CN117707312A - Server system and power supply circuit of fan thereof - Google Patents
Server system and power supply circuit of fan thereof Download PDFInfo
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- CN117707312A CN117707312A CN202311716362.6A CN202311716362A CN117707312A CN 117707312 A CN117707312 A CN 117707312A CN 202311716362 A CN202311716362 A CN 202311716362A CN 117707312 A CN117707312 A CN 117707312A
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- 239000003990 capacitor Substances 0.000 claims description 28
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- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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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 discloses a server system and a power supply circuit of a fan of the server system. The power supply circuit comprises a fan connector and a slow start protection module, wherein at least one connecting end of the fan connector feeds back a fan in-place signal; the slow start protection module comprises a power switch unit, a delay unit, a first-stage control unit and a second-stage control unit; the power switch unit outputs the power supply voltage of the board end fan as a slow start power supply voltage in a conducting state; the control end of the power switch unit is electrically connected with the second-stage control unit, the control end of the power switch unit is electrically connected with the delay unit, and the second-stage control unit and the delay unit jointly control the working state of the power switch unit; the control end of the second-stage control unit is electrically connected with the first-stage control unit, and the first-stage control unit responds to the fan in-place signal to control the working state of the second-stage control unit. The invention reduces the surge current and surge voltage generated by the electric heating plug of the fan belt and reduces the damage probability of the fan.
Description
Technical Field
The present invention relates to the field of server technologies, and in particular, to a server system and a power supply circuit of a fan thereof.
Background
With the continuous development of server technology, the heat dissipation modes adopted by the server are diversified, such as air cooling heat dissipation and liquid cooling heat dissipation. However, the cooling policy of the server main stream is also air cooling. The main heat dissipation component adopted by the air cooling heat dissipation scheme in the server is a fan, and the fan is used for dissipating heat of main chips and components in the server. In the use process of the server, the fan is required to be replaced or maintained under the condition that the system is not powered off and is not powered off, so that the fan is required to establish the power supply voltage before hot plug. However, the hot plug can cause the fan to generate larger surge current and surge voltage, which is easy to damage the fan and affects the working stability of the server system.
Disclosure of Invention
The invention provides a server system and a power supply circuit of a fan thereof, which are used for reducing surge current and surge voltage generated by electric heating plug of a fan belt, reducing the damage probability of the fan and improving the working stability of the server system.
According to an aspect of the present invention, there is provided a power supply circuit of a fan of a server system, including:
a fan connector comprising a plurality of connection ends; at least one connecting end feeds back an in-place signal of the fan, and at least one connecting end receives a slow start power supply voltage;
the slow start protection module receives the fan in-place signal and the board-end fan power supply voltage and provides the slow start power supply voltage for the fan connector;
the slow start protection module comprises a power switch unit, a delay unit, a first-stage control unit and a second-stage control unit; the power switch unit outputs the power supply voltage of the board end fan as the slow start power supply voltage in a conducting state; the second-stage control unit and the delay unit jointly control the working state of the power switch unit; the first-stage control unit responds to the fan in-place signal to control the working state of the second-stage control unit.
Optionally, the control end of the first-stage control unit receives the fan on-site signal; the control end of the second-stage control unit is electrically connected with the output end of the first-stage control unit; the control end of the power switch unit is electrically connected with the output end of the second-stage control unit, and the control end of the power switch unit is electrically connected with the delay unit. The arrangement is beneficial to the step-by-step control of the power switch unit by the first-stage control unit and the second-stage control unit and the delay control of the power switch unit by the delay unit.
Optionally, the first stage control unit includes:
the grid electrode of the first transistor is connected with the fan in-place signal, the first electrode of the first transistor is connected with a first level voltage through a first resistor, and the second electrode of the first transistor is grounded; a first pole of the first transistor is used as an output end of the first-stage control unit;
and the first end of the second resistor is electrically connected with the grid electrode of the first transistor, and the second end of the second resistor is connected with the first level voltage.
