CN209659444U - A kind of ac dump sequential control circuit and electronic equipment - Google Patents
A kind of ac dump sequential control circuit and electronic equipment Download PDFInfo
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- CN209659444U CN209659444U CN201920738699.XU CN201920738699U CN209659444U CN 209659444 U CN209659444 U CN 209659444U CN 201920738699 U CN201920738699 U CN 201920738699U CN 209659444 U CN209659444 U CN 209659444U
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Abstract
The utility model discloses a kind of ac dump sequential control circuit and electronic equipment, wherein circuit includes: detection module and reseting module.Electronic equipment power source module is measured in real time by using detection module, when suddenly AC dump occurs for electronic equipment power source module, detection module detects that power module principal voltage end turns off, to avoid power-off sequential microcontroller from being unable to control, detection module is transmitted immediately in detection voltage to reseting module, driving microcontroller synchronizes multiple, it is realized while electronic equipment power source module AC dump with this, electronic equipment microcontroller is set to synchronize reset, it prevents from being likely to occur the supply voltage power down controlled by microcontroller in shutdown process and is ahead of microcontroller supply voltage and machine is caused to break down.
Description
Technical field
The utility model relates to technical field of electronic equipment, in particular to a kind of ac dump sequential control circuit and electronics
Equipment.
Background technique
In present electronic equipment, such as in flat panel TV, Core of TV set circuit is usually to be supplied by multiple groups voltage
Electricity, comprising: standby power+5V ,+12V etc..TV set power module usually standby power+5V when booting powers on first is powered on,
At this moment MCU (microcontroller) starts to work after resetting, and the electrifying timing sequence of other each group voltages is controlled by MCU
's.
The power module of electronic equipment is during shutdown (such as family powers off suddenly, and power supply is cut off television set when in use)
Power-off sequential MCU be unable to control, and will lead to due to the limitation of stand-by power consumption the load on standby+5V voltage under normal conditions
Very gently, power down also can be slow compared with other voltages when shutdown.This will lead to the power supply electricity for being likely to occur in shutdown process and being controlled by MCU
Pressure power down is ahead of MCU supply voltage and machine is caused to break down, such as: the entanglement of EEPROM data, shutdown video screen dodge flower
The problems such as screen, flower screen crashes when experiment test temporarily drops in power supply, thus the prior art could be improved and improve.
Utility model content
The main purpose of the utility model is to propose a kind of ac dump sequential control circuit, it is intended to solve ac dump mistake
It is likely to occur in journey and is ahead of microcontroller supply voltage by the supply voltage power down of microcontroller and machine is caused to break down.
To achieve the above object, the utility model proposes a kind of ac dump sequential control circuit, including power module,
Microcontroller, detection module and reseting module；
The first input end of the detection module and the second input terminal respectively with the standby voltage end of power module and main electricity
Pressure side is connected, and the third input terminal of the detection module is connected with the Opportunity awaiting control for linear voltage end of microcontroller, the reset
The first input end of module and the second input terminal are connected with the output end at the standby voltage end of power module and detection module respectively
It connects, the output end of the reseting module is connected with the Opportunity awaiting control for linear voltage end of microcontroller；
When the detection module detects the power module power down, the reseting module receives the detection of detection module
Voltage simultaneously drives microcontroller to synchronize reset.
Preferably, the detection module include for detect power supply whether power down detection unit and when for adjustment circuit
The timing control unit of sequence；
The first input end of the detection unit and the second input terminal respectively with the standby voltage end of power module and main electricity
Pressure side is connected, the first input end of the timing control unit and the second input terminal respectively with the output end of detection unit and micro-
The Opportunity awaiting control for linear voltage end of controller is connected, and the output end of the timing control unit is inputted with the third of detection unit respectively
End is connected with the second input terminal of reseting module.
Preferably, the detection unit includes the first electronic switch and the 4th resistance；
The of connection timing control unit while one end of first electronic switch connects power module principal voltage end
The other end of one input terminal, first electronic switch is connected by the standby voltage end that the 4th resistance connects power module.
Preferably, the timing control unit includes the second electronic switch and third electronic switch, second electronic cutting
One end of pass is connected with the Opportunity awaiting control for linear voltage end of one end of the first electronic switch and microcontroller respectively, second electronics
The other end of switch is connected with one end of the other end of the first electronic switch and third electronic switch respectively, the third electronics
The other end of switch is connected with the second input terminal connected end of reseting module.
Preferably, be connected between one end of second electronic switch and one end of the first electronic switch by the 5th resistance and
The series circuit of first capacitor composition.
Preferably, the detection module further includes the partial pressure unit for being divided to timing control unit, and described point
Pressing unit includes the second capacitor and the 6th resistance；One end of second capacitor and one end of the 6th resistance simultaneously with third electronics
One end of switch is connected, and the other end of second capacitor and the other end of the 6th resistance are grounded simultaneously.
Preferably, first electronic switch is the first triode；
The collector of first triode by the 4th resistance connect power module standby voltage end, the described 1st
The collector of pole pipe is also connected with one end of the other end of the second electronic switch and third electronic switch respectively, second electricity
The series circuit being made of the 5th resistance and first capacitor is connected between one end of sub switch and the ground level of the first triode, it is described
The emitting stage of first triode is grounded.
Preferably, second electronic switch and third electronic switch are respectively first diode and the second diode；
It is connected between the cathode of the first diode and the ground level of the first triode by the 5th resistance and first capacitor group
At series circuit, the cathode of the first diode is also connected with the Opportunity awaiting control for linear voltage end of microcontroller, described first
The anode of diode is connected with the anode of the collector of the first triode and the second diode respectively, second diode
Cathode is connected with the second input terminal connected end of reseting module.
Preferably, the detection unit further includes first resistor, second resistance and 3rd resistor；
One end of the first resistor is connected with the principal voltage end of power module and one end of the other end and second resistance
It is connected, the other end of second resistance ground connection, one end of the 3rd resistor is connected and separately with one end of first resistor
One end is connected with the collector of the first triode.
The utility model also proposes a kind of electronic equipment, and the electronic equipment has ac dump described in any of the above embodiments
Sequential control circuit.
Technical solutions of the utility model are measured in real time electronic equipment power source module by using detection module, in electricity
When AC dump (such as family's power-off) occurs suddenly for sub- equipment power module, detection module detects power module principal voltage end
Shutdown, to avoid power-off sequential moment microcontroller from being unable to control, detection module is transmitted immediately in detection voltage to reseting module,
Driving microcontroller synchronizes reset, is realized while electronic equipment power source module AC dump with this, makes microcontroller
Reset is synchronized, prevents from being likely to occur the supply voltage power down controlled in shutdown process being ahead of microcontroller by microcontroller
Supply voltage and cause machine to break down
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the system module figure of the utility model shutdown sequential control circuit；
Fig. 2 is the structural schematic diagram of the utility model power module and microcontroller；
Fig. 3 is the circuit reference figure of the utility model detection module and reseting module；
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| Power module | 10 | Microcontroller | 20 |
| Detection module | 30 | Reseting module | 40 |
| First resistor | R1 | Second resistance | R2 |
| 3rd resistor | R3 | 4th resistance | R4 |
| 5th resistance | R5 | 6th resistance | R6 |
| First triode | Q1 | First capacitor | C1 |
| Second capacitor | C2 | First diode | D1 |
| Second diode | D2 |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
The utility model proposes a kind of ac dump sequential control circuits.
In the utility model embodiment, as shown in Figure 1 to Figure 3, a kind of ac dump sequential control circuit, including power supply
Module 10, microcontroller 20, detection module 30 and reseting module 40；
The first input end and the second input terminal of the detection module 30 respectively with the standby voltage end of power module 10 and
Principal voltage end is connected, and the third input terminal of the detection module 30 is connected with the Opportunity awaiting control for linear voltage end of microcontroller 20,
The first input end and the second input terminal of the reseting module 40 respectively with the standby voltage end of power module 10 and detection module
30 output end is connected, and the output end of the reseting module 40 is connected with the Opportunity awaiting control for linear voltage end of microcontroller 20；
When the detection module 30 detects 10 power down of power module, the reseting module 40 receives detection module
30 detection voltage simultaneously drives microcontroller 20 to synchronize reset.
Technical solutions of the utility model electronic equipment is by taking television set as an example, convenient for description explanation, i.e., by using detection mould
Block 30 is measured in real time the power module 10 of television set, TV set power module 10 occur suddenly AC dump (such as
Family's power-off) when, detection module 30 detects that 10 principal voltage end of power module turns off, to avoid power-off sequential moment microcontroller
20 are unable to control, and detection module 30 is transmitted immediately in detection voltage to reseting module 40, and reseting module 40 drives microcontroller 20
Synchronizing reset, (general reset circuit, such as reset circuit shown in Fig. 3 can be used in reseting module 40, only as reset
The circuit reference figure of module 40, the utility model are not limited thereto), it is realized with this disconnected in the exchange of electronic equipment power source module 10
While electric, electronic equipment microcontroller 20 is made to synchronize reset, prevents from being likely to occur in shutdown process by microcontroller 20
The supply voltage power down of control is ahead of the supply voltage of microcontroller 20 and machine is caused to break down (such as EEPROM data
The problems such as entanglement, shutdown video screen, which dodge, spends screen, and flower screen crashes when the temporarily drop experiment of power module 10 is tested).
Fig. 2 shows electronic equipment provided by the embodiment of the utility model shutdown 10 power-off sequential control circuits of power module
Circuit diagram, illustrate for ease of description, part relevant to the utility model embodiment be only shown in figure.
Specifically, the detection module 30 include for detect power module whether power down detection unit and for adjusting
The timing control unit of circuit sequence；
The first input end of the detection unit and the second input terminal respectively with the standby voltage end of power module 10 and master
Voltage end is connected, the first input end of the timing control unit and the second input terminal respectively with the output end of detection unit and
The Opportunity awaiting control for linear voltage end of microcontroller 20 is connected, the output end of the timing control unit respectively with the third of detection unit
Input terminal is connected with the second input terminal of reseting module 40.
Specifically, the detection unit includes the first electronic switch and the 4th resistance R4；
Connection timing control unit while one end of first electronic switch connects 10 principal voltage end of power module
The other end of first input end, first electronic switch is connected by the standby voltage end of the 4th resistance R4 connection power module
It connects.
Specifically, the timing control unit includes the second electronic switch and third electronic switch, second electronic cutting
One end of pass is connected with the Opportunity awaiting control for linear voltage end of one end of the first electronic switch and microcontroller 20 respectively, second electricity
The other end of sub switch is connected with one end of the other end of the first electronic switch and third electronic switch respectively, the third electricity
The other end of sub switch is connected with the second input terminal connected end of reseting module 40.
Specifically, being connected between one end of second electronic switch and one end of the first electronic switch by the 5th resistance R5
With the series circuit of first capacitor C1 composition.
Specifically, the detection module 30 further includes the partial pressure unit for being divided to timing control unit, it is described
Partial pressure unit includes the second capacitor C2 and the 6th resistance R6；One end of the second capacitor C2 and one end of the 6th resistance R6 are simultaneously
It is connected with one end of third electronic switch, the other end of the second capacitor C2 and the other end of the 6th resistance R6 connect simultaneously
Ground.
Specifically, first electronic switch is the first triode Q1；
The collector of the first triode Q1 is by the standby voltage end of the 4th resistance R4 connection power module, and described the
The collector of one triode Q1 is also connected with one end of the other end of the second electronic switch and third electronic switch respectively, described
It is connected between one end of second electronic switch and the ground level of the first triode Q1 and to be made of the 5th resistance R5 and first capacitor C1
Series circuit, the emitting stage ground connection of the first triode Q1.
It is understood that first electronic switch can be other electronic switching devices such as metal-oxide-semiconductor etc., it is any to pass through change
Changing the design that transistor types reach equifinality with quantity should be included in the protection scope of the utility model.
Specifically, second electronic switch and third electronic switch are respectively first diode D1 and the second diode
D2；
It is connected between the cathode of the first diode D1 and the ground level of the first triode Q1 by the 5th resistance R5 and first
The series circuit of capacitor C1 composition, the cathode of the first diode D1 are also connected with the Opportunity awaiting control for linear voltage end of microcontroller 20
It connects, the anode of the first diode D1 is connected with the anode of the collector of the first triode Q1 and the second diode D2 respectively
It connects, the cathode of the second diode D2 is connected with the second input terminal connected end of reseting module 40.
Specifically, the detection unit further includes first resistor R1, second resistance R2 and 3rd resistor R3；
One end of the first resistor R1 is connected with the principal voltage end of power module 10 and the other end and second resistance R2
One end be connected, the other end of second resistance R2 ground connection, the one of one end of the 3rd resistor R3 and first resistor R1
End is connected and the other end is connected with the collector of the first triode Q1.
For ease of description, the electronic equipment of following embodiments is by taking television set as an example:
After television boot-strap, TV set power module 10 exports on standby voltage to microcontroller 20 (multiple with Fig. 3 first
For the circuit reference figure of position), while its standby voltage is supplied to reset circuit, reset microcontroller 20, to reset circuit
Homing action after, microcontroller 20, which works normally, simultaneously executes booting by user instruction, at this time microcontroller 20 export to
Machine controls voltage (by taking high level signal as an example), which opens other group of voltage for controlling power module 10, simultaneously
By the RC circuit of the 5th resistance R5 and first capacitor C1 composition, make the first triode Q1 (the 5th resistance R5 in the conductive state
In the RC circuit of first capacitor C1 composition, it can realize the timing of control detection circuit by adjusting R5 resistance value parameter, guarantee
The response speed of detection circuit when 10 principal voltage of power module makes a clean sweep of electricity), after principal voltage is rectified often, by first resistor R1 and
After second resistance R2 partial pressure, the first triode Q1 is set to maintain conducting using 3rd resistor R3.It will after first triode Q1 conducting
Make its collector keep low potential, at this time the second diode D2 anode be low potential, due in reseting module 40 with power module
10 standby voltages are connected, and the cathode voltage of the second diode D2 is greater than its anode voltage at this time, and the second diode D2 ends, because
This, when television set is opened, not by without influencing, machine works normally the reset circuit of reseting module 40.
When television set receives user instruction under open state executes standby, the output of microcontroller 20 at this time and booting
When the opposite Opportunity awaiting control for linear voltage signal (such as low level signal) of Opportunity awaiting control for linear voltage, the voltage signal is for controlling power supply
Module 10 is standby outer, while (the first triode Q1 is in main electricity at this time for making the cathode of first diode D1 be in low-pressure state
It is still in the conductive state in the presence of pressure side), the anode of first diode D1 and the standby voltage end of power module 10
It is connected, so that the anode voltage of first diode D1 is greater than its cathode voltage, first diode D1 is connected, at this time the one or three pole
The collector of pipe Q1 can be clamped at about 0.7V or so, and then the second diode D2 is made still to be in off state, therefore, in electricity
When depending on machine standby mode, the reset circuit of reseting module 40 is unaffected, and machine works normally.
When television set is when open state directly shuts down, the principal voltage end of power module 10 is fallen rapidly because of heavier loads
Electricity can fall point value, work as electricity by the resistance value of setting first resistor R1 and second resistance R2, setting 10 principal voltage end of power module
10 principal voltage end of source module rapidly power-down to setting value when, the ground level of the first triode Q1 is since voltage reduces rapidly, so that
One triode Q1 cut-off, since microcontroller 20 is still within open state at this time, Opportunity awaiting control for linear voltage end is remained as
High level signal, the first triode Q1 are still within off state, when the standby voltage end of power module 10 still passes through the 4th
Resistance R4 is conducted to the anode of the second diode D2, is provided high potential to the collector of the first triode Q1, is made the second diode
D2 is in the conductive state, and then reset circuit is driven to synchronize reset to microcontroller 20, makes microcontroller 20 and its periphery
Circuit synchronization stops working.
In addition, preferably, after preventing ac dump, television set is constantly multiple when the second diode D2 is connected
Position, causes television set to fail to open, and the anode of the second diode D2 passes through the other end of the second capacitor C2 and the 6th resistance R6
Parallelled circuit ground connection, divides the high voltage of the second diode D2 anode, prevents television set from can not work normally.
In conclusion by the utility model ac dump sequential control circuit, it is disconnected in the exchange of TV set power module 10
While electric, television set microcontroller 20 is made to synchronize reset, prevents from being likely to occur the power supply controlled by MCU in shutdown process
Voltage power down be ahead of MCU supply voltage and cause machine break down (such as the entanglement of EEPROM data, shutdown video screen dodge
The problems such as Hua Ping, flower screen crashes when the temporarily drop experiment of power module 10 is tested).
The utility model also proposes a kind of electronic equipment, which has the utility model ac dump timing control
Circuit, physical circuit is referring to above-described embodiment, since this electronic equipment uses whole technical solutions of above-mentioned all embodiments,
Therefore at least there are all beneficial effects brought by the technical solution of above-described embodiment, this is no longer going to repeat them.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of ac dump sequential control circuit, which is characterized in that including power module, microcontroller, detection module and answer
Position module；
The first input end of the detection module and the second input terminal respectively with the standby voltage end of power module and principal voltage end
It is connected, the third input terminal of the detection module is connected with the Opportunity awaiting control for linear voltage end of microcontroller, the reseting module
First input end and the second input terminal be connected respectively with the output end at the standby voltage end of power module and detection module, institute
The output end for stating reseting module is connected with the Opportunity awaiting control for linear voltage end of microcontroller；
When the detection module detects the power module power down, the reseting module receives the detection voltage of detection module
And microcontroller is driven to synchronize reset.
2. ac dump sequential control circuit as described in claim 1, which is characterized in that the detection module includes for examining
Survey power module whether power down detection unit and timing control unit for adjustment circuit timing；
The first input end of the detection unit and the second input terminal respectively with the standby voltage end of power module and principal voltage end
Be connected, the first input end of the timing control unit and the second input terminal respectively with the output end of detection unit and microcontroller
The Opportunity awaiting control for linear voltage end of device is connected, the output end of the timing control unit respectively with the third input terminal of detection unit and
Second input terminal of reseting module is connected.
3. ac dump sequential control circuit as claimed in claim 2, which is characterized in that the detection unit includes the first electricity
Sub switch and the 4th resistance；
The first of connection timing control unit is defeated while one end of first electronic switch connects power module principal voltage end
Enter end, the other end of first electronic switch is connected by the standby voltage end that the 4th resistance connects power module.
4. ac dump sequential control circuit as claimed in claim 3, which is characterized in that the timing control unit includes the
Two electronic switches and third electronic switch, one end of second electronic switch respectively with one end of the first electronic switch and micro-control
The Opportunity awaiting control for linear voltage end of device processed is connected, the other end of second electronic switch other end with the first electronic switch respectively
It is connected with one end of third electronic switch, the other end of the third electronic switch is connected with the second input terminal of reseting module
It connects.
5. ac dump sequential control circuit as claimed in claim 4, which is characterized in that one end of second electronic switch
The series circuit being made of the 5th resistance and first capacitor is connected between one end of the first electronic switch.
6. ac dump sequential control circuit as claimed in claim 5, which is characterized in that the detection module further includes being used for
To the partial pressure unit that timing control unit is divided, the partial pressure unit includes the second capacitor and the 6th resistance；Described second
One end of capacitor and one end of the 6th resistance are connected with one end of third electronic switch simultaneously, the other end of second capacitor
It is grounded simultaneously with the other end of the 6th resistance.
7. ac dump sequential control circuit as claimed in claim 6, which is characterized in that first electronic switch is first
Triode；
The collector of first triode connects the standby voltage end of power module, first triode by the 4th resistance
Collector be also connected respectively with one end of the other end of the second electronic switch and third electronic switch, second electronic cutting
It is connected to the series circuit being made of the 5th resistance and first capacitor between one end of pass and the ground level of the first triode, described first
The emitting stage of triode is grounded.
8. ac dump sequential control circuit as claimed in claim 7, which is characterized in that second electronic switch and third
Electronic switch is respectively first diode and the second diode；
It is connected between the cathode of the first diode and the ground level of the first triode and is made of the 5th resistance and first capacitor
Series circuit, the cathode of the first diode are also connected with the Opportunity awaiting control for linear voltage end of microcontroller, the one or two pole
The anode of pipe is connected with the anode of the collector of the first triode and the second diode respectively, the cathode of second diode
It is connected with the second input terminal connected end of reseting module.
9. ac dump sequential control circuit as claimed in claim 8, which is characterized in that the detection unit further includes first
Resistance, second resistance and 3rd resistor；
One end of the first resistor is connected with the principal voltage end of power module and the other end is connected with one end of second resistance
It connects, the other end ground connection of the second resistance, one end of the 3rd resistor is connected with one end of first resistor and the other end
It is connected with the collector of the first triode.
10. a kind of electronic equipment, which is characterized in that the electronic equipment has to be handed over as claimed in any one of claims 1-9 wherein
Stream shutdown sequential control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738699.XU CN209659444U (en) | 2019-05-21 | 2019-05-21 | A kind of ac dump sequential control circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738699.XU CN209659444U (en) | 2019-05-21 | 2019-05-21 | A kind of ac dump sequential control circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209659444U true CN209659444U (en) | 2019-11-19 |
Family
ID=68530474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920738699.XU Active CN209659444U (en) | 2019-05-21 | 2019-05-21 | A kind of ac dump sequential control circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209659444U (en) |
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2019
- 2019-05-21 CN CN201920738699.XU patent/CN209659444U/en active Active
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