WO2017181428A1 - Power failure protection circuit of solid state disk and solid state disk with ddr cache - Google Patents
Power failure protection circuit of solid state disk and solid state disk with ddr cache Download PDFInfo
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- WO2017181428A1 WO2017181428A1 PCT/CN2016/080065 CN2016080065W WO2017181428A1 WO 2017181428 A1 WO2017181428 A1 WO 2017181428A1 CN 2016080065 W CN2016080065 W CN 2016080065W WO 2017181428 A1 WO2017181428 A1 WO 2017181428A1
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- solid state
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/16—Protection against loss of memory contents
Definitions
- the invention belongs to the technical field of storage products, and particularly relates to a power failure protection circuit of a solid state hard disk and a solid state hard disk with a DDR cache.
- SSD solid state disk without DDR cache
- solid state disk with DDR cache Ordinary U disk large file read and write performance is uneven, small file random read and write performance is poor; SSD without DDR cache large file read and write performance is good, but small file random read and write performance in general; solid state drive with DDR cache large File read and write performance and small file random read and write performance are very good; but if the hard disk is directly powered off or the hard disk is removed without security removal, the data in the SSD cache with DDR cache will be lost.
- the technical problem to be solved by the present invention is to provide a power-down protection circuit for a solid-state hard disk and a solid-state hard disk with a DDR cache, which aims to solve the problem that data loss occurs when a solid-state hard disk with a DDR cache loses power.
- the present invention provides a power-down protection circuit for a solid-state hard disk, comprising a voltage detecting circuit, a charging circuit, a storage capacitor, and a discharging circuit; wherein the voltage detecting circuit is connected to the discharging circuit, and the storage capacitor and the capacitor Said discharge circuit connection;
- the charging circuit is configured to charge the storage capacitor by using an external power source when the data interface of the solid state hard disk is in an ON state with an external power source;
- the voltage detecting circuit is configured to detect an input voltage of a data interface of the solid state hard disk, and when detecting that the input voltage is lower than a preset value, triggering the discharging circuit to discharge the storage capacitor to enable the solid state hard disk
- the write data operation is performed using the electrical energy released by the storage capacitor.
- the solid state drive is a solid state drive with a DDR cache; and includes a USB solid state drive, a SATA solid state drive, and an enterprise solid state drive.
- the storage capacitor is a tantalum capacitor.
- the preset value is 4.25V.
- the invention also provides a solid state hard disk with a DDR buffer, comprising the above-mentioned power-down protection circuit.
- the present invention has the beneficial effects that the present invention provides a power-down protection circuit for a solid-state hard disk and a solid-state hard disk with a DDR cache.
- the voltage detecting circuit When the voltage of the input solid-state hard disk is lower than a certain value, the voltage detecting circuit The discharge circuit is triggered to enable the storage capacitor to continue to supply power to the solid state drive through the discharge circuit.
- the solid state drive can use the power of the storage capacitor to write the data in the DDR to the NAND. In Flash, avoid data loss.
- adding such a power-down protection circuit to the solid-state hard disk not only ensures the integrity of the stored data, but also does not affect the lightness and portability required by the mobile device.
- FIG. 1 is a power-down protection circuit of a solid state hard disk according to an embodiment of the present invention.
- the main implementation idea of the present invention is: detecting the input voltage through the voltage detecting circuit.
- the voltage detecting circuit triggers the discharging circuit, so that the storage capacitor continues to the solid state through the discharging circuit.
- Hard disk power supply, SSD can use the power of the storage capacitor to write data in DDR to NAND In Flash, avoid data loss.
- the power-down protection circuit is specifically described below:
- a power-down protection circuit for a solid-state hard disk includes a voltage detecting circuit, a charging circuit, a storage capacitor, and a discharging circuit; wherein the voltage detecting circuit is connected to the discharging circuit, and the storage capacitor And connecting to the discharge circuit; the charging circuit is configured to charge the storage capacitor by using an external power source when the data interface of the solid state hard disk is in an external power-on state.
- the solid state drive is a solid state drive with a DDR cache; and includes a USB solid state drive, a SATA solid state drive, an enterprise solid state drive, and the like, which have relatively high data integrity requirements.
- the solid state hard disk mentioned in the embodiment of the present invention is a USB solid state hard disk.
- the charging circuit charges the storage capacitor;
- the storage capacitor mentioned in the embodiment of the present invention is a tantalum capacitor.
- tantalum capacitors can be replaced by supercapacitors or electrolytic capacitors, but supercapacitors and electrolytic capacitors are thicker and cannot be made into ultra-thin, lightweight and removable USB solid-state hard disks; and the stability is not good, so the preference is preferred. Tantalum capacitors.
- the voltage detecting circuit is configured to detect an input voltage of a data interface of the solid state hard disk, and when detecting that the input voltage is lower than a preset value, triggering the discharging circuit to discharge the storage capacitor to enable the solid state hard disk
- the write data operation is performed using the electrical energy released by the storage capacitor.
- the step of performing the write data operation specifically includes: triggering the main control chip, so that the main control chip writes the data in the DDR into the NAND Inside the Flash.
- the USB port of the computer stops supplying power to the USB solid state hard disk, and the voltage drops from 5V to 0V, and the voltage detecting circuit detects that the input voltage falls to the pre- When the value is 4.25V, the discharge circuit will be triggered to work, and the tantalum capacitor will supply power to the USB solid-state hard disk. At the same time, the main control chip will be told to write the data in the DDR to the NAND. Flash to avoid data loss.
- the invention also provides a solid state hard disk with a DDR buffer, which is still shown in FIG. 1; and includes the above-mentioned power-down protection circuit.
- the invention adds the power-down protection circuit and the solid-state hard disk with the DDR cache to the solid-state hard disk, and on the one hand, ensures the integrity of the stored data; on the other hand, it does not affect the lightness and portability required by the mobile device.
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Abstract
A power failure protection circuit of a solid state disk and a solid state disk with a DDR cache, falling within the technical field of storage products. The power failure protection circuit comprises a voltage detection circuit (1), a charging circuit (4), an energy storage capacitor (3) and a discharging circuit (2). The voltage detection circuit (1) is connected to the discharging circuit (2), and the energy storage capacitor (3) is connected to the discharging circuit (2); the charging circuit (4) is used for charging the energy storage capacitor (3) using an external power source when a data interface of a solid state disk is in a state where the data interface is connected to the external power source; and the voltage detection circuit (1) is used for detecting an input voltage of the data interface of the solid state disk, and triggering the discharging circuit (2) to discharge the energy storage capacitor (3) when detecting that the input voltage is lower than a pre-set value, so that the solid state disk uses electric energy released by the energy storage capacitor (3) to execute a write data operation. Accordingly, the integrity of storage data is not only ensured, but also the lightness and portability required for a mobile device is unaffected.
Description
本发明属于存储产品技术领域，尤其涉及一种固态硬盘的掉电保护电路及带DDR缓存的固态硬盘。 The invention belongs to the technical field of storage products, and particularly relates to a power failure protection circuit of a solid state hard disk and a solid state hard disk with a DDR cache.
目前市场上存储设备主要有普通的U盘、不带DDR缓存的固态硬盘和带DDR缓存的固态硬盘。普通U盘大文件读写性能参差不齐，小文件随机读写性能差；不带DDR缓存的固态硬盘大文件读写性能不错，但是小文件随机读写性能一般；带DDR缓存的固态硬盘大文件读写性能和小文件随机读写性能都很不错；但是如果异常断电或者没有安全移除就直接拔掉硬盘时，带DDR缓存的固态硬盘缓存里边的数据就会丢失。
Currently, storage devices on the market mainly include ordinary U disk, solid state disk without DDR cache, and solid state disk with DDR cache. Ordinary U disk large file read and write performance is uneven, small file random read and write performance is poor; SSD without DDR cache large file read and write performance is good, but small file random read and write performance in general; solid state drive with DDR cache large File read and write performance and small file random read and write performance are very good; but if the hard disk is directly powered off or the hard disk is removed without security removal, the data in the SSD cache with DDR cache will be lost.
本发明所要解决的技术问题在于提供一种固态硬盘的掉电保护电路及带DDR缓存的固态硬盘，旨在解决带DDR缓存的固态硬盘在掉电时会导致数据丢失的问题。
The technical problem to be solved by the present invention is to provide a power-down protection circuit for a solid-state hard disk and a solid-state hard disk with a DDR cache, which aims to solve the problem that data loss occurs when a solid-state hard disk with a DDR cache loses power.
本发明提供了一种固态硬盘的掉电保护电路，包括电压检测电路、充电电路、储能电容、放电电路；其中，所述电压检测电路与所述放电电路连接，所述储能电容与所述放电电路连接；The present invention provides a power-down protection circuit for a solid-state hard disk, comprising a voltage detecting circuit, a charging circuit, a storage capacitor, and a discharging circuit; wherein the voltage detecting circuit is connected to the discharging circuit, and the storage capacitor and the capacitor Said discharge circuit connection;
所述充电电路用于在所述固态硬盘的数据接口处于与外部电源接通状态时，利用外部电源给所述储能电容充电；The charging circuit is configured to charge the storage capacitor by using an external power source when the data interface of the solid state hard disk is in an ON state with an external power source;
所述电压检测电路用于检测固态硬盘的数据接口的输入电压，并在检测到所述输入电压低于预设值时，触发所述放电电路对所述储能电容进行放电，以使固态硬盘利用所述储能电容释放的电能执行写数据操作。The voltage detecting circuit is configured to detect an input voltage of a data interface of the solid state hard disk, and when detecting that the input voltage is lower than a preset value, triggering the discharging circuit to discharge the storage capacitor to enable the solid state hard disk The write data operation is performed using the electrical energy released by the storage capacitor.
进一步地，所述固态硬盘为带DDR缓存的固态硬盘；包括USB固态硬盘、SATA固态硬盘、企业级固态硬盘。Further, the solid state drive is a solid state drive with a DDR cache; and includes a USB solid state drive, a SATA solid state drive, and an enterprise solid state drive.
进一步地，所述储能电容为钽电容。Further, the storage capacitor is a tantalum capacitor.
进一步地，所述预设值为4.25V。Further, the preset value is 4.25V.
本发明还提供了一种带DDR缓存的固态硬盘，包括上述掉电保护电路。The invention also provides a solid state hard disk with a DDR buffer, comprising the above-mentioned power-down protection circuit.
本发明与现有技术相比，有益效果在于：本发明提供了一种固态硬盘的掉电保护电路及带DDR缓存的固态硬盘，在输入固态硬盘的电压低于某个值时，电压检测电路会触发放电电路，使储能电容通过放电电路继续给固态硬盘供电，固态硬盘可以利用储能电容的电量把DDR里面的数据写入到NAND
Flash里面，避免数据的丢失。同时，在固态硬盘中加入这种掉电保护电路既保证了储存数据的完整性，又不会影响移动设备要求的轻薄、便携性。Compared with the prior art, the present invention has the beneficial effects that the present invention provides a power-down protection circuit for a solid-state hard disk and a solid-state hard disk with a DDR cache. When the voltage of the input solid-state hard disk is lower than a certain value, the voltage detecting circuit The discharge circuit is triggered to enable the storage capacitor to continue to supply power to the solid state drive through the discharge circuit. The solid state drive can use the power of the storage capacitor to write the data in the DDR to the NAND.
In Flash, avoid data loss. At the same time, adding such a power-down protection circuit to the solid-state hard disk not only ensures the integrity of the stored data, but also does not affect the lightness and portability required by the mobile device.
图1是本发明实施例提供的一种固态硬盘的掉电保护电路。 FIG. 1 is a power-down protection circuit of a solid state hard disk according to an embodiment of the present invention.
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
本发明的主要实现思想为：通过电压检测电路对输入的电压进行检测，在输入固态硬盘的电压低于某个值时，电压检测电路会触发放电电路，使储能电容通过放电电路继续给固态硬盘供电，固态硬盘可以利用储能电容的电量把DDR里面的数据写入到NAND
Flash里面，避免数据的丢失。下面具体介绍这种掉电保护电路：The main implementation idea of the present invention is: detecting the input voltage through the voltage detecting circuit. When the voltage of the input solid state hard disk is lower than a certain value, the voltage detecting circuit triggers the discharging circuit, so that the storage capacitor continues to the solid state through the discharging circuit. Hard disk power supply, SSD can use the power of the storage capacitor to write data in DDR to NAND
In Flash, avoid data loss. The power-down protection circuit is specifically described below:
一种固态硬盘的掉电保护电路，如图1所示，包括电压检测电路、充电电路、储能电容、放电电路；其中，所述电压检测电路与所述放电电路连接，所述储能电容与所述放电电路连接；所述充电电路用于在所述固态硬盘的数据接口处于与外部电源接通状态时，利用外部电源给所述储能电容充电。A power-down protection circuit for a solid-state hard disk, as shown in FIG. 1 , includes a voltage detecting circuit, a charging circuit, a storage capacitor, and a discharging circuit; wherein the voltage detecting circuit is connected to the discharging circuit, and the storage capacitor And connecting to the discharge circuit; the charging circuit is configured to charge the storage capacitor by using an external power source when the data interface of the solid state hard disk is in an external power-on state.
具体地，所述固态硬盘为带DDR缓存的固态硬盘；包括USB固态硬盘、SATA固态硬盘、企业级固态硬盘等对数据完整性要求比较高的产品。本发明实施例中提到的固态硬盘为USB固态硬盘。Specifically, the solid state drive is a solid state drive with a DDR cache; and includes a USB solid state drive, a SATA solid state drive, an enterprise solid state drive, and the like, which have relatively high data integrity requirements. The solid state hard disk mentioned in the embodiment of the present invention is a USB solid state hard disk.
具体地，当USB接口插到电脑USB接口使用时，充电电路会给储能电容充电；本发明实施例中提到的储能电容为钽电容。Specifically, when the USB interface is inserted into the USB interface of the computer, the charging circuit charges the storage capacitor; the storage capacitor mentioned in the embodiment of the present invention is a tantalum capacitor.
理论上，钽电容可以换成超级电容或者电解电容，但是超级电容和电解电容都比较厚，无法做成超薄、轻便的可移动USB固态硬盘；而且稳定性都没有钽电容好，所以优先选择钽电容。In theory, tantalum capacitors can be replaced by supercapacitors or electrolytic capacitors, but supercapacitors and electrolytic capacitors are thicker and cannot be made into ultra-thin, lightweight and removable USB solid-state hard disks; and the stability is not good, so the preference is preferred. Tantalum capacitors.
所述电压检测电路用于检测固态硬盘的数据接口的输入电压，并在检测到所述输入电压低于预设值时，触发所述放电电路对所述储能电容进行放电，以使固态硬盘利用所述储能电容释放的电能执行写数据操作。执行写数据操作的步骤具体为，触发主控芯片，使所述主控芯片把DDR里面的数据写入NAND
Flash里面。The voltage detecting circuit is configured to detect an input voltage of a data interface of the solid state hard disk, and when detecting that the input voltage is lower than a preset value, triggering the discharging circuit to discharge the storage capacitor to enable the solid state hard disk The write data operation is performed using the electrical energy released by the storage capacitor. The step of performing the write data operation specifically includes: triggering the main control chip, so that the main control chip writes the data in the DDR into the NAND
Inside the Flash.
具体地，本发明实施例中，当异常断电或者USB口拔掉时，电脑USB端口会停止给USB固态硬盘供电，电压会从5V掉到0V，电压检测电路检测到输入的电压掉到预设值4.25V时，会触发放电电路工作，由钽电容给USB固态硬盘供电，同时告诉主控芯片把DDR里面的数据写到NAND
Flash,避免数据的丢失。Specifically, in the embodiment of the present invention, when the abnormal power is cut off or the USB port is unplugged, the USB port of the computer stops supplying power to the USB solid state hard disk, and the voltage drops from 5V to 0V, and the voltage detecting circuit detects that the input voltage falls to the pre- When the value is 4.25V, the discharge circuit will be triggered to work, and the tantalum capacitor will supply power to the USB solid-state hard disk. At the same time, the main control chip will be told to write the data in the DDR to the NAND.
Flash to avoid data loss.
本发明还提供了一种带DDR缓存的固态硬盘，仍如图1所示；包括上述掉电保护电路。The invention also provides a solid state hard disk with a DDR buffer, which is still shown in FIG. 1; and includes the above-mentioned power-down protection circuit.
本发明通过在固态硬盘中加入掉电保护电路及带DDR缓存的固态硬盘，一方面，保证了储存数据的完整性；另一方面，不会影响移动设备要求的轻薄、便携性。The invention adds the power-down protection circuit and the solid-state hard disk with the DDR cache to the solid-state hard disk, and on the one hand, ensures the integrity of the stored data; on the other hand, it does not affect the lightness and portability required by the mobile device.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.
Claims (5)
- 一种固态硬盘的掉电保护电路，其特征在于，包括电压检测电路、充电电路、储能电容、放电电路；其中，所述电压检测电路与所述放电电路连接，所述储能电容与所述放电电路连接； A power-down protection circuit for a solid-state hard disk, comprising: a voltage detecting circuit, a charging circuit, a storage capacitor, and a discharging circuit; wherein the voltage detecting circuit is connected to the discharging circuit, and the storage capacitor and the capacitor Said discharge circuit connection;所述充电电路用于在所述固态硬盘的数据接口处于与外部电源接通状态时，利用外部电源给所述储能电容充电；The charging circuit is configured to charge the storage capacitor by using an external power source when the data interface of the solid state hard disk is in an ON state with an external power source;所述电压检测电路用于检测固态硬盘的数据接口的输入电压，并在检测到所述输入电压低于预设值时，触发所述放电电路对所述储能电容进行放电，以使固态硬盘利用所述储能电容释放的电能执行写数据操作。The voltage detecting circuit is configured to detect an input voltage of a data interface of the solid state hard disk, and when detecting that the input voltage is lower than a preset value, triggering the discharging circuit to discharge the storage capacitor to enable the solid state hard disk The write data operation is performed using the electrical energy released by the storage capacitor.
- 如权利要求1所述的掉电保护电路，其特征在于，所述固态硬盘为带DDR缓存的固态硬盘；包括USB固态硬盘、SATA固态硬盘、企业级固态硬盘。The power-down protection circuit of claim 1 , wherein the solid state drive is a solid state drive with a DDR cache; and comprises a USB solid state drive, a SATA solid state drive, and an enterprise solid state drive.
- 如权利要求1所述的掉电保护电路，其特征在于，所述储能电容为钽电容。The power-down protection circuit of claim 1 wherein said storage capacitor is a tantalum capacitor.
- 如权利要求1所述的掉电保护电路，其特征在于，所述预设值为4.25V。The power-down protection circuit of claim 1 wherein said predetermined value is 4.25V.
- 一种带DDR缓存的固态硬盘，其特征在于，包括如权利要求1-4任一项所述的掉电保护电路。A solid state hard disk with a DDR buffer, characterized by comprising the power down protection circuit according to any one of claims 1-4.
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| CN113851180A (en) * | 2021-08-18 | 2021-12-28 | 苏州浪潮智能科技有限公司 | System for detecting SSD (solid State disk) standby power reliability, test fixture and SSD |
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