The circuit is simple in structure and easy to realize.
Optionally, the first stage control unit further includes:
the first voltage stabilizing diode is electrically connected with the grid electrode of the first transistor, and the second electrode of the first voltage stabilizing diode is grounded.
The first voltage stabilizing diode can stabilize the grid voltage of the first transistor, and is beneficial to improving the voltage stability of the first-stage control unit.
Optionally, the second stage control unit includes:
and the grid electrode of the second transistor is electrically connected with the output end of the first-stage control unit, the first electrode of the second transistor is connected to the output end of the second-stage control unit through a third resistor, and the second electrode of the second transistor is grounded.
The circuit is simple in structure and easy to realize.
Optionally, the second-stage control unit further includes:
the fourth resistor is connected in series between the output end of the first-stage control unit and the grid electrode of the second transistor;
the first end of the fifth resistor is electrically connected with the output end of the first-stage control unit, and the second end of the fifth resistor is grounded;
and the first end of the first capacitor is electrically connected with the grid electrode of the second transistor, and the second end of the first capacitor is grounded.
The fourth resistor, the fifth resistor and the first capacitor form an RC circuit, which is beneficial to filtering signals output by the first-stage control unit and improving the stability of the circuit.
Optionally, the power switch unit includes:
a third transistor, a gate of which is electrically connected to an output terminal of the second stage control unit, a first pole of which is used as an output terminal of the power switch unit, and a second pole of which is connected to the board-side fan supply voltage;
a sixth resistor, a first end of which is electrically connected to the gate of the third transistor, and a second end of which is electrically connected to the second electrode of the third transistor;
the delay unit includes: and a second capacitor, wherein a first end of the second capacitor is electrically connected with the gate electrode of the third transistor, and a second end of the second capacitor is grounded.
The circuit is simple in structure and easy to realize.
Optionally, the power supply circuit of the fan of the server system further includes:
the fluctuation suppression protection module is connected in series between the output end of the slow start protection module and the fan connector; the ripple suppression protection module is used for suppressing instantaneous current and voltage ripple.
The setting like this for fan connector received slowly plays power supply voltage for the voltage that the fluctuation suppression protection module carried out output after the fluctuation suppression to slowly starting protection module for fan connector received voltage is more stable, is favorable to promoting circuit stability.
Optionally, the working principle of the power supply circuit includes:
if the fan in-place signal fed back by the fan connector is at a first level, the fan in-place signal controls the first-stage control unit to output a first control signal, and the first control signal is at a second level; the first control signal controls the second-stage control unit to be turned off; the control end of the power switch unit maintains a first level and is in a cut-off state;
if the fan in-place signal fed back by the fan connector is at a second level, the fan in-place signal controls the first-stage control unit to output a first control signal, and the first control signal is at the first level; the first control signal controls the second-stage control unit to be conducted; under the common control of the delay unit and the second-stage control unit, the voltage of the control end of the power switch unit is changed from a first level to a second level in a set time period, so as to control the power switch unit to delay on.
The technical scheme of delaying power supply to the fan is realized, and the control is stable and easy to realize.
According to another aspect of the present invention, there is provided a server system including: server, fan and power supply circuit of fan according to any embodiment of the present invention.
