CN107132900A - A kind of hard disk backup power supply system and storage device - Google Patents

Abstract

The present application discloses a hard disk backup power system and a storage device, wherein the hard disk backup power system charges the power storage module after stepping down the operating voltage through a current limiting module. When the working power fails, the booster The voltage module starts to work, boosts the voltage of the power storage module to supply power to the hard disk of the storage device, so that the hard disk can complete the storage of unsaved data after an accidental power failure, and avoid data loss. Moreover, the rated voltage of the power storage module of the hard disk backup power system is low, and smaller capacitors such as ion capacitors or super capacitors can be used as the power storage module, thereby realizing the reduction of the volume of the hard disk backup power system Purpose. Further, the circuit structure of the current limiting module is simpler than that of the step-down module, which can reduce the circuit complexity of the hard disk backup system.

Description

Hard disk backup power system and storage device

technical field

The present application relates to the technical field of circuit design, and more specifically, to a hard disk backup system and a storage device.

Background technique

Storage devices are widely used in various electronic products and electronic service systems. For some storage devices with special application scenarios, a hard disk backup system is an important means to ensure the integrity of the hard disk data in the storage device.

Taking the storage device used in the search server as an example, in order to ensure that the storage device saves unsaved data after the system unexpectedly loses power, it is necessary to equip the storage device with a hard disk backup system to rely on the hard disk backup power after the external power supply of the system stops. The system provides the storage device with the working power required to save data.

The hard disk backup power system in the prior art mainly relies on electrolytic capacitors to provide working power for storage devices through a step-down circuit after the external power supply of the system stops. The specific structure is shown in Figure 1, including: a boost circuit, a step-down circuit, or gate and electrolytic capacitor; in the application process, under normal conditions, the working power is boosted by the booster circuit to charge the electrolytic capacitor. Send a start command to start the step-down circuit. The electricity stored in the electrolytic capacitor is stepped down by the step-down circuit and then supplies power to the storage device through the OR gate, so that the storage device can save the unsaved data when the power is unexpectedly cut off to avoid data loss.

However, due to the large volume of the electrolytic capacitor, the overall volume of the hard disk backup power system is large, and it is difficult to meet the increasingly miniaturized requirements of storage devices.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a hard disk backup system and a storage device, so as to reduce the volume of the hard disk backup system, thereby reducing the volume of the storage device.

In order to achieve the above technical objectives, the embodiments of the present invention provide the following technical solutions:

A hard disk backup power system, which is applied to a storage device, the storage device includes a hard disk, and the hard disk backup power system includes: a power storage module, a current limiting module, a boost module and a logic module; wherein,

The input end of the current limiting module is connected to the working power supply of the storage device, and the output end of the current limiting module is connected to the input ends of the power storage module and the booster module;

The first input end of the logic module is connected to the working power supply of the storage device, the second input end of the logic module is connected to the output end of the boost module, and the output end of the logic module is connected to the hard disk connect;

The current limiting module is used to step down the input working power supply to the voltage at both ends of the power storage module and then output it to the power storage module, and the voltage at both ends of the power storage module is greater than or equal to a preset voltage , stop outputting voltage to the power storage module;

The boost module is used to boost the output voltage of the power storage module and then output it to the logic module after receiving the startup instruction;

The logic module is used to perform an OR operation on the voltages input from the first input terminal and the second input terminal and output them.

Optionally, the power storage module is an ion capacitor or a super capacitor.

Optionally, one end of the power storage module away from the current limiting module is grounded.

Optionally, the logic module is an OR gate.

Optionally, the boost module includes: a first resistor, a first triode, a first capacitor, and a first diode; wherein,

One end of the first resistor is used as the input end of the boost module, and the other end is connected to the drain of the first triode and the anode of the first diode;

The cathode of the first diode is connected to one end of the first capacitor as the output end of the boost module, and the end of the first capacitor far away from the first diode is grounded;

The source of the first triode is grounded.

Optionally, the current limiting module includes: a second resistor, a second triode, a third resistor and a fourth resistor; wherein,

The drain of the second triode is connected to one end of the second resistor as the input end of the current limiting module, and the gate of the second triode is connected to the other end of the second resistor connected to one end of the third resistor, and the source of the second triode is connected to one end of the fourth resistor;

An end of the third resistor far away from the second resistor is connected to an end of the fourth resistor far away from the second triode as an output end of the current limiting module.

Optionally, the second triode is an NPN transistor.

A storage device, including: a hard disk and the hard disk backup power system according to any one of the above.

Optionally, the hard disk is a solid state hard disk.

It can be seen from the above technical solutions that the embodiments of the present invention provide a hard disk backup system and storage device, wherein the hard disk backup system charges the power storage module after stepping down the operating voltage through a current limiting module, When the working power supply fails, the booster module starts to work, boosts the voltage of the power storage module to supply power to the hard disk of the storage device, so that the hard disk can complete the storage of unsaved data after an unexpected power failure, Data loss is avoided. Moreover, the rated voltage of the power storage module of the hard disk backup power system is low, and smaller capacitors such as ion capacitors or super capacitors can be used as the power storage module, thereby realizing the reduction of the volume of the hard disk backup power system Purpose.

Further, the circuit structure of the current limiting module is simpler than that of the step-down module, which can reduce the circuit complexity of the hard disk backup system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural view of a hard disk backup system in the prior art;

FIG. 2 is a schematic structural diagram of a hard disk backup system provided by an embodiment of the present application;

Fig. 3 is a schematic circuit structure diagram of a boost module provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a circuit structure of a current limiting module provided by an embodiment of the present application.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the present application provides a hard disk backup power system, as shown in Figure 2, which is applied to storage devices, the storage device includes a hard disk, and the hard disk backup power system includes: Pressure module 200 and logic module 300; Wherein,

The input terminal of the current limiting module 100 is connected to the working power supply of the storage device, and the output terminal of the current limiting module 100 is connected to the input terminals of the power storage module 400 and the boost module 200;

The first input terminal of the logic module 300 is connected to the working power supply of the storage device, the second input terminal of the logic module 300 is connected to the output terminal of the boost module 200, and the output terminal of the logic module 300 connected with the hard disk;

The current limiting module 100 is used to step down the input working power supply to the voltage at both ends of the power storage module 400 and then output it to the power storage module 400, and the voltage at both ends of the power storage module 400 is greater than or When the voltage is equal to the preset voltage, stop outputting the voltage to the power storage module 400;

The boost module 200 is configured to boost the output voltage of the power storage module 400 and then output it to the logic module 300 after receiving a startup instruction;

The logic module 300 is used for performing an OR operation on the voltages input from the first input terminal and the second input terminal and then outputting.

It should be noted that in the prior art hard disk backup power system, the 12V operating voltage is generally boosted to 35V to charge the electrolytic capacitor. When the 12V operating voltage fails, the voltage of the 35V electrolytic capacitor is reduced to Drop down to 12V to power the storage device. However, since the electrolyte of the electrolytic capacitor is an electrolyte, the life of the electrolyte decays very seriously at high temperatures, and it is difficult to ensure a long service life of the hard disk backup system. In addition, the volume of the high-voltage electrolytic capacitor is relatively large, which is not conducive to The miniaturization of the hard disk backup power system, and due to the working characteristics of the high-voltage backup power of the hard disk backup power system, make it difficult to be compatible with supercapacitors.

In this embodiment, the hard disk backup system uses the current limiting module 100 to step down the operating voltage to charge the power storage module 400. When the working power fails, the boost module 200 starts to work, and the The voltage of the power storage module 400 is boosted to supply power to the hard disk of the storage device, so that the hard disk completes the storage of unsaved data after an accidental power failure, thereby avoiding data loss. Moreover, the rated voltage of the power storage module 400 of the hard disk backup power system is low, and smaller capacitors such as ion capacitors or super capacitors can be used as the power storage module 400, thereby reducing the power consumption of the hard disk backup power system. purpose of volume.

In addition, the high temperature stability of ionic capacitors is much higher than that of electrolytic capacitors, which can also improve the service life of the hard disk backup system. The hard disk backup system compatible with supercapacitors or special-shaped supercapacitors provides technical support for future ultra-thin SSD backup solutions.

Further, the circuit structure of the current limiting module 100 is simpler than that of the step-down module, which can reduce the circuit complexity of the hard disk backup system.

It should be noted that the startup instruction refers to the instruction sent to the boost circuit after the detection circuit of the storage device detects that the working power is abnormal, so that the boost circuit starts to work. The specific principle is the same as that of the prior art. The startup command sent by the hard disk backup power system in the step-down circuit to the step-down circuit is similar, and this application will not repeat them here.

It should also be noted that the logic module 300 is generally an OR gate.

In one embodiment of the present application, the power storage module 400 is an ion capacitor or a super capacitor. In other embodiments of the present application, the power storage module 400 may also be a special-shaped supercapacitor. The present application does not limit the specific type of the power storage module 400, which depends on the actual situation.

In another embodiment of the present application, one end of the power storage module 400 away from the current limiting module 100 is grounded.

In other embodiments of the present application, the end of the power storage module 400 away from the current limiting module 100 may also be connected to other fixed potentials, such as 1V, -1V and so on. This application does not limit it, and it depends on the actual situation.

Based on the above embodiments, in a specific embodiment of the present application, as shown in FIG. 3 , the boost module 200 includes: a first resistor R1, a first transistor Q1, a first capacitor C1 and a A diode D1; where,

One end of the first resistor R1 is used as the input end of the boost module 200, and the other end is connected to the drain of the first triode Q1 and the anode of the first diode D1;

The cathode of the first diode D1 is connected to one end of the first capacitor C1 as the output end of the boost module 200, and the end of the first capacitor C1 far away from the first diode D1 is grounded. ;

The source of the first triode Q1 is grounded.

Referring to FIG. 4, the current limiting module 100 includes: a second resistor R2, a second transistor Q2, a third resistor R3 and a fourth resistor R4; wherein,

The drain of the second transistor Q2 is connected to one end of the second resistor R2 as the input terminal of the current limiting module 100, and the gate of the second transistor Q2 is connected to the second resistor R2. The other end of the resistor R2 is connected to one end of the third resistor R3, and the source of the second triode Q2 is connected to one end of the fourth resistor R4;

An end of the third resistor R3 far away from the second resistor R2 is connected to an end of the fourth resistor R4 far away from the second transistor Q2 as an output end of the current limiting module 100 .

In the current limiting module 100, when the current is lower than the preset voltage, the second resistor R2 provides the bias current of the second transistor Q2, and the second transistor Q2 is saturated and turned on, and has no control effect on the current , when the current is greater than or equal to the preset voltage, the voltage drop across the fourth resistor R4 increases, and the sum of the voltage drop across the fourth resistor R4 and the junction voltage of the second transistor Q2 is close to the voltage of the third resistor R3 drop, so it begins to limit the current passing through the second transistor Q2, so that the current is limited to a certain level. The second transistor Q2 is an NPN transistor, and in other embodiments of the present application, the second transistor Q2 may also be a Zener transistor. This application does not limit it, and it depends on the actual situation.

It should be noted that the current limiting module 100 and the boosting module 200 contain a total of two triodes, which saves two triodes compared with the hard disk backup system in the prior art, reduces the complexity of the circuit, and reduces The cost of the hard disk backup system.

Correspondingly, an embodiment of the present application further provides a storage device, including: a hard disk and the hard disk backup system as described in any of the above embodiments.

Preferably, the hard disk is a solid state hard disk.

To sum up, the embodiment of the present application provides a hard disk backup power system and storage device, wherein the hard disk backup power system charges the power storage module 400 after stepping down the operating voltage through the current limiting module 100. When the working power supply fails, the boost module 200 starts to work, boosts the voltage of the power storage module 400 to supply power to the hard disk of the storage device, so that the hard disk can complete the storage of unsaved data after an unexpected power failure. , to avoid data loss. Moreover, the rated voltage of the power storage module 400 of the hard disk backup power system is low, and smaller capacitors such as ion capacitors or super capacitors can be used as the power storage module 400, thereby reducing the power consumption of the hard disk backup power system. purpose of volume.

Further, the circuit structure of the current limiting module 100 is simpler than that of the step-down module, which can reduce the circuit complexity of the hard disk backup system.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A hard disk backup power system, characterized in that it is applied to a storage device, the storage device includes a hard disk, and the hard disk backup power system includes: a power storage module, a current limiting module, a boost module and a logic module; wherein, The input end of the current limiting module is connected to the working power supply of the storage device, and the output end of the current limiting module is connected to the input ends of the power storage module and the booster module; The first input end of the logic module is connected to the working power supply of the storage device, the second input end of the logic module is connected to the output end of the boost module, and the output end of the logic module is connected to the hard disk connect; The current limiting module is used to step down the input working power supply to the voltage at both ends of the power storage module and then output it to the power storage module, and the voltage at both ends of the power storage module is greater than or equal to a preset voltage , stop outputting voltage to the power storage module; The boost module is used to boost the output voltage of the power storage module and then output it to the logic module after receiving the startup instruction; The logic module is used to perform an OR operation on the voltages input from the first input terminal and the second input terminal and output them. 2. The system according to claim 1, wherein the power storage module is an ion capacitor or a super capacitor. 3. The system according to claim 1, wherein one end of the power storage module away from the current limiting module is grounded. 4. The system according to claim 1, wherein the logic module is an OR gate. 5. The system according to claim 1, wherein the boost module comprises: a first resistor, a first triode, a first capacitor and a first diode; wherein, One end of the first resistor is used as the input end of the boost module, and the other end is connected to the drain of the first triode and the anode of the first diode; The cathode of the first diode is connected to one end of the first capacitor as the output end of the boost module, and the end of the first capacitor far away from the first diode is grounded; The source of the first triode is grounded. 6. The system according to claim 1, wherein the current limiting module comprises: a second resistor, a second triode, a third resistor and a fourth resistor; wherein, The drain of the second triode is connected to one end of the second resistor as the input end of the current limiting module, and the gate of the second triode is connected to the other end of the second resistor connected to one end of the third resistor, and the source of the second triode is connected to one end of the fourth resistor; An end of the third resistor far away from the second resistor is connected to an end of the fourth resistor far away from the second triode as an output end of the current limiting module. 7. The system according to claim 6, wherein the second transistor is an NPN transistor. 8. A storage device, comprising: a hard disk and the hard disk backup power system according to any one of claims 1-7. 9. The storage device according to claim 8, wherein the hard disk is a solid state hard disk.