Hard disk hot plug protection circuit and protection device
By designing a hot-swap protection circuit for hard disks, and using the coordination of the main control module, power management module, hard disk interface module, electrostatic suppression module and current limiting module, the problem of inrush current during hot-swap removal of SATA hard disks is solved, and the service life of the hard disk is extended.
Patent Information
- Application Number
- CN202323661378.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2033-12-29
AI Technical Summary
When SATA hard disk is hot, it is prone to inrush current, causing damage to the hard disk and reducing its service life.
A hard disk hot-swap protection circuit is designed, including the main control module, power management module, hard disk interface module, electrostatic suppression module and current limiting module. Through the cooperation of these modules, the hard disk insertion and voltage output timing are detected to eliminate surge shock current.
It effectively avoids the inrush current of the SATA hard disk when hot-plugging is performed, and extends the service life of the hard disk.
Smart Images
Figure CN222620681U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hard disks, in particular to a hard disk hot-plug protection circuit and a protection device. Background Art
[0002] SATA hard disk mainly refers to hard disk storage that uses SATA interface and can be plugged in or unplugged at any time. It is compact and easy to carry and can transfer data with the system at a high speed. SATA hard disk has the characteristics of small size and large capacity. As a convenient medium for information exchange, it has been widely used today.
[0003] In the prior art, SATA hard disks need to be frequently plugged in and out. When hot plugging, SATA hard disks are prone to surge current, which causes damage to the hard disk and reduces the service life of the SATA hard disk. Therefore, inventing a reliable and effective hard disk hot plug protection circuit and protection device is an urgent problem to be solved by technicians in this field. Utility Model Content
[0004] The purpose of the present application is to provide a hard disk hot-plug protection circuit and a protection device. In this solution, the surge current generated when the SATA hard disk is hot-plugged can be effectively avoided, thereby extending the service life of the SATA hard disk.
[0005] In order to solve the above technical problems, the present application provides a hard disk hot-swap protection circuit, including a main control module, a power management module, a hard disk interface module, an electrostatic suppression module and a current limiting module;
[0006] The power management module is electrically connected to the main control module, the hard disk interface module, the electrostatic suppression module and the current limiting module respectively;
[0007] The hard disk interface module is electrically connected to the electrostatic suppression module and the current limiting module respectively, the electrostatic suppression module is electrically connected to the main control module, and the current limiting module is electrically connected to the main control module.
[0008] Preferably, the current limiting module includes a current limiting control unit, a charging switch unit and a power output unit;
[0009] The charging switch unit is electrically connected to the hard disk interface module and the current limiting control unit respectively, the current limiting control unit is electrically connected to the power management module and the power output unit respectively, and the power output unit is electrically connected to the hard disk interface module.
[0010] Preferably, the current limiting module further includes a voltage dividing unit;
[0011] The voltage dividing unit is electrically connected to the main control module and the current limiting control unit respectively.
[0012] Preferably, the current limiting unit further includes an electrostatic protection unit;
[0013] The electrostatic protection unit is electrically connected to the charging switch unit and the hard disk interface module respectively.
[0014] Preferably, the charging switch unit includes a MOS tube, a first diode, a first resistor and a first capacitor;
[0015] The gate of the MOS tube is electrically connected to the hard disk interface module, the drain of the MOS tube is electrically connected to the first end of the first resistor, the anode of the first diode, the first end of the first capacitor and the current limiting control unit respectively, the source of the MOS tube is grounded, the cathode of the first diode is electrically connected to the main control module, the second end of the first resistor is electrically connected to the power management module, and the second end of the first capacitor is grounded.
[0016] Preferably, the power output unit includes a second capacitor and a third capacitor;
[0017] The first end of the second capacitor is electrically connected to the current limiting control unit, the first end of the third capacitor and the hard disk interface module respectively, the second end of the second capacitor is grounded, and the second end of the third capacitor is grounded.
[0018] Preferably, the voltage dividing unit includes a second resistor and a third resistor;
[0019] The first end of the second resistor is electrically connected to the main control module, the second end of the second resistor is electrically connected to the first end of the first resistor, the first end of the third resistor and the cathode of the first diode respectively, and the second end of the third resistor is electrically connected to the power management module.
[0020] Preferably, the hard disk interface module includes an input signal processing unit and a hard disk interface unit;
[0021] The input signal processing unit is electrically connected to the SATA hard disk, and the hard disk interface unit is electrically connected to the input signal processing unit, the electrostatic suppression module and the current limiting module respectively.
[0022] Preferably, the electrostatic protection unit comprises an electrostatic diode;
[0023] The first end of the electrostatic diode is electrically connected to the hard disk rack interface module and the current limiting control unit respectively, and the second end of the electrostatic diode is grounded.
[0024] In order to solve the above technical problems, the present application provides a hard disk hot-swap protection device, including the above-mentioned hard disk hot-swap protection circuit.
[0025] The utility model discloses a hard disk hot-swap protection circuit and a protection device with the following beneficial effects. The utility model discloses a hard disk hot-swap protection circuit including: a main control module, a power management module, a hard disk interface module, an electrostatic suppression module and a current limiting module; the power management module is electrically connected to the main control module, the hard disk interface module, the electrostatic suppression module and the current limiting module respectively; the hard disk interface module is electrically connected to the electrostatic suppression module and the current limiting module respectively, the electrostatic suppression module is electrically connected to the main control module, and the current limiting module is electrically connected to the main control module. Therefore, the utility model can effectively avoid the surge current when the SATA hard disk is hot-swapped, and prolong the service life of the SATA hard disk. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:
[0027] Figure 1 It is a principle block diagram of a hard disk hot-swap protection circuit of a preferred embodiment of the utility model;
[0028] Figure 2 It is a principle block diagram of a hard disk hot-swap protection circuit of a preferred embodiment of the utility model;
[0029] Figure 3 This is a circuit schematic diagram of a current limiting module of a hard disk hot-swap protection circuit in a preferred embodiment of the utility model;
[0030] Figure 4 It is a circuit schematic diagram of a hard disk interface module of a hard disk hot-swap protection circuit of a preferred embodiment of the utility model;
[0031] Figure 5 The utility model is a circuit schematic diagram of an electrostatic suppression module of a hard disk hot-swap protection circuit according to a preferred embodiment of the utility model. DETAILED DESCRIPTION
[0032] The core of the present application is to provide a hard disk hot-plug protection circuit and a protection device. In this solution, the surge current generated when the SATA hard disk is hot-plugged can be effectively avoided, thereby extending the service life of the SATA hard disk.
[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0034] See also Figure 1 , Figure 1 A structural schematic diagram of a hard disk hot-swap protection circuit provided in the present application includes a main control module 1, a power management module 2, a hard disk interface module 3, an electrostatic suppression module 4 and a current limiting module 5;
[0035] The power management module 2 is electrically connected to the main control module 1, the hard disk interface module 3, the electrostatic suppression module 4 and the current limiting module 5 respectively;
[0036] The hard disk interface module 3 is electrically connected to the electrostatic suppression module 4 and the current limiting module 5 respectively. The electrostatic suppression module 4 is electrically connected to the main control module 1 , and the current limiting module 5 is electrically connected to the main control module 1 .
[0037] In the prior art, SATA hard disks need to be frequently plugged in and out, and surge current is prone to occur during hot plugging of SATA hard disks, which may damage the hard disks and reduce the service life of the SATA hard disks.
[0038] In view of the above shortcomings, in the present application, the main control module 1, the power management module 2, the hard disk interface module 3, the electrostatic suppression module 4 and the current limiting module 5 are coordinated to achieve reliable suppression of surge current during hot plugging.
[0039] Specifically, the main control module 1 is configured as a microcontroller unit (MCU), also known as a single chip microcomputer or a single chip microcomputer, which appropriately reduces the frequency and specifications of the central processing unit (CPU), and integrates peripheral interfaces such as memory, timer, USB, A / D conversion, UART, PLC, DMA, and even LCD drive circuits on a single chip to form a chip-level computer. In this embodiment, the chip model of the main control module 1 is not specifically limited.
[0040] Specifically, in this embodiment, the power management module 2 is used to provide rated voltage output, and the main control module 1 is used to read the content of the external SATA hard disk.
[0041] Specifically, in this embodiment, the hard disk interface module 3 is used to connect to an external SATA hard disk, the electrostatic suppression module 4 is used to implement electrostatic protection when the SATA hard disk is inserted, and the current limiting module 5 is used to buffer the impact current generated at the moment of insertion of the SATA hard disk, to prevent the impact current from damaging the hard disk and to extend the service life of the SATA hard disk.
[0042] In summary, the present application provides a hard disk hot-swap protection circuit, which includes a main control module 1, a power management module 2, a hard disk interface module 3, an electrostatic suppression module 4 and a current limiting module 5; the power management module 2 is electrically connected to the main control module 1, the hard disk interface module 3, the electrostatic suppression module 4 and the current limiting module 5 respectively; the hard disk interface module 3 is electrically connected to the electrostatic suppression module 4 and the current limiting module 5 respectively, the electrostatic suppression module 4 is electrically connected to the main control module 1, and the current limiting module 5 is electrically connected to the main control module 1. The present application detects the insertion of the hard disk, controls the voltage output timing of the hard disk, eliminates the surge impact current, and avoids damage to the hard disk. Therefore, the utility model can effectively avoid the surge current that occurs when the SATA hard disk is hot-plugged, and prolong the service life of the SATA hard disk.
[0043] Based on the above embodiments:
[0044] Please refer to Figure 2 , Figure 2 A schematic diagram of a hard disk hot-swap protection circuit provided in this application.
[0045] As a preferred embodiment, the current limiting module 5 includes a current limiting control unit 51, a charging switch unit 52 and a power output unit 53;
[0046] The charging switch unit 52 is electrically connected to the hard disk interface module 3 and the current limiting control unit 51 respectively. The current limiting control unit 51 is electrically connected to the power management module 2 and the power output unit 53 respectively. The power output unit 53 is electrically connected to the hard disk interface module 3 .
[0047] Specifically, in this embodiment, when an external SATA hard disk is inserted into the hard disk interface module 3, the charging switch unit 52 performs a level jump. After the charging switch unit 52 is charged internally, the current limiting control unit 51 controls the power output unit 53 to output voltage to the SATA hard disk according to the conduction signal of the switch tube, thereby achieving the purpose of buffering the impact current.
[0048] As a preferred embodiment, the current limiting module 5 further includes a voltage dividing unit 54;
[0049] The voltage dividing unit 54 is electrically connected to the main control module 1 and the current limiting control unit 51 respectively.
[0050] Specifically, in this embodiment, the voltage dividing unit 54 is connected to the main control module 1 , and the main control module 1 is used to control the level of the output level signal to control the EN enable pin of the current limiting control unit 51 .
[0051] As a preferred embodiment, the current limiting unit further includes an electrostatic protection unit 55;
[0052] The electrostatic protection unit 55 is electrically connected to the charging switch unit 52 and the hard disk interface module 3 respectively.
[0053] Specifically, in this embodiment, the electrostatic protection unit 55 is used to suppress electrostatic discharge when the current limiting control unit 51 is working.
[0054] Please refer to Figure 3 , Figure 3 A circuit schematic diagram of a current limiting module provided in this application.
[0055] As a preferred embodiment, the charging switch unit includes a MOS tube Q1, a first diode D1, a first resistor R6 and a first capacitor C4;
[0056] The gate of the MOS tube Q1 is electrically connected to the hard disk interface module, the drain of the MOS tube Q1 is electrically connected to the first end of the first resistor R6, the anode of the first diode D1, the first end of the first capacitor C4 and the current limiting control unit 51 respectively, the source of the MOS tube Q1 is grounded, the cathode of the first diode D1 is electrically connected to the main control module 1, the second end of the first resistor R6 is electrically connected to the power management module 2, and the second end of the first capacitor C4 is grounded.
[0057] Specifically, in this embodiment, when the external SATA hard disk is inserted into the hard disk interface module 3, the HDD1_NC pin changes from a high level to a low level, the HDD1_NC pin is pulled low, the MOS tube Q1 is turned off, and the RC charging circuit composed of the first resistor R6 and the first capacitor C4 starts to charge. When the first capacitor C4 is fully charged, the current limiting control unit 51 is turned on to control the output pin to output the corresponding supply voltage.
[0058] As a preferred embodiment, the power output unit includes a second capacitor CE8 and a third capacitor C2;
[0059] The first end of the second capacitor CE8 is electrically connected to the current limiting control unit 51 , the first end of the third capacitor C2 and the hard disk interface module 3 , respectively. The second end of the second capacitor C2 is grounded. The second end of the third capacitor CE8 is grounded.
[0060] Specifically, in this embodiment, the second capacitor CE8 and the third capacitor C2 are filter capacitors.
[0061] As a preferred embodiment, the voltage dividing unit includes a second resistor R11 and a third resistor R1;
[0062] The first end of the second resistor R11 is electrically connected to the main control module, the second end of the second resistor R1 is electrically connected to the first end of the first resistor R6, the first end of the third resistor R1 and the cathode of the first diode D1, and the second end of the third resistor R1 is electrically connected to the power management module 2.
[0063] Specifically, in this embodiment, the third resistor R1 is not on by default. When the second resistor R11 is on, the main control module 1 controls the EN enable pin; when the third resistor R1 is on and the second resistor R11 is not on, the power management module 2 controls the EN enable pin of U1.
[0064] As a preferred embodiment, the hard disk interface module 3 includes an input signal processing unit 31 and a hard disk interface unit 32;
[0065] The input signal processing unit 31 is electrically connected to the SATA hard disk, and the hard disk interface unit 32 is electrically connected to the input signal processing unit 31 , the electrostatic suppression module 4 , and the current limiting module 5 , respectively.
[0066] Specifically, the input signal processing unit 31 is used to perform signal input processing on the pins connected to the external SATA hard disk to ensure the reliability of the connection.
[0067] As a preferred embodiment, the electrostatic protection unit 55 includes an electrostatic diode ESD1;
[0068] A first end of the electrostatic diode ESD1 is electrically connected to the hard disk rack interface module and the current limiting control unit 51 respectively, and a second end of the electrostatic diode ESD1 is grounded.
[0069] Please refer to Figure 4 , Figure 4 A circuit schematic diagram of a hard disk interface module provided in this application.
[0070] Please refer to Figure 5 , Figure 5 A circuit schematic diagram of an electrostatic suppression module provided in this application.
[0071] Specifically, in this embodiment, the chip model of the electrostatic suppression module is set to CESD2510UC5VU. In another preferred embodiment, the chip model of the electrostatic suppression module is not specifically limited.
[0072] The present application also provides a hard disk hot-swap protection device, including a hard disk hot-swap protection circuit.
[0073] For an introduction to a hard disk hot-swap protection circuit provided in the present application, please refer to the above-mentioned embodiment, and the present application will not go into details here.
[0074] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0075] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be 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 present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A hard disk hot-swap protection circuit, characterized in that: It includes a main control module, a power management module, a hard disk interface module, an electrostatic suppression module and a current limiting module; The power management module is electrically connected to the main control module, the hard disk interface module, the electrostatic suppression module and the current limiting module respectively; The hard disk interface module is electrically connected to the electrostatic suppression module and the current limiting module respectively, the electrostatic suppression module is electrically connected to the main control module, and the current limiting module is electrically connected to the main control module.
2. A hard disk hot-swap protection circuit according to claim 1, characterized in that: The current limiting module includes a current limiting control unit, a charging switch unit and a power output unit; The charging switch unit is electrically connected to the hard disk interface module and the current limiting control unit respectively, the current limiting control unit is electrically connected to the power management module and the power output unit respectively, and the power output unit is electrically connected to the hard disk interface module.
3. A hard disk hot-swap protection circuit according to claim 2, characterized in that: The current limiting module also includes a voltage dividing unit; The voltage dividing unit is electrically connected to the main control module and the current limiting control unit respectively.
4. A hard disk hot-swap protection circuit according to claim 2, characterized in that: The current limiting unit also includes an electrostatic protection unit; The electrostatic protection unit is electrically connected to the charging switch unit and the hard disk interface module respectively.
5. A hard disk hot-swap protection circuit according to claim 3, characterized in that: The charging switch unit includes a MOS tube, a first diode, a first resistor and a first capacitor; The gate of the MOS tube is electrically connected to the hard disk interface module, the drain of the MOS tube is electrically connected to the first end of the first resistor, the anode of the first diode, the first end of the first capacitor and the current limiting control unit respectively, the source of the MOS tube is grounded, the cathode of the first diode is electrically connected to the main control module, the second end of the first resistor is electrically connected to the power management module, and the second end of the first capacitor is grounded.
6. A hard disk hot-swap protection circuit according to claim 2, characterized in that: The power output unit includes a second capacitor and a third capacitor; The first end of the second capacitor is electrically connected to the current limiting control unit, the first end of the third capacitor and the hard disk interface module respectively, the second end of the second capacitor is grounded, and the second end of the third capacitor is grounded.
7. A hard disk hot-swap protection circuit according to claim 5, characterized in that: The voltage dividing unit includes a second resistor and a third resistor; The first end of the second resistor is electrically connected to the main control module, the second end of the second resistor is electrically connected to the first end of the first resistor, the first end of the third resistor and the cathode of the first diode respectively, and the second end of the third resistor is electrically connected to the power management module.
8. The hard disk hot-swap protection circuit according to claim 1, characterized in that: The hard disk interface module includes an input signal processing unit and a hard disk interface unit; The input signal processing unit is electrically connected to the SATA hard disk, and the hard disk interface unit is electrically connected to the input signal processing unit, the electrostatic suppression module and the current limiting module respectively.
9. A hard disk hot-swap protection circuit according to claim 4, characterized in that: The electrostatic protection unit includes an electrostatic diode; The first end of the electrostatic diode is electrically connected to the hard disk rack interface module and the current limiting control unit respectively, and the second end of the electrostatic diode is grounded.
10. A hard disk hot-swap protection device, characterized in that: A hard disk hot-swap protection circuit comprising any one of claims 1 to 9.