The embodiment of the invention adds a slow start protection module in a power supply circuit of a fan of a server system, wherein the slow start protection module comprises a power switch unit, a delay unit, a first-stage control unit and a second-stage control unit; and the fan in-place signal is used for enabling the slow start protection module, and specifically the fan in-place signal is used for controlling the first-stage control unit, the second-stage control unit, the delay unit and the power switch unit step by step. The fan connector is powered by the slow start protection module after the fan is stably inserted into the fan connector, so that hot plug of the fan is facilitated, the damage probability of the fan is reduced, the use safety of the fan is improved, and the working stability of a server system is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a power supply circuit of a fan of a server system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a soft start protection module according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a working process of a power supply circuit of a fan of a server system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another soft start protection module according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a soft start protection module according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a power supply circuit of a fan of another server system according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a surge suppression protection module according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a power supply circuit of a fan of another server system according to an embodiment of the present invention;
FIG. 9 is a graph of actual waveforms of a comparative example provided in an embodiment of the present invention;
fig. 10 is a waveform diagram of actual power supply measurement of a power supply circuit of a fan of a server system according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of a power supply circuit of a fan of a server system according to an embodiment of the present invention. Referring to fig. 1, a power supply circuit of a fan of the server system includes:
a fan connector 100, the fan connector 100 including a plurality of connection ends; wherein at least one connection (e.g., feedback connection 110) feeds back a fan on-position signal, at least one connection (e.g., power connection 120) receives a slow start supply voltage;
the slow start protection module 200, the slow start protection module 200 receives the fan in-place signal and the board-end fan power supply voltage, and provides the slow start power supply voltage for the fan connector 100; i.e. the soft start protection module 200 is connected in series between the power supply lines.
Fig. 2 is a schematic diagram of a soft start protection module according to an embodiment of the present invention. Referring to fig. 2, the soft start protection module 200 includes a power switch unit 210, a delay unit 220, a first stage control unit 230, and a second stage control unit 240.
The power switch unit 210 outputs the panel end FAN supply voltage p226v_fan as the slow start supply voltage p436v_fan1_l in the on state; the control end of the power switch unit 210 is electrically connected with the second-stage control unit 240, and the control end of the power switch unit 210 is electrically connected with the delay unit 220, and the second-stage control unit 240 and the delay unit 220 jointly control the working state of the power switch unit 210; the control terminal of the second stage control unit 240 is electrically connected to the first stage control unit 230, and the first stage control unit 230 controls the operation state of the second stage control unit 240 in response to the FAN in-place signal fan1_en_n.
Fig. 3 is a schematic diagram illustrating a working process of a power supply circuit of a fan of a server system according to an embodiment of the present invention. With reference to fig. 1-3, optionally, the operating principle of the power supply circuit includes:
if the FAN in-place signal fan1_en_n fed back by the FAN connector 100 is at the first level, the FAN in-place signal fan1_en_n controls the first stage control unit 230 to output the first control signal, and the first control signal is at the second level; the first control signal controls the second stage control unit 240 to be turned off; the control terminal of the power switch unit 210 maintains the first level and is in an off state;
if the FAN in-place signal fan1_en_n fed back by the FAN connector 100 is at the second level, the FAN in-place signal fan1_en_n controls the first stage control unit 230 to output the first control signal, and the first control signal is at the first level; the first control signal controls the second stage control unit 240 to be turned on; under the common control of the delay unit 220 and the second stage control unit 240, the voltage of the control terminal of the power switching unit 210 is changed from the first level to the second level in a set period of time to control the power switching unit to delay on.
The first level and the second level are two levels with opposite level states, and when the first level is a high level, the second level is a low level; when the first level is low, the second level is high. It should be noted that the high level and the low level are relatively, and specific voltage values of the high level and the low level output by different circuit units may be different, for example, the high level may be 3.3V, 5V, 12V, 24V or 54V, etc., which is not limited by the present invention. The set period of time is determined according to specific parameters of the delay unit 220.
The working process of the power supply circuit provided by the embodiment of the invention is described by taking the first level as a high level and the second level as a low level, specifically:
after the power-on of the server system, the board-side FAN power supply voltage p24v_fan is in a power-on state, and the FAN on-bit signal fan1_en_n is active low (e.g., 0V). Before the FAN is not plugged into the FAN connector 100, the FAN bit signal FAN1_EN_N is pulled high (e.g., 5V) by default, indicating that the FAN is out of position, and the soft start protection module 200 is in an off state, i.e., the soft start protection module 200 is not activated, the power supply connection 120 of the FAN connector 100 has no power supply voltage, and the FAN is not powered. Thus, when the fan is inserted into the fan connector 100, since the fan connector 100 is in a non-power supply state, no surge current or voltage peak is generated, and no damage is caused to the fan.
