CN214953814U - Power-on detection circuit and electronic equipment - Google Patents
Power-on detection circuit and electronic equipment Download PDFInfo
- Publication number
- CN214953814U CN214953814U CN202023352038.5U CN202023352038U CN214953814U CN 214953814 U CN214953814 U CN 214953814U CN 202023352038 U CN202023352038 U CN 202023352038U CN 214953814 U CN214953814 U CN 214953814U
- Authority
- CN
- China
- Prior art keywords
- switch tube
- power
- voltage
- detection
- detection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
The application discloses power-on detection circuit and electronic equipment, the circuit includes: a voltage input terminal and a ground terminal; the detection module comprises a detection end, and the detection end is connected with the voltage input end through a first divider resistor; the signal generation module comprises a first switch tube and a second switch tube, wherein the first switch tube is arranged between the detection end and a grounding end, and the second switch tube is arranged between the voltage input end and the control end of the first switch tube; the control end of the second switch tube is grounded through the first capacitor. According to the power-on state detection method and device, the detection module can accurately know the power-on state, the signal generation module can resist overvoltage impact input from the outside, and the fault rate of electronic equipment can be reduced.
Description
Technical Field
The present disclosure relates to temperature detection, and particularly to a power-on detection circuit and an electronic device.
Background
Generally, an electronic device is provided with a power-on detection circuit to detect whether the circuit is powered on, and if so, the electronic device executes operations related to power-on, such as running a functional program of a single chip microcomputer.
In the conventional power-on detection circuit, as shown in fig. 1, the power-on detection circuit generally adopts a resistor voltage division manner, and after power is turned on, a detection end of a detection module, for example, a detection end in an MCU, detects a voltage rising edge at a point B between a resistor R10 and a resistor R20, and at this time, whether the current electronic device is powered on can be determined by detecting the voltage rising edge.
However, electronic devices are easily affected by external input voltage during charging, and sometimes overvoltage impact may occur due to unstable components or external voltage, for example, the input voltage is too high or surge voltage is input, and at this time, the MCU is easily burned out by a general resistance voltage division method, resulting in a high failure rate of electronic products.
SUMMERY OF THE UTILITY MODEL
The application provides a power-on detection circuit and electronic equipment, can reduce electronic equipment's fault rate, solves protection circuit and deals with the problem of overvoltage impact.
In order to solve the above problem, an embodiment of the present application provides a power-on detection circuit, where the circuit includes:
a voltage input terminal VCC and a ground terminal;
the detection module comprises a detection end, and the detection end is connected with the voltage input end VCC through a first divider resistor;
the signal generation module comprises a first switch tube and a second switch tube, wherein the first switch tube is arranged between the detection end and a grounding end, and the second switch tube is arranged between a voltage input end Power Up and a control end of the first switch tube;
the control end of the second switch tube is grounded through the first capacitor.
In an embodiment, the first switch tube and the second switch tube are transistors or MOS tubes.
In an embodiment, a second voltage-dividing resistor is disposed between the control end of the first switch tube and the second switch tube, and the second voltage-dividing resistor is connected in parallel with a second capacitor.
In an embodiment, a third voltage dividing resistor is further disposed between the control end of the first switch tube and the second switch tube.
In an embodiment, a fourth voltage dividing resistor is disposed between the control terminal and the ground terminal of the first switch tube.
In an embodiment, the second switch tube is a triode, a fifth voltage-dividing resistor is arranged between an emitter and a base of the second switch tube, and a sixth voltage-dividing resistor is arranged between the base of the second switch tube and the first capacitor.
In an embodiment, the first switch tube is an NPN-type transistor, and the second switch tube is a PNP-type transistor.
An embodiment of the present application further provides an electronic device, including the power-on detection circuit according to any one of the above embodiments.
Therefore, in the power-on detection circuit and the electronic device, by arranging the signal generation module, the first switch tube and the second switch tube in the signal generation module are matched with the first capacitor to generate the detection signal related to power-on, so that the detection module can accurately know the power-on condition, the signal generation module can resist overvoltage impact of external input, and the failure rate of the electronic device can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a power-on detection circuit provided in the prior art.
Fig. 2 is a schematic structural diagram of a power-on detection circuit provided in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 2, a structure of a power-on detection circuit according to an embodiment of the present disclosure is shown.
