阅读说明：本技术 一种供电防护装置和服务器 (Power supply protection device and server ) 是由 林天祥 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种供电防护装置和服务器。所述装置包括：防护器件,所述防护器件的输入端与电源连接；电阻分流器,所述电阻分流器的输入端与所述防护器件的输出端连接,电阻分流器的输出端与用电器件电连接；电流检测单元,所述电流检测单元构造为检测流经所述电阻分流器的电流；电压检测单元,所述电压检测单元构造为检测电阻分流器输出端的电压；所述防护器件配置为根据所述电流检测单元和所述电压检测单元确定电源状态信号,并根据所述电源状态信号控制所述防护器件的输出端信号。本发明的方案实现了在原有的防护器件构成的第一阶防护基础上达到第二阶的保护效果,极大的降低了用电器件烧毁的风险,显著地提升了供电保护的效果。(The invention discloses a power supply protection device and a server. The device comprises: the input end of the protection device is connected with a power supply; the input end of the resistor shunt is connected with the output end of the protective device, and the output end of the resistor shunt is electrically connected with the electrical appliance; a current detection unit configured to detect a current flowing through the resistive shunt; a voltage detection unit configured to detect a voltage at an output terminal of the resistive shunt; the protection device is configured to determine a power state signal according to the current detection unit and the voltage detection unit, and control an output end signal of the protection device according to the power state signal. The scheme of the invention realizes the second-order protection effect on the basis of the first-order protection formed by the original protection device, greatly reduces the risk of burning out the electric appliance and obviously improves the power supply protection effect.)

1. A power supply protection device, the device comprising:

the input end of the protection device is connected with a power supply;

the input end of the resistor shunt is connected with the output end of the protection device, and the output end of the resistor shunt is electrically connected with an electrical appliance;

a current detection unit configured to detect a current flowing through the resistive shunt;

a voltage detection unit configured to detect a voltage at an output terminal of the resistive shunt;

the protection device is configured to determine a power state signal according to the current detection unit and the voltage detection unit, and control an output end signal of the protection device according to the power state signal.

2. The apparatus of claim 1, wherein the current detection unit comprises an amplifier and a first comparator and a first reference terminal;

the positive input end of the amplifier is connected with the first voltage output end of the resistor shunt close to the protection device, and the negative input end of the amplifier is connected with the second voltage output end of the resistor shunt close to the electric device;

and the positive input end of the first comparator is connected with the output end of the amplifier, and the negative input end of the first comparator is connected with the first reference end.

3. The apparatus of claim 2, wherein the first reference terminal comprises a first resistor and a second resistor;

the first resistor and the second resistor are connected in series, one end of the first resistor, which is far away from the second resistor, is connected with the power supply, and one end of the second resistor, which is far away from the first resistor, is grounded;

the output end of the amplifier is connected with the positive input end of the first comparator, and the common end of the first resistor and the second resistor is connected with the negative input end of the first comparator.

4. The apparatus of claim 3, wherein the voltage detection unit comprises a second comparator, a third resistor, a fourth resistor, and a second reference terminal;

the third resistor and the fourth resistor are connected in series, one end of the third resistor, which is far away from the fourth resistor, is connected with the output end of the resistor shunt, and one end of the fourth resistor, which is far away from the third resistor, is grounded;

the second reference end is connected with the positive input end of the second comparator, and the common end of the third resistor and the fourth resistor is connected with the negative input end of the second comparator.

5. The apparatus of claim 4, wherein the second reference terminal comprises a fifth resistor and a sixth resistor;

the fifth resistor is connected with the sixth resistor in series, one end, far away from the sixth resistor, of the fifth resistor is connected with the power supply, one end, far away from the fifth resistor, of the sixth resistor is grounded, and the common end of the fifth resistor and the sixth resistor is connected with the positive input end of the second comparator.

6. The device of claim 5, further characterized in that the device further comprises an OR gate;

two input ends of the or gate are respectively connected with the output end of the first comparator and the output end of the second comparator, and the output end of the or gate is connected with a power state indicating pin of the protection device.

7. The apparatus of claim 6, further comprising a diode;

the anode of the diode is connected with the output end of the OR gate, and the cathode of the diode is connected with the power state indicating pin of the protection device.

8. The apparatus of any one of claims 1-7, wherein the protection device is a hot-pluggable chip or an electronic fuse.

9. The apparatus of any of claims 1-7, wherein the power status signal comprises power failure and power normality, and wherein the guard is configured to:

in response to the power state signal being a power failure, cutting off an output end signal;

and responding to the power state signal that the power is normal, and switching on an output end signal.

