CN107731260B - A power supply method, system and SSD for SSD - Google Patents

Abstract

This application discloses a power supply method for an SSD, applied to an NVMe-compliant SSD, comprising: when the main power supply is detected to be normal, supplying power to a target circuit through the main power supply; when the main power supply is detected to be abnormal, disconnecting the main power supply and supplying power to the target circuit through a backup power supply; wherein the backup power supply is obtained by combining a secondary power supply with a voltage conversion circuit; wherein the voltage values of the main power supply and the backup power supply are both first voltages, and the voltage value of the secondary power supply is a second voltage. This scheme converts the second voltage of the secondary power supply into a first voltage as a backup voltage. When the main power supply fails, the backup power supply supplies power to the target circuit, allowing the SSD to continue operating and improving system reliability. This application also discloses a power supply system for an SSD and an SSD accordingly.

Description

A power supply method, system and SSD for SSD

technical field

The present invention relates to an NVMe SSD, and in particular, to a power supply method, system and SSD for the SSD.

Background technique

With the continuous maturity of SSD (Solid State Disk, solid state drive) technology and the enhancement of performance, the original SATA interface and the AHCI standard have gradually become a major bottleneck limiting the performance of SSD. Therefore, as early as 2009, led by Intel, including Micron, Dell, Samsung, Marvell, NetAPP, EMC, IDT and other companies developed NVMe (Non-Volatile Memory Express, non-volatile storage standard), the purpose is to establish a new standard for SSD The storage specification standard, it is liberated from the old SATA and AHCI. In 2011, the NVMe standard was officially released. The standard was tailored according to the characteristics of SSDs. The new standard lifted various restrictions imposed by the old standard on SSDs. In 2017, the latest NVMe1.3 was released.

Compared with the AHCI standard, the NVMe standard has the advantages of high IOPS, low latency, low power consumption, and wide drive adaptability. The NVMe standard uses the PCIe bus as the data transmission interface of the SSD. The PCIe (Peripheral Component Interconnect Express, peripheral component interconnect standard) bus is a local parallel bus standard introduced by PCISIG (PCI Special Interest Group, mainly Intel), mainly used in computers and on the motherboard of the server. At present, almost all motherboards have PCIe slots, which are used to connect external devices, such as graphics cards, storage, network cards, sound cards, and data acquisition cards. The latest standard is PCIe 4.0.

Currently, the interfaces that support NVMe SSD, such as M.2 interface or U.2 interface, usually provide three-way power supply, which are +12V, +3.3V and +3.3V_AUX respectively. The power supply of SSD usually uses +12V power supply. A few low-voltage SSDs can use 3.3V power supply, or use +12V and +3.3V to supply power to different modules inside the SSD, while 3.3V_AUX is usually used for some power management logic and Special register power is used to reduce power consumption and reduce system recovery time.

The above solution requires high reliability of the power supply. Once there is a problem with the power supply for the system or the modules in the system, it may cause the SSD to stop working or even be damaged.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a reliable and safe SSD power supply method, system and SSD. Its specific plan is as follows:

A power supply method for an SSD, applied to an NVMe-compliant SSD, including:

When monitoring that the main power supply is normal, supply power to the target loop through the main power supply;

When the abnormality of the main power supply is detected, the main power supply is disconnected, and power is supplied to the target circuit through a backup power supply; wherein, the backup power supply is obtained from the auxiliary power supply in combination with a voltage conversion circuit;

Wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the voltage value of the auxiliary power supply is the second voltage.

Preferably, the power supply method further includes:

When it is detected that both the primary power supply and the secondary power supply are abnormal, the power supply to the target circuit is stopped.

Preferably, the first voltage is 12V, and the second voltage is 3.3V;

Correspondingly, the voltage conversion circuit is a boost circuit.

Correspondingly, the present invention discloses an SSD power supply system, which is applied to an SSD conforming to the NVMe standard, including a main power supply, a backup power supply obtained by combining a secondary power supply and a voltage conversion circuit, a logic circuit and a monitoring circuit, wherein the logic The circuit is used to perform the following actions:

When the monitoring circuit detects that the main power supply is normal, power is supplied to the target circuit through the main power supply;

When the monitoring circuit detects that the main power supply is abnormal, disconnects the main power supply, and supplies power to the target circuit through the backup power supply;

Wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the voltage value of the auxiliary power supply is the second voltage.