Specifically, the principle that the soft start protection module 200 is not started is: when the FAN is not in place, the FAN in-place signal fan1_en_n is pulled high, the first stage control unit 230 is turned on, and a low level is transmitted to the second stage control unit 240, so as to control the second stage control unit 240 to be in an off state, and at this time, the voltage p24v_fan1_g is a high level (for example, 54V), and the power switch unit 210 is controlled to be turned off. The fan connector 100 is not powered.
The in-place signal pin inside the FAN is grounded, and when the FAN is inserted into the FAN connector 100, the in-place signal pin is turned on, so that the FAN in-place signal FAN1_EN_N can be pulled down. The FAN in-place signal fan1_en_n is used as an enable signal of the soft start protection module 200, when the FAN in-place signal fan1_en_n is pulled down, the soft start protection module 200 operates, similar to the switch being turned on, to transmit the board-side FAN supply voltage p55v_fan to the supply connection terminal 120 of the FAN connector 100, and the voltage connected to the supply connection terminal 120 is named soft start supply voltage p55v_fan1_l.
Specifically, the principle of the start-up of the soft start protection module 200 is: when the FAN is inserted into the FAN connector 100 and the FAN is in place, the FAN in-place signal FAN1_EN_N is pulled down by the internal ground of the FAN, the first stage control unit 230 is turned off, the high level is transmitted to the second stage control unit 240, the second stage control unit 240 is controlled to be turned on, and the voltage P54V_FAN1_G is raised. But due to the delay unit 220, the voltage p54v_fan1_g slowly rises, thereby controlling the power switching unit 210 to delay the start-up. The start-up time of the slow start supply voltage p24v_fan1_l is adapted by adjusting the parameters of the delay unit 220. After the power switching unit 210 is stably turned on, power can be supplied to the fan.
Therefore, in the embodiment of the present invention, a soft start protection module 200 is added in the power supply circuit of the fan of the server system, and the soft start protection module 200 includes a power switch unit 210, a delay unit 220, a first stage control unit 230 and a second stage control unit 240; and sets the slow start protection module 200 to be enabled by the FAN in-place signal fan1_en_n, specifically, the FAN in-place signal fan1_en_n controls the first stage control unit 230, the second stage control unit 240, the delay unit 220 and the power switch unit step by step. The arrangement is beneficial to avoiding the problems of surge current, surge voltage, voltage peak and the like generated by the power supply of the fan when the fan is inserted into the fan connector 100, ensuring that the fan connector 100 is powered by the slow start protection module 200 after the fan is stably inserted into the fan connector 100, thereby being beneficial to hot plug of the fan, reducing the damage probability of the fan, improving the use safety of the fan and improving the working stability of a server system.
In the above embodiments, the arrangement of the units is various, and several of them are described below, but the present invention is not limited thereto.
Fig. 4 is a schematic diagram of another soft start protection module according to an embodiment of the present invention. Referring to fig. 4, in one embodiment of the present invention, optionally, the first stage control unit 230 includes:
a first transistor PQ15, a gate G of the first transistor PQ15 is connected to the FAN bit signal fan1_en_n, a first pole (e.g., drain D) of the first transistor PQ15 is connected to the first level voltage p3v3_stby through a first resistor PR31, and a second pole (e.g., source S) of the first transistor PQ15 is grounded; a first pole of the first transistor PQ15 serves as an output terminal of the first stage control unit 230; the first level voltage p3v3_stby may be, for example, a high level voltage of 3.3V; illustratively, the first transistor PQ15 is NMOS;
and a second resistor PR32, wherein a first end of the second resistor PR32 is electrically connected with the gate G of the first transistor PQ15, and a second end of the second resistor PR32 is connected with the first level voltage P3V3_STBY.