10. A server, comprising a power supply guard, the power supply guard comprising:

the input end of the protection device is connected with a power supply;

the input end of the resistor shunt is connected with the output end of the protection device, and the output end of the resistor shunt is electrically connected with an electrical appliance;

a current detection unit configured to detect a current flowing through the resistive shunt;

a voltage detection unit configured to detect a voltage at an output terminal of the resistive shunt;

the protection device is configured to determine a power state signal according to the current detection unit and the voltage detection unit, and control an output end signal of the protection device according to the power state signal.

Technical Field

The invention relates to the technical field of power supply protection, in particular to a power supply protection device and a server.

Background

Each board card of the server is provided with a protection mechanism for realizing overvoltage and overcurrent by using a Hot plug chip (Hot-swap) of a power chip or an electronic fuse (E-fuse), if the chip detects abnormality, a Fault signal Fault is sent to a control end of a system, and then a power supply of the system is turned off to avoid burning of the system due to overhigh temperature, however, the service life of each electronic part is different, the protection mechanism of power supply protection can be normally started when products are shipped, and the phenomenon of board burning can occur after the equipment is used for a long time.

For example, fig. 1 shows a schematic diagram of a power supply protection structure of a conventional electrical device, that is, only a hot-swap chip or an electronic fuse is used to isolate a power supply from the electrical device, and since the aging problem of the zero device usually occurs after a long service time, the hot-swap chip or the electronic fuse also has an aging problem, when the hot-swap chip or the electronic fuse is aged or fails, the electrical device located at the rear end of the power supply cannot be protected, and even the electrical device, the board card and the like are burned out when the electrical device or the board card is serious; there is therefore a need for improvements in existing powered guards.

Disclosure of Invention

In view of this, there is a need to provide a power supply protection device and a server, which address the problem that the power supply protection measures in the prior art are too single.

According to a first aspect of the present invention, there is provided a power supply guard, the arrangement comprising:

the input end of the protection device is connected with a power supply;

the input end of the resistor shunt is connected with the output end of the protection device, and the output end of the resistor shunt is electrically connected with an electrical appliance;

a current detection unit configured to detect a current flowing through the resistive shunt;

a voltage detection unit configured to detect a voltage at an output terminal of the resistive shunt;

the protection device is configured to determine a power state signal according to the current detection unit and the voltage detection unit, and control an output end signal of the protection device according to the power state signal.

In some embodiments, the current detection unit includes an amplifier and a first comparator and a first reference terminal;

the positive input end of the amplifier is connected with the first voltage output end of the resistor shunt close to the protection device, and the negative input end of the amplifier is connected with the second voltage output end of the resistor shunt close to the electric device;

and the positive input end of the first comparator is connected with the output end of the amplifier, and the negative input end of the first comparator is connected with the first reference end.

In some embodiments, the first reference terminal comprises a first resistor and a second resistor;

the first resistor and the second resistor are connected in series, one end of the first resistor, which is far away from the second resistor, is connected with the power supply, and one end of the second resistor, which is far away from the first resistor, is grounded;

the output end of the amplifier is connected with the positive input end of the first comparator, and the common end of the first resistor and the second resistor is connected with the negative input end of the first comparator.

In some embodiments, the voltage detection unit includes a second comparator, a third resistor, a fourth resistor, and a second reference terminal;

the third resistor and the fourth resistor are connected in series, one end of the third resistor, which is far away from the fourth resistor, is connected with the output end of the resistor shunt, and one end of the fourth resistor, which is far away from the third resistor, is grounded;

the second reference end is connected with the positive input end of the second comparator, and the common end of the third resistor and the fourth resistor is connected with the negative input end of the second comparator.

In some embodiments, the second reference terminal comprises a fifth resistor and a sixth resistor;

the fifth resistor is connected with the sixth resistor in series, one end, far away from the sixth resistor, of the fifth resistor is connected with the power supply, one end, far away from the fifth resistor, of the sixth resistor is grounded, and the common end of the fifth resistor and the sixth resistor is connected with the positive input end of the second comparator.

In some embodiments, the apparatus further comprises an or gate;

two input ends of the or gate are respectively connected with the output end of the first comparator and the output end of the second comparator, and the output end of the or gate is connected with a power state indicating pin of the protection device.

In some embodiments, the device further comprises a diode;

the anode of the diode is connected with the output end of the OR gate, and the cathode of the diode is connected with the power state indicating pin of the protection device.

In some embodiments, the protection device is a hot-swap chip or an electronic fuse.

In some embodiments, the power status signal includes power failure and power normality, the guard device is configured to:

in response to the power state signal being a power failure, cutting off an output end signal;

and responding to the power state signal that the power is normal, and switching on an output end signal.

