CN114003539A - Server mainboard hot plug control protection circuit and protection method - Google Patents
Server mainboard hot plug control protection circuit and protection method Download PDFInfo
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- CN114003539A CN114003539A CN202111256560.XA CN202111256560A CN114003539A CN 114003539 A CN114003539 A CN 114003539A CN 202111256560 A CN202111256560 A CN 202111256560A CN 114003539 A CN114003539 A CN 114003539A
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- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 12
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 12
- 239000004065 semiconductor Substances 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000002441 reversible effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 101150085905 DCP2 gene Proteins 0.000 description 13
- 101100031494 Schizosaccharomyces pombe (strain 972 / ATCC 24843) psu1 gene Proteins 0.000 description 13
- 101100422754 Schizosaccharomyces pombe (strain 972 / ATCC 24843) sui1 gene Proteins 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- 229920002492 poly(sulfone) Polymers 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
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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
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
- G06F1/184—Mounting of motherboards
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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
Abstract
The invention provides a server mainboard hot plug control protection circuit and a protection method, comprising a PSU and a server mainboard; the server mainboard is provided with a power utilization module, a hot plug protection control module and a mainboard hot plug MOS (metal oxide semiconductor) tube; the PSU is provided with a bypass output line, a main power supply output line and a power supply starting signal line; the bypass output line is connected with the hot plug control protection module, the main power supply output line is connected with the drain electrode of the mainboard hot plug MOS tube, and the power supply starting signal line is connected with the hot plug control protection module; the grid of mainboard hot plug MOS pipe is connected with hot plug control protection module, and the source electrode and the power consumption module of mainboard hot plug MOS pipe are connected. The invention prevents the mainboard hot plug MOS tube for the hot plug circuit from working in the variable resistance region through the hot plug protection control module, thereby avoiding the mainboard hot plug MOS tube from being burnt out and providing the safety and reliability of the server mainboard.
Description
Technical Field
The invention belongs to the technical field of hot plug control, and particularly relates to a server mainboard hot plug control protection circuit and a protection method.
Background
The initial server product is in a whole cabinet, if the components need to be replaced, the whole server is taken out and replaced after power failure, and the requirement of hot plugging is avoided. Along with the occurrence of server modular design, the power supply module part needs to realize power supply input PSU module 1+1 redundancy configuration, 2 or more PSUs are adopted to supply power to the server at the same time, any one PSU is pulled out without influencing the server, and the PSU can be replaced on line. Meanwhile, a plurality of controller boxes are arranged in one server case, a mainboard and various board cards are arranged in the controller boxes, the controller boxes can be required to be replaced online, and a controller box without electricity is inserted into a normally working case with a motor, so that a mainboard capacitor in the controller box can be charged, and the server mainboard has hot plug requirements.
For a server with hot plug requirements, thousands of uF capacitors are distributed on a mainboard, and the current impact of hundreds of amperes or even thousands of amperes can be reached instantaneously when the capacitors are charged. For preventing to insert and lead to the electric current on the mainboard in the twinkling of an eye to strike, can place a hot plug control circuit at mainboard entrance for charging current can smooth transition. An MOS tube is connected between the hot plug control circuit and the PSU as well as between the PSU and the mainboard, the PSU is connected with the drain electrode of the MOS tube, the mainboard is connected with the source electrode of the MOS tube, and the hot plug control circuit is connected with the grid electrode of the MOS tube. The working state of the MOS tube is divided into a variable resistance region, a constant current region and a pinch-off region, the switching of the three states of the MOS tube can be realized by controlling the voltage between the grid electrode and the source electrode of the MOS tube, the MOS tube is controlled to be in the variable resistance region by the hot plug control circuit when the mainboard is inserted, the MOS tube is equivalent to a resistor at the moment, and the current is controlled by a mode similar to resistor current limiting. With the voltage increase of the main board side, the variable resistance area of the MOS tube is switched to the constant current area, the resistance of the MOS tube is gradually reduced until the MOS tube is completely conducted, and the purpose of instantly inhibiting current impact is finally achieved.
The existing hot plug control circuit only achieves overcurrent protection, namely, after the hot plug control circuit controls an MOS tube to be switched from a variable resistance area to a constant current area, only the magnitude of a current value is detected to perform overcurrent protection.
Therefore, it is very necessary to provide a server motherboard hot-plug control protection circuit and a protection method thereof to overcome the above-mentioned drawbacks in the prior art.
Disclosure of Invention
The invention provides a server mainboard hot plug control protection circuit and a protection method, aiming at the defects that the existing hot plug control circuit in the prior art only can detect the current to perform overcurrent protection, but can not detect whether an MOS tube completes the switching from a variable resistance region to a constant current region, and the MOS tube can be burnt if the existing hot plug control circuit works in the variable resistance region consistently.
