CN218498842U - Control panel soft start circuit - Google Patents
Control panel soft start circuit Download PDFInfo
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- CN218498842U CN218498842U CN202222099536.6U CN202222099536U CN218498842U CN 218498842 U CN218498842 U CN 218498842U CN 202222099536 U CN202222099536 U CN 202222099536U CN 218498842 U CN218498842 U CN 218498842U
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Abstract
The utility model provides a control panel soft start circuit, include: the device comprises a signal input module, a first switch module and a second switch module, wherein the signal input module comprises a key input unit, an MCU control input unit and a charging input unit, the input end of the MCU control input unit is connected with the output end of a control panel, and the output ends of the key input unit, the MCU control input unit and the charging input unit are all connected with the input end of the first switch module; the utility model has the advantages that: the utility model discloses a key signal input can start power output, and normal back when the system power supply, MCU output keeps power supply circuit normal work, the utility model discloses have the commonality, can improve the life of battery to prevented that many products from adopting the mechanical switch design, caused the condition of battery excessive discharge easily, thereby guaranteed the life of battery, avoided causing the emergence of equipment work unstable phenomenon.
Description
Technical Field
The utility model relates to a soft start circuit technical field especially relates to a control panel soft start circuit.
Background
The control panel is a circuit board, and simple saying, the circuit board that can play control action just can be called the control panel, and the automated production equipment of producer is big, and little to the toy remote control car that the child used, the inside control panel that has all used, the control panel is by battery powered, because many products adopt mechanical switch design, causes the battery to discharge excessively easily to influence the life of battery, then cause equipment work unstable.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a control board soft start circuit for solving the problem of over-discharge of battery easily caused in the prior art.
To achieve the above and other related objects, the present invention provides a control panel soft start circuit, including: the input end of the signal input module is connected with the output end of the control panel, the output end of the signal input module is connected with the input end of the first switch module, the output end of the first switch module is connected with the input end of the second switch module, and the output end of the second switch module is connected with the input end of the control panel power circuit;
the signal input module comprises a key input unit, an MCU control input unit and a charging input unit, wherein the input end of the MCU control input unit is connected with the output end of the control panel, and the output ends of the key input unit, the MCU control input unit and the charging input unit are connected with the input end of the first switch module.
In an embodiment of the present invention, the key input unit includes a first diode, a first key, a second key and a first resistor, an anode of the first diode is connected to the first key through the first resistor, an anode of the first diode is also connected to the second key, and a cathode of the first diode is connected to an input terminal of the first switch module;
the MCU control input unit comprises a second diode, the anode of the second diode is connected with the control end of the control panel, and the cathode of the second diode is connected with the input end of the first switch module;
the charging input unit comprises a third diode and a second resistor, the anode of the third diode is connected with the output end of the charging voltage source through the second resistor, and the cathode of the third diode is connected with the input end of the first switch module.
In an embodiment of the utility model, first switch module includes triode, third resistance and fourth resistance, the base of triode pass through the third resistance with the input of signal input module is connected, the base of triode pass through the fourth resistance with the projecting pole of triode is connected and ground connection, the collecting electrode of triode with second switch module's input is connected.
In an embodiment of the present invention, the second switch module includes a field effect transistor, a fifth resistor and a sixth resistor, the gate of the field effect transistor passes through the fifth resistor and is connected to the output of the first switch module, the gate of the field effect transistor passes through the sixth resistor and is connected to the output of the battery and the source of the field effect transistor, the drain of the field effect transistor and the input of the control panel power circuit.
In an embodiment of the present invention, the triode is an NPN triode, and the fet is a P-channel fet, i.e., a PMOS transistor.
As described above, the utility model discloses a control panel soft start circuit has following beneficial effect:
the utility model discloses a key signal input can start power output, and normal back when the system power supply, MCU output keeps power supply circuit normally to work, the utility model discloses have the commonality, can improve the life of battery to prevented that many products from adopting the mechanical switch design, caused the battery excessive discharge's the condition easily, thereby guaranteed the life of battery, avoided causing the emergence of equipment work unstability phenomenon.