According to a second aspect of the present invention, there is provided a server comprising a power supply guard, the power supply guard comprising:

the input end of the protection device is connected with a power supply;

the input end of the resistor shunt is connected with the output end of the protection device, and the output end of the resistor shunt is electrically connected with an electrical appliance;

a current detection unit configured to detect a current flowing through the resistive shunt;

a voltage detection unit configured to detect a voltage at an output terminal of the resistive shunt;

the protection device is configured to determine a power state signal according to the current detection unit and the voltage detection unit, and control an output end signal of the protection device according to the power state signal.

Above-mentioned power supply protector, add resistance shunt through the electrical apparatus of using at protective device and ware rear end, and then utilize current detection device to detect the electric current that flows through resistance shunt, and utilize the voltage detection unit who establishes between resistance shunt and consumer to carry out voltage detection, protective device configures to and confirms the power status signal according to current detection unit and voltage detection unit, and according to power status signal control protective device's output signal, realized reaching the protection effect of second order on the first order protection basis that original protective device constitutes from this, very big reduction the risk of burning out with electrical apparatus, the effect of power supply protection has been promoted remarkably.

In addition, the invention also provides a server, which can also realize the technical effects and is not described again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.

FIG. 1 is a schematic diagram of a power supply protection structure of a conventional electric device;

fig. 2 is a schematic structural diagram of a power supply protection device according to an embodiment of the present invention.

10: a guard device;

20: a resistive shunt;

30: a current detection unit; 31: an amplifier; 32: a first comparator; 33: a first resistor; 34: a second resistor;

40: a voltage detection unit; 41: a second comparator; 42: a third resistor; 43: a fourth resistor; 44: a fifth resistor; 45: a sixth resistor;

50: an electric device;

60: an OR gate;

70: and a diode.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

In one embodiment, referring to fig. 2, the present invention provides a power supply protection device, comprising:

the protection device 10, wherein the input end of the protection device 10 is connected with a power supply; preferably, the protection device 10 is a hot-swap chip or an electronic fuse.

A resistive shunt 20, an input terminal of the resistive shunt 20 is connected to an output terminal of the protection device 10, and an output terminal of the resistive shunt 20 is electrically connected to an electric device 50; preferably, the electric device 50 includes at least one of a hard disk, a fan, a display card, and a chip.

A current detection unit 30, the current detection unit 30 being configured to detect a current flowing through the resistive shunt 20;

a voltage detection unit 40, the voltage detection unit 40 being disposed between the output terminal of the resistive shunt 20 and the electric device 50, the voltage detection unit 40 being configured to detect a voltage at the output terminal of the resistive shunt 20;

wherein the protection device 10 is configured to determine a power status signal according to the current detection unit 30 and the voltage detection unit 40, and control an output signal of the protection device 10 according to the power status signal.

Above-mentioned power supply protector, add resistance shunt through the electrical apparatus of using at protective device and ware rear end, and then utilize current detection device to detect the electric current that flows through resistance shunt, and utilize the voltage detection unit who establishes between resistance shunt and consumer to carry out voltage detection, protective device configures to and confirms the power status signal according to current detection unit and voltage detection unit, and according to power status signal control protective device's output signal, realized reaching the protection effect of second order on the first order protection basis that original protective device constitutes from this, very big reduction the risk of burning out with electrical apparatus, the effect of power supply protection has been promoted remarkably.

In some embodiments, the current detection unit 30 includes an amplifier 31 and a first comparator 32 and a first reference terminal;

a positive input terminal of the amplifier 31 is connected to a first voltage output terminal of the resistive shunt 20 close to the protection device 10, and a negative input terminal of the amplifier 31 is connected to a second voltage output terminal of the resistive shunt 20 close to the power consuming device 50;

a positive input terminal of the first comparator 32 is connected to the output terminal of the amplifier 31, and a negative input terminal of the first comparator 32 is connected to the first reference terminal.

In some embodiments, the first reference terminal comprises a first resistor 33 and a second resistor 34;

the first resistor 33 and the second resistor 34 are connected in series, one end of the first resistor 33, which is far away from the second resistor 34, is connected with the power supply, and one end of the second resistor 34, which is far away from the first resistor 33, is grounded;

an output terminal of the amplifier 31 is connected to a positive input terminal of the first comparator 32, and a common terminal of the first resistor 33 and the second resistor 34 is connected to a negative input terminal of the first comparator 32.

In some embodiments, the voltage detection unit 40 includes a second comparator 41, a third resistor 42, a fourth resistor 43, and a second reference terminal;

the third resistor 42 and the fourth resistor 43 are connected in series, one end of the third resistor 42 away from the fourth resistor 43 is connected to the output end of the resistor shunt 20, and one end of the fourth resistor 43 away from the third resistor 42 is grounded;

the second reference terminal is connected to a positive input terminal of the second comparator 41, and a common terminal of the third resistor 42 and the fourth resistor 43 is connected to a negative input terminal of the second comparator 41.