In a first aspect, the present invention provides a server motherboard hot plug control protection circuit, including a PSU and a server motherboard;
the server mainboard is provided with a power utilization module, a hot plug protection control module and a mainboard hot plug MOS (metal oxide semiconductor) tube;
the PSU is provided with a bypass output line, a main power supply output line and a power supply starting signal line;
the bypass output line is connected with the hot plug control protection module, the main power supply output line is connected with the drain electrode of the mainboard hot plug MOS tube, and the power supply starting signal line is connected with the hot plug control protection module;
the grid of mainboard hot plug MOS pipe is connected with hot plug control protection module, and the source electrode and the power consumption module of mainboard hot plug MOS pipe are connected.
Furthermore, the hot plug control protection module comprises a grid voltage sampling unit, a voltage reference and delay unit, a voltage comparison unit and a PSU output switch control unit;
the input end of the grid voltage sampling unit is connected with the grid of the mainboard hot plug MOS tube, the first input end of the voltage comparison unit is connected with the output end of the voltage reference and delay unit, the second input end of the voltage comparison unit is connected with the output end of the grid voltage sampling unit, the output end of the voltage comparison unit is connected with the input end of the PSU output switch control unit, and the output end of the PSU output switch control unit is connected with the PSU through a power supply starting signal line;
and the bypass output line is connected with the grid voltage sampling unit, the voltage reference and delay unit, the voltage comparison unit and the PSU output switch control unit. The mode of the original hot plug circuit for controlling the hot plug of the mainboard MOS tube is realized by controlling the voltage between GS of the MOS tube, under the normal condition, when the hot plug of the mainboard MOS tube enters a constant current area, the grid voltage can reach more than 20V, and therefore, the grid voltage can be used for judging whether the hot plug of the mainboard MOS tube enters the constant current area or not by detecting the grid voltage. The bypass output line of the PSU is a normal voltage, the voltage is always present as long as the mains supply exists, the output power is low, the PSU is generally used for driving, and the output side does not have large capacitance, so that the hot plug influence does not need to be considered; the main power supply output line of the PSU is controlled electricity, the PSU only outputs voltage when receiving an effective signal of a power supply starting signal line, and the main power supply output line of the PSU has lower power and is a main power supply source of an electricity module of a server mainboard; when the mainboard hot plug MOS tube continuously works in the variable resistance area or the pinch-off area, all power supply of the server mainboard has a problem at a high probability, but even if the main power supply output line of the PSU is short-circuited, the normal work of the bypass output line cannot be influenced.
Further, the grid voltage adopting unit comprises a first operational amplifier;
the same-direction input end of the first operational amplifier is connected with a first resistor, the second end of the first resistor is connected with the grid electrode of the mainboard hot-plugging MOS tube, the reverse-direction input end of the first operational amplifier is connected with a second resistor, and the second end of the second resistor is grounded;
a feedback resistor is connected between the reverse input end and the forward input end of the first operational amplifier, and the output end of the first operational amplifier is connected with the voltage comparison unit;
the positive power supply end of the first operational amplifier is connected with a bypass output line of the PSU, and the negative power supply end of the first operational amplifier is grounded. The output voltage Vgout of the first operational amplifier is Vg Rf/R2, where Vg is the gate voltage of the main board hot-plug MOS transistor, Rf is the resistance value of the feedback resistor, and R2 is the resistance value of the second resistor.
Furthermore, the voltage reference and delay unit comprises a third resistor, a fourth resistor and a first capacitor;
the first end of the third resistor is connected with a bypass output line of the PSU, the second end of the third resistor is connected with the first end of the fourth resistor and the first end of the first capacitor, and the second end of the fourth resistor is connected with the second end of the first capacitor and grounded;
the first end of the fourth resistor and the first end of the first capacitor are connected with the voltage comparison unit. The value of the set time period for delaying can be adjusted by adjusting the values of the third resistor, the fourth resistor and the first capacitor.
Further, the voltage comparison unit comprises a second operational amplifier, a first diode and a fifth resistor;
the same-direction input end of the second operational amplifier is connected with the first end of a fifth resistor and the cathode of a first diode, the second end of the fifth resistor is connected with the first end of a fourth resistor and the first end of a first capacitor, and the anode of the first diode is connected with the output end of the second operational amplifier;
the reverse input end of the second operational amplifier is connected with the output end of the first operational amplifier;
and a positive power supply end of the second operational amplifier is connected with a bypass output line of the PSU, and a negative power supply end of the second operational amplifier is grounded. When the voltage of the same-direction input end of the first operational amplifier is higher than that of the reverse input end of the first operational amplifier, the output of the second operational amplifier is locked by the voltage of the bypass output line, so that the server mainboard is not output by the PSU unless being plugged with the PSU again, and the damage to a mainboard hot plug MOS (metal oxide semiconductor) tube is prevented.
