Server hard disk protection circuit

Abstract

The utility model relates to a server hard disk protection circuit. A grid electrode of a transistor Q36 is connected with a pin 25 of a capacitor chip, a drain electrode of the transistor Q36 is connected with an external power supply, a grid electrode of a transistor Q37 is connected with a pin 27 of the capacitor chip, a drain electrode of the transistor Q37 is connected with a source electrode of the transistor Q36, one end of an inductor L24 is connected with the drain electrode of the transistor Q37, and the other end of the inductor L24 is connected with the source electrode of the transistor Q36. A pin 24 of the capacitor chip is connected with a drain electrode of the transistor Q37, one end of the resistor R414 is connected with the other end of the inductor L24, the other end of the resistor R414 is connected with a source electrode of the transistor Q35, a grid electrode of the transistor Q35 is connected with a pin 20 of the capacitor chip, and a drain electrode of the transistor Q35 is connected with a server power supply. The technical scheme can be flexibly used in various systems, and the server provides a back-up power supply during power failure, so that the system is protected from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of server protection, and particularly relates to a server hard disk protection circuit. Background Art

[0002] With the continuous development of science and technology, the use scope of servers is getting wider and wider. When the server loses power, the hard disk will also lose power at the same time. Sudden power loss of the hard disk during operation will cause damage to the hard disk data and affect normal work. In the prior art, the power-off protection circuit for the hard disk is insufficient and cannot provide a backup power supply for the hard disk when power is off. Summary of the Utility Model

[0003] The utility model provides a server hard disk protection circuit, aiming at solving the problem of insufficient power-off treatment measures for server hard disks in the prior art.

[0004] The utility model provides a server hard disk protection circuit, which includes a capacitor chip, a transistor Q35, a transistor Q36, a transistor Q37, an inductor L24 and a resistor R414. The gate of the transistor Q36 is connected to the 25th pin of the capacitor chip, the drain of the transistor Q36 is connected to an external power supply, the gate of the transistor Q37 is connected to the 27th pin of the capacitor chip, the drain of the transistor Q37 is connected to the source of the transistor Q36, one end of the inductor L24 is connected to the drain of the transistor Q37, the 24th pin of the capacitor chip is connected to the drain of the transistor Q37, one end of the resistor R414 is connected to the other end of the inductor L24, the other end of the resistor R414 is connected to the source of the transistor Q35, the gate of the transistor Q35 is connected to the 20th pin of the capacitor chip, and the drain of the transistor Q35 is connected to the server power supply.

[0005] As a further improvement of the utility model, when the server power supply is stable, the external power supply charges the capacitor chip through the transistor Q36 and the inductor L24. After the capacitor chip is fully charged, it supplies power to the server power supply. The transistor Q36 and the transistor Q37 form a DCDC buck circuit.

[0006] As a further improvement of the utility model, when the voltage of the capacitor chip is higher than the set voltage, the capacitor chip discharges through the transistor Q35.

[0007] As a further improvement of the utility model, when the voltage of the capacitor chip is lower than the output voltage set by the resistor R406 and the resistor R407, the capacitor chip discharges through the resistor R414, the inductor L24 and the transistor Q36. One end of the resistor R407 is connected to the 7th pin of the capacitor chip, the other end of the resistor R407 is grounded, one end of the resistor R406 is connected to one end of the resistor R407, and the other end of the resistor R406 is connected to the connection line between the external power supply and the server power supply.

[0008] As a further improvement of the present utility model, it further includes a transistor Q34. The gate of the transistor Q34 is connected to the 33rd pin of the capacitor chip. The source of the transistor Q34 is connected to an external power supply. The drain of the transistor Q34 is connected to one end of a resistor 403, and the other end of the resistor 403 is connected to the server power supply.