Illustratively, the first stage control unit 230 operates on the following principles: when the FAN is not in place, the FAN in-place signal FAN1_EN_N is pulled high, controlling the first transistor PQ15 to be turned on, and the voltage of the drain electrode D of the first transistor PQ15 is pulled low, so that a low-level voltage is output; after the FAN is inserted into the FAN connector 100, the FAN bit signal fan1_en_n is pulled down by the FAN internal ground, and the first transistor PQ15 is controlled to be turned off, and the voltage of the drain D of the first transistor PQ15 is close to the first level voltage p3v3_stby of 3.3V, thereby outputting a high level voltage.
The type of the first transistor PQ15 and the setting of the first level voltage p3v3_stby may be adjusted as needed in practical applications, and the present invention is not limited thereto.
With continued reference to fig. 4, on the basis of the above embodiments, optionally, the first stage control unit 230 further includes:
the first zener diode PED5, the first pole of the first zener diode PED5 is electrically connected to the gate G of the first transistor PQ15, and the second pole of the first zener diode PED5 is grounded. The first zener diode PED5 is used to stabilize the gate voltage of the first transistor PQ 15.
The first stage control unit 230 provided by the embodiment of the invention comprises a first transistor PQ15, a first resistor PR31, a second resistor PR32 and a first zener diode PED5, and has a simple circuit structure, stable performance and easy implementation.
With continued reference to fig. 4, in one embodiment of the present invention, the second stage control unit 240 optionally includes: the second transistor PQ14, a gate (e.g., pin number 1) of the second transistor PQ14 is electrically connected to the output terminal of the first stage control unit 230, a first pole (e.g., pin number 3) of the second transistor PQ14 is connected to the output terminal of the second stage control unit 240 through a third resistor PR29, and a second pole (e.g., pin number 2) of the second transistor PQ14 is grounded. The second transistor PQ14 is illustratively NMOS. The second stage control unit 240 is provided in such a manner that it is simple in structure and easy to implement.
With continued reference to fig. 4, in one embodiment of the invention, optionally, the power switch unit 210 includes:
a third transistor PQ3, wherein a gate G of the third transistor PQ3 is electrically connected to the output terminal of the second stage control unit 240, a first pole (e.g., a drain D) of the third transistor PQ3 is used as the output terminal of the power switch unit 210, and a second pole (e.g., a source S) of the third transistor PQ3 is connected to the board-side FAN supply voltage p24v_fan; illustratively, the third transistor PQ3 is PMOS;
a sixth resistor PR28, a first end of the sixth resistor PR28 being electrically connected to the gate G of the third transistor PQ3, a second end of the sixth resistor PR28 being electrically connected to a second pole (e.g., source S) of the third transistor PQ 3;
the delay unit 220 includes: and a second capacitor PC21, a first end of the second capacitor PC21 is electrically connected to the gate G of the third transistor PQ3, and a second end of the second capacitor PC21 is grounded.
Illustratively, the operating principle of the soft start protection module 200 is: when the FAN is not in place, the FAN in place signal FAN1_EN_N is pulled high, the first transistor PQ15 is turned on, and the drain D thereof outputs a low level. The low level controls the second transistor PQ14 to be turned off, the second transistor PQ14 is turned off, and at this time, the voltage p22v_fan1_g is a high level close to the board-side FAN power supply voltage p54v_fan (for example, 54V), and the third transistor PQ3 is turned off. The power connection of the fan connector 100 is not present.