Preferably, the logic circuit is also used for:

When the monitoring circuit detects that both the main power supply and the backup power supply are abnormal, it stops supplying power to the target circuit.

Preferably, the first voltage is 12V, and the second voltage is 3.3V;

Correspondingly, the voltage conversion circuit is a boost circuit.

Preferably, the logic circuit specifically includes a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, and a third resistor; wherein,

The drain of the first MOS transistor is connected to the main power supply, the gate of the first MOS transistor is connected to the first output terminal of the monitoring circuit, and the source of the first MOS transistor is connected to the target loop. input;

The drain of the second MOS transistor is connected to the standby power supply, the gate of the second MOS transistor is connected to the second output terminal of the monitoring loop, and the source of the second MOS transistor is connected to the target loop. input;

The first end of the first resistor is connected to the main power supply, and the second end is connected to the first end of the second resistor;

The first end of the second resistor is also connected to the first output end of the monitoring circuit, and the second end is grounded;

The first end of the third resistor is connected to the second output end of the monitoring circuit, and the second end is grounded.

Preferably, the logic circuit further comprises: a first diode and a second diode, wherein:

the source of the first MOS tube is connected to the anode of the first diode;

The source of the second MOS transistor is connected to the anode of the second diode;

The cathode of the first diode and the cathode of the second diode are both connected to the target input terminal.

Preferably, the monitoring circuit is a circuit powered by an independent power supply.

Correspondingly, the present invention also discloses an SSD, including the power supply system of the SSD according to any one of the above.

The invention discloses a power supply method for an SSD, which is applied to an SSD conforming to the NVMe standard. a power supply, which supplies power to the target circuit through a backup power supply; wherein, the backup power supply is obtained by combining a secondary power supply with a voltage conversion circuit; wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the secondary power supply The voltage value of the power supply is the second voltage. The method converts the second voltage of the secondary power supply into the first voltage as the backup voltage, and when the main power supply is abnormal, the backup power supply supplies power to the target circuit, so that the SSD can continue to work, and the reliability of the system is improved.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying 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. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a flowchart of steps of a method for powering an SSD in an embodiment of the present invention;

2 is a structural distribution diagram of a power supply system of an SSD in an embodiment of the present invention;

FIG. 3 is a structural distribution diagram of a specific SSD power supply system in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An embodiment of the present invention discloses a power supply method for an SSD, which is applied to an SSD conforming to the NVMe standard, as shown in FIG. 1 , including:

S1: When monitoring that the main power supply is normal, supply power to the target circuit through the main power supply;

S2: when the abnormality of the main power supply is detected, disconnect the main power supply, and supply power to the target circuit through the backup power supply;

Wherein, the backup power source is obtained from the secondary power source combined with the voltage conversion circuit;

Wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the voltage value of the auxiliary power supply is the second voltage.

It can be understood that the voltage conversion circuit converts the second voltage of the secondary power supply to the first voltage of the backup power supply, and the working voltage of the target circuit is the first voltage, so the supply voltage can be switched between the main power supply and the backup power supply.

Further, the power supply method may also include:

S3: When it is detected that both the primary power supply and the secondary power supply are abnormal, stop supplying power to the target circuit.

It is understandable that stopping the power supply can avoid damage to the SSD due to abnormal voltage.

Generally, the first voltage provided by the PCIe bus is 12V, and the second voltage is 3.3V; correspondingly, the voltage conversion circuit is a boost circuit, and the boost circuit may specifically be a BOOST circuit.

The invention discloses a power supply method for an SSD, which is applied to an SSD conforming to the NVMe standard. a power supply, which supplies power to the target circuit through a backup power supply; wherein, the backup power supply is obtained by combining a secondary power supply with a voltage conversion circuit; wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the secondary power supply The voltage value of the power supply is the second voltage. The method converts the second voltage of the secondary power supply into the first voltage as the backup voltage, and when the main power supply is abnormal, the backup power supply supplies power to the target circuit, so that the SSD can continue to work, and the reliability of the system is improved.