In some embodiments, the second reference terminal includes a fifth resistor 44 and a sixth resistor 45;

the fifth resistor 44 and the sixth resistor 45 are connected in series, one end of the fifth resistor 44, which is far away from the sixth resistor 45, is connected to the power supply, one end of the sixth resistor 45, which is far away from the fifth resistor 44, is grounded, and a common end of the fifth resistor 44 and the sixth resistor 45 is connected to a positive input end of the second comparator 41.

In some embodiments, the apparatus further comprises an or gate 60;

two input terminals of the or gate 60 are respectively connected to the output terminal of the first comparator 32 and the output terminal of the second comparator 41, and an output terminal of the or gate 60 is connected to a power status indication pin of the protection device 10.

In some embodiments, the apparatus further comprises a diode 70;

the anode of the diode 70 is connected with the output end of the or gate 60, the cathode of the diode 70 is connected with the power state indicating pin of the protection device 10, and the device can be prevented from being damaged by reverse signal flowing of the power state indicating pin of the hot-plug chip or the electronic fuse by the arrangement of the diode.

In some embodiments, the power status signal includes power failure and power normality, and the protection device 10 is configured to:

in response to the power state signal being a power failure, cutting off an output end signal;

and responding to the power state signal that the power is normal, and switching on an output end signal.

In another embodiment, in order to facilitate understanding of the technical solution of the present invention, the following structure shown in fig. 2 illustrates a principle of achieving the protection of the second stage by using the resistive shunt 20, the amplifier 31, the first comparator 32, the second comparator 42, or the or gate 60, and the specific apparatus includes:

a resistor shunt 20 is added to the VOUT terminal of the hot-swap chip or the electronic fuse and then connected to the rear-end electrical device 50, the resistor shunt 20 can detect the flowing current as a formula one, and the flowing current value can be calculated, because the voltage across the resistor shunt is very small, the voltage is amplified by an amplifier 31, which is a conventional IC (Integrated Circuit) in the industry, such as TI (Texas Instruments, but not limited to the manufacturer, and then connected to the "+" of the first comparator 32, and the first resistor 34 and the second resistor 34 are required to perform overcurrent protection for the current value expected to flow.

Vr/R is I formula I;

where Vr is the voltage difference across the resistive shunt and R is the impedance inside the resistive shunt 20.

There are two cases as a result of the first comparator 32: the first case + > -the voltage of the output V +; the second case: + < -its output is at ground level 0; the value of the current flowing through the resistor shunt 20 is the formula one, and normally, a large current is generated due to a short circuit of an output device, at this time, the + terminal of the first comparator 32 becomes large, and when the + terminal is larger than the-terminal, an output is generated, the second comparator 42 is used for overvoltage protection detection, when the voltage at the rear end is abnormal, the voltage division of the third resistor 42 and the fourth resistor 43 will drop, and the voltage will be output when the voltage is lower than the voltage division value of the fifth resistor 44 and the sixth resistor 45, finally the or gate 60 for overvoltage detection and overcurrent detection is connected, the reaction is that the output of Y is generated as long as there is an input at two input terminals a or B of the or gate 60, specifically, referring to the or gate truth table shown in table 1, and finally, the output of the or gate 60 is connected to the Power status indication pin (Fault/Power Good) of the original hot-plug chip or electronic fuse, so as to achieve advanced protection. Wherein Fault is expressed as Power failure, and Power Good is expressed as Power normal, abbreviated as PG.

TABLE 1 OR gate truth table

A (input)	B (input)	Y (output)
			0	0	0
0	1	1
			1	0	1
1	1	1

The device of the invention utilizes the resistor shunt, the amplifier, the first comparator, the second comparator and the OR gate to achieve the protection effect of the second order, the protection chip in the original design has higher reaction speed and can carry out protection rapidly, but if the chip is abnormal due to aging, the protection effect is not provided, at the moment, the system is in a risk, and the device adopts an external circuit to achieve the protection effect of preventing the board from being burned so as to avoid the board burning of the electric device.

In some embodiments, the present invention also provides a server comprising a power supply guard, the power supply guard comprising:

the protection device 10, wherein the input end of the protection device 10 is connected with a power supply;

a resistive shunt 20, an input terminal of the resistive shunt 20 is connected to an output terminal of the protection device 10, and an output terminal of the resistive shunt 20 is electrically connected to an electric device 50;

a current detection unit 30, the current detection unit 30 being configured to detect a current flowing through the resistive shunt 20;

a voltage detection unit 40, the voltage detection unit 40 being configured to detect a voltage at the output terminal of the resistive shunt 20, the voltage detection unit 40 being disposed between the output terminal of the resistive shunt 20 and the power consuming device 50;

the protection device 10 is configured to determine a power status signal according to the current detection unit 30 and the voltage detection unit 40, and control an output signal of the protection device 10 according to the power status signal.

The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.

The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.