When the FAN is inserted into the FAN connector 100, the FAN bit signal FAN1_en_n is pulled down by the FAN internal ground, the first transistor PQ15 is turned off, and the drain D thereof outputs a high level. The high level controls the second transistor PQ14 to be turned on. At this time, the voltage p54v_fan1_g increases under the action of the board-side FAN power supply voltage p54v_fan, however, since the voltage of the second capacitor PC21 cannot be suddenly changed, the voltage p54v_fan1_g slowly increases until the voltage p54v_fan1_g is stabilized to a voltage divided by the sixth resistor PR28 and the third resistor PR29, for example, 45V, the gate-source voltage difference VGS of the third transistor PQ3 is about-10V, and the third transistor PQ3 is stably turned on, thereby supplying power to the FAN. The capacitance value of the second capacitor PC21 can be adjusted according to specific requirements to adapt to the required voltage starting time and optimize the starting current.
Fig. 5 is a schematic diagram of a soft start protection module according to another embodiment of the present invention. Referring to fig. 5, the second stage control unit 240 may further include, on the basis of the above embodiments:
a fourth resistor PR30, the fourth resistor PR30 being connected in series between an output terminal of the first stage control unit 230 (e.g., a drain D of the first transistor PQ 15) and a gate of the second transistor PQ 14;
a fifth resistor PR34, a first end of the fifth resistor PR34 being electrically connected to an output end (e.g., a drain D of the first transistor PQ 15) of the first stage control unit 230, a second end of the fifth resistor PR34 being grounded;
the first capacitor PC12, a first end of the first capacitor PC12 is electrically connected to the gate of the second transistor PQ14, and a second end of the first capacitor PC12 is grounded.
The fourth resistor PR30, the fifth resistor PR34 and the first capacitor PC12 are configured to filter the voltage output by the first transistor PQ15, so that the voltage received by the gate of the second transistor PQ14 is more stable.
Fig. 6 is a schematic diagram of a power supply circuit of a fan of another server system according to an embodiment of the present invention. Referring to fig. 6, on the basis of the above embodiments, optionally, the power supply circuit further includes:
the surge suppression protection module 300, the surge suppression protection module 300 is connected in series between the output end of the slow start protection module 200 and the fan connector 100; the ripple suppression protection module 300 is used to suppress transient current and voltage ripple.
In the embodiment of the invention, the fluctuation suppression protection module 300 is arranged between the rear end power supply of the slow start protection module 200 and the fan connector 100, and a layer of protection is added for the power supply circuit, so that the stability of the power supply voltage of the fan is further improved, and the voltage fluctuation in the operation process of the fan is reduced.
Fig. 7 is a schematic diagram of a surge suppression protection module according to an embodiment of the present invention. Referring to fig. 7, optionally, on the basis of the above embodiments, the surge suppression protection module 300 includes:
the first end of the first inductor PL5 is electrically connected with the output end of the slow start protection module 200, and is connected with the slow start power supply voltage p24v_fan1_l; a second end of the first inductor PL5 is electrically connected to the FAN connector 100, and supplies a voltage p24v_fan 1 to the FAN connector 100;
the second end of the first inductor PL5 is grounded through the seventh resistor PR40, the third capacitor PEC9 and the fourth capacitor PEC10 which are connected in parallel; illustratively, the third and fourth capacitances PEC9 and PEC10 are polar capacitances.
The surge suppression protection module 300 is an LC filter circuit, and the inductive characteristic of the first inductor PL5 can effectively suppress abrupt changes of current and prevent peak current from occurring; the third capacitor PEC9 and the fourth capacitor PEC10 at the rear end of the first inductor PL5 play a role in stabilizing voltage, which is beneficial to ensuring the stability of the power supply voltage of the fan. The surge suppression protection module 300 is arranged in this way, and has a simple circuit structure and is easy to implement.
It should be noted that, in fig. 7, two capacitors are exemplarily shown in the surge suppression protection module 300, and the present invention is not limited thereto, and in other embodiments, the number of capacitors and the capacity of the capacitors may be adjusted as needed.
Fig. 8 is a schematic diagram of a power supply circuit of a fan of a server system according to another embodiment of the present invention. Referring to fig. 8, on the basis of the above embodiments, optionally, the power supply circuit further includes:
the hot plug protection module 400, the hot plug protection module 400 is electrically connected with the input end of the soft start protection module 200, and the hot plug protection module 400 is used for providing the board end FAN power supply voltage p54v_fan.