Drawings
Fig. 1 shows a block diagram of the overall structure disclosed in the embodiment of the present invention;
fig. 2 shows a schematic circuit diagram disclosed in an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of the power circuit connected to the control panel according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
Referring to fig. 1, the present invention provides a control board soft start circuit, including: the control panel soft start circuit comprises a data acquisition circuit of the broadcast television transmitting equipment in application, and can also be applied to other equipment in other fields.
Referring to fig. 2, the key input unit includes a first diode, a first key, a second key and a first resistor, the MCU control input unit includes a second diode, and the charging input unit includes a third diode and a second resistor, in this embodiment, the types of the first diode, the second diode and the third diode are all 1N4148, and the first diode D1, the second diode D2 and the third diode D3 are selected as examples to explain below;
the positive electrode of the first diode D1 is connected with the first key PowerSwitch through a first resistor R1, the positive electrode of the first diode D1 is also connected with the second key PowerUP, wherein the first key is a PowerSwitch key, the second key is a PowerUP key, the negative electrode of the first diode D1 is connected with the input end of the first switch module, the positive electrode of the second diode D2 is connected with the control end VCC3.3_ Con of the control panel, the negative electrode of the second diode D2 is connected with the input end of the first switch module, the positive electrode of the third diode D3 is connected with the output end of a charging voltage source through a second resistor R2, the voltage of the charging voltage source is 7.5V, the negative electrode of the third diode D3 is connected with the input end of the first switch module, the first diode D1, the second diode D2 and the third diode D3 are isolation diodes, and the first resistor R1 and the second resistor R2 are used for ensuring that the control panel works in a reliable and stable range of current-limiting resistors.
Referring to fig. 2, the first switch module includes a triode, a third resistor and a fourth resistor, in this embodiment, the types of the triodes are SO13, and the triode Q1 is selected as an example for description;
the base of the triode Q1 is connected with the output end of the signal input module through a third resistor R3, wherein the triode Q1 is an NPN triode, the base of the triode Q1 is connected with the emitting electrode of the triode Q1 through a fourth resistor R4 and is grounded, the collecting electrode of the triode Q1 is connected with the input end of the second switch module, the triode Q1 is one of semiconductor basic components and parts, has a current amplification effect and is a core element of an electronic circuit, the third resistor R3 is a current-limiting resistor and is used for ensuring that the control panel works in a reliable and stable range, and the fourth resistor R4 is arranged for keeping the soft start circuit of the control panel stable.
Referring to fig. 3, the second switch module includes a fet, a fifth resistor, and a sixth resistor, in this embodiment, the type of the fet is IRLNL6401, and the fet Q2 is selected as an example for description;
the grid of field effect transistor Q2 passes through fifth resistance R5 and is connected with the output of first switch module, wherein, field effect transistor Q2 is P channel type field effect transistor, namely PMOS pipe, field effect transistor Q2's grid passes through sixth resistance R6 and is connected with the output of battery and field effect transistor Q2's source respectively, field effect transistor Q2's drain electrode is connected with control panel power supply circuit's input, wherein, field effect transistor Q2 has input resistance height, small in noise, the low power dissipation, dynamic range is big, easily integration, do not have the secondary breakdown phenomenon, advantages such as safe operating area is wide, fifth resistance R5 is the current-limiting resistor, be used for guaranteeing that control panel work is in reliable stable within range, sixth resistance R6 sets up for the stability of protection control panel soft start circuit, this control panel power supply circuit includes first chip U1 and the second chip U2 that charges.
