CN111313359B - Server hot plug circuit short-circuit protection auxiliary device - Google Patents
Server hot plug circuit short-circuit protection auxiliary device Download PDFInfo
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- CN111313359B CN111313359B CN202010094734.6A CN202010094734A CN111313359B CN 111313359 B CN111313359 B CN 111313359B CN 202010094734 A CN202010094734 A CN 202010094734A CN 111313359 B CN111313359 B CN 111313359B
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- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 239000013589 supplement Substances 0.000 abstract description 2
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- 238000006467 substitution reaction Methods 0.000 description 3
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention provides a server hot plug circuit short circuit protection auxiliary device, the device includes: the circuit comprises a voltage detection circuit, a self-locking voltage comparator and a level control circuit, wherein the voltage detection circuit detects a line between a power output end of a P12V _ PSU and an input end of a branch protection circuit; the output end of the voltage detection circuit is connected with the input end of the self-locking voltage comparator; the output end of the self-locking voltage comparator is connected with the input end of the level control circuit; the output end of the level control circuit is connected with a PSON control pin of a P12_ PSU power supply. The invention supplements the original hot plug protection circuit, and when the short circuit fault of the branch circuit is detected, the power supply at the PSU end is quickly closed, thereby avoiding the high-temperature burning risk caused by the short circuit/overcurrent after the current protection circuit is invalid.
Description
Technical Field
The invention belongs to the technical field of servers, and particularly relates to a server hot plug circuit short circuit protection auxiliary device.
Background
The server-powered PSU provides two 12V power supplies: one is P12V _ STBY, which has 12V output as long as there is ac voltage input, but the load capacity is weak, only a few amperes current; the other is P12V _ PSU, the PSON # signal of the PSU needs to be output after being set low, the power supply has strong load capacity, and the load current capacity can reach dozens of amperes to hundreds of amperes according to different specifications of the PSU. The server is provided with a plurality of power utilization branches taking P12V _ PSU as a power supply, such as an input power supply P12V _ SYS of a CPU & Memory power supply circuit, an input power supply P12V _ HDD of a hard disk backboard and an input power supply P12V _ FAN of a FAN circuit.
For each 12V power utilization branch of the server, a hot plug protection circuit or an Efuse protection circuit is added at the input end (a board-board connection part, a board-cable connection part and a VR circuit input end) of each 12V power utilization branch of the server, when the short circuit and overcurrent faults of the terminal are detected, the protection circuit can disconnect the 12V power utilization branch from the P12V _ PSU, isolate the faults at the rear end from the PSU and other 12V circuits, avoid the circuit damage and even burnout caused by long-time short circuit and overcurrent at the rear end, and do not cut off the power utilization of other branches.
However, the method of singly adopting the protection circuit to perform short-circuit protection on the power utilization branch has the following problems: (1) the protection circuit flows larger current for a long time, and is more prone to aging than a non-power circuit. Various complex short circuit and overcurrent conditions can destroy the protection circuit before a protection mechanism is triggered, so that the protection circuit cannot be automatically switched on and off and always keeps off or on; (2) a 12V power utilization branch fails, so that the instant protection of the whole server cannot be directly triggered, and chain damage can be caused before other protection mechanisms of the server are started; (3) the method of adding the protection circuit at the input end only processes the short circuit and overcurrent conditions at the rear end of the protection circuit, and cannot process the short circuit abnormity between the PSU and the protection circuit. When a local short circuit to the ground or an overcurrent occurs at a specific position of the front end of the protection circuit due to an abnormal condition, the condition can not trigger the protection of the protection circuit. And because of the restriction of the Layout wiring, the short-circuit current is restricted, which is not enough to trigger the self protection of the PSU.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides an auxiliary device for server hot-plug circuit short-circuit protection, so as to solve the above-mentioned technical problems.
The invention provides a server hot plug circuit short circuit protection auxiliary device, the device includes:
the circuit comprises a voltage detection circuit, a self-locking voltage comparator and a level control circuit, wherein the voltage detection circuit detects a line between a power output end of a P12V _ PSU and an input end of a branch protection circuit; the output end of the voltage detection circuit is connected with the input end of the self-locking voltage comparator; the output end of the self-locking voltage comparator is connected with the input end of the level control circuit; the output end of the level control circuit is connected with a PSON control pin of a P12_ PSU power supply.
Further, the voltage detection circuit is a voltage amplification circuit.
