CN106886273A - A kind of power-down protection circuit - Google Patents
A kind of power-down protection circuit Download PDFInfo
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- CN106886273A CN106886273A CN201710103040.2A CN201710103040A CN106886273A CN 106886273 A CN106886273 A CN 106886273A CN 201710103040 A CN201710103040 A CN 201710103040A CN 106886273 A CN106886273 A CN 106886273A
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- power
- module
- voltage
- energy
- protection circuit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
- G06F1/305—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations in the event of power-supply fluctuations
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of power-down protection circuit, belongs to electronic applications, and the present invention, for circuit system provides power-off signal, allows circuit system to timely respond to the event by power detecting module, division module and voltage reduction module；Step-down, energy storage and boost module provide the electric energy of certain hour for circuit system, prevent unexpected power down and lose data and operation etc..The design is applied to the field for having particular/special requirement to unexpected power down, such as the field such as storage device, network service has broad application prospects.
Description
Technical field
The present invention relates to electronic applications, more particularly to a kind of power-down protection circuit.
Background technology
RAM in computer system must connect with the mains all the time, and the data that otherwise it is stored will lose, therefore power supply falls
Electricity will be catastrophic.In order to protect RAM store data whenever will not all lose, generally using power-down protection circuit come
Solve this problem.Likewise, inside the hard disk design of NAND Flash compositions, if unexpected power down, map information will
Lose, it is impossible to read data.
The content of the invention
In order to solve the above technical problems, the present invention proposes a kind of power-down protection circuit.After adding power-down protection circuit,
Necessary information can be stored using power-down protection circuit.
The technical scheme is that：
A kind of power-down protection circuit, mainly by power detecting module, division module, voltage reduction module, energy-storage module and liter pressing mold
Block is constituted；Wherein,
Power detecting module, division module, the control unit real-time monitoring power supply of voltage reduction module composition, once power-off sends control
Signal, in case circuit system opens power down protection pattern.
The energy unit of voltage reduction module, energy-storage module and boost module composition, uses the less super electricity of operating voltage
Hold so that the unit take up space it is smaller.
By power detecting module, division module and voltage reduction module for circuit system provides power-off signal, make system electricity
Road can timely respond to the event；Step-down, energy storage and boost module provide the electric energy of a period of time for circuit system, prevent accident
Power down and lose data and operation.
Connected with diode by between power down protection voltage and system input voltage after energy-storage module boosting, it is not necessary to
When control needs connection system input voltage, when needs to be input into power down protection voltage, and power down protection voltage is input into compared with system
The small about 0.4V of voltage（Diode drop）.
Further, control unit is made up of comparator LM393, power regulator TPS53319 and divider resistance.
Further, energy unit selects power regulator MAX1776, is low pressure by input voltage regulation, including
Diode drop, adjusts output voltage.
Further, by using power regulator TPS55340 so that power down protection voltage is small compared with system input voltage
About 0.4V.
The beneficial effects of the invention are as follows
By power detecting module, division module and voltage reduction module for circuit system provides power-off signal, make the circuit system can
To timely respond to the event；Step-down, energy storage and boost module provide the electric energy of certain hour for circuit system, prevent unexpected power down
And lose data and operation etc..The design is applied to the field for having particular/special requirement to unexpected power down, such as storage device, network are led to
The fields such as letter, have broad application prospects.
Brief description of the drawings
Fig. 1 is design frame chart of the invention；
Fig. 2 is control unit circuit diagram；
Fig. 3 .1 are the top half schematic diagrames of energy unit circuit diagram；
Fig. 3 .2 are the latter half schematic diagrames of energy unit circuit diagram.
Specific embodiment
More detailed elaboration is carried out to present disclosure below：
The method for designing of a kind of power-down protection circuit of the invention, by power detecting module, division module, voltage reduction module, energy storage
Module and boost module are constituted, as shown in Figure 1.
Power detecting module, division module, the control unit of voltage reduction module composition are by comparator LM393, power regulator
TPS53319 and divider resistance are constituted, as shown in Fig. 2 it is responsible for real-time monitoring power supply, once power-off sends control signal, in case
Circuit system opens power down protection pattern.In one circuit system, it may be necessary to which multiple voltages complete corresponding function, Vmax
It is maximum of which magnitude of voltage, it is ensured that can be worked on after system power failure, it is necessary to which each voltage is normal.Herein, it is only necessary to
See Vmax.Vcom=R2/ (R1+R2) × Vin, in R1 and R2 values, in the presence of input power Vin, it is ensured that
Vcom>Vmax, Control are output as 0；When external input power Vin accident power-offs, Vcom<Vmax, Control are output as
1, the function of some independent modules can be turned off, to save electricity, it is ensured that main operation can be normally completed.
The energy unit of voltage reduction module, energy-storage module and boost module composition, as shown in Fig. 3 .1,3.2, uses work
The less super capacitor of voltage so that the unit take up space it is smaller.From power regulator MAX1776, by input electricity
Pressure Vin is adjusted to low pressure V1, including diode D3 pressure drops, according to formula V1=1.25 × (R4+R5)/R4, can adjust defeated
Go out voltage V1, wherein R4=10K Ω.If being charged to 5V 1F super capacitors with 5V, R4=30K Ω, under system effective voltage
Limit is 3V, then the effective electricity of super capacitor is (5V-3V) × 1F=2 coulomb.If the current drain of super capacitor is
10A, then it is 0.2 second that super capacitor can also maintain the time that system works.If from the super capacitor of Large Copacity, maintaining work
Making the time can also increase.