As shown in fig. 2, the Power-on detection circuit includes voltage input terminals (VCC, Power Up), a ground terminal, a detection module 1, and a signal generation module 2.
The voltage input terminals (VCC, Power Up) may be voltage sources set according to the detection requirement of the detection module 1.
The detection module 1 includes a detection terminal, and may be connected to the voltage input terminal VCC through a first voltage dividing resistor R1. Specifically, the detection module 1 may be an MCU (Micro Controller Unit), wherein a point B may be set between a detection end of the MCU and the first voltage dividing resistor R1 to detect a voltage value between the point B and a ground end.
It is understood that the detection module 1 may also be other detection modules 1 besides MCU, such as DPS, etc., which is not limited in this application.
The signal generating module 2 comprises a first switch tube and a second switch tube, wherein the first switch tube is arranged between the detection end and the grounding end, and the second switch tube is arranged between the voltage input end Power Up and the control end of the first switch tube; the control terminal of the second switch tube is grounded through a first capacitor C1.
The signal generating module 2 is used for generating a power-on signal when power is on. Wherein, this first switch tube and second switch tube can be triode or MOS pipe, and the switching action through triode or MOS pipe comes control signal's production, specifically adopts triode or MOS pipe to design according to the circuit demand of difference.
In an embodiment, the second switch tube is a triode, a fifth voltage-dividing resistor R5 is disposed between an emitter and a base of the second switch tube, and a sixth voltage-dividing resistor R6 is disposed between the base of the second switch tube and the first capacitor C1. Through the cooperation of the fifth voltage-dividing resistor R5 and the sixth voltage-dividing resistor R6, the reliability of signal jump in the signal generation module 2 can be improved.
Specifically, the first switch tube is an NPN-type triode, and the second switch tube is a PNP-type triode. It is understood that the specific type or type of the triode can be determined according to the actual use requirement, and the triode is not limited in this application.
In the working process, when the power-on moment occurs, the first capacitor C1 is charged, the second switch tube is conducted, and the first switch tube is further conducted. At this time, the voltage at the point B is pulled low by the first switch tube, and the detection module 1 detects a low level.
When the first capacitor C1 is fully charged, the second switch tube is turned off, so that the first switch tube is turned off. At this time, the voltage at point B is pulled high, and the detection module 1 detects a high level.
The detection module 1 detects the level change of the point B, so that whether the power-on action occurs can be quickly judged. In addition, when overvoltage impact such as surge voltage is input, the first switching tube and the second switching tube are used for protection, so that the detection module 1 can be effectively prevented from being damaged due to the influence of the overvoltage impact input, and the failure rate of the power-on detection circuit and the electronic equipment thereof is reduced.
In an embodiment, a second voltage-dividing resistor R2 is disposed between the control terminal of the first switch tube and the second switch tube, and the second voltage-dividing resistor R2 is connected in parallel with a second capacitor C2. The second voltage-dividing resistor R2 and the second capacitor C2 can improve the voltage current-limiting capability during overvoltage impact, and prevent the first switch tube and the second switch tube from being damaged.
In another embodiment, a third voltage-dividing resistor R3 is further disposed between the control terminal of the first switch tube and the second switch tube, and the third voltage-dividing resistor R3 can also enhance the protection of the first switch tube and the second switch tube.
In a specific circuit, a fourth voltage-dividing resistor R4 is disposed between the control terminal and the ground terminal of the first switch tube, and the response speed of the first switch tube can be increased by the fourth voltage-dividing resistor R4.
By additionally arranging the signal generation module 2 with the first switch tube and the second switch tube and adopting the impedance design of the application, the detection module 1 can be effectively prevented from being influenced by overvoltage impact such as surge voltage input, and the reliability of the power-on detection module 1 is further improved.
Referring to fig. 3, a structure of an electronic device according to an embodiment of the present disclosure is shown.
As shown in fig. 3, the electronic device 10 includes a power-on detection circuit 20, and the power-on detection circuit 20 may be connected between an input power source and a load, and further determine whether the load is powered on by receiving a current/voltage signal of the input power source.
The power-on detection circuit 20 in the electronic device 10 may be the power-on detection circuit 20 provided in any of the above embodiments, and the detection module detects the level change of the point B, so as to quickly determine whether a power-on action occurs.
