CN203747497U - Standby power supply switching device during power off - Google Patents
Standby power supply switching device during power off Download PDFInfo
- Publication number
- CN203747497U CN203747497U CN201420053997.2U CN201420053997U CN203747497U CN 203747497 U CN203747497 U CN 203747497U CN 201420053997 U CN201420053997 U CN 201420053997U CN 203747497 U CN203747497 U CN 203747497U
- Authority
- CN
- China
- Prior art keywords
- switching device
- power
- electric pressure
- control circuit
- pressure converter
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a standby power supply switching device during power off. The device comprises a control circuit and a standby power supply, wherein the control circuit is connected with the standby power supply, an external memory and an input circuit of the external memory. When it is detected that the input circuit is powered off, the standby power supply supplies power to the memory. According to the technical scheme, the standby power supply switching device is especially suitable for light current; when a system is restarted after power off, the power-off time is within the endurance range of a standby power supply, and data contents which are being operated in real time are not lost; and after restarting, operation in the last stage can be continued, and thus data reliability is ensured.
Description
Technical field
The utility model relates to the power supply of random asccess memory, in particular, and a kind of switching device shifter of power-off stand-by power supply.
Background technology
In some electric equipments; need to carry out not power down protection to the data in random access memory ram (Random Access Memory, random access memory), especially DDR(Double Data Rate; be DDR SDRAM, Double Data Rate synchronous DRAM).After device shutdown power supply, be switched to reserve battery RAM is continued to power supply, the data in RAM just can not lost like this, and after start next time, these data still can be used.If instrument and equipment RAM is little, 1 to 2 storage particle only, little power consumption, Switching power does not need much electric weight.Also can use in another case battery and do not power down power supply, be exactly clock circuit.Clock circuit, in order to preserve year, month, day, hour, min, therefore needs with not power down power supply.
Therefore there is the demand to not power down power supply in existing system.And electrical source exchange is present in various different application field, comprise forceful electric power, light current, large electric current, little electric current etc.The power supply object of stand-by power supply is also different, and various switching utility models also have feature separately.
For example, adopt RTC electrical source exchange, for guaranteeing to start shooting at power-off restarting, temporal information is still preserved, must offer RTC chip Minimum requirements power supply, because its required electric current is very micro-, therefore only need very little button cell to keep apart by a diode and main power source.
Or, adopt ups power to switch, for guaranteeing large-scale machine system continuous firing, needing provides large power supply for it.Ups power is to provide large voltage, and as mains-supplied, for whole system provides the quick power supply after civil power power down, its inside also exists a circuit switching fast.Conventional USB switching utilizes static switch, and it is a kind of noncontacting switch, is a kind of alternating-current switch forming with two controllable silicons (SCR) reverse parallel connection, and its closed and disconnected is controlled by logic controller.Be divided into conversion hysteria and and two kinds of types.Conversion hysteria switch is mainly used in the system of two-way Power supply, and its effect is to realize Cong Yi road to the automatic switchover on another road; And type switch is mainly used in shunt chopper and civil power or many inverters.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of apparatus for fast switching of novel power-off stand-by power supply.
The technical solution of the utility model is as follows: a kind of apparatus for fast switching of power-off stand-by power supply, and it comprises control circuit, backup battery; Described control circuit connects described backup battery; Described control circuit also connects respectively outside internal memory and input circuit thereof, for when detecting described input circuit power-off, by described backup battery, is that described internal memory is powered.
Preferably, described switching device shifter also comprises the first electric pressure converter, and described backup battery connects described internal memory by described the first electric pressure converter.
Preferably, in described switching device shifter, described control circuit arranges control switch, and it connects a MOS (metal-oxide-semiconductor) transistor, and described backup battery connects described the first electric pressure converter by described MOS (metal-oxide-semiconductor) transistor.
