U2 increases, Q2 starts to be conducted, the voltage of U1 decreases, and Q1 starts to be conducted. When the voltage of U1 drops low enough and Q1 is fully conducted, current will basically pass through Q1, and the current of RT1 drops and returns to near normal temperature. At this time, the output voltage Uout can be stably maintained by passing through the low internal resistance Q1 basically regardless of the change of the device current.
The embodiment of the present application further provides a power module, which includes the above power supply circuit 10.
The embodiment of the application also provides a movable platform which comprises the power supply module. The movable platform may be a drone or an unmanned vehicle or other surveying equipment.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (11)
1. A power supply circuit is characterized by comprising a thermistor, a first switching tube and a control module;
the first pole of the first switch tube and one end of the thermistor are both connected to a power supply input end, the second pole of the first switch tube and the other end of the thermistor are both connected to a power supply output end, and the power supply output end is used for being connected with a load;
the first end of the control module is connected to the power output end, and the second end of the control module is connected to the third pole of the first switching tube;
the control module is used for monitoring the current voltage of the load, and transmitting a first trigger signal to the first switch tube when the current voltage is greater than a preset voltage threshold value so as to enable the first switch tube to be conducted.
2. The power supply circuit according to claim 1, wherein the control module comprises a first comparator, a non-inverting input terminal of the first comparator is connected to a power output terminal as a first terminal of the control module, an output terminal of the first comparator is connected to a third terminal of the first switch tube as a second terminal of the control module, and an inverting input terminal of the first comparator is connected to a reference voltage as a third terminal of the control module;
the first comparator is used for outputting a first trigger signal when the current voltage is larger than a preset voltage threshold value so as to drive the first switch tube to be conducted.
3. The power supply circuit according to claim 1, wherein the control module includes a monitoring unit and a switching unit;
a first end of the monitoring unit is used as a first end of the control module, a second end of the monitoring unit is connected with a first end of the switching unit, and a second end of the switching unit is used as a second end of the control module;
the monitoring unit is used for transmitting a second trigger signal to the switching unit when the current voltage is greater than a preset voltage threshold;
the switching unit is used for transmitting the first trigger signal to the first switching tube under the condition of receiving the second trigger signal.
4. The power supply circuit of claim 3 wherein said monitoring unit comprises a first resistor and a first voltage regulator;
one end of the first resistor is connected with the negative electrode of the first voltage-stabilizing tube, the positive electrode of the first voltage-stabilizing tube is used as the second end of the monitoring unit, and the other end of the first resistor is used as the first end of the monitoring unit;
the voltage threshold is a reverse breakdown threshold of the first voltage regulator tube.
5. The power supply circuit of claim 4 wherein said monitoring unit further comprises a second resistor;
one end of the second resistor is connected to the anode of the first voltage-regulator tube, and the other end of the second resistor is grounded.
6. The power supply circuit according to claim 3, wherein the first switch is a PMOS transistor, the third pole of the first switch is a gate, the first pole of the first switch is a source, the second pole of the first switch is a drain, and the switching unit comprises a third resistor, a fourth resistor and a second switch;
one end of the third resistor is connected with one end of the fourth resistor, the other end of the third resistor is connected with the power input end, the other end of the fourth resistor is connected with the second pole of the second switch tube, the first pole of the second switch tube is used as the first end of the switching unit, the third pole of the second switch tube is grounded, and a connecting terminal is led out from the joint between the third resistor and the fourth resistor to form the second end of the switching unit.
7. The power supply circuit of claim 6 wherein the switching unit further comprises a first capacitor in parallel with a third resistor.
8. The power supply circuit according to claim 6, wherein the switching unit further includes a fifth resistor;
one end of the fifth resistor is connected between the third resistor and the fourth resistor, and the other end of the fifth resistor is used as the second end of the switching unit.
9. The power supply circuit of claim 6 wherein said power supply circuit further comprises a second regulator tube;
and the cathode of the second voltage-stabilizing tube is connected to the power input end, and the anode of the second voltage-stabilizing tube is grounded.
10. A power supply module comprising a power supply circuit as claimed in any one of claims 1 to 9.
11. A movable platform, characterized in that it comprises a power supply module according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220721926.XU CN217769472U (en) | 2022-03-29 | 2022-03-29 | Power supply circuit, power module and movable platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220721926.XU CN217769472U (en) | 2022-03-29 | 2022-03-29 | Power supply circuit, power module and movable platform |
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| CN217769472U true CN217769472U (en) | 2022-11-08 |
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| CN202220721926.XU Active CN217769472U (en) | 2022-03-29 | 2022-03-29 | Power supply circuit, power module and movable platform |
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| CN (1) | CN217769472U (en) |
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