[0009] As a further improvement of the present utility model, it further includes a capacitor filter circuit. The capacitor filter circuit includes capacitors C600, C601, C602, C603, C604 and C605. One end of the capacitor C600, one end of the capacitor C601, one end of the capacitor C602, one end of the capacitor C603, one end of the capacitor C604 and one end of the capacitor C605 are all connected to the other end of a resistor R414. The other end of the capacitor C600, the other end of the capacitor C601, the other end of the capacitor C602, the other end of the capacitor C603, the other end of the capacitor C604 and the other end of the capacitor C605 are all grounded.

[0010] As a further improvement of the present utility model, the 37th pin of the capacitor chip is connected to one end of a resistor R408, the other end of the resistor R408 is grounded, one end of a resistor R405 is connected to the 37th pin of the capacitor chip, and the other end of the resistor R405 is connected to the wire connecting the external power supply and the server power supply.

[0011] As a further improvement of the present utility model, the 21st pin of the capacitor chip is connected to the other end of a resistor R414, the 22nd pin of the capacitor chip is connected to one end of the resistor R414, the 30th pin of the capacitor chip is connected to one end of a resistor 403, and the 31st pin of the capacitor chip is connected to the other end of the resistor 403.

[0012] As a further improvement of the present utility model, one end of the 16 pins of the capacitor chip is connected to one end of the resistor R418, the other end of the resistor R418 is connected to one end of the resistor R429, one end of the resistor R429 is connected to the source electrode of the transistor Q35, the other end of the resistor R429 is connected to one end of the resistor R430, the other end of the resistor R430 is connected to one end of the resistor R434, the other end of the resistor R434 is grounded, one end of the capacitor C610 is connected to the other end of the resistor R418, the other end of the capacitor C610 is connected to one end of the capacitor C611, one end of the resistor R420 is connected to the other end of the capacitor C610, the other end of the resistor R420 is connected to the 15th pin of the capacitor chip, one end of the capacitor C611 is connected to one end of the resistor R420, the other end of the capacitor C611 is connected to one end of the capacitor C613, one end of the resistor R423 is connected to the other end of the capacitor C611, the other end of the resistor R423 is connected to the 14th pin of the capacitor chip, one end of the capacitor C613 is connected to one end of the resistor R423, the other end of the capacitor C613 is connected to one end of the capacitor C614, one end of the resistor R424 is connected to the other end of the capacitor C613, the other end of the resistor R424 is connected to the 13th pin of the capacitor chip, one end of the capacitor C614 is connected to one end of the resistor R424, the 3rd pin of the capacitor C614 is grounded, the 2nd pin of the capacitor C614 is connected to one end of the resistor R427, the other end of the resistor R427 is connected to the 12th pin of the capacitor chip, and the 6th pin of the capacitor chip is connected to one end of the resistor R434.

[0013] As a further improvement of the present utility model, the model of the capacitor chip adopts LTC3350EUHF.

[0014] The beneficial effects of the present utility model are as follows: This technical solution can be flexibly used in various systems, and two working modes of charging and discharging are designed. When the server loses power, it can provide backup power for the server in time, thereby protecting the system from damage. Description of the Drawings

[0015] Figure 1 is the specific circuit connection diagram of the present utility model;

[0016] Figure 2 is the working principle diagram of the charging and discharging of the circuit of the present utility model. Detailed Embodiment

[0017] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0018] As Figure 1As shown in the figure, the utility model provides a server hard disk protection circuit, which includes a capacitor chip, a transistor Q35, a transistor Q36, a transistor Q37, an inductor L24 and a resistor R414. The gate of the transistor Q36 is connected to the 25th pin of the capacitor chip. The drain of the transistor Q36 is connected to an external power supply. The gate of the transistor Q37 is connected to the 27th pin of the capacitor chip. The drain of the transistor Q37 is connected to the source of the transistor Q36. One end of the inductor L24 is connected to the drain of the transistor Q37. The 24th pin of the capacitor chip is connected to the drain of the transistor Q37. One end of the resistor R414 is connected to the other end of the inductor L24. The other end of the resistor R414 is connected to the source of the transistor Q35. The gate of the transistor Q35 is connected to the 20th pin of the capacitor chip. The drain of the transistor Q35 is connected to the server power supply.

[0019] As an embodiment of the utility model, when the server power supply is stable, the external power supply charges the capacitor chip through the transistor Q36 and the inductor L24. After the capacitor chip is fully charged, it supplies power to the server power supply. The transistor Q36 and the transistor Q37 form a DCDC buck circuit.

[0020] As another embodiment of the utility model, when the voltage of the capacitor chip is higher than the set voltage, the capacitor chip discharges through the transistor Q35.

[0021] As another embodiment of the utility model, when the voltage of the capacitor chip is lower than the output voltage set by the resistor R406 and the resistor R407, the capacitor chip boosts and discharges through the resistor R414, the inductor L24 and the transistor Q36. One end of the resistor R407 is connected to the 7th pin of the capacitor chip. The other end of the resistor R407 is grounded. One end of the resistor R406 is connected to one end of the resistor R407. The other end of the resistor R406 is connected to the connection line between the external power supply and the server power supply.

[0022] As another embodiment of the utility model, it further includes a transistor Q34. The gate of the transistor Q34 is connected to the 33rd pin of the capacitor chip. The source of the transistor Q34 is connected to the external power supply. The drain of the transistor Q34 is connected to one end of the resistor 403. The other end of the resistor 403 is connected to the server power supply. The function of the transistor Q34 is to prevent current backflow. When the adapter is unplugged and the super capacitor supplies power, the current will not flow to the adapter end.

[0023] As another embodiment of the present utility model, it further includes a capacitive filter circuit. The capacitive filter circuit includes capacitor C600, capacitor C601, capacitor C602, capacitor C603, capacitor C604 and capacitor C605. One end of capacitor C600, one end of capacitor C601, one end of capacitor C602, one end of capacitor C603, one end of capacitor C604 and one end of capacitor C605 are all connected to the other end of resistor R414, and the other end of capacitor C600, the other end of capacitor C601, the other end of capacitor C602, the other end of capacitor C603, the other end of capacitor C604 and the other end of capacitor C605 are all grounded.

[0024] As another embodiment of the present utility model, the 37th pin of the capacitor chip is connected to one end of resistor R408, the other end of resistor R408 is grounded, one end of resistor R405 is connected to the 37th pin of the capacitor chip, and the other end of resistor R405 is connected to the connection line between the external power supply and the server power supply.

[0025] As another embodiment of the present utility model, the 21st pin of the capacitor chip is connected to the other end of resistor R414, the 22nd pin of the capacitor chip is connected to one end of resistor R414, the 30th pin of the capacitor chip is connected to one end of resistor 403, and the 31st pin of the capacitor chip is connected to the other end of resistor 403.

[0026] As another embodiment of the present utility model, the 16 pins of the capacitor chip are connected to one end of the resistor R418, the other end of the resistor R418 is connected to one end of the resistor R429, one end of the resistor R429 is connected to the source electrode of the transistor Q35, the other end of the resistor R429 is connected to one end of the resistor R430, the other end of the resistor R430 is connected to one end of the resistor R434, the other end of the resistor R434 is grounded, one end of the capacitor C610 is connected to the other end of the resistor R418, the other end of the capacitor C610 is connected to one end of the capacitor C611, one end of the resistor R420 is connected to the other end of the capacitor C610, the other end of the resistor R420 is connected to the 15th pin of the capacitor chip, one end of the capacitor C611 is connected to one end of the resistor R420, the other end of the capacitor C611 is connected to one end of the capacitor C613, one end of the resistor R423 is connected to the other end of the capacitor C611, the other end of the resistor R423 is connected to the 14th pin of the capacitor chip, one end of the capacitor C613 is connected to one end of the resistor R423, the other end of the capacitor C613 is connected to one end of the capacitor C614, one end of the resistor R424 is connected to the other end of the capacitor C613, the other end of the resistor R424 is connected to the 13th pin of the capacitor chip, one end of the capacitor C614 is connected to one end of the resistor R424, the 3rd pin of the capacitor C614 is grounded, the 2nd pin of the capacitor C614 is connected to one end of the resistor R427, the other end of the resistor R427 is connected to the 12th pin of the capacitor chip, and the 6th pin of the capacitor chip is connected to one end of the resistor R434. The function of this part of the circuit is to balance the voltage of the supercapacitor, ensure that the voltages of the four supercapacitors are the same, and thus protect the supercapacitor.

[0027] As another embodiment of the present utility model, the model of the capacitor chip adopts LTC3350EUHF.

[0028] The present utility model provides a server hard disk protection circuit. The main purpose of this design is to prevent the small server from failing to shut down in time when there is an abnormal power failure, resulting in the hard disk suddenly losing power while in the working state, thereby damaging the hard disk. When designing the server, a supercapacitor scheme is added. When the server power supply suddenly cuts off, it switches to supercapacitor power supply on the hardware. At the same time, when the server detects that the input power supply has cut off, it executes protection measures such as shutting down, thereby protecting the hard disk data.

[0029] This circuit utilizes the charging and discharging working principle of the supercapacitor. When the external power supply of the server is normal, it charges the capacitor chip to save the backup power supply. When the external power supply of the server is unstable or loses power, the capacitor chip will release electrical energy to the server, enabling the server to enter the protection mode, thereby protecting the hard disk data of the server. It is mainly divided into two processes: the charging and discharging of the capacitor chip.

[0030] Charging process: When the server power supply is stable, the external power supply will preferentially charge the capacitor chip through the transistor Q36 and the inductor L24. After the capacitor chip is fully charged, it will supply power to the server system. The transistor Q36 and the transistor Q37 form a typical DCDC buck circuit, where the resistor R414 is the current detection resistor. In Figure 1 , the capacitors C587, C588, C590, C591, C592, C594, C597, C598, C600, C601 are used for power filtering, and the other capacitors and resistors are mainly the system configuration of the LTC3350EUHF model chip, which is used to monitor the charging current. The voltage and current of the capacitor chip can be configured through corresponding parameters, and a suitable capacitor chip is selected to ensure that the server can enter the protection mode.

[0031] Discharging process: When the server power supply is unstable, the capacitor chip will discharge the entire server to ensure the stability of the server power supply. There are two discharging modes when the capacitor chip discharges. When the voltage of the capacitor chip is higher than the set voltage, the capacitor chip directly discharges through the transistor Q35; when the voltage of the capacitor chip is lower than the output voltage of 12V set by the resistors R406 and R407, the capacitor chip discharges through the resistor R414, the inductor L24, and the transistor Q36. The selection of the capacitor chip determines the discharging time of the super capacitor to the server, so as to ensure that the server can enter the protection mode and protect the hard disk data from being damaged.

[0032] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A server hard disk protection circuit, characterized in that It includes a capacitor chip, transistor Q35, transistor Q36, transistor Q37, inductor L24 and resistor R414. The gate of transistor Q36 is connected to the 25th pin of the capacitor chip. The drain of transistor Q36 is connected to an external power supply. The gate of transistor Q37 is connected to the 27th pin of the capacitor chip. The drain of transistor Q37 is connected to the source of transistor Q36. One end of inductor L24 is connected to the drain of transistor Q37. The 24th pin of the capacitor chip is connected to the drain of transistor Q37. One end of resistor R414 is connected to the other end of inductor L24. The other end of resistor R414 is connected to the source of transistor Q35. The gate of transistor Q35 is connected to the 20th pin of the capacitor chip. The drain of transistor Q35 is connected to the server power supply.

2. The server hard disk protection circuit according to claim 1, characterized in that When the server power supply is stable, the external power supply charges the capacitor chip through transistor Q36 and inductor L24. After the capacitor chip is fully charged, it supplies power to the server power supply. Transistor Q36 and transistor Q37 form a DCDC buck circuit.

3. The server hard disk protection circuit according to claim 1, characterized in that, When the voltage of the capacitor chip is higher than the set voltage, the capacitor chip discharges through transistor Q35.

4. The server hard disk protection circuit according to claim 1, characterized in that, When the voltage of the capacitor chip is lower than the output voltage set by resistor R406 and resistor R407, the capacitor chip discharges by boosting through resistor R414, inductor L24 and transistor Q36. One end of resistor R407 is connected to the 7th pin of the capacitor chip. The other end of resistor R407 is grounded. One end of resistor R406 is connected to one end of resistor R407. The other end of resistor R406 is connected to the wire connecting the external power supply and the server power supply.

5. The server hard disk protection circuit according to claim 1, wherein It also includes transistor Q34. The gate of transistor Q34 is connected to the 33rd pin of the capacitor chip. The source of transistor Q34 is connected to the external power supply. The drain of transistor Q34 is connected to one end of resistor 403. The other end of resistor 403 is connected to the server power supply.

6. The server hard disk protection circuit according to claim 1, characterized in that It also includes a capacitor filter circuit. The capacitor filter circuit includes capacitor C600, capacitor C601, capacitor C602, capacitor C603, capacitor C604 and capacitor C605. One end of capacitor C600, one end of capacitor C601, one end of capacitor C602, one end of capacitor C603, one end of capacitor C604 and one end of capacitor C605 are all connected to the other end of resistor R414. The other end of capacitor C600, the other end of capacitor C601, the other end of capacitor C602, the other end of capacitor C603, the other end of capacitor C604 and the other end of capacitor C605 are all grounded.

7. The server hard disk protection circuit according to claim 1, characterized in that The 37th pin of the capacitor chip is connected to one end of resistor R408. The other end of resistor R408 is grounded. One end of resistor R405 is connected to the 37th pin of the capacitor chip. The other end of resistor R405 is connected to the wire connecting the external power supply and the server power supply.

8. The server hard disk protection circuit according to claim 5, wherein The 21st pin of the capacitor chip is connected to the other end of resistor R414. The 22nd pin of the capacitor chip is connected to one end of resistor R414. The 30th pin of the capacitor chip is connected to one end of resistor 403. The 31st pin of the capacitor chip is connected to the other end of resistor 403.

9. The server hard disk protection circuit according to claim 1, wherein The 16-pin of the capacitor chip is connected to one end of the resistor R418. The other end of the resistor R418 is connected to one end of the resistor R429. One end of the resistor R429 is connected to the source electrode of the transistor Q35. The other end of the resistor R429 is connected to one end of the resistor R430. The other end of the resistor R430 is connected to one end of the resistor R434. The other end of the resistor R434 is grounded. One end of the capacitor C610 is connected to the other end of the resistor R418. The other end of the capacitor C610 is connected to one end of the capacitor C611. One end of the resistor R420 is connected to the other end of the capacitor C610. The other end of the resistor R420 is connected to the 15-pin of the capacitor chip. One end of the capacitor C611 is connected to one end of the resistor R420. The other end of the capacitor C611 is connected to one end of the capacitor C613. One end of the resistor R423 is connected to the other end of the capacitor C611. The other end of the resistor R423 is connected to the 14-pin of the capacitor chip. One end of the capacitor C613 is connected to one end of the resistor R423. The other end of the capacitor C613 is connected to one end of the capacitor C614. One end of the resistor R424 is connected to the other end of the capacitor C613. The other end of the resistor R424 is connected to the 13-pin of the capacitor chip. One end of the capacitor C614 is connected to one end of the resistor R424. The 3-pin of the capacitor C614 is grounded. The 2-pin of the capacitor C614 is connected to one end of the resistor R427. The other end of the resistor R427 is connected to the 12-pin of the capacitor chip. The 6-pin of the capacitor chip is connected to one end of the resistor R434.

10. The server hard disk protection circuit according to any one of claims 1-9, characterized in that, The model of the capacitor chip is LTC3350EUHF.

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