Preferably, in described switching device shifter, described MOS (metal-oxide-semiconductor) transistor is the MOS (metal-oxide-semiconductor) transistor of P raceway groove; Its grid connects described control switch, and its source electrode connects its drain electrode of described the first electric pressure converter, connects described backup battery; Described control circuit, for when detecting described input circuit power-off, is controlled described MOS (metal-oxide-semiconductor) transistor by described control switch, thereby control described backup battery, whether is communicated with described the first electric pressure converter.
Preferably, in described switching device shifter, the read-write output that described control circuit setting is connected with described the first electric pressure converter, for controlling the switch of described the first electric pressure converter.
Preferably, in described switching device shifter, described control circuit arranges detecting power down sampling unit; Described control circuit connects described input circuit by described detecting power down sampling unit, for detection of the whether power-off of described input circuit.
Preferably, in described switching device shifter, described detecting power down sampling unit arranges voltage sample device, for by two voltages of relatively sampling, judges the whether power-off of described input circuit.
Preferably, in described switching device shifter, the chargeable lithium cell that described backup battery is 4.2V, described the first electric pressure converter is that 4.2V turns 1.5V electric pressure converter.
Preferably, described switching device shifter also comprises described internal memory and input circuit thereof.
Preferably, in described switching device shifter, described input circuit also arranges storage capacitor and second voltage transducer; Described storage capacitor connects described internal memory by described second voltage transducer.
Adopt such scheme, the utility model is when the input circuit power-off of internal memory, and adopting backup battery is internal memory power supply, has good practicality.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of the present utility model;
Fig. 2 is the frame structure schematic diagram of an embodiment of the present utility model.
Embodiment
For the ease of understanding the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in detail.In accompanying drawing, provided preferred embodiment of the present utility model.But the utility model can adopt many different forms to realize, and is not limited to the described embodiment of this specification.On the contrary, providing the object of these embodiment is to make to the understanding of disclosure of the present utility model more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, can directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may have centering elements simultaneously.The term that this specification is used " vertical ", " level ", " left side ", " right side " and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology that this specification is used are identical with the implication that belongs to the common understanding of those skilled in the art of the present utility model with scientific terminology.The term using in specification of the present utility model in this specification, just in order to describe the object of specific embodiment, is not for limiting the utility model.The term "and/or" that this specification is used comprise one or more relevant Listed Items arbitrarily with all combinations.
Common power consumption equipment is under the unexpected powering-off state of dispatch from foreign news agency, and the equal power-off of other functions of modules quits work, but will guarantee the buffer memory at power-off moment RAM Cache() in dynamic data do not lose, therefore be necessary for it, provide continued power.As shown in Figure 1, an embodiment of the present utility model is, a kind of switching device shifter of power-off stand-by power supply, and it comprises control circuit, backup battery; Described control circuit connects described backup battery; Described control circuit also connects respectively outside internal memory and input circuit thereof, for when detecting described input circuit power-off, by described backup battery, is that described internal memory is powered; Be a kind of apparatus for fast switching of power-off stand-by power supply.Like this; by the quick Switching power of control circuit to backup battery; by backup battery, provide backup battery to power; the application of data protection is provided in time; being particularly useful for light current switches; preserve real-time status information, especially in field of storage, realize the battery that mass data is kept at internal memory and switch fast.
The switching device shifter of power-off stand-by power supply of the present utility model, be a kind of apparatus for fast switching, be particularly useful for light current, and electric current is moderate, be that electric current is little also not little, for example 10 to 1500 milliamperes, preferred, 200 to 1000 milliamperes, such as supporting the stand-by circuit of 1 to 2 DDR3 memory bar, backup voltage is provided, even like this after the power down of instrument principal voltage, internal memory RAM data still retain.For example, a kind of apparatus for fast switching of power-off stand-by power supply, it comprises control circuit, backup battery; Described control circuit connects described backup battery; Described control circuit also connects respectively outside internal memory and input circuit thereof; And for example, as shown in Figure 2, an embodiment of the present utility model is, a kind of switching device shifter of power-off stand-by power supply, and it comprises control circuit, backup battery; Described control circuit connects described backup battery; Described control circuit also arranges Memory linkage end, input circuit the first link and input circuit the second link.Described Memory linkage end connects outside internal memory, and described input circuit the first link is connected respectively input circuit with described input circuit the second link, for when detecting described input circuit power-off, by described backup battery, is that described internal memory is powered.
