WO2017185200A1 - 一种可移动存储设备的接口保护电路及可移动存储设备 - Google Patents

一种可移动存储设备的接口保护电路及可移动存储设备 Download PDF

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Publication number
WO2017185200A1
WO2017185200A1 PCT/CN2016/080119 CN2016080119W WO2017185200A1 WO 2017185200 A1 WO2017185200 A1 WO 2017185200A1 CN 2016080119 W CN2016080119 W CN 2016080119W WO 2017185200 A1 WO2017185200 A1 WO 2017185200A1
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Prior art keywords
storage device
protection circuit
removable storage
interface
overvoltage
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PCT/CN2016/080119
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English (en)
French (fr)
Inventor
楚一兵
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深圳市瑞耐斯技术有限公司
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Priority to PCT/CN2016/080119 priority Critical patent/WO2017185200A1/zh
Publication of WO2017185200A1 publication Critical patent/WO2017185200A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Definitions

  • the invention belongs to the technical field of storage products, and in particular relates to an interface protection circuit and a removable storage device of a removable storage device.
  • the technical problem to be solved by the present invention is to provide an interface protection circuit and a removable storage device of a removable storage device, which are intended to solve the damage of the storage device due to overvoltage or overcurrent or electrostatic discharge during use of the removable storage device. Or the problem of data loss.
  • the present invention provides an interface protection circuit for a removable storage device, including an overvoltage and overcurrent protection circuit, an electrostatic surge protection circuit, a power management circuit, and a main control chip; wherein the overvoltage and overcurrent protection circuit and the a power management circuit is connected, and the static surge protection circuit is connected to the main control chip;
  • the overvoltage and overcurrent protection circuit is configured to control a voltage and a current from an external interface power supply within a preset value range, and disconnect a circuit between the external interface power supply and the power management circuit when a preset value is exceeded;
  • the electrostatic surge protection circuit is configured to introduce static electricity into the removable storage device.
  • the overvoltage and overcurrent protection circuit has no action; when the voltage entering the removable storage device is higher than 6.2V and not higher than 11.6 V, the circuit voltage processed by the overvoltage and overcurrent protection circuit is 5V; when the voltage entering the removable storage device is higher than 11.6V, the overvoltage and overcurrent protection circuit disconnects the external interface power supply and The line between the power management circuits.
  • the overvoltage and overcurrent protection circuit limits the current to 3A.
  • the static electricity includes contact discharge and air discharge; the upper limit of the contact discharge voltage of the lead-in ground is 8 kV, The upper limit of the air discharge voltage that can be introduced into the ground is 15KV.
  • the present invention also provides a removable storage device, including the interface protection circuit of the above removable storage device.
  • the removable storage device is a USB interface removable storage device, a SATA interface removable storage device, or a PCIE interface removable storage device.
  • the present invention has the beneficial effects that the interface protection circuit and the removable storage device of the removable storage device provided by the present invention have an overvoltage and overcurrent protection circuit added to the storage device.
  • the electrostatic surge protection circuit is added to make
  • the main control chip After the signal of the host connected to the storage device passes through the static surge protection circuit, it enters the main control chip to avoid the problem of data loss caused by the failure of the main control chip due to static electricity surge, thus solving the problem of hot plugging or external interface power supply. Stable, it will damage the storage device; it also solves the problem of data loss in the storage device in the case of contact discharge or air discharge, and maximizes the protection of the removable storage device and the data in the device. Safety.
  • FIG. 1 is a schematic diagram of an interface protection circuit of a removable storage device according to an embodiment of the present invention.
  • the main implementation idea of the present invention is: by adding an overvoltage and overcurrent protection circuit and an electrostatic surge protection circuit to the removable storage device, on the one hand, after the power supply coming from the device interface passes the overvoltage and overcurrent protection circuit, the voltage value And the current value is within the normal range, and will not bring unpredictable problems to the storage device; on the other hand, the signal of the host connected to the storage device passes through the static surge protection circuit, and then enters the main control chip to avoid static electricity. The surge caused the master chip to fail, resulting in data loss.
  • a DDR cache chip and a flash memory chip are further included; the main control chip 4 is connected to the DDR cache chip and the flash memory chip (the connection relationship is not shown in the figure).
  • the removable storage device provided by the embodiment of the present invention is a USB interface removable storage device.
  • the overvoltage and overcurrent protection circuit 1 is configured to control the voltage and current from the external interface power supply within a preset range and disconnect the line between the external interface power supply and the power management circuit when the preset value is exceeded.
  • the power supply voltage from the USB interface of the storage device is normally 5V, and when the voltage entering the removable storage device is not higher than 6.2V, the overvoltage protection circuit has no action; when entering the movable
  • the overvoltage protection circuit clamps the voltage at 5V when the voltage of the storage device is higher than 6.2V and not higher than 11.6V; the overvoltage protection when the voltage entering the removable storage device is higher than 11.6V
  • the circuit disconnects the line between the external interface power supply and the power management circuit, preventing the non-standard power supply from entering the USB storage device and avoiding burning the storage device.
  • the current provided by the normal USB3.0 interface is 900 mA.
  • the current may increase.
  • the overcurrent protection circuit limits the current to 3 A, avoiding excessive current. Damage to the USB storage device; at the same time, since the removable USB storage device supports hot plugging, the pulse current is relatively large at the time of plugging and unplugging, and the current is limited after the overcurrent protection circuit 3A, effectively protects USB storage devices.
  • the electrostatic surge protection circuit 2 is configured to introduce static electricity into the removable storage device.
  • the USB host signal passes through the static surge protection circuit 2 and then enters the main control chip 4. If there is static electricity, the static electricity is introduced into the ground to avoid the failure of the main control chip 4 due to the static electricity surge.
  • Electrostatic surge protection circuit 2 according to IEC61000-4-2 Level 4 Standard design, technical parameters: contact discharge 8KV, air discharge 15KV; the upper limit of the contact discharge voltage that can be introduced into the ground is 8kv, and the upper limit of the air discharge voltage that can be introduced into the ground is 15KV.
  • the present invention also provides a removable storage device, including the interface protection circuit of the above removable storage device.
  • the removable storage device includes a USB (Universal Serial) Bus, Universal Serial Bus) interface removable storage device, SATA (Serial Advanced Technology) Attachment, Serial Advanced Technology Attachment) Interface Removable Storage Device, PCIE (Peripheral Component Interface) Express, peripheral high-speed interconnect interface) interface removable storage device.
  • USB Universal Serial
  • USB Universal Serial Bus
  • SATA Serial Advanced Technology
  • Serial Advanced Technology Attachment Serial Advanced Technology Attachment
  • PCIE Peripheral Component Interface
  • peripheral high-speed interconnect interface peripheral high-speed interconnect interface
  • the invention can be applied to high-speed serial interface products including the above-mentioned USB, SATA, PCIE, etc., and the application modes are realized by overvoltage and overcurrent protection of the power supply and electrostatic surge protection of the signal.

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

一种可移动存储设备的接口保护电路，包括过压过流保护电路（1）、静电浪涌防护电路（2）、电源管理电路（3）、主控芯片（4）；其中，所述过压过流保护电路（1）与所述电源管理电路（3）连接，所述静电浪涌防护电路（2）与所述主控芯片（4）连接；所述过压过流保护电路（1）用于控制来自外部接口电源的电压和电流在预设值范围内并在超过预设值时断开外部接口电源与所述电源管理电路（3）之间的线路；所述静电浪涌防护电路（2）用于将进入所述可移动存储设备的静电导入地。所述可移动存储设备的接口保护电路可最大限度的保护可移动存储设备以及设备里面的数据安全。

Description

一种可移动存储设备的接口保护电路及可移动存储设备 技术领域
本发明属于存储产品技术领域，尤其涉及一种可移动存储设备的接口保护电路及可移动存储设备。
 背景技术
目前市场上的存储设备大部分没有接口保护电路，只有很少一部分在输入电源上加一个保险丝，但是这样的保护非常弱，明显不够；特别是现在的存储设备速度都非常快，频率比较高，热插拔的话瞬间浪涌比较大，或者在存储设备插入的主机端电源不稳定的情况下也会造成瞬间浪涌比较大，如果不进行保护，有可能导致存储设备损坏。而且作为移动便携设备，经常移动工作，人体直接接触会给存储设备带来很大的静电放电（ESD）威胁；如果没有做好电路保护，有可能会导致存储设备里的数据丢失。
 技术问题
本发明所要解决的技术问题在于提供一种可移动存储设备的接口保护电路及可移动存储设备，旨在解决可移动存储设备在使用过程中，由于过压过流或静电放电而导致存储设备损坏或数据丢失的问题。
 技术解决方案
本发明提供了一种可移动存储设备的接口保护电路，包括过压过流保护电路、静电浪涌防护电路、电源管理电路、主控芯片；其中，所述过压过流保护电路与所述电源管理电路连接，所述静电浪涌防护电路与所述主控芯片连接；
所述过压过流保护电路用于控制来自外部接口电源的电压和电流在预设值范围内，并在超过预设值时断开外部接口电源与所述电源管理电路之间的线路；
所述静电浪涌防护电路用于将进入所述可移动存储设备的静电导入地。
进一步地，当进入所述可移动存储设备的电压不高于6.2V时，所述过压过流保护电路无动作；当进入所述可移动存储设备的电压高于6.2V而不高于11.6V时，经所述过压过流保护电路处理后的电路电压为5V；当进入所述可移动存储设备的电压高于11.6V时，所述过压过流保护电路断开外部接口电源与所述电源管理电路之间的线路。
进一步地，当进入所述可移动存储设备的电流大于3A时，所述过压过流保护电路将电流限定为3A。
进一步地，所述静电包括接触放电和空气放电；可导入地的接触放电电压上限值为8kv, 可导入地的空气放电电压上限值为15KV。
本发明还提供了一种可移动存储设备，包括上述可移动存储设备的接口保护电路。
进一步地，所述可移动存储设备为USB接口可移动存储设备、SATA接口可移动存储设备或PCIE接口可移动存储设备。
 有益效果
本发明与现有技术相比，有益效果在于：本发明提供的一种可移动存储设备的接口保护电路及可移动存储设备，在存储设备中一方面增加了过压过流保护电路，使从设备接口进来的电源通过过压过流保护电路后，电压值和电流值在正常范围内，不会对存储设备带来不可预测的问题；另一方面还增加了静电浪涌防护电路，使得与存储设备连接的主机的信号通过静电浪涌防护电路后，再进入到主控芯片，避免因为静电浪涌导致主控芯片失效从而导致数据丢失的问题，从而解决了热插拔或外部接口电源不稳定的情况下，会损坏存储设备的问题；同时也解决了在接触放电或空气放电的情况下，会导致存储设备里数据丢失的问题，最大限度的保护了可移动存储设备以及设备里面的数据安全。
 附图说明
图1是本发明实施例提供的可移动存储设备的接口保护电路的示意图。
本发明的实施方式
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。
本发明的主要实现思想为：通过在可移动存储设备中加入过压过流保护电路和静电浪涌防护电路，一方面，使从设备接口进来的电源通过过压过电流保护电路后，电压值和电流值在正常范围内，不会对存储设备带来不可预测的问题；另一方面，与存储设备连接的主机的信号通过静电浪涌防护电路后，再进入到主控芯片，避免因为静电浪涌导致主控芯片失效从而导致数据丢失的问题。
下面具体介绍这种可移动存储设备的接口保护电路，如图1所示：
所述接口保护电路包括过压过流保护电路1、静电浪涌防护电路2、电源管理电路3、主控芯片4；其中，所述过压过流保护电路1与所述电源管理电路3连接，所述电源管理电路3与所述主控芯片4连接，所述静电浪涌防护电路2与所述主控芯片4连接。
进一步地，还包括DDR缓存芯片、闪存芯片；所述主控芯片4与所述DDR缓存芯片和所述闪存芯片连接（图中未示出它们的连接关系）。
本发明实施例提供的可移动存储设备为USB接口可移动存储设备。
所述过压过流保护电路1用于控制来自外部接口电源的电压和电流在预设值范围内并在超过预设值时断开外部接口电源与所述电源管理电路之间的线路。
具体地，正常情况下从存储设备USB接口进来的电源电压是5V，当进入所述可移动存储设备的电压不高于6.2V时，所述过压保护电路无动作；当进入所述可移动存储设备的电压高于6.2V而不高于11.6V时，所述过压保护电路将电压钳位在5V；当进入所述可移动存储设备的电压高于11.6V时，所述过压保护电路会断开外部接口电源与所述电源管理电路之间的线路，阻止不规范电源进入USB存储设备，避免烧毁存储设备。
具体地，正常的USB3.0接口提供的电流是900mA，当电源出现异常时电流可能会增大，当USB接口输入电流大于3A时，过流保护电路会限定电流为3A，避免过大电流对USB存储设备的损坏；同时，由于可移动USB存储设备支持热拔插，拔插瞬间脉冲电流比较大，经过过流保护电路后电流被限定到了 3A，有效保护了USB存储设备。
所述静电浪涌防护电路2用于将进入所述可移动存储设备的静电导入地。
具体地，USB主机信号通过静电浪涌防护电路2再进到主控芯片4，若有静电会将静电导入地，避免因为静电浪涌导致主控芯片4失效。
静电浪涌防护电路2按 IEC61000-4-2 Level 4 标准设计，技术参数：接触放电8KV，空气放电15KV；即可导入地的接触放电电压上限值为8kv, 可导入地的空气放电电压上限值为15KV。
本发明还提供了一种可移动存储设备，包括上述可移动存储设备的接口保护电路。
所述可移动存储设备包括USB（Universal Serial Bus，通用串行总线）接口可移动存储设备、SATA（Serial Advanced Technology Attachment，串行高级技术附件）接口可移动存储设备、PCIE（Peripheral Component Interface Express，外围设备高速互联接口）接口可移动存储设备。
本发明可以运用在包括上述USB、SATA、PCIE等高速串行接口产品上面，应用方式都是通过对电源的过压过流保护和对信号的静电浪涌保护来实现的。
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。

Claims (6)

  1. 一种可移动存储设备的接口保护电路，其特征在于，包括过压过流保护电路、静电浪涌防护电路、电源管理电路、主控芯片；其中，所述过压过流保护电路与所述电源管理电路连接，所述静电浪涌防护电路与所述主控芯片连接；
    所述过压过流保护电路用于控制来自外部接口电源的电压和电流在预设值范围内，并在超过预设值时断开外部接口电源与所述电源管理电路之间的线路；
    所述静电浪涌防护电路用于将进入所述可移动存储设备的静电导入地。
  2. 如权利要求1所述的接口保护电路，其特征在于，当进入所述可移动存储设备的电压不高于6.2V时，所述过压过流保护电路无动作；当进入所述可移动存储设备的电压高于6.2V而不高于11.6V时，经所述过压过流保护电路处理后的电路电压为5V；当进入所述可移动存储设备的电压高于11.6V时，所述过压过流保护电路断开外部接口电源与所述电源管理电路之间的线路。
  3. 如权利要求1所述的接口保护电路，其特征在于，当进入所述可移动存储设备的电流大于3A时，所述过压过流保护电路将电流限定为3A。
  4. 如权利要求1所述的接口保护电路，其特征在于，所述静电包括接触放电和空气放电；可导入地的接触放电电压上限值为8kv, 可导入地的空气放电电压上限值为15KV。
  5. 一种可移动存储设备，其特征在于，包括如权利要求1-4任一项所述的可移动存储设备的接口保护电路。
  6. 如权利要求5所述的可移动存储设备，其特征在于，所述可移动存储设备为USB接口可移动存储设备、SATA接口可移动存储设备或PCIE接口可移动存储设备。
PCT/CN2016/080119 2016-04-25 2016-04-25 一种可移动存储设备的接口保护电路及可移动存储设备 WO2017185200A1 (zh)

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CN114389246A (zh) * 2022-01-06 2022-04-22 合肥联宝信息技术有限公司 一种降低浪涌电压的方法和供电设备
CN114720748A (zh) * 2022-04-12 2022-07-08 上海晶岳电子有限公司 一种浪涌电流防护测试方法、电子设备、存储介质和系统

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