Further, the voltage detection circuit includes:
the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a first operational amplifier chip, wherein the first resistor is connected between a power supply output end of a P12V _ PSU and a negative pin of the first operational amplifier chip in series; the second resistor is connected between the input end of the branch circuit protection circuit and the positive pin of the first operational amplifier chip in series; the third resistor is a grounding resistor connected between the second resistor and the positive pin of the first operational amplifier chip; and two ends of the fourth resistor are respectively connected with the negative pin of the first operational amplifier chip and the output pin of the first operational amplifier chip.
Further, the self-locking voltage comparator comprises:
the voltage detection circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second operational amplifier chip and a first NMOS (N-channel metal oxide semiconductor) tube, wherein the fifth resistor is connected between the output end of the voltage detection circuit and the positive pin of the second operational amplifier chip in series; the sixth resistor is connected in series between the negative pin of the second operational amplifier chip and the D pole of the first NMOS tube; the seventh resistor is a pull-up resistor arranged between the fifth resistor and the positive pin of the second operational amplifier chip; the eighth resistor is connected in series between the output pin of the second operational amplifier chip and the G pole of the first NMOS tube; the ninth resistor is a pull-up resistor connected between the D pole of the first NMOS tube and the sixth resistor; the tenth resistor is connected between the D pole of the first NMOS tube and the s pole of the first NMOS tube; and the s pole of the first NMOS tube is grounded with the connecting circuit of the tenth resistor.
Further, the level control circuit includes:
the device comprises a second NMOS tube, an eleventh resistor and a twelfth resistor, wherein the eleventh resistor is a pull-up resistor connected with a D pole of the second NMOS tube; the twelfth resistor is a grounding resistor connected with the s pole of the second NMOS tube; the G pole of the second NMOS tube is connected with a connecting circuit between the eighth resistor and the G pole of the first NMOS tube; and the s pole of the second NMOS tube is connected with the PSON signal input end of the P12V _ PSU power supply.
Furthermore, power connected with the power pin of the first operational amplifier chip and the power pin of the second operational amplifier chip are both generated by the P12V _ STBY power.
Further, the pull-up resistors are all connected with a P3V3_ STBY power supply, and the P3V3_ STBY power supply is generated by a P12V _ STBY power supply.
The beneficial effect of the invention is that,
the invention provides a server hot-plug circuit short-circuit protection auxiliary device, which is characterized in that a P12V _ PSU branch line from a PSU end to an input end of a hot-plug protection circuit is equivalent to a detection resistor R0, a voltage difference signal of a detection resistor R0 is obtained through a voltage detection circuit, a control level signal is generated through a self-locking voltage comparator according to the voltage difference signal, and a control signal of a PSU end P12V _ PSU power supply is generated after the control level signal is subjected to stability restoration through a level control circuit. The invention supplements the original hot plug protection circuit, and when the short circuit fault of the branch circuit is detected, the power supply at the PSU end is quickly closed, thereby avoiding the high-temperature burning risk caused by the short circuit/overcurrent after the current protection circuit is invalid.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or prior art solutions of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a protection circuit according to an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Referring to fig. 1, the present embodiment provides an auxiliary device for server hot plug circuit short circuit protection, where the device includes:
a voltage detection circuit M1, a self-locking voltage comparator M2 and a level control circuit M3, wherein the voltage detection circuit M1 detects a line (represented by a detection resistor R0) between the power output end of the P12V _ PSU and the input end of the branch protection circuit, and the branch protection circuit is shown in FIG. 2. The output end of the voltage detection circuit M1 is connected with the input end of the self-locking voltage comparator M2, the output end of the self-locking voltage comparator M2 is connected with the input end of the level control circuit M3, and the output end of the level control circuit M3 is connected with the P12V _ PSU power supply.
Wherein, voltage detection circuit M1 includes: the resistor R1, the resistor R2, the resistor R3, the resistor R4 and the resistor U1, and the resistor R1 is connected between the power output end of the P12V _ PSU and the negative pin of the U1 in series; the resistor R2 is connected in series between the input end of the branch circuit protection circuit and the positive pin of the U1; the resistor R3 is a grounding resistor connected between the resistor R2 and the positive pin of the U1; two ends of the resistor R4 are respectively connected with the negative pin of U1 and the output pin of U1.