Requirement analysis to DDR3 Memory Backup voltage, DDR3 memory bar is also comprised of a plurality of RAM particles, supply power voltage, high voltage version is 1.5V VDDR(Voltage DDR, internal memory supply power voltage), 0.75V VTT(Tracking Termination Voltage, monitors final voltage).The feature of RAM is that reading speed is fast, is used for the immediate data exchange of CPU, and inner Cache etc. mostly are RAM, but need to its continued power not lost to maintain data.In order to keep RAM continued power to such an extent as to data are not lost, only need principal voltage 1.5V power supply, the VTT of 0.75V can not need.Therefore the utility model will switch and elaborate for 1.5V light current.Preferably, described switching device shifter also comprises the first electric pressure converter, and described backup battery connects described internal memory by described the first electric pressure converter.
For guaranteeing the continued power of 1 standby DDR memory bar, suppose that power supply keeps 24 hours, need it to continue to provide 1.5V voltage, guarantee its IDD6 self-refresh electric current.Take Samsung M378B5273DH04GB512MX64 as example, need to provide lasting IDD6 to be 192mA to the maximum.Although electric current, voltage are all less, need realize it and switch fast, with pressure reduction and the internal resistance loss of existence itself of general-purpose diode, are not suitable for continued power.And low-voltage is switched and also had electronically controlled bad operability, therefore select the chargeable lithium cell power supply of 4.2V, for example, battery capacity is 5200mAH.For example, as shown in Figure 2, the chargeable lithium cell that described backup battery is 4.2V, described the first electric pressure converter is that 4.2V turns 1.5V electric pressure converter, for the backup power source voltage of 4.2V being transferred to the internal memory required voltage of 1.5V.
For realizing quick switched voltage, and reduce loss, 4.2V voltage is done to switching controls, after switching, make again it by DC-DC synchronous buck type power-supply controller of electric, be converted to the required voltage 1.5V of equipment.Switch 4.2V voltage, can adopt low conduction impedance, respond the MOS of P raceway groove rapidly, utilize gate driving voltage-12V as controlling its switch conduction.Preferably, in described switching device shifter, described control circuit arranges control switch, and it connects a MOS(Metal Oxide Silicon, metal-oxide semiconductor (MOS)) pipe, described backup battery connects described the first electric pressure converter by described MOS (metal-oxide-semiconductor) transistor.Preferably, as shown in Figure 2, described MOS (metal-oxide-semiconductor) transistor is the MOS (metal-oxide-semiconductor) transistor of P raceway groove; Its grid connects described control switch, and its source electrode connects its drain electrode of described the first electric pressure converter, connects described backup battery; Described control circuit, for when detecting described input circuit power-off, is controlled described MOS (metal-oxide-semiconductor) transistor by described control switch, thereby control described backup battery, whether is communicated with described the first electric pressure converter.
For example, first judgment device principal voltage power down, and do not fallen completely under the energy storage of large electric capacity, execution-12V Voltage-output is opened P-MOS switch, makes the cell voltage switching of 4.2V come to provide supply power voltage to 1.5V electric pressure converter.Can consider to increase the closing control that enables of electric pressure converter simultaneously.During normal principal voltage power supply, all close voltage transitions output.
Detecting principal voltage power down instantaneous variation, and make quick control MOS switch, and can provide the charge function to battery 4.2V during normal power supply.Specific implementation can consider to select TI(Texas Instrument) the charging IC bq24133 of company.
Preferably, in described switching device shifter, the read-write output that described control circuit setting is connected with described the first electric pressure converter, for controlling the switch of described the first electric pressure converter.As shown in Figure 2, described control circuit arranges IO, and it connects this 4.2V and turns 1.5V electric pressure converter, controls this 4.2V and turns enabling of 1.5V electric pressure converter and anergy.
Preferably, in described switching device shifter, described control circuit arranges detecting power down sampling unit; Described control circuit connects described input circuit by described detecting power down sampling unit, for detection of the whether power-off of described input circuit.For example, described control circuit arranges detecting power down sampling unit; Described input circuit arranges a precision resistance; Described detecting power down sampling unit connects respectively described precision resistance two ends; Described control circuit detects the whether power-off of described input circuit by described detecting power down sampling unit.Preferably, described detecting power down sampling unit arranges voltage sample device, for by two voltages of relatively sampling, judges the whether power-off of described input circuit.
In conjunction with being applied to above-mentioned arbitrary embodiment, preferred, described switching device shifter also comprises described internal memory and input circuit thereof.Preferably, in described switching device shifter, described input circuit also arranges storage capacitor and second voltage transducer; Described storage capacitor connects described internal memory by described second voltage transducer.Preferably, described second voltage transducer is that 12V turns 1.5V electric pressure converter, for the input circuit voltage of 12V being transferred to the internal memory required voltage of 1.5V.Preferably, as shown in Figure 2, described input circuit also arranges precision resistance, and board principal voltage is through precision resistance to second voltage transducer, and after conversion, power supply is to internal memory.Preferably, detecting power down sampling unit connects respectively the two ends of precision resistance, by detecting its voltage, determines the whether power-off of described input circuit.For example, described input circuit the first link and described input circuit the second link are connected respectively the two ends of precision resistance.
Further, embodiment of the present utility model also comprises, each technical characterictic of the various embodiments described above, the apparatus for fast switching of the power-off stand-by power supply being mutually combined to form.After system cut-off, restart, power-off time, within the scope of reserve battery flying power, is not just lost at the data content of real-time operation, again, after starting up, can maintain operation on last stage and proceed.Guarantee the reliability of data.
It should be noted that, above-mentioned each technical characterictic continues combination mutually, forms the various embodiment that do not enumerate in the above, is all considered as the scope that the utility model specification is recorded; And, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (8)
1. a switching device shifter for power-off stand-by power supply, is characterized in that, comprises control circuit, backup battery;
Described control circuit connects described backup battery;
Described control circuit also connects respectively outside internal memory and input circuit thereof, described control circuit arranges detecting power down sampling unit, described control circuit connects described input circuit by described detecting power down sampling unit, described detecting power down sampling unit arranges voltage sample device, be used for by two voltages of relatively sampling, judging the whether power-off of described input circuit, when detecting described input circuit power-off, is that described internal memory is powered by described backup battery.
2. switching device shifter according to claim 1, is characterized in that, also comprise the first electric pressure converter, described backup battery connects described internal memory by described the first electric pressure converter.
3. switching device shifter according to claim 2, is characterized in that, described control circuit arranges control switch, and it connects a MOS (metal-oxide-semiconductor) transistor, and described backup battery connects described the first electric pressure converter by described MOS (metal-oxide-semiconductor) transistor.
4. switching device shifter according to claim 3, is characterized in that, described MOS (metal-oxide-semiconductor) transistor is the MOS (metal-oxide-semiconductor) transistor of P raceway groove;
Its grid connects described control switch, and its source electrode connects its drain electrode of described the first electric pressure converter, connects described backup battery;
Described control circuit, for when detecting described input circuit power-off, is controlled described MOS (metal-oxide-semiconductor) transistor by described control switch, thereby control described backup battery, whether is communicated with described the first electric pressure converter.