In addition, when overvoltage shock such as surge voltage is input, the first switching tube and the second switching tube are used for protection, so that the detection module can be effectively prevented from being damaged due to the influence of the overvoltage shock input, and the failure rate of the power-on detection circuit 20 and the electronic device 10 thereof is reduced.
It can be understood that, for the specific implementation of the power-on detection circuit, reference may be made to the above-mentioned embodiments, and details of the present application are not described herein again.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (8)
1. A power-up detection circuit, the circuit comprising:
a voltage input terminal VCC and a ground terminal;
the detection module comprises a detection end, and the detection end is connected with the voltage input end VCC through a first divider resistor;
the signal generation module comprises a first switch tube and a second switch tube, wherein the first switch tube is arranged between the detection end and a grounding end, and the second switch tube is arranged between a voltage input end Power Up and a control end of the first switch tube;
the control end of the second switch tube is grounded through the first capacitor.
2. The power-on detection circuit as claimed in claim 1, wherein the first switch tube and the second switch tube are transistors or MOS tubes.
3. The power-on detection circuit as claimed in claim 1, wherein a second voltage-dividing resistor is disposed between the control terminal of the first switch tube and the second switch tube, and the second voltage-dividing resistor is connected in parallel with a second capacitor.
4. The power-on detection circuit as claimed in claim 3, wherein a third voltage dividing resistor is further disposed between the control terminal of the first switch tube and the second switch tube.
5. The power-on detection circuit as claimed in claim 1, wherein a fourth voltage-dividing resistor is disposed between the control terminal and the ground terminal of the first switch tube.
6. The power-on detection circuit as claimed in claim 1, wherein the second switch tube is a triode, a fifth voltage-dividing resistor is disposed between an emitter and a base of the second switch tube, and a sixth voltage-dividing resistor is disposed between the base of the second switch tube and the first capacitor.
7. The power-on detection circuit according to any one of claims 1 to 6, wherein the first switch tube is an NPN-type triode and the second switch tube is a PNP-type triode.
8. An electronic device comprising the power-on detection circuit according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023352038.5U CN214953814U (en) | 2020-12-31 | 2020-12-31 | Power-on detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023352038.5U CN214953814U (en) | 2020-12-31 | 2020-12-31 | Power-on detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214953814U true CN214953814U (en) | 2021-11-30 |
Family
ID=79121553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023352038.5U Active CN214953814U (en) | 2020-12-31 | 2020-12-31 | Power-on detection circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214953814U (en) |
-
2020
- 2020-12-31 CN CN202023352038.5U patent/CN214953814U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209028159U (en) | Battery access state detection circuit and connector | |
| CN214953814U (en) | Power-on detection circuit and electronic equipment | |
| CN110350902B (en) | Anti-misoperation circuit and anti-misoperation device | |
| CN212410835U (en) | Detection circuit of alternating current input line and socket with detection circuit | |
| CN212231073U (en) | Overcurrent protection circuit with alarming and time-delay self-recovery functions | |
| CN112018738B (en) | Sensor power supply interface circuit with overcurrent protection | |
| CN211630156U (en) | Switching circuit and electronic device | |
| CN208971122U (en) | Overvoltage crowbar and power bus slave circuit | |
| CN113746079A (en) | Hot plug circuit, control device and equipment | |
| CN111812553A (en) | Detection circuit of alternating current input line and socket with detection circuit | |
| CN218956772U (en) | Signal output circuit and intelligent power module | |
| CN219181495U (en) | Signal control circuit and signal control system | |
| CN218350841U (en) | Reset circuit and electronic device | |
| CN112992605B (en) | Isolation unit and related product | |
| CN216774288U (en) | Input power supply detection protection circuit and terminal equipment | |
| CN219611332U (en) | Overvoltage cut-off protection circuit | |
| JP4111167B2 (en) | Abnormal cell detector | |
| US8487674B1 (en) | Reset circuit | |
| CN219225026U (en) | Voltage detection circuit, battery management system, battery pack and power utilization device | |
| CN212622777U (en) | Voltage drop detection circuit and electronic device | |
| CN213876391U (en) | MOS drive protection feedback circuit | |
| CN219536043U (en) | Voltage comparison control circuit, circuit board and electronic equipment | |
| CN219018467U (en) | Short-circuit protection circuit and LED display screen | |
| CN111071046B (en) | High-low voltage detection circuit | |
| CN216526845U (en) | Resistance measuring circuit and electronic atomization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |