CN201570898U - Power failure data protection circuit - Google Patents
Power failure data protection circuit Download PDFInfo
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- CN201570898U CN201570898U CN2009203131841U CN200920313184U CN201570898U CN 201570898 U CN201570898 U CN 201570898U CN 2009203131841 U CN2009203131841 U CN 2009203131841U CN 200920313184 U CN200920313184 U CN 200920313184U CN 201570898 U CN201570898 U CN 201570898U
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Abstract
The utility model provides a power failure data protection circuit comprising a power supply, a control unit and a storage unit. The power failure data protection circuit further comprises a power failure detection circuit, a voltage stabilizing circuit, a first isolation unit and an energy storage unit; the input end of the power failure detection circuit is connected with the power supply, and the output end thereof is connected with the control unit; the input end of the voltage stabilizing circuit is connected with the power supply, and the output end thereof is connected with the first isolation unit; and the output end of the first isolation unit is connected with the input end of the energy storage unit, and the output end of the energy storage unit is connected with the control unit and the energy storage unit. The power failure data protection circuit can make rapid identification when the power supply is in abrupt failure, sends power failure signals timely to the control unit, and can continuously supply power for the control unit and the energy storage unit through the energy storage unit; and the control unit stores data needing storage in the storage unit without the phenomenon of data loss.
Description
Technical field
The utility model relates to a kind of data protection circuit, the data protection circuit after specifically a kind of sudden power.
Background technology
People may run into the situation of power supply sudden power in the middle of work, in the control system running of high reliability, this power cut-off may bring tremendous loss, causes serious consequence, for example, the data disappearance that easy generation is being handled after outage.At this situation, should be to the measure of Control System Design corresponding protection.In the prior art, the method that adopts usually is to establish a stand-by power supply in addition to drop into power supply when outage.
Application number is 200520140128.4 Chinese patent application, but disclose a kind of uninterruptible power supply (UPS) device and method of storing data automatically, comprised charging circuit, rechargeable battery and power supply detection, power management, mainboard power supply, hard disk power supply and power supply switch circuit.Device is connected with computer motherboard, hard disk and power supply unit, detect power supply unit by power sense circuit, when outage takes place, transmit power-off signal to electric power management circuit, the control power supply switch circuit, allow the power supply of motherboard and hard disk be switched to, and the program that will carry out and data write in the hard disk of computer and store by battery supplied.From hard disk, read this program and data, promptly return back to the preceding state of outage.
Technique scheme does not effectively reduce failure rate, and needs to increase charging circuit and rechargeable battery, does not effectively reduce cost.
Application number is the Chinese patent application of CN02226031.5, a kind of small household appliances controller power-down retaining circuit is disclosed, the diode that comprises the power input that is serially connected in described controller MCU, the negative pole of described diode is connected with the power input of MCU, the negative pole end of described diode also is connected with capacitor, and the negative pole of capacitor is connected with the earth terminal of control MCU; After the supply voltage of small household appliances is lower than a certain voltage, the clock oscillation source just can the failure of oscillations, MCU promptly can quit work, yet register that it is inner and data storage only need lower voltage just can preserve wherein data, add appropriate software and handle the function of the power-failure memory that can realize small household appliances, the utility model can make small household appliances after sending a telegram here again, can the operating state when outage work on, make small household appliances be operated in optimum Working, holding circuit is simple in structure, and cost is low.This technical scheme can not in time detect when power cut-off, and controller can not be recognized the situation of power cut-off in real time, and needs corresponding software cooperation just can finish data protection function.
The utility model content
The purpose of this utility model is when the power supply sudden power, and the storage that needs are preserved in memory cell the phenomenon of loss of data can not take place.
The technical problems to be solved in the utility model is to overcome the above-mentioned deficiency of prior art, and a kind of simple in structure, failure data protection circuit that reliability is high is provided.
The realization the technical solution of the utility model is as follows:
A kind of failure data protection circuit comprises power supply, control unit and memory cell, and control unit links to each other with memory cell, it is characterized in that: described failure data protection circuit also comprises power failure detection circuit, first isolated location and energy-storage units;
The input of described power failure detection circuit links to each other with described power supply, and the output of power failure detection circuit links to each other with described control unit;
The input of described first isolated location links to each other with described power supply, and the output of first isolated location links to each other with the input of described energy-storage units;
Described energy-storage units and described control unit and memory cell are connected in parallel on the output of first isolated location, and when outage took place, described energy-storage units was described control unit and memory cell power supply.
Described power failure detection circuit comprises first shunt resistance, second shunt resistance, the 3rd shunt resistance, voltage stabilizing didoe, the first protection electric capacity and the second protection electric capacity;
Described power supply links to each other with described first shunt resistance, ground connection behind connect successively after described first shunt resistance second shunt resistance and the 3rd shunt resistance;
Output as described power failure detection circuit between second shunt resistance and the 3rd shunt resistance links to each other with described control unit;
Described voltage stabilizing didoe and the described first protection electric capacity are connected in parallel between the output of described first shunt resistance and the ground;
Be connected the described second protection electric capacity between the output of described power failure detection circuit and the ground.
The utility model also comprises voltage stabilizing circuit, and described voltage stabilizing circuit input links to each other with described power supply, and output links to each other with the input of described first isolated location.
The utility model also comprises second isolated location, and described voltage stabilizing circuit input links to each other with described power supply by described second isolated location.
Described energy-storage units comprises storage capacitor, and described storage capacitor one end links to each other other end ground connection with the output of described first isolated location.
Described first isolated location comprises first isolating diode, and the positive pole of described first isolating diode links to each other with the output of described voltage stabilizing circuit, and negative pole links to each other with described energy-storage units.
Described second isolated location comprises second isolating diode, and the positive pole of described second isolating diode links to each other with described power supply, and negative pole links to each other with the input of described voltage stabilizing circuit.
Described voltage stabilizing circuit comprises voltage adjuster, first filter capacitor and second filter capacitor;
The input of described voltage adjuster links to each other with the output of described second isolated location, and output links to each other with the input of described first isolated location;
Be connected first filter capacitor between the input of described voltage adjuster and the ground, be connected second filter capacitor between output and the ground.
After adopting technique scheme, the utility model compared with prior art has following beneficial effect:
1, the input owing to power failure detection circuit of the present utility model links to each other with described power supply, the output of power failure detection circuit links to each other with described control unit, can be behind power cut-off, power-off signal is sent to control unit, control unit is carried out data recording program, and the storage that needs are preserved is in memory cell.
2, because energy-storage units of the present utility model and control unit and memory cell are connected in parallel on the output of first isolated location, when taking place to cut off the power supply, described energy-storage units provides power supply for control unit and memory cell in a period of time after outage.
3, power failure detection circuit directly links to each other with DC power supply, and is simple in structure, the security reliability height.
The utility model is when the power supply sudden power, can quick identification, the signal of outage is in time sent to control unit, and continue to provide power supply for control unit and memory cell by energy-storage units, the phenomenon of loss of data can not take place in the storage that control unit will need to preserve in memory cell.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the schematic diagram of power failure detection circuit;
Fig. 3 is the schematic diagram of voltage stabilizing circuit.
Embodiment
Failure data protection circuit of the present utility model can be behind power cut-off for control unit and memory cell provide power supply, saved system significant data in time.Fig. 1 is a structural representation of the present utility model, comprises power supply 1, power failure detection circuit 2, second isolated location 3, voltage stabilizing circuit 4, first isolated location 5, energy-storage units 6, control unit 7 and memory cell 8.
The output of voltage stabilizing circuit 4 links to each other with first isolated location 5, and the output voltage of voltage stabilizing circuit 4 can be+5v voltage, and first isolated location 5 can be a diode, and the output of the anodal voltage stabilizing circuit 4 of diode links to each other, and negative pole links to each other with energy-storage units 6.
Energy-storage units 6 can be an electric capacity, can be electrolytic capacitor particularly, and electric capacity one end links to each other other end ground connection with the diode cathode of first isolated location 5.When outage took place power supply 1, energy-storage units 6 was control unit 7 and memory cell 8 power supplies, and power-on time can reach more than the 100ms.The withstand voltage nominal numerical value of described capacitor is greater than output voltage.
The utility model can be applied in the control system of single-chip microcomputer, and memory cell can be the E of single-chip microcomputer inside
2ROM, the utility model can interrupt single-chip microcomputer and carry out the data protection operation when the power supply supply power voltage drop to set point automatically, and system will enter stopped status after the storage.
Fig. 2 is the schematic diagram of power failure detection circuit, and power failure detection circuit comprises the first shunt resistance R1, the second shunt resistance R2, the 3rd shunt resistance R3, voltage stabilizing didoe D1, the first protection capacitor C 1 and the second protection capacitor C 2;
Described power supply 1 links to each other with the described first shunt resistance R1, ground connection behind connect successively after the described first shunt resistance the R1 second shunt resistance R2 and the 3rd shunt resistance R3;
Output as described power failure detection circuit 2 between the second shunt resistance R2 and the 3rd shunt resistance R3 links to each other with described control unit 7;
The voltage stabilizing didoe D1 and the first protection capacitor C 1 are connected in parallel between the output of the first shunt resistance R1 and the ground;
Be connected the second protection capacitor C 2 between the output of power failure detection circuit 2 and the ground.
Power failure detection circuit 2 can offer 7 one high level signals of control unit when power supply 1 operate as normal, when power cut-off, give 7 one low level signals of control unit, then, control unit 7 is carried out data recording programs, and the storage that needs are preserved is in memory cell.
Voltage stabilizing circuit comprises voltage adjuster 9, the first filter capacitor C3 and the second filter capacitor C4, the first filter capacitor C3 and the second filter capacitor C4 can be electrochemical capacitors, voltage adjuster 9 can be L7805, the input of voltage adjuster 9 links to each other with the output of second isolated location 3, output links to each other with the input of first isolated location 5, be connected the first filter capacitor C3 between the input of voltage adjuster 9 and the ground, can also connect ceramic disc capacitor C5, be connected the second filter capacitor C4 between output and the ground, can also connect ceramic disc capacitor C6.When voltage adjuster 9 detects input voltage and is lower than 6V, quit work.Not to energy-storage units 6 chargings.
Claims (8)
1. a failure data protection circuit comprises power supply, control unit and memory cell, and control unit links to each other with memory cell, it is characterized in that: described failure data protection circuit also comprises power failure detection circuit, first isolated location and energy-storage units;
The input of described power failure detection circuit links to each other with described power supply, and the output of power failure detection circuit links to each other with described control unit;
The input of described first isolated location links to each other with described power supply, and the output of first isolated location links to each other with the input of described energy-storage units;
Described energy-storage units and described control unit and memory cell are connected in parallel on the output of first isolated location, and when outage took place, described energy-storage units was described control unit and memory cell power supply.
2. failure data protection circuit according to claim 1 is characterized in that: described power failure detection circuit comprises first shunt resistance, second shunt resistance, the 3rd shunt resistance, voltage stabilizing didoe, the first protection electric capacity and the second protection electric capacity;
Described power supply links to each other with described first shunt resistance, ground connection behind connect successively after described first shunt resistance second shunt resistance and the 3rd shunt resistance;
Output as described power failure detection circuit between second shunt resistance and the 3rd shunt resistance links to each other with described control unit;
Described voltage stabilizing didoe and the described first protection electric capacity are connected in parallel between the output of described first shunt resistance and the ground;
Be connected the described second protection electric capacity between the output of described power failure detection circuit and the ground.
3. failure data protection circuit according to claim 1 is characterized in that: also comprise voltage stabilizing circuit, described voltage stabilizing circuit input links to each other with described power supply, and output links to each other with the input of described first isolated location.
4. failure data protection circuit according to claim 3 is characterized in that: also comprise second isolated location, described voltage stabilizing circuit input links to each other with described power supply by described second isolated location.
5. according to the described failure data protection circuit of claim 1-4, it is characterized in that: described energy-storage units comprises storage capacitor, and described storage capacitor one end links to each other other end ground connection with the output of described first isolated location.
6. according to the described failure data protection circuit of claim 1-4; it is characterized in that: described first isolated location comprises first isolating diode; the positive pole of described first isolating diode links to each other with the output of described voltage stabilizing circuit, and negative pole links to each other with described energy-storage units.
7. failure data protection circuit according to claim 4 is characterized in that: described second isolated location comprises second isolating diode, and the positive pole of described second isolating diode links to each other with described power supply, and negative pole links to each other with the input of described voltage stabilizing circuit.
8. failure data protection circuit according to claim 7 is characterized in that: described voltage stabilizing circuit comprises voltage adjuster, first filter capacitor and second filter capacitor;
The input of described voltage adjuster links to each other with the output of described second isolated location, and output links to each other with the input of described first isolated location;
Be connected first filter capacitor between the input of described voltage adjuster and the ground, be connected second filter capacitor between output and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203131841U CN201570898U (en) | 2009-09-29 | 2009-10-23 | Power failure data protection circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920311891.7 | 2009-09-29 | ||
| CN2009203131841U CN201570898U (en) | 2009-09-29 | 2009-10-23 | Power failure data protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201570898U true CN201570898U (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203131841U Expired - Fee Related CN201570898U (en) | 2009-09-29 | 2009-10-23 | Power failure data protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201570898U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541238A (en) * | 2011-12-31 | 2012-07-04 | 数源科技股份有限公司 | Outage protector used for embedded computer and realization method thereof |
| CN103187792A (en) * | 2011-12-28 | 2013-07-03 | 深圳市金威源科技股份有限公司 | High energy efficiency uninterruptible high-frequency switching power supply in ATM |
| CN111049256A (en) * | 2019-12-26 | 2020-04-21 | 枣阳市米朗科技有限公司 | Circuit for storing data in case of power failure and data storage method |
-
2009
- 2009-10-23 CN CN2009203131841U patent/CN201570898U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187792A (en) * | 2011-12-28 | 2013-07-03 | 深圳市金威源科技股份有限公司 | High energy efficiency uninterruptible high-frequency switching power supply in ATM |
| CN104779694A (en) * | 2011-12-28 | 2015-07-15 | 深圳市金威源科技股份有限公司 | High-energy-efficiency uninterrupted high frequency switching power supply in ATM |
| CN104779695A (en) * | 2011-12-28 | 2015-07-15 | 深圳市金威源科技股份有限公司 | High-energy-efficiency uninterrupted high frequency switching power supply in ATM |
| CN103187792B (en) * | 2011-12-28 | 2015-09-02 | 深圳市金威源科技股份有限公司 | The uninterrupted high frequency switch power of high energy efficiency in ATM |
| CN104779695B (en) * | 2011-12-28 | 2017-07-14 | 深圳市金威源科技股份有限公司 | The uninterrupted high frequency switch power of high energy efficiency in ATM |
| CN102541238A (en) * | 2011-12-31 | 2012-07-04 | 数源科技股份有限公司 | Outage protector used for embedded computer and realization method thereof |
| CN111049256A (en) * | 2019-12-26 | 2020-04-21 | 枣阳市米朗科技有限公司 | Circuit for storing data in case of power failure and data storage method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20141023 |
|
| EXPY | Termination of patent right or utility model |