The hot plug protection module 400 is located at the forefront of the power supply circuit, and the hot plug protection module 400 is used for performing power supply time sequence control and providing corresponding protection measures, such as overcurrent protection, overvoltage protection, short circuit protection and the like.
On the basis of the above embodiments, optionally, an electronic fuse is further provided on the power supply line, and the electronic fuse is connected in series with the power switch unit 210 (for example, the third transistor). The power switch unit 210 isolates the power supply line, the electronic fuse performs overcurrent control on the power supply line, and the electronic fuse and the power switch unit 210 form a double-layer protection measure.
In summary, the embodiment of the invention can protect the fan in the server system, reduce the damage probability of the fan and improve the working stability of the server system. Specifically, under the system power-on running condition, the fan connector power supply state is controlled, so that damage during hot plug maintenance of the fan is avoided, and the effect of protecting the fan is achieved. The circuit provided by the embodiment of the invention has the advantages of simple structure, flexible replacement of components, wide application scene adaptation, flexible and convenient application and cost control realization. By way of example, only part of devices in the power supply circuit need to be replaced, so that the requirements of fans of different models can be adapted to meet the requirements of different power supply loads.
Experiment verification is carried out according to the technical scheme provided by the embodiment of the invention. Fig. 9 is a diagram showing actual waveforms of a comparative example according to an embodiment of the present invention. Waveforms L1 and L2 in fig. 9 are waveforms actually measured without the soft start protection module; the waveform L1 is a power supply voltage of the fan connector end, and the waveform L2 is a power supply current. As shown in fig. 9, the rated voltage is 54V, and the rated current is 5A; at the time of hot plug of the fan, the voltage of the waveform L1 is at most flushed to 86.425V, and there is 130A of surge current. It follows that there is a greater risk of damage to the fan in the case of 54V power. This is because, if the soft start protection module is not provided, when the fan is hot-plugged, the fan is plugged into the fan connector because the fan connector is in a charged state, and the capacitor and the like in the fan are charged when the fan is in contact with the fan connector, so that voltage overshoot and current overshoot are caused, and damage to the fan is caused.
Fig. 10 is a waveform diagram of actual power supply measurement of a power supply circuit of a fan of a server system according to an embodiment of the present invention. Waveforms L1 and L2 in fig. 10 are waveforms actually measured by a soft start protection module provided in a power supply circuit. As shown in fig. 10, the voltage overshoot disappears and the current is only 15A spikes at the time of fan hot plug. Compared with the scheme without adding the slow start protection module, the peak value of the power supply voltage of the fan end is reduced by 35.2%, the peak value of the current is reduced by 87.8%, and a very good protection effect is achieved on the fan.
The embodiment of the invention also provides a server system, which comprises: the technical principle and the generated effect of the server, the fan and the power supply circuit of the fan provided by any embodiment of the invention are similar, and are not repeated.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A power supply circuit for a fan of a server system, comprising:
a fan connector comprising a plurality of connection ends; at least one connecting end feeds back an in-place signal of the fan, and at least one connecting end receives a slow start power supply voltage;
the slow start protection module receives the fan in-place signal and the board-end fan power supply voltage and provides the slow start power supply voltage for the fan connector;
the slow start protection module comprises a power switch unit, a delay unit, a first-stage control unit and a second-stage control unit; the power switch unit outputs the power supply voltage of the board end fan as the slow start power supply voltage in a conducting state; the second-stage control unit and the delay unit jointly control the working state of the power switch unit; the first-stage control unit responds to the fan in-place signal to control the working state of the second-stage control unit.
2. The power supply circuit of a fan of a server system according to claim 1, wherein,
the control end of the first-stage control unit receives the fan on-site signal;
the control end of the second-stage control unit is electrically connected with the output end of the first-stage control unit;
the control end of the power switch unit is electrically connected with the output end of the second-stage control unit, and the control end of the power switch unit is electrically connected with the delay unit.
