CN208092121U - A kind of voltage monitoring circuit based on reset chip - Google Patents
A kind of voltage monitoring circuit based on reset chip Download PDFInfo
- Publication number
- CN208092121U CN208092121U CN201820531210.7U CN201820531210U CN208092121U CN 208092121 U CN208092121 U CN 208092121U CN 201820531210 U CN201820531210 U CN 201820531210U CN 208092121 U CN208092121 U CN 208092121U
- Authority
- CN
- China
- Prior art keywords
- voltage
- pin
- monitoring circuit
- reset chip
- reset
- 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
Abstract
The utility model discloses the voltage monitoring circuit based on reset chip, power consumption is ultralow, small, applied widely, can save printed circuit board space and reduce current drain.The voltage monitoring circuit includes：First divider resistance, the second divider resistance and reset chip；Wherein, one end of the first divider resistance connects input voltage, the supply voltage pin connection of the other end and reset chip；One end of second divider resistance is connected between the first divider resistance and reset chip, other end ground connection；The grounding pin of reset chip is grounded, voltage of the reset pin between supply voltage pin and grounding pin exports first voltage when being less than resetting voltage threshold value, voltage of the reset pin between supply voltage pin and grounding pin exports second voltage when being higher than resetting voltage threshold value, and first voltage is less than second voltage.
Description
Technical field
The utility model is related to avionic device technical field more particularly to a kind of voltage monitorings based on reset chip
Circuit.
Background technology
In the test of various electronic equipments and application process, it often may require that and various chips, device, circuit generated
Electric signal carry out voltage monitoring, to prevent from exceeding preset voltage range, or reaching preset range of voltage values be
It exports and the corresponding signal such as resets, restarts, enabling.
Fig. 1 shows a kind of traditional voltage monitoring circuit.Corresponding input voltage vin, by divider resistance R1 and R2 points
The in-phase input end of input comparator U1 after pressure；Voltage VCC1 is voltage-reference D1 power supplies by resistance R3, is formed by base
The inverting input of quasi- control source comparator U1, comparator U1 are powered by VCC2；It is obtained by comparing the output end of device U1
Output voltage Vout compares if the reference voltage that the voltage after divider resistance R1 and R2 partial pressure is generated higher than voltage-reference D1
High level is exported compared with device U1, it is on the contrary then export low level.As can be seen that conventional voltage monitoring circuit at least needs 5 devices
It could work, since U1 and D1 is generally large relative to integrated circuit dimensions, the entire circuit that monitors generally requires to occupy largely
Printed circuit board space.Moreover, voltage-reference D1 and comparator U1 are required to independent reference voltage source to power, U1 and D1
Minimum working current be at least hundreds of μ A, cause entirely monitor circuit current drain proportion it is larger.In various aviations
Electronic equipment all has harsh standard, traditional voltage monitoring circuit body due to application environment, circuit volume and power consumption etc.
The problem that product is big and power consumption is excessively high seems especially prominent.
Utility model content
One of the purpose of this utility model at least that, for how to overcome the above-mentioned problems of the prior art, provide
A kind of voltage monitoring circuit based on reset chip, power consumption is ultralow, small, applied widely, can save printed circuit
Plate space simultaneously reduces current drain.
To achieve the goals above, the technical solution adopted in the utility model includes following aspects.
A kind of voltage monitoring circuit based on reset chip comprising：First divider resistance, the second divider resistance and
Reset chip；
Wherein, one end of the first divider resistance connects input voltage, the supply voltage pin company of the other end and reset chip
It connects；One end of second divider resistance is connected between the first divider resistance and reset chip, other end ground connection；Reset chip connects
Ground pin ground connection, voltage of the reset pin between supply voltage pin and grounding pin export the when being less than resetting voltage threshold value
One voltage, the second electricity of output when voltage of the reset pin between supply voltage pin and grounding pin is higher than resetting voltage threshold value
Pressure, and first voltage is less than second voltage.
Preferably, the reset chip uses MAX809 reset chips.
Preferably, the resetting voltage threshold value is 2.93V.
Preferably, it is 3.9K Ω that the resistance value of the first divider resistance R1, which is the resistance value of 8.2K Ω, the second divider resistance R2,.
Preferably, the voltage range between the supply voltage pin and grounding pin is -0.3V to 6.0V.
Preferably, the reset chip is less than 1 μ A by the supply current representative value that supply voltage pin obtains.
Preferably, the reset pin of the reset chip be connected to micro-control unit MCU universal input/output pin or
Person's interrupting input pin makes MCU monitor powering on and powering off for external voltage with the voltage by output.