Further, the PSU output switch control unit comprises a first switch MOS tube and a second switch MOS tube;
the grid electrode of the first switch MOS tube is connected with the output end of the second operational amplifier, the grid electrode of the first switch MOS tube is also connected with a sixth resistor, and the second end of the sixth resistor is connected with the source electrode of the first switch MOS tube and grounded;
the drain electrode of the first switch MOS tube is connected with the grid electrode of the second switch MOS tube, the drain electrode of the first switch MOS tube is also connected with a seventh resistor, and the second end of the seventh resistor is connected with a bypass output line of the PSU;
the drain electrode of the second switch MOS tube is connected with an eighth resistor and a ninth resistor and is also connected with the PSU through a power supply starting signal line;
the second end of the ninth resistor is connected with a bypass output line of the PSU, and the second end of the eighth resistor is connected with the source electrode of the second switch MOS tube and grounded. The first switch MOS tube and the second switch MOS tube are alternately conducted under the two conditions that the grid voltage of the mainboard hot plug MOS tube is higher than the reference voltage and lower than the reference voltage, so that the power supply starting signal line of the PSU is effectively controlled, and whether the main power supply output line of the PSU is output or not is controlled.
In a second aspect, the present invention provides a method for protecting a server motherboard hot-plug control protection circuit, including the following steps:
s1, a server mainboard is spliced with a PSU, and a hot plug control protection module detects whether a mainboard hot plug MOS tube is switched to a constant current area from a variable resistance area in a set time period;
s2, when the mainboard hot plug MOS tube is switched from the variable resistance area to the constant current area, the hot plug control protection module informs the PSU of supplying power to the server mainboard through the mainboard hot plug MOS tube through a power supply starting signal line;
and S3, when the hot plug MOS tube of the mainboard does not complete the switching from the variable resistance region to the constant current region, the hot plug control protection module cuts off the power supply starting signal line, and the PSU stops supplying power to the server mainboard through the hot plug MOS tube.
Further, the step S1 specifically includes the following steps:
s11, a server mainboard is spliced with a PSU, and the PSU supplies power to a first operational amplifier, a second operational amplifier, a voltage reference and delay unit, a first switch MOS tube and a second switch MOS tube through a bypass output line;
s12, sampling grid voltage of a mainboard hot-plug MOS (metal oxide semiconductor) tube by a first operational amplifier of the hot-plug protection control module, and providing the grid voltage for a second operational amplifier;
s13, a voltage reference and delay unit of the hot plug protection control module provides reference voltage and a set time period for delay to a second operational amplifier;
s14, comparing whether the reference voltage in the set time is lower than the grid voltage of the sampled mainboard hot-plug MOS tube by a second operational amplifier of the hot-plug protection control module;
if yes, go to step S2;
if not, the process proceeds to step S3.
Further, the step S2 specifically includes the following steps:
s21, setting the reference voltage to be lower than the grid voltage of the sampled mainboard hot-plug MOS tube within the set time, and judging that the mainboard hot-plug MOS tube is switched to a constant current area from a variable resistance area;
s22, the second operational amplifier outputs a low level, the first switch MOS tube is not conducted, the second switch MOS tube is conducted, the power supply starting signal line outputs the low level, and the PSU supplies power to the power utilization module through the main board hot plug MOS tube through the main power supply output line.
Further, the step S3 specifically includes the following steps:
s31, the reference voltage exceeding the set time period is higher than the grid voltage of the sampled mainboard hot-plug MOS tube, the mainboard hot-plug MOS tube is judged not to be switched to a constant current area from a variable resistance area, and the voltage of the homodromous input end of the second operational amplifier is locked through the voltage of the first diode and the bypass output line;
and S32, the second operational amplifier outputs a high level, the first switch MOS tube is conducted, the second switch MOS tube is not conducted, the power supply starting signal line outputs the high level, the PSU disconnects the voltage output of the main power supply output line, and the mainboard hot plug MOS tube stops supplying power to the power utilization module.
The beneficial effect of the invention is that,
according to the server mainboard hot plug control protection circuit and the server mainboard hot plug control protection method, the hot plug protection control module is used for preventing the mainboard hot plug MOS tube for the hot plug circuit from working in the variable resistance region, so that the mainboard hot plug MOS tube is prevented from being burnt out, and the safety and the reliability of the server mainboard are improved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art 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 that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment 1 of a server motherboard hot-plug control protection circuit according to the present invention.
Fig. 2 is a schematic structural diagram of an embodiment 2 of a server motherboard hot-plug control protection circuit according to the present invention.
Fig. 3 is a circuit schematic diagram of a server motherboard hot plug control protection circuit in embodiment 3 of the invention.
Fig. 4 is a flowchart illustrating a method for protecting a server motherboard hot plug control protection circuit according to embodiment 4 of the present invention.
Fig. 5 is a flowchart illustrating a method for protecting a server motherboard hot plug control protection circuit according to embodiment 5 of the present invention.