Correspondingly, the present invention discloses a power supply system for SSD, which is applied to an SSD conforming to the NVMe standard, as shown in FIG. Circuit 3 and monitoring circuit 4, wherein the logic circuit 3 is used to perform the following actions:

When the monitoring circuit 4 detects that the main power supply 1 is normal, it supplies power to the target circuit 5 through the main power supply 1;

When the monitoring circuit 4 detects that the main power supply 1 is abnormal, the main power supply 1 is disconnected, and power is supplied to the target circuit 5 through the backup power supply 2;

The voltage values of the main power source 1 and the backup power source 2 are both the first voltage, and the voltage value of the secondary power source 21 is the second voltage.

Further, logic circuits can also be used to:

When the monitoring circuit detects that both the main power supply and the backup power supply are abnormal, the power supply to the target circuit 5 is stopped.

It can be understood that the system converts the second voltage of the secondary power supply to the first voltage as a backup voltage. When the main power supply is abnormal, the backup power supply will supply power to the target circuit, so that the SSD can continue to work, which improves the reliability of the system. sex.

The embodiment of the present invention discloses a specific power supply system of the SSD. Compared with the previous embodiment, this embodiment further describes and optimizes the technical solution. See Figure 3:

Generally, both the main power supply and the secondary power supply are provided by the PCIe bus, wherein the first voltage is 12V, and the second voltage is 3.3V;

Correspondingly, the voltage conversion circuit is a boost circuit, generally a BOOST circuit.

The logic circuit 3 specifically includes a first MOS transistor 31, a second MOS transistor 32, a first resistor 33, a second resistor 34, and a third resistor 35, wherein,

The drain of the first MOS transistor 31 is connected to the main power supply 1, the gate of the first MOS transistor 31 is connected to the first output terminal of the monitoring circuit 4, and the source of the first MOS transistor 31 is connected to the input terminal of the target loop;

The drain of the second MOS transistor 32 is connected to the standby power supply 2, the gate of the second MOS transistor 32 is connected to the second output terminal of the monitoring loop 4, and the source of the second MOS transistor 32 is connected to the input terminal of the target loop;

The first end of the first resistor 33 is connected to the main power supply 1, and the second end is connected to the first end of the second resistor 34;

The first end of the second resistor 34 is also connected to the first output end of the monitoring circuit 4, and the second end is grounded;

The first end of the third resistor 35 is connected to the second output end of the monitoring circuit 4 , and the second end is grounded.

According to the logic circuit 3 formed by connecting the above components, the logic actions mentioned in the previous embodiment can be completed. The MOS transistors in the logic circuit in the logic circuit are all NMOS transistors. The specific principle is that the gate of the first MOS transistor 31 is controlled by the monitoring circuit 4, and the gate voltage is pulled up to +12V through the first resistor 33 and the second resistor 34, that is, the first output terminal of the monitoring circuit 4 has no output. By default, the source and drain of the first MOS transistor are turned on, and the main power supply 1 supplies power to the target loop 5; the gate of the second MOS transistor 32 is pulled down to the bottom through the third resistor 35, that is, the second output terminal of the monitoring circuit 4 has no When outputting, the source and drain of the second MOS transistor are not turned on by default, and the backup power supply 2 does not supply power to the target loop 5 .

Therefore, when the +12V main power supply 1 is normal, the gate of the first MOS transistor 31 is at a high level, the gate of the second MOS transistor 32 is at a low level, and the +12V main power supply 1 supplies power to the system; when the +12V main power supply 1 is faulty, and the +12V backup power supply 2 is normal, the gate of the first MOS transistor 31 is low level, and the gate of the second MOS transistor 32 is high level. At this time, the backup power supply supplies power to the system; At this time, the gates of the two MOS transistors are both low-level, and the two power supplies are disconnected at this time to avoid damage to the SSD due to abnormal voltage.

Further, the logic circuit 3 may further include: a first diode 36 and a second diode 37, wherein:

The source of the first MOS transistor 31 is connected to the anode of the first diode 36;

The source of the second MOS transistor 32 is connected to the anode of the second diode 37;

The cathode of the first diode 36 and the cathode of the second diode 37 are both connected to the target input terminal.

It can be understood that the series diodes are used to prevent current inflow from damaging the power supply system.

Specifically, the target circuit 5 in the figure includes a plurality of DC-DC chips. The 12V voltage of the main power supply 1 or the backup power supply 2 is converted by the DC-DC chip to the voltage required by each module inside the SSD, and then supplies power to the load in the target circuit. .

Specifically, the monitoring circuit is a circuit powered by an independent power supply. Generally, the power supply of the monitoring circuit is +3.3V_AUX, which is provided by the PCIe bus, which ensures that the monitoring circuit can work normally when the main power supply and the auxiliary power supply fail.