Preferably, the micro-control unit MCU includes programmable logic device, central processing unit, complex programmable logic
One of device, field programmable gate array and microcontroller or more persons.
Preferably, the voltage monitoring circuit includes multigroup first divider resistance, the second divider resistance and reset coil
Piece.
In conclusion by adopting the above-described technical solution, the utility model at least has the advantages that：
It is made up of general in conjunction with external divider resistance the reference voltage for making full use of reset chip to be internally integrated
Voltage monitoring circuit has the characteristics that circuit structure is simple, power consumption is ultralow, small, applied widely.Especially suitable for tool
There is plurality of voltages to need the application scenario monitored, a large amount of printed circuit board space can be saved and reduce current drain.
Description of the drawings
Fig. 1 is a kind of traditional voltage monitoring circuit.
Fig. 2 is the structural schematic diagram according to the voltage monitoring circuit of the utility model embodiment.
Specific implementation mode
With reference to the accompanying drawings and embodiments, the present invention will be further described in detail, so that the utility model
Object, technical solution and advantage are more clearly understood.It should be appreciated that specific embodiment described herein is only explaining this reality
With novel, it is not used to limit the utility model.
Fig. 2 shows the voltage monitoring circuits based on reset chip according to the utility model embodiment.The embodiment
Voltage monitoring circuit includes：First divider resistance R1, the second divider resistance R2 and reset chip M1.
Wherein, one end of the first divider resistance R1 connects input voltage vin, the supply voltage of the other end and reset chip M1
Pin VCC connections；One end of second divider resistance R2 is connected between the first divider resistance R1 and reset chip M1, another termination
Ground；The grounding pin GND ground connection of reset chip M1, reset pin RST is between supply voltage pin VCC and grounding pin GND
Voltage export first voltage when being less than resetting voltage threshold value (such as 2.93V), it is on the contrary then export second voltage, and first voltage
Less than second voltage.
In a preferred embodiment, MAX809 reset chips may be used in above-mentioned reset chip.Such as when input voltage is
When 12V, the resistance value of the first divider resistance R1 is that the resistance value of 8.2K Ω, the second divider resistance R2 are 3.9K Ω.Entire voltage monitoring
Circuit only needs 3 devices composition, and because reset chip has been internally integrated reference voltage, need not external benchmark electricity again
Pressure.Moreover, the voltage range between supply voltage pin VCC and grounding pin GND is -0.3V to 6.0V, reset chip passes through
The supply current representative value that supply voltage pin VCC is obtained directly can draw electric current, no only less than 1uA from input voltage
It needs individually to power, circuit is most simplified.
In a particular application, the reset pin RST of reset chip M1 can be connected to the General of micro-control unit MCU
Purpose Input Output (universal input/output) GPIO pins or interrupting input pin, to pass through the voltage of output
MCU is set to monitor powering on and powering off for external voltage.
Wherein, micro-control unit MCU can be PLD (Programmable Logic Device, programmable logic device
Part), CPU (Central Processing Unit, central processing unit), CPLD (Complex Programmable Logic
Device, Complex Programmable Logic Devices), FPGA (Field-Programmable Gate Array, field-programmable gate array
Row), microcontroller etc..
The above, the only detailed description of specific embodiment of the present invention rather than limitations of the present invention.
Those skilled in the technology concerned in the case where not departing from the principle and range of the utility model, the various replacements made,
Modification and improvement should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of voltage monitoring circuit based on reset chip, which is characterized in that the voltage monitoring circuit includes：First partial pressure
Resistance, the second divider resistance and reset chip；
Wherein, one end of the first divider resistance connects input voltage, the supply voltage pin connection of the other end and reset chip；The
One end of two divider resistances is connected between the first divider resistance and reset chip, other end ground connection；The grounding lead of reset chip
Foot is grounded, the first electricity of output when voltage of the reset pin between supply voltage pin and grounding pin is less than resetting voltage threshold value
Pressure, voltage of the reset pin between supply voltage pin and grounding pin export second voltage when being higher than resetting voltage threshold value,
And first voltage is less than second voltage.
2. voltage monitoring circuit according to claim 1, which is characterized in that the reset chip uses MAX809 reset coils
Piece.
3. voltage monitoring circuit according to claim 1, which is characterized in that the resetting voltage threshold value is 2.93V.
4. voltage monitoring circuit according to claim 1, which is characterized in that the resistance value of the first divider resistance R1 is
The resistance value of 8.2K Ω, the second divider resistance R2 are 3.9K Ω.
5. voltage monitoring circuit according to claim 1, which is characterized in that the supply voltage pin and grounding pin it
Between voltage range be -0.3V to 6.0V.