3. The power supply circuit of a fan of a server system according to claim 2, wherein the first stage control unit includes:
the grid electrode of the first transistor is connected with the fan in-place signal, the first electrode of the first transistor is connected with a first level voltage through a first resistor, and the second electrode of the first transistor is grounded; a first pole of the first transistor is used as an output end of the first-stage control unit;
and the first end of the second resistor is electrically connected with the grid electrode of the first transistor, and the second end of the second resistor is connected with the first level voltage.
4. A power supply circuit for a fan of a server system according to claim 3, wherein the first stage control unit further comprises:
the first voltage stabilizing diode is electrically connected with the grid electrode of the first transistor, and the second electrode of the first voltage stabilizing diode is grounded.
5. The power supply circuit of a fan of a server system according to claim 2, wherein the second stage control unit includes:
and the grid electrode of the second transistor is electrically connected with the output end of the first-stage control unit, the first electrode of the second transistor is connected to the output end of the second-stage control unit through a third resistor, and the second electrode of the second transistor is grounded.
6. The power supply circuit of a fan of a server system according to claim 5, wherein the second stage control unit further comprises:
the fourth resistor is connected in series between the output end of the first-stage control unit and the grid electrode of the second transistor;
the first end of the fifth resistor is electrically connected with the output end of the first-stage control unit, and the second end of the fifth resistor is grounded;
and the first end of the first capacitor is electrically connected with the grid electrode of the second transistor, and the second end of the first capacitor is grounded.
7. The power supply circuit of a fan of a server system according to claim 2, wherein the power switching unit includes:
a third transistor, a gate of which is electrically connected to an output terminal of the second stage control unit, a first pole of which is used as an output terminal of the power switch unit, and a second pole of which is connected to the board-side fan supply voltage;
a sixth resistor, a first end of which is electrically connected to the gate of the third transistor, and a second end of which is electrically connected to the second electrode of the third transistor;
the delay unit includes: and a second capacitor, wherein a first end of the second capacitor is electrically connected with the gate electrode of the third transistor, and a second end of the second capacitor is grounded.
8. The power supply circuit of a fan of a server system according to claim 2, further comprising:
the fluctuation suppression protection module is connected in series between the output end of the slow start protection module and the fan connector; the ripple suppression protection module is used for suppressing instantaneous current and voltage ripple.
9. The power supply circuit of a fan of a server system according to claim 1, wherein the operating principle of the power supply circuit includes:
if the fan in-place signal fed back by the fan connector is at a first level, the fan in-place signal controls the first-stage control unit to output a first control signal, and the first control signal is at a second level; the first control signal controls the second-stage control unit to be turned off; the control end of the power switch unit maintains a first level and is in a cut-off state;
if the fan in-place signal fed back by the fan connector is at a second level, the fan in-place signal controls the first-stage control unit to output a first control signal, and the first control signal is at the first level; the first control signal controls the second-stage control unit to be conducted; under the common control of the delay unit and the second-stage control unit, the voltage of the control end of the power switch unit is changed from a first level to a second level in a set time period, so as to control the power switch unit to delay on.
10. A server system, comprising: server, fan and power supply circuit of a fan according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311716362.6A CN117707312A (en) | 2023-12-13 | 2023-12-13 | Server system and power supply circuit of fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311716362.6A CN117707312A (en) | 2023-12-13 | 2023-12-13 | Server system and power supply circuit of fan thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117707312A true CN117707312A (en) | 2024-03-15 |
Family
ID=90150998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311716362.6A Pending CN117707312A (en) | 2023-12-13 | 2023-12-13 | Server system and power supply circuit of fan thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117707312A (en) |
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2023
- 2023-12-13 CN CN202311716362.6A patent/CN117707312A/en active Pending
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