Correspondingly, the present invention also discloses an SSD, including the power supply system of the SSD according to any one of the foregoing embodiments.

For the specific details of the SSD, reference may be made to the description of the power supply system of the SSD in the foregoing embodiment.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The power supply method, system and SSD of an SSD provided by the present invention have been introduced in detail above. The principles and implementations of the present invention are described with specific examples in this paper. The method of the invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this description should not be understood to limit the present invention.

Claims (8)

1. a power supply method of SSD, is characterized in that, is applied to the SSD that meets NVMe standard, and described power supply method is realized by logic circuit, comprising: When the monitoring circuit monitors that the main power supply is normal, supply power to the target circuit through the main power supply; When the monitoring circuit detects that the main power supply is abnormal, disconnects the main power supply, and supplies power to the target circuit through a backup power supply; wherein, the backup power supply is obtained by combining the auxiliary power supply with a voltage conversion circuit; Wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the voltage value of the auxiliary power supply is the second voltage; The logic circuit specifically includes a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, a third resistor, a first diode and a second diode; the drain of the first MOS transistor is connected to In the main power supply, the gate of the first MOS transistor is connected to the first output terminal of the monitoring circuit, and the source of the first MOS transistor is connected to the anode of the first diode; the second MOS transistor The drain of the tube is connected to the standby power supply, the gate of the second MOS tube is connected to the second output terminal of the monitoring circuit, and the source of the second MOS tube is connected to the anode of the second diode; The first end of the first resistor is connected to the main power supply, and the second end is connected to the first end of the second resistor; the first end of the second resistor is also connected to the first output end of the monitoring circuit, The second terminal is grounded; the first terminal of the third resistor is connected to the second output terminal of the monitoring circuit, and the second terminal is grounded; the cathode of the first diode and the cathode of the second diode are both connected to the ground. connected to the input of the target loop. 2. The power supply method according to claim 1, further comprising: When it is detected that both the primary power supply and the secondary power supply are abnormal, the power supply to the target circuit is stopped. 3. The power supply method according to claim 1 or 2, characterized in that, The first voltage is 12V, and the second voltage is 3.3V; Correspondingly, the voltage conversion circuit is a boost circuit. 4. A power supply system for SSD, characterized in that, applied to an SSD meeting the NVMe standard, comprising a main power supply, a backup power supply obtained by combining a secondary power supply and a voltage conversion circuit, a logic circuit and a monitoring circuit, wherein the logic circuit Specifically, it includes a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, a third resistor, a first diode and a second diode; the drain of the first MOS transistor is connected to the main power supply , the gate of the first MOS transistor is connected to the first output end of the monitoring circuit, the source of the first MOS transistor is connected to the anode of the first diode; the drain of the second MOS transistor connected to the backup power supply, the gate of the second MOS transistor is connected to the second output terminal of the monitoring circuit, the source of the second MOS transistor is connected to the anode of the second diode; the first The first end of the resistor is connected to the main power supply, the second end is connected to the first end of the second resistor; the first end of the second resistor is also connected to the first output end of the monitoring circuit, and the second end is grounded ; The first end of the third resistor is connected to the second output end of the monitoring circuit, and the second end is grounded; the cathode of the first diode and the cathode of the second diode are connected to the target loop connected to the input; The logic circuit is used to perform the following actions: When the monitoring circuit detects that the main power supply is normal, power is supplied to the target circuit through the main power supply; When the monitoring circuit detects that the main power supply is abnormal, disconnects the main power supply, and supplies power to the target circuit through the backup power supply; Wherein, the voltage values of the main power supply and the backup power supply are both the first voltage, and the voltage value of the auxiliary power supply is the second voltage. 5. The power supply system according to claim 4, wherein the logic circuit is further used for: When the monitoring circuit detects that both the main power supply and the backup power supply are abnormal, it stops supplying power to the target circuit. 6. The power supply system according to claim 5, characterized in that: The first voltage is 12V, and the second voltage is 3.3V; Correspondingly, the voltage conversion circuit is a boost circuit. 7. The power supply system according to any one of claims 4 to 6, wherein the monitoring circuit is a circuit powered by an independent power supply. 8. An SSD, characterized by comprising the power supply system of the SSD according to any one of claims 4 to 7.

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