In the figure, 1-PSU; 2-a server mainboard; 3-a power utilization module; 4-hot plug protection control module; 4.1-grid voltage sampling unit; 4.2-voltage reference and delay unit; 4.3-voltage comparison unit; 4.4-PSU output switch control unit; 5-hot plugging an MOS tube on the main board; P12V _ STBY-bypass output line; P12V _ PSU-main supply output line; P12V _ ON _ N-power supply start signal line; u1-first operational amplifier; u2-second operational amplifier; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance; r9 — ninth resistor; rf-feedback resistance; c1 — first capacitance; q1-first switch MOS tube; q2-second switch MOS tube; d1 — first diode.
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.
Example 1:
as shown in fig. 1, the present invention provides a server motherboard hot-plug control protection circuit, which includes a PSU1 and a server motherboard 2;
the server mainboard 2 is provided with an electricity utilization module 3, a hot plug protection control module 4 and a mainboard hot plug MOS (metal oxide semiconductor) tube 5;
the PSU1 is provided with a bypass output line P12V _ STBY, a main power supply output line P12V _ PSU, and a power supply start signal line P12V _ ON _ N;
a bypass output line P12V _ STBY is connected with the hot plug control protection module 4, a main power supply output line P12V _ PSU is connected with the drain electrode of the mainboard hot plug MOS tube 5, and a power supply starting signal line P12V _ ON _ N is connected with the hot plug control protection module 4;
the grid of mainboard hot plug MOS pipe 5 is connected with hot plug control protection module 4, and the source electrode of mainboard hot plug MOS pipe 5 is connected with power module 3.
According to the server mainboard hot plug control protection circuit, the mainboard hot plug MOS tube for the hot plug circuit is prevented from working in the variable resistance region through the hot plug protection control module, so that the mainboard hot plug MOS tube is prevented from being burnt out, and the safety and reliability of the server mainboard are improved.
Example 2:
as shown in fig. 2, the present invention provides a server motherboard hot-plug control protection circuit, which includes a PSU1 and a server motherboard 2;
the server mainboard 2 is provided with an electricity utilization module 3, a hot plug protection control module 4 and a mainboard hot plug MOS (metal oxide semiconductor) tube 5;
the PSU1 is provided with a bypass output line P12V _ STBY, a main power supply output line P12V _ PSU, and a power supply start signal line P12V _ ON _ N;
a bypass output line P12V _ STBY is connected with the hot plug control protection module 4, a main power supply output line P12V _ PSU is connected with the drain electrode of the mainboard hot plug MOS tube 5, and a power supply starting signal line P12V _ ON _ N is connected with the hot plug control protection module 4;
the grid electrode of the mainboard hot plug MOS tube 5 is connected with the hot plug control protection module 4, and the source electrode of the mainboard hot plug MOS tube 5 is connected with the power utilization module 3;
the hot plug control protection module 4 comprises a grid voltage sampling unit 4.1, a voltage reference and delay unit 4.2, a voltage comparison unit 4.3 and a PSU output switch control unit 4.4;
the input end of a grid voltage sampling unit 4.1 is connected with the grid of a mainboard hot plug MOS (metal oxide semiconductor) tube 5, the first input end of a voltage comparison unit 4.3 is connected with the output end of a voltage reference and delay unit 4.2, the second input end of the voltage comparison unit 4.3 is connected with the output end of the grid voltage sampling unit 4.1, the output end of the voltage comparison unit 4.3 is connected with the input end of a PSU (power supply unit) output switch control unit 4.4, and the output end of the PSU output switch control unit 4.4 is connected with the PSU1 through a power supply starting signal line P12V _ ON _ N;
the bypass output line P12V _ STBY is connected to the gate voltage sampling unit 4.1, the voltage reference and delay unit 4.2, the voltage comparison unit 4.3 and the PSU output switch control unit 4.4.
Example 3:
as shown in fig. 3, the present invention provides a server motherboard hot plug control protection circuit, which includes a PSU1 and a server motherboard 2;
the server mainboard 2 is provided with an electricity utilization module 3, a hot plug protection control module 4 and a mainboard hot plug MOS (metal oxide semiconductor) tube 5;
the PSU1 is provided with a bypass output line P12V _ STBY, a main power supply output line P12V _ PSU, and a power supply start signal line P12V _ ON _ N;
a bypass output line P12V _ STBY is connected with the hot plug control protection module 4, a main power supply output line P12V _ PSU is connected with the drain electrode of the mainboard hot plug MOS tube 5, and a power supply starting signal line P12V _ ON _ N is connected with the hot plug control protection module 4;
the grid electrode of the mainboard hot plug MOS tube 5 is connected with the hot plug control protection module 4, and the source electrode of the mainboard hot plug MOS tube 5 is connected with the power utilization module 3;
the hot plug control protection module 4 comprises a grid voltage sampling unit 4.1, a voltage reference and delay unit 4.2, a voltage comparison unit 4.3 and a PSU output switch control unit 4.4;
the input end of a grid voltage sampling unit 4.1 is connected with the grid of a mainboard hot plug MOS (metal oxide semiconductor) tube 5, the first input end of a voltage comparison unit 4.3 is connected with the output end of a voltage reference and delay unit 4.2, the second input end of the voltage comparison unit 4.3 is connected with the output end of the grid voltage sampling unit 4.1, the output end of the voltage comparison unit 4.3 is connected with the input end of a PSU (power supply unit) output switch control unit 4.4, and the output end of the PSU output switch control unit 4.4 is connected with the PSU1 through a power supply starting signal line P12V _ ON _ N;
a bypass output line P12V _ STBY is connected with the gate voltage sampling unit 4.1, the voltage reference and delay unit 4.2, the voltage comparison unit 4.3 and the PSU output switch control unit 4.4;
the gate voltage adoption unit 4.1 comprises a first operational amplifier U1;
the same-direction input end of the first operational amplifier U1 is connected with a first resistor R1, the second end of the first resistor R1 is connected with the grid of the mainboard hot-plug MOS transistor 5, the reverse-direction input end of the first operational amplifier U1 is connected with a second resistor R2, and the second end of the second resistor R2 is grounded;
a feedback resistor Rf is connected between the reverse input end and the forward input end of the first operational amplifier U1, and the output end of the first operational amplifier U1 is connected with the voltage comparison unit 4.3;
the positive power supply end of the first operational amplifier U1 is connected with a bypass output line P12V _ STBY of the PSU1, and the negative power supply end of the first operational amplifier U1 is grounded;
the voltage reference and delay unit 4.2 comprises a third resistor R3, a fourth resistor R4 and a first capacitor C1;
a first end of the third resistor R3 is connected with the bypass output line P12V _ STBY of the PSU1, a second end of the third resistor R3 is connected with a first end of the fourth resistor R4 and a first end of the first capacitor C1, and a second end of the fourth resistor R4 is connected with a second end of the first capacitor C1 and grounded;
the first end of the fourth resistor R4 and the first end of the first capacitor C1 are connected with the voltage comparison unit 4.3;
the voltage comparison unit 4.3 comprises a second operational amplifier U2, a first diode D1 and a fifth resistor R5;
the same-direction input end of the second operational amplifier U2 is connected with the first end of a fifth resistor R5 and the cathode of a first diode D1, the second end of the fifth resistor R5 is connected with the first end of a fourth resistor R4 and the first end of a first capacitor C1, and the anode of a first diode D1 is connected with the output end of the second operational amplifier U2;
the reverse input end of the second operational amplifier U2 is connected with the output end of the first operational amplifier U1;
the positive power supply end of the second operational amplifier U2 is connected with the bypass output line P12V _ STBY of the PSU1, and the negative power supply end of the second operational amplifier U2 is grounded;
the PSU output switch control unit 4.4 includes a first switch MOS transistor Q1 and a second switch MOS transistor Q2;
the grid electrode of the first switching MOS transistor Q1 is connected with the output end of the second operational amplifier U2, the grid electrode of the first switching MOS transistor Q1 is also connected with a sixth resistor R6, and the second end of the sixth resistor R6 is connected with the source electrode of the first switching MOS transistor Q1 and is grounded;
the drain of the first switching MOS transistor Q1 is connected with the gate of the second switching MOS transistor Q2, the drain of the first switching MOS transistor Q1 is further connected with a seventh resistor R7, and the second end of the seventh resistor R7 is connected with the bypass output line P12V _ STBY of the PSU 1;
the drain electrode of the second switching MOS transistor Q2 is connected with an eighth resistor R8 and a ninth resistor R9, and the drain electrode of the second switching MOS transistor Q2 is also connected with the PSU1 through a power supply starting signal line P12V _ ON _ N;
a second end of the ninth resistor R9 is connected to the bypass output line P12V _ STBY of the PSU1, and a second end of the eighth resistor R8 is connected to the source of the second switching MOS transistor Q2 and grounded.
Example 4:
as shown in fig. 4, the present invention provides a protection method for a server motherboard hot-plug control protection circuit, which comprises the following steps:
s1, a server mainboard is spliced with a PSU, and a hot plug control protection module detects whether a mainboard hot plug MOS tube is switched to a constant current area from a variable resistance area in a set time period;
s2, when the mainboard hot plug MOS tube is switched from the variable resistance area to the constant current area, the hot plug control protection module informs the PSU of supplying power to the server mainboard through the mainboard hot plug MOS tube through a power supply starting signal line;
and S3, when the hot plug MOS tube of the mainboard does not complete the switching from the variable resistance region to the constant current region, the hot plug control protection module cuts off the power supply starting signal line, and the PSU stops supplying power to the server mainboard through the hot plug MOS tube.
According to the protection method of the server mainboard hot plug control protection circuit, the mainboard hot plug MOS tube for the hot plug circuit is prevented from working in the variable resistance region through the hot plug protection control module, so that the mainboard hot plug MOS tube is prevented from being burnt out, and the safety and the reliability of the server mainboard are improved.
Example 5:
as shown in fig. 5, the present invention provides a protection method for a server motherboard hot-plug control protection circuit, which comprises the following steps:
s1, a server mainboard is spliced with a PSU, and a hot plug control protection module detects whether a mainboard hot plug MOS tube is switched to a constant current area from a variable resistance area in a set time period; the method comprises the following specific steps:
s11, a server mainboard is spliced with a PSU, and the PSU supplies power to a first operational amplifier, a second operational amplifier, a voltage reference and delay unit, a first switch MOS tube and a second switch MOS tube through a bypass output line;
s12, sampling grid voltage of a mainboard hot-plug MOS (metal oxide semiconductor) tube by a first operational amplifier of the hot-plug protection control module, and providing the grid voltage for a second operational amplifier;
s13, a voltage reference and delay unit of the hot plug protection control module provides reference voltage and a set time period for delay to a second operational amplifier;
s14, comparing whether the reference voltage in the set time is lower than the grid voltage of the sampled mainboard hot-plug MOS tube by a second operational amplifier of the hot-plug protection control module;
if yes, go to step S2;
if not, go to step S3;
s2, when the mainboard hot plug MOS tube is switched from the variable resistance area to the constant current area, the hot plug control protection module informs the PSU of supplying power to the server mainboard through the mainboard hot plug MOS tube through a power supply starting signal line; the method comprises the following specific steps:
s21, setting the reference voltage to be lower than the grid voltage of the sampled mainboard hot-plug MOS tube within the set time, and judging that the mainboard hot-plug MOS tube is switched to a constant current area from a variable resistance area;
s22, the second operational amplifier outputs a low level, the first switch MOS tube is not conducted, the second switch MOS tube is conducted, the power supply starting signal line outputs the low level, and the PSU supplies power to the power utilization module through the main board hot plug MOS tube through the main power supply output line;
s3, when the hot plug MOS tube of the mainboard does not complete the switching from the variable resistance region to the constant current region, the hot plug control protection module cuts off the power supply starting signal line, and the PSU stops supplying power to the server mainboard through the hot plug MOS tube; the method comprises the following specific steps:
s31, the reference voltage exceeding the set time period is higher than the grid voltage of the sampled mainboard hot-plug MOS tube, the mainboard hot-plug MOS tube is judged not to be switched to a constant current area from a variable resistance area, and the voltage of the homodromous input end of the second operational amplifier is locked through the voltage of the first diode and the bypass output line;
and S32, the second operational amplifier outputs a high level, the first switch MOS tube is conducted, the second switch MOS tube is not conducted, the power supply starting signal line outputs the high level, the PSU disconnects the voltage output of the main power supply output line, and the mainboard hot plug MOS tube stops supplying power to the power utilization module.
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 appended claims.
Claims (10)
1. A server mainboard hot plug control protection circuit is characterized by comprising a PSU (1) and a server mainboard (2);
the server mainboard (2) is provided with an electricity utilization module (3), a hot plug protection control module (4) and a mainboard hot plug MOS (metal oxide semiconductor) tube (5);
the PSU (1) is provided with a bypass output line (P12V _ STBY), a main power supply output line (P12V _ PSU) and a power supply starting signal line (P12V _ ON _ N);
the bypass output line (P12V _ STBY) is connected with the hot plug control protection module (4), the main power supply output line (P12V _ PSU) is connected with the drain electrode of the mainboard hot plug MOS tube (5), and the power supply starting signal line (P12V _ ON _ N) is connected with the hot plug control protection module (4);
the grid of mainboard hot plug MOS pipe (5) is connected with hot plug control protection module (4), and the source electrode of mainboard hot plug MOS pipe (5) is connected with power module (3).
2. The server motherboard hot plug control protection circuit as claimed in claim 1, wherein the hot plug control protection module (4) comprises a gate voltage sampling unit (4.1), a voltage reference and delay unit (4.2), a voltage comparison unit (4.3) and a PSU output switch control unit (4.4);
the input end of a grid voltage sampling unit (4.1) is connected with the grid of a mainboard hot plug MOS (5), the first input end of a voltage comparison unit (4.3) is connected with the output end of a voltage reference and delay unit (4.2), the second input end of the voltage comparison unit (4.3) is connected with the output end of the grid voltage sampling unit (4.1), the output end of the voltage comparison unit (4.3) is connected with the input end of a PSU output switch control unit (4.4), and the output end of the PSU output switch control unit (4.4) is connected with the PSU (1) through a power supply starting signal line (P12V _ ON _ N);
the bypass output line (P12V _ STBY) is connected with the grid voltage sampling unit (4.1), the voltage reference and delay unit (4.2), the voltage comparison unit (4.3) and the PSU output switch control unit (4.4).
3. A server motherboard hot plug control protection circuit as claimed in claim 2, characterized in that the gate voltage adoption unit (4.1) comprises a first operational amplifier (U1);
the same-direction input end of the first operational amplifier (U1) is connected with a first resistor (R1), the second end of the first resistor (R1) is connected with the grid of the mainboard hot-plug MOS (5), the reverse input end of the first operational amplifier (U1) is connected with a second resistor (R2), and the second end of the second resistor (R2) is grounded;
a feedback resistor (Rf) is connected between the reverse input end and the forward input end of the first operational amplifier (U1), and the output end of the first operational amplifier (U1) is connected with the voltage comparison unit (4.3);
the positive power supply terminal of the first operational amplifier (U1) is connected with the bypass output line (P12V _ STBY) of the PSU (1), and the negative power supply terminal of the first operational amplifier (U1) is grounded.
4. A server motherboard hot-plug control protection circuit as claimed in claim 3, characterized in that the voltage reference and delay unit (4.2) comprises a third resistor (R3), a fourth resistor (R4) and a first capacitor (C1);
a first end of a third resistor (R3) is connected with a bypass output line (P12V _ STBY) of the PSU (1), a second end of the third resistor (R3) is connected with a first end of a fourth resistor (R4) and a first end of a first capacitor (C1), and a second end of the fourth resistor (R4) is connected with a second end of the first capacitor (C1) and grounded;
a first end of the fourth resistor (R4) and a first end of the first capacitor (C1) are connected with the voltage comparison unit (4.3).
5. The server motherboard hot plug control protection circuit as claimed in claim 4, characterized in that the voltage comparison unit (4.3) comprises a second operational amplifier (U2), a first diode (D1) and a fifth resistor (R5);
the same-direction input end of the second operational amplifier (U2) is connected with the first end of a fifth resistor (R5) and the cathode of a first diode (D1), the second end of the fifth resistor (R5) is connected with the first end of a fourth resistor (R4) and the first end of a first capacitor (C1), and the anode of a first diode (D1) is connected with the output end of the second operational amplifier (U2);
the reverse input end of the second operational amplifier (U2) is connected with the output end of the first operational amplifier (U1);
the positive power supply end of the second operational amplifier (U2) is connected with the bypass output line (P12V _ STBY) of the PSU (1), and the negative power supply end of the second operational amplifier (U2) is grounded.
6. The server motherboard hot plug control protection circuit as claimed in claim 5, wherein the PSU output switch control unit (4.4) comprises a first switch MOS transistor (Q1) and a second switch MOS transistor (Q2);
the grid electrode of the first switch MOS tube (Q1) is connected with the output end of the second operational amplifier (U2), the grid electrode of the first switch MOS tube (Q1) is also connected with a sixth resistor (R6), and the second end of the sixth resistor (R6) is connected with the source electrode of the first switch MOS tube (Q1) and is grounded;
the drain electrode of the first switch MOS tube (Q1) is connected with the gate electrode of the second switch MOS tube (Q2), the drain electrode of the first switch MOS tube (Q1) is also connected with a seventh resistor (R7), and the second end of the seventh resistor (R7) is connected with a bypass output line (P12V _ STBY) of the PSU (1);
the drain electrode of the second switch MOS tube (Q2) is connected with an eighth resistor (R8) and a ninth resistor (R9), and the drain electrode of the second switch MOS tube (Q2) is also connected with the PSU (1) through a power supply starting signal line (P12V _ ON _ N);
the second end of the ninth resistor (R9) is connected with the bypass output line (P12V _ STBY) of the PSU (1), and the second end of the eighth resistor (R8) is connected with the source electrode of the second switch MOS tube (Q2) and is grounded.
7. A protection method for a server mainboard hot plug control protection circuit is characterized by comprising the following steps:
s1, a server mainboard is spliced with a PSU, and a hot plug control protection module detects whether a mainboard hot plug MOS tube is switched to a constant current area from a variable resistance area in a set time period;
s2, when the mainboard hot plug MOS tube is switched from the variable resistance area to the constant current area, the hot plug control protection module informs the PSU of supplying power to the server mainboard through the mainboard hot plug MOS tube through a power supply starting signal line;
and S3, when the hot plug MOS tube of the mainboard does not complete the switching from the variable resistance region to the constant current region, the hot plug control protection module cuts off the power supply starting signal line, and the PSU stops supplying power to the server mainboard through the hot plug MOS tube.
8. The method for protecting a server motherboard hot plug control protection circuit as claimed in claim 7, wherein step S1 specifically comprises the following steps:
s11, a server mainboard is spliced with a PSU, and the PSU supplies power to a first operational amplifier, a second operational amplifier, a voltage reference and delay unit, a first switch MOS tube and a second switch MOS tube through a bypass output line;
s12, sampling grid voltage of a mainboard hot-plug MOS (metal oxide semiconductor) tube by a first operational amplifier of the hot-plug protection control module, and providing the grid voltage for a second operational amplifier;
s13, a voltage reference and delay unit of the hot plug protection control module provides reference voltage and a set time period for delay to a second operational amplifier;
s14, comparing whether the reference voltage in the set time is lower than the grid voltage of the sampled mainboard hot-plug MOS tube by a second operational amplifier of the hot-plug protection control module;
if yes, go to step S2;
if not, the process proceeds to step S3.
9. The method for protecting a server motherboard hot plug control protection circuit as claimed in claim 8, wherein step S2 specifically comprises the following steps:
s21, setting the reference voltage to be lower than the grid voltage of the sampled mainboard hot-plug MOS tube within the set time, and judging that the mainboard hot-plug MOS tube is switched to a constant current area from a variable resistance area;
s22, the second operational amplifier outputs a low level, the first switch MOS tube is not conducted, the second switch MOS tube is conducted, the power supply starting signal line outputs the low level, and the PSU supplies power to the power utilization module through the main board hot plug MOS tube through the main power supply output line.
10. The method for protecting a server motherboard hot plug control protection circuit as claimed in claim 9, wherein step S3 specifically comprises the following steps:
s31, the reference voltage exceeding the set time period is higher than the grid voltage of the sampled mainboard hot-plug MOS tube, the mainboard hot-plug MOS tube is judged not to be switched to a constant current area from a variable resistance area, and the voltage of the homodromous input end of the second operational amplifier is locked through the voltage of the first diode and the bypass output line;
and S32, the second operational amplifier outputs a high level, the first switch MOS tube is conducted, the second switch MOS tube is not conducted, the power supply starting signal line outputs the high level, the PSU disconnects the voltage output of the main power supply output line, and the mainboard hot plug MOS tube stops supplying power to the power utilization module.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398799A (en) * | 2007-09-30 | 2009-04-01 | 联想(北京)有限公司 | Computer, hot pluggable device and startup method of hot pluggable device |
| CN202121839U (en) * | 2011-06-20 | 2012-01-18 | 上海新进半导体制造有限公司 | Reload decision circuit of switch power supply |
| CN102955718A (en) * | 2011-08-17 | 2013-03-06 | 鸿富锦精密工业（深圳）有限公司 | Server protection system |
| CN103835978A (en) * | 2012-11-26 | 2014-06-04 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN105676978A (en) * | 2015-12-31 | 2016-06-15 | 山东海量信息技术研究院 | Method and device for controlling server fan |
| CN106160708A (en) * | 2015-04-02 | 2016-11-23 | 上海贝尔股份有限公司 | Hardware control circuit and electronic installation thereof |
| JP2017016979A (en) * | 2015-07-06 | 2017-01-19 | トキコーポレーション株式会社 | Hot-swap protection circuit, and constant current power supply device |
| CN111258403A (en) * | 2020-02-10 | 2020-06-09 | 苏州浪潮智能科技有限公司 | Control device for centralized power supply of server |
| CN211239320U (en) * | 2020-02-18 | 2020-08-11 | 山东超越数控电子股份有限公司 | Hot plug control circuit with thermal protection function |
-
2021
- 2021-10-27 CN CN202111256560.XA patent/CN114003539B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398799A (en) * | 2007-09-30 | 2009-04-01 | 联想(北京)有限公司 | Computer, hot pluggable device and startup method of hot pluggable device |
| CN202121839U (en) * | 2011-06-20 | 2012-01-18 | 上海新进半导体制造有限公司 | Reload decision circuit of switch power supply |
| CN102955718A (en) * | 2011-08-17 | 2013-03-06 | 鸿富锦精密工业（深圳）有限公司 | Server protection system |
| CN103835978A (en) * | 2012-11-26 | 2014-06-04 | 鸿富锦精密工业（深圳）有限公司 | Fan control circuit |
| CN106160708A (en) * | 2015-04-02 | 2016-11-23 | 上海贝尔股份有限公司 | Hardware control circuit and electronic installation thereof |
| JP2017016979A (en) * | 2015-07-06 | 2017-01-19 | トキコーポレーション株式会社 | Hot-swap protection circuit, and constant current power supply device |
| CN105676978A (en) * | 2015-12-31 | 2016-06-15 | 山东海量信息技术研究院 | Method and device for controlling server fan |
| CN111258403A (en) * | 2020-02-10 | 2020-06-09 | 苏州浪潮智能科技有限公司 | Control device for centralized power supply of server |
| CN211239320U (en) * | 2020-02-18 | 2020-08-11 | 山东超越数控电子股份有限公司 | Hot plug control circuit with thermal protection function |
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