Connected with diode by between power down protection voltage Vout and system input voltage vin after energy-storage module boosting
Connect, it is not necessary to which when control needs connection system input voltage, when need to be input into power down protection voltage.Use power regulator
TPS55340 so that power down protection voltage Vout about 0.4Vs small compared with system input voltage vin（Diode drop）, ensure that system is defeated
Enter voltage it is normal when, consume system input voltage.According to formula Vout=1.229 × (R8/R9+1), in can extrapolating Fig. 3
The relation of R8/R9.
Claims (5)
1. a kind of power-down protection circuit, it is characterised in that main by power detecting module, division module, voltage reduction module, energy storage mould
Block and boost module are constituted；
Power detecting module, division module, the control unit real-time monitoring power supply of voltage reduction module composition, once power-off sends control
Signal, in case circuit system opens power down protection pattern；
The energy unit of voltage reduction module, energy-storage module and boost module composition, takes up space what is matched using with the unit
The super capacitor of operating voltage；
By power detecting module, division module and voltage reduction module for circuit system provides power-off signal, make the circuit system can
To timely respond to the event；Step-down, energy storage and boost module provide the electric energy of a period of time for circuit system, prevent unexpected power down
And lose data and operation.
2. protection circuit according to claim 1, it is characterised in that
Connected with diode by between power down protection voltage and system input voltage after energy-storage module boosting, power down protection electricity
Pressure about 0.4V small compared with system input voltage.
3. protection circuit according to claim 1, it is characterised in that
Control unit is made up of comparator LM393, power regulator TPS53319 and divider resistance.
4. protection circuit according to claim 1, it is characterised in that
Energy unit selects power regulator MAX1776, is low pressure by input voltage regulation, including diode drop, adjusts
Section output voltage.
5. protection circuit according to claim 2, it is characterised in that
By using power regulator TPS55340 so that power down protection voltage about 0.4V small compared with system input voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710103040.2A CN106886273A (en) | 2017-02-24 | 2017-02-24 | A kind of power-down protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710103040.2A CN106886273A (en) | 2017-02-24 | 2017-02-24 | A kind of power-down protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106886273A true CN106886273A (en) | 2017-06-23 |
Family
ID=59179936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710103040.2A Pending CN106886273A (en) | 2017-02-24 | 2017-02-24 | A kind of power-down protection circuit |
Country Status (1)
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| CN (1) | CN106886273A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222028A (en) * | 2017-08-09 | 2017-09-29 | 青岛东软载波科技股份有限公司 | A kind of power information collecting device, which has a power failure, reports implementation method and circuit |
| CN107561457A (en) * | 2017-08-30 | 2018-01-09 | 陕西千山航空电子有限责任公司 | A kind of built-in independent current source status monitoring circuit |
| CN109104091A (en) * | 2018-08-13 | 2018-12-28 | 深圳市普威技术有限公司 | A kind of power circuit and power supply adaptor |
| CN110224479A (en) * | 2019-05-22 | 2019-09-10 | 珠海格力电器股份有限公司 | A kind of power-down protection apparatus, control system and its power-off protection method |
| CN112579484A (en) * | 2019-09-29 | 2021-03-30 | 北京声智科技有限公司 | Power-down state protection method and device for intelligent sound box and main board power supply circuit |
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| JP3035922B2 (en) * | 1989-07-06 | 2000-04-24 | 松下電器産業株式会社 | Power circuit protection device |
| US20080191556A1 (en) * | 2005-07-28 | 2008-08-14 | Eppscore Co., Ltd. | Uninterruptible Power Supply for the Back up of Dc Power Source |
| CN103944254A (en) * | 2014-04-15 | 2014-07-23 | 福建星网视易信息系统有限公司 | Power-fail protection circuit and device |
| CN204706353U (en) * | 2015-06-17 | 2015-10-14 | 深圳市科华恒盛科技有限公司 | A kind of data memory protection circuit |
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2017
- 2017-02-24 CN CN201710103040.2A patent/CN106886273A/en active Pending
Patent Citations (4)
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| JP3035922B2 (en) * | 1989-07-06 | 2000-04-24 | 松下電器産業株式会社 | Power circuit protection device |
| US20080191556A1 (en) * | 2005-07-28 | 2008-08-14 | Eppscore Co., Ltd. | Uninterruptible Power Supply for the Back up of Dc Power Source |
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Non-Patent Citations (4)
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| 德州仪器: "《TPS5331X用户手册》", 31 December 2016 * |
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| 美信公司: "《MAX1776用户手册》", 31 December 2013 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222028A (en) * | 2017-08-09 | 2017-09-29 | 青岛东软载波科技股份有限公司 | A kind of power information collecting device, which has a power failure, reports implementation method and circuit |
| CN107222028B (en) * | 2017-08-09 | 2020-10-09 | 青岛东软载波科技股份有限公司 | Power failure reporting implementation method and circuit for power consumption information acquisition equipment |
| CN107561457A (en) * | 2017-08-30 | 2018-01-09 | 陕西千山航空电子有限责任公司 | A kind of built-in independent current source status monitoring circuit |
| CN109104091A (en) * | 2018-08-13 | 2018-12-28 | 深圳市普威技术有限公司 | A kind of power circuit and power supply adaptor |
| CN110224479A (en) * | 2019-05-22 | 2019-09-10 | 珠海格力电器股份有限公司 | A kind of power-down protection apparatus, control system and its power-off protection method |
| CN112579484A (en) * | 2019-09-29 | 2021-03-30 | 北京声智科技有限公司 | Power-down state protection method and device for intelligent sound box and main board power supply circuit |
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Application publication date: 20170623 |
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| RJ01 | Rejection of invention patent application after publication |