The self-locking voltage comparator M2 includes: the resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the resistor R10, the resistor U2 and the resistor Q1 are connected in series, and the resistor R5 is connected between the output end of the voltage detection circuit and the positive pin of the U2 in series; the resistor R6 is connected in series between the negative pin of U2 and the pole Q1D; the resistor R7 is a pull-up resistor arranged between the resistor R5 and the positive pin of the U2; the resistor R8 is connected in series between the U2 output pin and the pole Q1G; the resistor R9 is a pull-up resistor connected between the pole Q1D and the resistor R6; the resistor R10 is connected between the pole Q1D and the pole Q1 s; the connection line between the pole Q1s and the resistor R10 is grounded.
The level control circuit M3 includes: q2, resistance R11 and resistance R12, resistance R11 is the pull-up resistance who connects Q2D utmost point; the resistor R12 is a grounding resistor connected with the pole Q2 s; a G pole of the Q2 is connected with a connecting line between the R8 and the Q1G pole; the Q2s pole is connected to the PSON signal input of the P12V _ PSU power supply.
In this embodiment, the power supply connected to the power pin of U1 and the power pin of U2 are both generated by the P12V _ STBY power supply. All pull-up resistor connected P3V3_ STBY power supplies are generated by the P12V _ STBY power supply.
The application flow of the device provided by the embodiment is as follows:
(1) and (3) normal state: when the server is normally powered on, the voltage difference between two ends of the R0 is 0, and the U1 outputs low level; dividing the voltage by R9/R10 to obtain a reference voltage Vref as an inverted input voltage of U2; the R5/R7 divides the voltage to be the non-inverting input voltage Vi of the U2; at this time, Vi < Vref, U2 outputs low level; Q1/Q2 is turned off, PSON # is kept at low level, and P12V _ PSU outputs normally;
(2) short-circuit state: when the P12V _ PSU outputs normally, the voltage difference between two ends of the R0 becomes larger along with the increase of the current flowing through the branch, and the output value of the U1 becomes higher; when a short circuit/overcurrent fault occurs, the output value of U1 is the highest, the voltage Vi of the non-inverting input end of U2 is larger than the reference voltage Vref, and U2 is triggered to output a high level; if the voltage Vref at the inverting input end of U2 is 0, Vi > Vref continues to be established, and the output end of U2 is locked at a high level; at this time, the G-pole of Q2 is also maintained at high level, Q2 is kept on, PSON # is kept at high level because R12 has current flowing, and the P12V _ PSU output is turned off;
(3) when in the short-circuit state, the output end of the U2 is always locked at a high level, namely, once the short circuit is detected, the output of the P12V _ PSU is closed, and even if the voltage difference between the two ends of the R0 is 0 again, the P12V _ PSU cannot be output again; the lock of U2 is released only when P12V _ STBY has no output, i.e., the PSU AC voltage input is disconnected; and connecting the PSU alternating voltage input again, and entering a normal state.
Example 2
This embodiment provides a server hot plug circuit short-circuit protection auxiliary device, the device includes:
the circuit comprises a voltage detection circuit, a self-locking voltage comparator and a level control circuit, wherein the voltage detection circuit detects a line between a power output end of the P12V _ PSU and an input end of a branch protection circuit, and the branch protection circuit is shown in figure 2. The output end of the voltage detection circuit is connected with the input end of the self-locking voltage comparator, the output end of the self-locking voltage comparator is connected with the input end of the level control circuit, and the output end of the level control circuit is connected with a PSON control pin of a P12_ PSU power supply.
Example 3
This embodiment provides a server hot plug circuit short-circuit protection auxiliary device, the device includes:
the circuit comprises a voltage detection circuit, a self-locking voltage comparator and a level control circuit, wherein the voltage detection circuit detects a line between a power output end of a P12V _ PSU and an input end of a branch protection circuit, and the branch protection circuit is shown in figure 2. The output end of the voltage detection circuit is connected with the input end of the self-locking voltage comparator, the output end of the self-locking voltage comparator is connected with the input end of the level control circuit, and the output end of the level control circuit is connected with a PSON control pin of a P12_ PSU power supply. The voltage detection circuit is a voltage amplification circuit, amplifies and outputs a weak voltage difference signal at two ends of R0, and the specific amplification factor needs to be set according to the actual working condition of the board card.
Example 4
The server hot plug circuit short circuit protection auxiliary device provided in this embodiment is different from that in embodiment 1 in that the power pin of U1, the power pin of U2, and all pull-up resistors in this embodiment are all connected to a dedicated power supply.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A server hot-plug circuit short protection auxiliary device, the device comprising:
the circuit comprises a voltage detection circuit, a self-locking voltage comparator and a level control circuit, wherein the voltage detection circuit detects a line between a power output end of a P12V _ PSU and an input end of a branch protection circuit; the output end of the voltage detection circuit is connected with the input end of the self-locking voltage comparator; the output end of the self-locking voltage comparator is connected with the input end of the level control circuit; the output end of the level control circuit is connected with a PSON control pin of a P12_ PSU power supply so as to send a level signal to the PSON control pin of the P12_ PSU power supply, and the level signal is used for controlling the P12_ PSU power supply to close the output when a line between the output end of the P12V _ PSU power supply and the input end of the branch protection circuit is short-circuited.
2. The apparatus of claim 1, wherein the voltage detection circuit is a voltage amplification circuit.
3. The apparatus of claim 1, wherein the voltage detection circuit comprises:
the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor and a first operational amplifier chip, wherein the first resistor is connected between a power supply output end of a P12V _ PSU and a negative pin of the first operational amplifier chip in series; the second resistor is connected between the input end of the branch circuit protection circuit and the positive pin of the first operational amplifier chip in series; the third resistor is a grounding resistor connected between the second resistor and the positive pin of the first operational amplifier chip; and two ends of the fourth resistor are respectively connected with the negative pin of the first operational amplifier chip and the output pin of the first operational amplifier chip.
4. The apparatus of claim 3, wherein the self-latching voltage comparator comprises:
the voltage detection circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second operational amplifier chip and a first NMOS (N-channel metal oxide semiconductor) tube, wherein the fifth resistor is connected between the output end of the voltage detection circuit and a positive pin of the second operational amplifier chip in series; the sixth resistor is connected in series between the negative pin of the second operational amplifier chip and the D pole of the first NMOS tube; the seventh resistor is a pull-up resistor arranged between the fifth resistor and the positive pin of the second operational amplifier chip; the eighth resistor is connected between the output pin of the second operational amplifier chip and the G pole of the first NMOS tube in series; the ninth resistor is a pull-up resistor connected between the D pole of the first NMOS tube and the sixth resistor; the tenth resistor is connected between the D pole of the first NMOS tube and the s pole of the first NMOS tube; and the s pole of the first NMOS tube is grounded with the connecting circuit of the tenth resistor.
5. The apparatus of claim 4, wherein the level control circuit comprises:
the resistor comprises a second NMOS tube, an eleventh resistor and a twelfth resistor, wherein the eleventh resistor is a pull-up resistor connected with the D pole of the second NMOS tube; the twelfth resistor is a grounding resistor connected with the s pole of the second NMOS tube; the G pole of the second NMOS tube is connected with a connecting circuit between the eighth resistor and the G pole of the first NMOS tube; and the s pole of the second NMOS tube is connected with the PSON signal input end of the P12V _ PSU power supply.
6. The apparatus of claim 4, wherein the power supply connected to the power supply pin of the first operational amplifier chip and the power supply pin of the second operational amplifier chip are both generated by a P12V _ STBY power supply.
7. The apparatus of claim 5, wherein the pull-up resistors are each connected to a P3V3_ STBY power supply, the P3V3_ STBY power supply being generated by a P12V _ STBY power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094734.6A CN111313359B (en) | 2020-02-16 | 2020-02-16 | Server hot plug circuit short-circuit protection auxiliary device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010094734.6A CN111313359B (en) | 2020-02-16 | 2020-02-16 | Server hot plug circuit short-circuit protection auxiliary device |
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| CN111313359A CN111313359A (en) | 2020-06-19 |
| CN111313359B true CN111313359B (en) | 2022-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113204279B (en) * | 2021-04-23 | 2022-12-02 | 山东英信计算机技术有限公司 | Method, system, device and medium for improving server efficiency based on redundant power supply |
| CN113964808B (en) * | 2021-12-22 | 2022-03-04 | 苏州浪潮智能科技有限公司 | Hot plug line input end spike suppression device |
| CN115377955B (en) * | 2022-08-29 | 2024-01-12 | 苏州浪潮智能科技有限公司 | Power supply hot plug device with current limiting function |
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| CN207967908U (en) * | 2018-04-04 | 2018-10-12 | 河北祥熙电气有限公司 | A kind of startup power supply short-circuit protection detection circuit |
| CN108462147B (en) * | 2018-04-04 | 2024-03-08 | 河北祥熙电气有限公司 | Start power supply short-circuit protection detection circuit and detection method thereof |
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