Specifically, the working process is as follows: there are two starting modes, the first charging starting: when a charging voltage source VDD inputs voltage, the triode Q1 is controlled to be conducted through a current limiting resistor of a second resistor R2 and a signal of a third diode D3, the control end voltage of a field effect tube Q2 is reduced, so that the field effect tube Q2 is conducted, a first charging chip U1 and a second charging chip U2 supply power to a system, when the system is started normally, an MCU output control pin VCC3.3_ Con outputs a control signal, and the control signal is output through a second diode D2 to keep the power supply outputting normally;
more specifically, the second is a key start mode: when the panel presses the second button PowerSwitch along the length of the button, a forward voltage is output, the voltage is limited by the first resistor R1 and then passes through the first diode D1 to output a control signal, the control signal is limited by the third resistor R3 and then outputs a control triode Q1, so that the triode Q1 is completely conducted to the ground, after the triode Q1 is conducted, the control end voltage of the field-effect tube Q2 is reduced, the field-effect tube Q2 is conducted, the first charging chip U1 and the second charging chip U2 supply power to the system, when the system is started normally, the MCU outputs a control pin VCC3.3_ Con to output a control signal, the power is normally output through the second diode D2, and when the second button PowerUP is released, the MCU outputs the control pin VCC3.3_ Con to output a high level, so that the normal output of the output power can be ensured.
To sum up, the utility model discloses a key signal input can start power output, and normal back when the system power supply, MCU output keeps power supply circuit normal work, the utility model discloses have the commonality, can improve the life of battery to prevented that many products from adopting the mechanical switch design, caused the condition that the battery excessively discharged easily, thereby guaranteed the life of battery, avoided causing the emergence of equipment work unstable phenomenon. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. A control board soft start circuit, comprising: the input end of the signal input module is connected with the output end of the control panel, the output end of the signal input module is connected with the input end of the first switch module, the output end of the first switch module is connected with the input end of the second switch module, and the output end of the second switch module is connected with the input end of the control panel power circuit;
the signal input module comprises a key input unit, an MCU control input unit and a charging input unit, wherein the input end of the MCU control input unit is connected with the output end of the control panel, and the output ends of the key input unit, the MCU control input unit and the charging input unit are connected with the input end of the first switch module.
2. The control board soft start circuit of claim 1, wherein: the key input unit comprises a first diode, a first key, a second key and a first resistor, wherein the anode of the first diode is connected with the first key through the first resistor, the anode of the first diode is also connected with the second key, and the cathode of the first diode is connected with the input end of the first switch module;
the MCU control input unit comprises a second diode, the anode of the second diode is connected with the control end of the control panel, and the cathode of the second diode is connected with the input end of the first switch module;
the charging input unit comprises a third diode and a second resistor, the anode of the third diode is connected with the output end of the charging voltage source through the second resistor, and the cathode of the third diode is connected with the input end of the first switch module.
3. The control board soft start circuit of claim 1, wherein: the first switch module comprises a triode, a third resistor and a fourth resistor, the base of the triode is connected with the input end of the signal input module through the third resistor, the base of the triode is connected with the emitting electrode of the triode and grounded through the fourth resistor, and the collector of the triode is connected with the input end of the second switch module.
4. The control board soft start circuit of claim 3, wherein: the second switch module comprises a field-effect tube, a fifth resistor and a sixth resistor, the grid electrode of the field-effect tube is connected with the output end of the first switch module through the fifth resistor, the grid electrode of the field-effect tube is connected with the output end of the battery and the source electrode of the field-effect tube through the sixth resistor respectively, and the drain electrode of the field-effect tube is connected with the input end of the control panel power circuit.
5. The control board soft start circuit of claim 4, wherein: the triode is an NPN triode, and the field effect transistor is a P channel type field effect transistor, namely a PMOS (P-channel metal oxide semiconductor) transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222099536.6U CN218498842U (en) | 2022-08-10 | 2022-08-10 | Control panel soft start circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222099536.6U CN218498842U (en) | 2022-08-10 | 2022-08-10 | Control panel soft start circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218498842U true CN218498842U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222099536.6U Active CN218498842U (en) | 2022-08-10 | 2022-08-10 | Control panel soft start circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218498842U (en) |
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- 2022-08-10 CN CN202222099536.6U patent/CN218498842U/en active Active
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