5. switching device shifter according to claim 4, is characterized in that, the read-write output that described control circuit setting is connected with described the first electric pressure converter, for controlling the switch of described the first electric pressure converter.
6. switching device shifter according to claim 5, is characterized in that, the chargeable lithium cell that described backup battery is 4.2V, and described the first electric pressure converter is that 4.2V turns 1.5V electric pressure converter.
7. according to the arbitrary described switching device shifter of claim 1 to 6, it is characterized in that, also comprise described internal memory and input circuit thereof.
8. switching device shifter according to claim 7, is characterized in that, described input circuit also arranges storage capacitor and second voltage transducer;
Described storage capacitor connects described internal memory by described second voltage transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053997.2U CN203747497U (en) | 2014-01-27 | 2014-01-27 | Standby power supply switching device during power off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053997.2U CN203747497U (en) | 2014-01-27 | 2014-01-27 | Standby power supply switching device during power off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203747497U true CN203747497U (en) | 2014-07-30 |
Family
ID=51347254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420053997.2U Expired - Fee Related CN203747497U (en) | 2014-01-27 | 2014-01-27 | Standby power supply switching device during power off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203747497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346164A (en) * | 2017-06-02 | 2017-11-14 | 江苏万邦微电子有限公司 | A kind of power-supply management system |
| CN110021993A (en) * | 2019-04-30 | 2019-07-16 | 合肥巨一动力系统有限公司 | A kind of anti-down fill system of the power supply of electric machine controller |
-
2014
- 2014-01-27 CN CN201420053997.2U patent/CN203747497U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346164A (en) * | 2017-06-02 | 2017-11-14 | 江苏万邦微电子有限公司 | A kind of power-supply management system |
| CN110021993A (en) * | 2019-04-30 | 2019-07-16 | 合肥巨一动力系统有限公司 | A kind of anti-down fill system of the power supply of electric machine controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103777537B (en) | A kind of low power consumpting controling circuit and storage device | |
| CN105468127B (en) | A kind of real-time data acquisition system and its power failure data storage circuit, method | |
| CN102033826B (en) | Power failure data protection device and method for internal memory | |
| CN102156679B (en) | PCIE interface-based solid state disk power-down protection method and device | |
| US8090988B2 (en) | Saving information to flash memory during power failure | |
| CN103092315B (en) | The mobile terminal of rear recovery application program can be restarted | |
| CN2560039Y (en) | Data-processing equipment without missing data after power-off | |
| CN202013570U (en) | Power down protecting device for solid state disk based on PCIE (Peripheral Component Interface Express) interface | |
| CN103210560A (en) | Battery power path management apparatus and methods | |
| CN101826060A (en) | Method and device for protecting power failure data of solid state disk | |
| CN202512170U (en) | Intelligent ammeter communication module circuit structure having power-off protection function | |
| CN105807885B (en) | Power failure protection method and device | |
| WO2019218882A1 (en) | Super-capacitor application circuit of replaceable battery type smart electric energy meter power supply | |
| CN101261532B (en) | Electronic device energy supply control module and energy supply control method | |
| CN201036001Y (en) | Magnetic disk array device | |
| CN204302966U (en) | A kind of power-down protection apparatus preventing Raid data of magnetic disk array from losing | |
| CN203747497U (en) | Standby power supply switching device during power off | |
| CN103713726B (en) | A kind of SCM system with power-saving working mode | |
| CN101771291A (en) | Low-voltage double-power supply loop device and control method thereof | |
| CN103064497A (en) | Power source delayed power supply device, network main board and network host | |
| CN202887178U (en) | Electronic device capable of realizing power-off protection of hard disc | |
| CN201789331U (en) | Aircraft engine power system | |
| CN103107577B (en) | Battery management circuit and terminal | |
| CN201570897U (en) | Two-supply switching circuit for electronic-type electric energy meter | |
| CN101202458A (en) | Power supply circuit |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20180127 |