6. voltage monitoring circuit according to claim 1, which is characterized in that the reset chip passes through supply voltage pin
The supply current representative value of acquisition is less than 1 μ A.
7. voltage monitoring circuit according to any one of claim 1 to 6, which is characterized in that the reset chip is answered
Position pin is connected to the universal input/output pin or interrupting input pin of micro-control unit MCU, to pass through the voltage of output
Make powering on and powering off for MCU monitoring external voltages.
8. voltage monitoring circuit according to claim 7, which is characterized in that the micro-control unit
MCU include programmable logic device, central processing unit, Complex Programmable Logic Devices, field programmable gate array and
One of microcontroller or more persons.
9. voltage monitoring circuit according to any one of claim 1 to 6, which is characterized in that the voltage monitoring circuit
Including multigroup first divider resistance, the second divider resistance and reset chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820531210.7U CN208092121U (en) | 2018-04-13 | 2018-04-13 | A kind of voltage monitoring circuit based on reset chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820531210.7U CN208092121U (en) | 2018-04-13 | 2018-04-13 | A kind of voltage monitoring circuit based on reset chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208092121U true CN208092121U (en) | 2018-11-13 |
Family
ID=64055953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820531210.7U Active CN208092121U (en) | 2018-04-13 | 2018-04-13 | A kind of voltage monitoring circuit based on reset chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208092121U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900957A (en) * | 2019-04-16 | 2019-06-18 | 上海艾为电子技术股份有限公司 | A kind of multiport chip with voltage detecting circuit |
| CN112994461A (en) * | 2021-03-26 | 2021-06-18 | 浙江高泰昊能科技有限公司 | DC-DC isolation power supply circuit and working method thereof |
| CN113820988A (en) * | 2021-10-15 | 2021-12-21 | 湖南子宏生态科技股份有限公司 | Sewage treatment automatic control system |
-
2018
- 2018-04-13 CN CN201820531210.7U patent/CN208092121U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900957A (en) * | 2019-04-16 | 2019-06-18 | 上海艾为电子技术股份有限公司 | A kind of multiport chip with voltage detecting circuit |
| CN109900957B (en) * | 2019-04-16 | 2021-08-17 | 上海艾为电子技术股份有限公司 | Multi-port chip with voltage detection circuit |
| CN112994461A (en) * | 2021-03-26 | 2021-06-18 | 浙江高泰昊能科技有限公司 | DC-DC isolation power supply circuit and working method thereof |
| CN113820988A (en) * | 2021-10-15 | 2021-12-21 | 湖南子宏生态科技股份有限公司 | Sewage treatment automatic control system |
| CN113820988B (en) * | 2021-10-15 | 2023-10-13 | 湖南子宏生态科技股份有限公司 | Sewage treatment automatic control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208092121U (en) | A kind of voltage monitoring circuit based on reset chip | |
| US9182799B2 (en) | USB OTG device with power mode switch function | |
| CN105437981B (en) | A kind of automobile electrion control system | |
| US9018798B2 (en) | Power supply circuit | |
| CN101320057B (en) | Electric voltage allowance test device | |
| CN104122970A (en) | Power circuit | |
| US20120161809A1 (en) | Power supply testing device and computer system having same | |
| US8520350B2 (en) | Protection circuit for digital integrated chip | |
| TWI479320B (en) | Touch module switch circuit for all in one computer | |
| US8253602B2 (en) | Keyboard with circuit for clearing CMOS data | |
| CN106033241A (en) | Interface power supply circuit | |
| US20130328580A1 (en) | Test circuit for power supply unit | |
| CN106569572B (en) | Mainboard and computerized control system with the mainboard | |
| CN105867523B (en) | The mainboard of discharge circuit and the application discharge circuit | |
| US8325052B2 (en) | Over-current protection apparatus | |
| CN204946892U (en) | There is the integrated circuit of electrostatic discharge protective | |
| CN202649858U (en) | Overvoltage tolerance level detection circuit and system | |
| CN203690882U (en) | Computer USB interface short circuit prevention circuit | |
| CN102385018B (en) | External equipment connection sensing circuit | |
| US9490622B2 (en) | Over-current protection device for expansion cards | |
| CN211454320U (en) | Aviation power supply inspection tester control circuit | |
| US9509291B1 (en) | CMOS data reset circuit with indicating unit | |
| CN210724723U (en) | Multi-chip power-on reset circuit | |
| CN104076891A (en) | Multifunctional pin circuit device | |
| CN104124663A (en) | Voltage protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |