Power supply circuit, power supply method, hard disk controller and redundant power supply system

Abstract

The present application discloses a power supply circuit, a power supply method, a hard disk controller and a redundant power supply system, which relate to the field of electronic circuit technology. The circuit includes: an anti-backflow module, a hot-swap control module, and a voltage conversion module; the first anti-backflow port is electrically connected to the third voltage conversion port, the second anti-backflow port is electrically connected to the first hot-swap control port, the third anti-backflow port is used to output voltage, the second hot-swap control port is electrically connected to the second voltage conversion port, and the first voltage conversion port is connected to the input voltage. When the power supply circuit is working normally, redundant power supply is provided to the electrical appliances; when the power supply circuit needs to be hot-swapped for maintenance, the electrical appliances are powered stably after removal preparation. The power supply circuit, power supply method, hard disk controller and redundant power supply system disclosed in the embodiments of the present application can ensure that the power supply to the electrical appliances is stable during the hot-swap maintenance of the power supply circuit, and improve the maintainability of the power supply circuit.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a power supply circuit, a power supply method, a hard disk controller, and a redundant power supply system. Background Art

[0002] In a storage server, the backplane is used to connect the hard disk and the hard disk controller. Usually, the hard disk is installed on one side of the backplane, such as Figure 1 The hard disk 1, hard disk 2, ..., hard disk M shown in the figure; the hard disk controller is installed on the other side, such as Figure 1 The hard disk controllers shown in the figure are hard disk controllers 1, ..., and N. To meet the heat dissipation requirements of the backplane, as many heat dissipation holes as possible are provided on the backplane, which reduces the area required to accommodate the circuits. Therefore, the hard disk power supply circuit is installed in the hard disk controller, and the voltages output by multiple hard disk controllers are combined on the backplane to form a redundant power supply solution. This allows power to be supplied to each hard disk.

[0003] There's an inevitable voltage difference between the combined voltages. Consequently, current can flow from the hard drive controller with the higher output voltage to the one with the lower output voltage, causing reverse current flow. Furthermore, during hot-swap maintenance of a hard drive controller, when the hard drive controller is removed, the instantaneous switching of the circuit can cause abnormal power supply conditions such as voltage drops and overshoot current, resulting in unstable power supply to the hard drive. Summary of the Invention

[0004] In order to solve the problem of unstable power supply to the hard disk caused by the redundant hard disk controller containing the hard disk power supply circuit during hot plug maintenance, this application provides the following technical solutions:

[0005] In a first aspect, a power supply circuit is provided, comprising: an anti-backflow module, a hot-swap control module, and a voltage conversion module;

[0006] The backflow prevention module has: a first backflow prevention port, a second backflow prevention port, and a third backflow prevention port;

[0007] The hot-swap control module comprises: a first hot-swap control port and a second hot-swap control port;

[0008] The voltage conversion module has: a first voltage conversion port, a second voltage conversion port, and a third voltage conversion port;

[0009] The first anti-backflow port is electrically connected to the third voltage conversion port, the second anti-backflow port is electrically connected to the first hot plug control port, the third anti-backflow port is used to output voltage, the second hot plug control port is electrically connected to the second voltage conversion port, and the first voltage conversion port is connected to the input voltage.

[0010] The power supply circuit is configured to provide redundant power supply to electrical appliances when the power supply circuit is operating normally; when the power supply circuit needs to be hot-swapped for maintenance, the power supply to the electrical appliances is stable after removal preparation.

[0011] Furthermore, the anti-backflow module includes: an anti-backflow controller, an operational amplifier, a comparator, a first transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0012] The backflow prevention controller has: a first port of the backflow prevention controller, a second port of the backflow prevention controller, and a third port of the backflow prevention controller;

[0013] The operational amplifier has: op amp non-inverting input terminal, op amp inverting input terminal, op amp output terminal;

[0014] The comparator has: a comparator non-inverting input terminal, a comparator inverting input terminal, and a comparator output terminal;

[0015] The first transistor comprises: a first transistor first electrode, a first transistor second electrode, and a first transistor third electrode;

[0016] The third pole of the first transistor serves as the first port for preventing backflow, the second pole of the first transistor serves as the third port for preventing backflow, the first pole of the first transistor is electrically connected to the third port of the anti-backflow controller, the first port of the anti-backflow controller is electrically connected to the third pole of the first transistor, the second port of the anti-backflow controller is electrically connected to the second pole of the first transistor, the third pole of the first transistor is electrically connected to the inverting input terminal of the operational amplifier after being connected in series with the first resistor, the inverting input terminal of the operational amplifier is also electrically connected to one end of the second resistor, and the other end of the second resistor is electrically connected to the output terminal of the operational amplifier, the first pole of the first transistor is electrically connected to the non-inverting input terminal of the operational amplifier after being connected in series with the third resistor, the non-inverting input terminal of the operational amplifier is also electrically connected to one end of the fourth resistor, the other end of the fourth resistor is grounded, the output terminal of the operational amplifier is also electrically connected to the non-inverting input terminal of the comparator, the inverting input terminal of the comparator is connected to the reference voltage, and the output terminal of the comparator serves as the second port for preventing backflow.

[0017] Furthermore, the hot-swap control module includes: a complex programmable logic device, a button, and a fifth resistor;

[0018] The complex programmable logic device comprises: a CPLD first port, a CPLD second port, and a CPLD third port;

[0019] The button has: a first button port and a second button port;

[0020] The first port of the CPLD serves as the first hot-swap control port, the second port of the CPLD serves as the second hot-swap control port, the third port of the CPLD is electrically connected to the first port of the button, the second port of the button is grounded, the third port of the CPLD is also electrically connected to one end of the fifth resistor, and the other end of the fifth resistor is connected to the first power supply.

[0021] Furthermore, the complex programmable logic device also has a CPLD fourth port;

[0022] The hot-swap control module further includes: a light-emitting diode, a sixth resistor;

[0023] The fourth port of the CPLD is electrically connected to the anode of the light emitting diode, and the cathode of the light emitting diode is connected in series with a sixth resistor and then grounded.

[0024] Furthermore, the voltage conversion module includes: a first driving circuit, a second transistor, a first diode, a first inductor, and a first capacitor;

[0025] The first driving circuit comprises: a first driving circuit first port and a first driving circuit second port;

[0026] The second transistor comprises: a second transistor first electrode, a second transistor second electrode, and a second transistor third electrode;

[0027] The second electrode of the second transistor serves as the first port for voltage conversion. The third electrode of the second transistor is connected in series with the first inductor and the first capacitor and then grounded. The connection between the first inductor and the first capacitor serves as the third port for voltage conversion. The third electrode of the second transistor is also electrically connected to the cathode of the first diode. The anode of the first diode is grounded. The first electrode of the second transistor is electrically connected to the second port of the first drive circuit. The first port of the first drive circuit serves as the second port for voltage conversion.

[0028] Furthermore, the voltage conversion module includes: a second driving circuit, a second transistor, a third transistor, a first inductor, and a first capacitor;

[0029] The second driving circuit comprises: a second driving circuit first port, a second driving circuit second port, and a second driving circuit third port;

[0030] The second transistor comprises: a second transistor first electrode, a second transistor second electrode, and a second transistor third electrode;

[0031] The third transistor comprises: a third transistor first electrode, a third transistor second electrode, and a third transistor third electrode;

[0032] The second electrode of the second transistor serves as a first port for voltage conversion. The third electrode of the second transistor is connected in series with the first inductor and the first capacitor and then grounded. The connection between the first inductor and the first capacitor serves as a third port for voltage conversion. The third electrode of the second transistor is also electrically connected to the second electrode of the third transistor. The third electrode of the third transistor is grounded. The first electrode of the second transistor is electrically connected to the second port of the second drive circuit. The first electrode of the third transistor is electrically connected to the third port of the second drive circuit. The first port of the second drive circuit serves as a second port for voltage conversion.

[0033] Furthermore, the voltage conversion module includes: a third driving circuit, a fourth transistor, a second diode, a second inductor, and a second capacitor;

[0034] The third driving circuit comprises: a third driving circuit first port and a third driving circuit second port;

[0035] The fourth transistor comprises: a fourth transistor first electrode, a fourth transistor second electrode, and a fourth transistor third electrode;

[0036] The second electrode of the fourth transistor serves as the first port for voltage conversion, the third electrode of the fourth transistor is connected in series with the second inductor and then grounded, the third electrode of the fourth transistor is also electrically connected to the cathode of the second diode, the anode of the second diode serves as the third port for voltage conversion, the anode of the second diode is also connected in series with the second capacitor and then grounded, the first electrode of the fourth transistor is electrically connected to the second port of the third drive circuit, and the first port of the third drive circuit serves as the second port for voltage conversion.

[0037] In a second aspect, a power supply method is provided, which is applied to the power supply circuit described in the first aspect, comprising:

[0038] In response to a pressing force greater than a preset external force on a pressing end of a button in the hot-swap control module, the output voltage of the voltage conversion module is lowered to a preset voltage within a preset time;

[0039] In response to the first transistor in the backflow prevention module being turned off due to a drop in output voltage, the removal preparation is completed.

[0040] In a third aspect, a hard disk controller is provided, comprising the power supply circuit described in the first aspect.

[0041] In a fourth aspect, a redundant power supply system is provided, comprising: a backplane, at least one hard disk, and at least one hard disk controller according to the third aspect;

[0042] The backplane has: a power supply layer, at least one hard disk controller interface, and at least one hard disk interface;

[0043] Any hard disk controller interface of the at least one hard disk controller interface is used to connect to any hard disk controller of the at least one hard disk controller;

[0044] Any hard disk interface of the at least one hard disk interface is used to connect to any hard disk of the at least one hard disk; and the at least one hard disk controller supplies power to the at least one hard disk via the power layer.

[0045] In a fifth aspect, a server is provided, comprising the redundant power supply system described in the fourth aspect.

[0046] The beneficial effects of the technical solution provided by this application are:

[0047] By implementing a power supply circuit, power supply method, hard disk controller and redundant power supply system disclosed in the embodiments of the present application, the power supply circuit can be stably supplied to electrical appliances during hot-swap maintenance, thereby improving the maintainability of the power supply circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 It is a schematic diagram of the backplane connection in a storage server;

[0050] Figure 2 This is a schematic diagram of a power supply circuit module provided in an embodiment of the present application;

[0051] Figure 3 This is a circuit diagram of the anti-backflow module provided in an embodiment of the present application;

[0052] Figure 4 This is a top-down diagram of the pins of the LM5050 chip;

[0053] Figure 5 This is a circuit diagram of a hot-swap control module provided by an embodiment of the present application;

[0054] Figure 6 This is another hot-swap control module circuit diagram provided by an embodiment of the present application;

[0055] Figure 7 This is a schematic diagram of a voltage conversion module circuit provided by an embodiment of the present application;

[0056] Figure 8 This is another circuit diagram of a voltage conversion module provided in an embodiment of the present application;

[0057] Figure 9 This is a schematic diagram of another voltage conversion module circuit provided by an embodiment of the present application;

[0058] Figure 10 This is another circuit diagram of a voltage conversion module provided in an embodiment of the present application;

[0059] Figure 11 This is a schematic diagram of a power supply method provided in an embodiment of the present application;

[0060] Figure 12 This is a schematic diagram of a power supply circuit provided in an embodiment of the present application;

[0061] Figure 13 This is a schematic diagram of a preferred power supply circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0063] It should be noted that, unless otherwise defined, technical or scientific terms used in this application should have the ordinary meanings understood by persons of ordinary skill in the art to which this application belongs. The terms "upper," "lower," "left," and "right" used in this application are defined based on the orientations or positions shown in the accompanying drawings. They are used solely to indicate relative positional relationships and are intended to facilitate the description of this application and simplify the description. When the absolute position of the described object changes, the relative positional relationships may also change accordingly. They do not indicate or imply that the device described must be constructed and operated in a specific orientation and are therefore not to be construed as limiting this application. The terms "first," "second," and similar terms used in this application are used solely for descriptive purposes to distinguish between different components and should not be construed to indicate or imply any order, relative importance, or quantity of the technical features being described. Similarly, in the description of this application, terms such as "a," "an," or "the" do not indicate a limitation on quantity, but rather indicate the presence of at least one. "Multiple" or "several" means two or more, unless otherwise specifically defined. The numbers in the drawings in this specification merely distinguish between functional components or modules and do not indicate the logical relationships between them. Words such as "include" or "comprising" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. Unless otherwise expressly specified and limited, mechanical terms such as "installation" and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; "connection" or "connected" and similar words are not limited to physical or mechanical connections, but can be an electrical connection or a communication connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] Hereinafter, various embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be noted that in the accompanying drawings, the same reference numerals are given to components having substantially the same or similar structures and functions, and repeated descriptions thereof will be omitted.

[0065] To address the problem of false triggering of the electrostatic protection circuit, this application provides the following technical solutions:

[0066] In some embodiments, as Figure 2 As shown, a power supply circuit includes: an anti-backflow module 100, a hot-swap control module 200, and a voltage conversion module 300.

[0067] The backflow prevention module 100 has: a first backflow prevention port 101, a second backflow prevention port 102, and a third backflow prevention port 103; the hot plug control module 200 has: a first hot plug control port 201, a second hot plug control port 202; the voltage conversion module 300 has: a first voltage conversion port 301, a second voltage conversion port 302, and a third voltage conversion port 303.

[0068] The first anti-backflow port 101 is electrically connected to the third voltage conversion port 303, the second anti-backflow port 102 is electrically connected to the first hot plug control port 201, the third anti-backflow port 103 is used to output voltage, the second hot plug control port 202 is electrically connected to the second voltage conversion port 302, and the first voltage conversion port 301 is connected to the input voltage V IN .

[0069] The above power supply circuit is suitable for electronic equipment with redundant design, such as storage servers, redundant power supply equipment, etc. Input voltage V IN The power supply circuit is input by the voltage conversion first port 301, converted into the working voltage of the corresponding electronic device (such as a hard disk) by the voltage conversion module 300, and then output by the voltage conversion third port 303. The anti-backflow third port 103 is connected to the power bus, or the power plane in the board or backplane, to supply power to the corresponding electronic device. The anti-backflow module 100 has the function of preventing current backflow. That is, when the voltage output by the voltage conversion third port 303 is not less than the power bus, or the voltage of the power plane in the board or backplane, the voltage is output to the power bus, or the board or backplane through the anti-backflow third port 103; when the voltage output by the voltage conversion third port 303 is less than the voltage of the power bus, or the voltage of the power plane in the board or backplane, the power bus, or the board or backplane is blocked from outputting voltage to the power supply circuit.

[0070] The power supply circuit is configured to provide redundant power to electrical appliances when the power supply circuit is operating normally. During normal operation, the power supply circuit also has a backflow prevention function. When a power supply circuit requires hot-swap maintenance, after removal preparation, the voltage of the corresponding power supply circuit to be maintained slowly decreases over a preset time, allowing the remaining redundant power supply circuit to take over powering the electrical appliance, ensuring a stable power supply to the appliance.

[0071] The anti-backflow module 100 allows the current to flow in the forward direction, and the forward direction of the current is the direction of the current flowing from the anti-backflow first port 101 to the anti-backflow third port 103. Figure 3 As shown, it includes: an anti-backflow controller 110, an operational amplifier 120, a comparator 130, a first transistor T1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.

[0072] The backflow prevention controller 110 includes: a first port 111, a second port 112, and a third port 113. The backflow prevention controller 110 is configured such that when the voltage received by the first port 111 is not less than the voltage received by the second port 112, the third port 113 controls the first transistor T1 to turn on, and the third port 103 outputs the voltage received by the first port 101; when the voltage received by the first port 111 is less than the voltage received by the second port 112, the third port 113 controls the first transistor T1 to turn off, thereby preventing the voltage of the third port 103 from flowing back into the voltage conversion module 300.

[0073] Preferably, the backflow prevention controller 110 uses the LM5050 chip of Texas Instruments. The LM5050 has a "VS" pin, a "GND" pin, an "OFF" pin, an "OUT" pin, a "GATE" pin, and an "IN" pin. Accordingly, the "IN" pin of the chip serves as the first port 111 of the backflow prevention controller, the "OUT" pin of the chip serves as the second port 112 of the backflow prevention controller, and the "GATE" pin of the chip serves as the third port 113 of the backflow prevention controller. The top view of the pins of the LM5050 is shown in FIG. Figure 4 shown.

[0074] Schematically, the first transistor T1 may be a P-channel enhancement type MOSFET. Accordingly, the first electrode T 11 is the gate, the second electrode T of the first transistor 12 is the source, the third electrode T 13 Controls the conduction or shutoff of the first transistor T1, that is, controls the first electrode T of the first transistor 11The voltage of the first transistor T 11 , the third electrode T of the first transistor 13 The voltage difference between the two is related to the threshold voltage of the first transistor T1, thereby realizing the turning on or off of the first transistor T1. The turning on or off principle of the transistor is not described in detail here.

[0075] The operational amplifier 120 has: an operational amplifier non-inverting input terminal 121, an operational amplifier inverting input terminal 122, and an operational amplifier output terminal 123; the comparator 130 has: a comparator non-inverting input terminal 131, a comparator inverting input terminal 132, and a comparator output terminal 133; the first transistor T1 has: a first transistor first electrode T 11 , the second electrode T of the first transistor 12 , the third electrode T of the first transistor 13 .

[0076] The third electrode T of the first transistor 13 As the first port 101 for preventing backflow, the second electrode T of the first transistor 12 As the third anti-backflow port 103, the first transistor first electrode T 11 The first port 111 of the anti-backflow controller is electrically connected to the third terminal 113 of the anti-backflow controller, and the third terminal 111 of the first transistor is electrically connected to the third terminal 113 of the anti-backflow controller. 13 The second port 112 of the anti-backflow controller is electrically connected to the second electrode T of the first transistor. 12 Electrically connected, the first transistor third electrode T 13 The first resistor R1 is connected in series with the inverting input terminal 122 of the operational amplifier, and the inverting input terminal 122 of the operational amplifier is also electrically connected to one end of the second resistor R2. The other end of the second resistor R2 is electrically connected to the output terminal 123 of the operational amplifier. 11 The third resistor R3 is connected in series with the op amp non-inverting input terminal 121, which is also electrically connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is grounded. The op amp output terminal 123 is also electrically connected to the comparator non-inverting input terminal 131. The comparator inverting input terminal 132 is connected to the reference voltage V REF The comparator output terminal 133 serves as the second anti-backflow port 102 .

[0077] The operational amplifier 120 converts the gate-source voltage V GS After conversion, it is sent to the comparator non-inverting input terminal 131 and the reference voltage V connected to the comparator inverting input terminal 132. REF Compare. It is used to indicate whether the first transistor T1 is turned on. The gate-source voltage after conversion is:

[0078]

[0079] Among them, V′GS is the gate-source voltage of the first transistor after conversion by the operational amplifier 120, R1 is the resistance of the first resistor, R2 is the resistance of the second resistor, R3 is the resistance of the third resistor, and R4 is the resistance of the fourth resistor (the resistance values ​​of the resistors are indicated in italics to distinguish them from the reference numerals indicated in regular font, for example, R1 is the resistance of the first resistor R1), V G is the first-electrode voltage of the first transistor, V S The resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor can be set by those skilled in the art according to actual conditions and are not limited in this application.

[0080] Preferably, the reference voltage V REF The value of can be set to the threshold voltage of the first transistor, such as 1.5V. When the voltage value received by the comparator non-inverting input terminal 131 is greater than 1.5V, it indicates that the first transistor T1 is turned on; otherwise, it indicates that the first transistor T1 is turned off. REF The polarity is set according to the type of the first transistor T1; the reference voltage V REF The specific value of can be set in combination with the resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor, and the threshold voltage of the first transistor, and is not limited in this application.

[0081] The comparator output terminal 133 outputs a logic level for indicating the on or off state of the first transistor T1. Schematically, a low level indicates that the first transistor T1 is off, and a high level indicates that the first transistor T1 is on.

[0082] Taking the redundant power supply circuit for the hard disk of the storage server as an example, when the hard disk controller is hot-swapped for maintenance, it takes some time for other redundant power supply circuits to take over the power supply of the removed hard disk controller. This will cause a voltage drop at the moment when a hard disk controller is removed, resulting in unstable power supply to the hard disk. The unstable power supply to the hard disk is mainly caused by the following two reasons: (1) It is restricted by the driving speed of the anti-backflow controller 110; (2) The anti-backflow module 100 needs to avoid the impact current generated by turning on too quickly. The use of a hot-swappable control module can effectively improve the problem of unstable power supply to the hard disk.

[0083] like Figure 5 As shown, the hot-swap control module 200 a includes: a complex programmable logic device 210 , a button 220 , and a fifth resistor R5 .

[0084] The complex programmable logic device 210 includes a CPLD first port 211, a CPLD second port 212, and a CPLD third port 213. The button 220 includes a button first port 221, a button second port 222, and a pressing end 223. The pressing end 223 is configured to form an electrical connection between the button first port 221 and the button second port 222 when pressed with a force greater than a predetermined value.

[0085] The CPLD first port 211 serves as the hot-swap control first port 201, the CPLD second port 212 serves as the hot-swap control second port 202, the CPLD third port 213 is electrically connected to the key first port 221, the key second port 222 is grounded, and the CPLD third port 213 is also electrically connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the first power supply V DD .

[0086] Preferably, the hot-swap control second port 202 and the voltage conversion second port 302 are connected via a bidirectional transmission channel.

[0087] Preferably, the bidirectional transmission channel is a power management bus (PMBus), which can transmit signals such as pulse width modulation instructions, input voltage and output voltage of the voltage conversion module.

[0088] When the pressing end 223 is not pressed by a force greater than a preset external force, the CPLD third port 213 is pulled up to the first power source V by the fifth resistor R5. DD Preferably, the first power supply V DD The voltage is 3.3V. The third port 213 of the CPLD is valid at a low level. When the pressing end 223 is pressed by an external force greater than a preset force, an electrical connection is formed between the first port 221 of the key and the second port 222 of the key, and the level received by the third port 213 of the CPLD is pulled low. At this time, the CPLD is notified to prepare for the removal action. The complex programmable logic device 210 sends a modulation signal to the voltage conversion module 300 through the second port 212 of the CPLD, so that the output voltage of the voltage conversion module 300 decreases linearly. When the output voltage of the voltage conversion module 300 drops below the output voltage of the power bus, or the board or backplane, the first transistor T1 is turned off to prevent current backflow. At this time, the power bus, or the board or backplane is powered by other redundant power supply circuits. The voltage converter 300 sends a signal to the complex programmable logic device 210 through the second voltage conversion port 302 to inform the CPLD to reduce the output voltage.

[0089] Preferably, the complex programmable logic device 210 further has a CPLD fourth port 214; the hot-swap control module 200b further includes: a light-emitting diode D LE, the sixth resistor R6, such as Figure 6 The hot swap control module 200b is shown.

[0090] The fourth port 214 of the CPLD is connected to the light emitting diode D LE The anode of the light emitting diode D is electrically connected to LE The cathode is connected in series with a sixth resistor R6 and then grounded.

[0091] When the output voltage of the voltage conversion module 300 drops to the preset voltage, it starts to detect the level state of the hot plug control first port 201. When the level state of the hot plug control first port 201 is low, it means that the first transistor has been turned off. At this time, the complex programmable logic device 210 outputs a signal from the CPLD fourth port 214 to turn on the light emitting diode D LE Lights up to indicate the current status of the power supply circuit.

[0092] Specifically, when the power supply circuit is working normally, power is supplied to the hard disk. The pressing end 223 is not pressed by an external force, and no electrical connection is formed between the first key port 221 and the second key port 222. The third CPLD port 213 and the first CPLD port 211 both receive a high level, the complex programmable logic device 210 sends a low level to the fourth CPLD port 214, and the light emitting diode D LE Not luminous.

[0093] When the hard disk controller needs to be maintained, after pressing the push terminal 223, an electrical connection is established between the first key port 221 and the second key port 222, and the voltage of the third CPLD port 213 is pulled down. The complex programmable logic device 210 sends a modulation signal to the voltage conversion module 300 through the second CPLD port 212, causing the output voltage of the voltage conversion module 300 to decrease linearly within a preset time. In principle, the preset time is 100ms. At the same time, a high level is periodically sent to the fourth CPLD port 214, causing the light-emitting diode D LE Flashing, indicating that the current power supply circuit is being prepared for removal.

[0094] When the output voltage of the voltage conversion module 300 continues to drop, causing the first transistor to be completely turned off, the complex programmable logic device 210 continuously sends a high level to the fourth port 214 of the CPLD, so that the light emitting diode D LE If it is always on, it indicates that the current power supply circuit can be removed. Through the coordinated work of the CPLD's fourth port and the LED, maintenance personnel can understand the working status of the power supply circuit and remove it for maintenance.

[0095] The voltage conversion module is a module that boosts or steps down the input voltage from the voltage conversion port before outputting it. Depending on the appliance it powers, the voltage conversion module modulates the input voltage to ensure that the output voltage meets the appliance's operating voltage requirements.

[0096] In some embodiments, as Figure 7 As shown, the voltage conversion module 300a includes: a first driving circuit 310, a second transistor T2, a first diode D1, a first inductor L1, and a first capacitor C1;

[0097] The first driving circuit 310 has: a first driving circuit first port 311 and a first driving circuit second port 312;

[0098] The second transistor T2 has: a first electrode T 21 , the second electrode T of the second transistor 22 , the third electrode of the second transistor T 23 ;

[0099] The second transistor second electrode T 22 As the voltage conversion first port 301, the third electrode of the second transistor T 23 The first inductor L1 and the first capacitor C1 are connected in series and then grounded. The connection point between the first inductor L1 and the first capacitor C1 serves as the third voltage conversion port 303. The third terminal T 23 It is also electrically connected to the cathode of the first diode D1, the anode of the first diode D1 is grounded, and the first electrode of the second transistor T 21 The first driving circuit first port 311 is electrically connected to the first driving circuit second port 312 , and the first driving circuit first port 311 serves as the voltage conversion second port 302 .

[0100] Figure 7 The BUCK circuit including the freewheeling diode is shown, which can convert the input voltage V IN Output after voltage reduction. The first drive circuit 310 is a buck drive circuit. The first drive circuit 310 is capable of receiving instructions from a complex programmable logic device and feeding back the operating status of the voltage conversion module to the complex programmable logic device so that the complex programmable logic device can collect parameters of the voltage conversion module, such as input voltage and output voltage. With respect to the buck circuit output voltage, the first drive circuit 310 adjusts the output voltage of the voltage conversion module through pulse-width modulation (PWM). The operating principle of the buck circuit, including the freewheeling diode, will not be further described here.

[0101] In other embodiments, Figure 8As shown, the voltage conversion module 300b includes: a second driving circuit 320, a second transistor T2, a third transistor T3, a first inductor L1, and a first capacitor C1.

[0102] The second driving circuit 320 has: a second driving circuit first port 321, a second driving circuit second port 322, and a second driving circuit third port 323; the second transistor T2 has: a second transistor first terminal T 21 , the second electrode T of the second transistor 22 , the third electrode of the second transistor T 23 The third transistor T3 has: a first electrode of the third transistor T 31 , the second electrode T of the third transistor 32 , the third transistor third electrode T 33 .

[0103] The second transistor second electrode T 22 As the voltage conversion first port 301, the third electrode of the second transistor T 23 The first inductor L1 and the first capacitor C1 are connected in series and then grounded. The connection point between the first inductor L1 and the first capacitor C1 serves as the third voltage conversion port 303. The third terminal T 23 Also connected to the second electrode T of the third transistor 32 Electrically connected, the third transistor third electrode T 33 Grounded, the first electrode of the second transistor T 21 The first terminal of the third transistor T is electrically connected to the second port 322 of the second driving circuit. 31 The second driving circuit first port 321 is electrically connected to the second driving circuit third port 323 , and serves as the voltage conversion second port 302 .

[0104] Figure 8 The synchronous rectifier BUCK circuit is shown, which can convert the input voltage V IN Output after voltage reduction. The second drive circuit 320 is used to drive the second transistor T2 and the third transistor T3 to alternately turn on and off; receive instructions from the complex programmable logic device; and feedback the operating status of the voltage conversion module to the complex programmable logic device so that the complex programmable logic device can collect parameters of the voltage conversion module such as input voltage and output voltage. For the output voltage of the BUCK circuit, the second drive circuit 320 adjusts the output voltage of the voltage conversion module through pulse width modulation (PWM). The operating principle of the synchronous rectification BUCK circuit will not be repeated here.

[0105] In other embodiments, Figure 9As shown, the voltage conversion module 300c includes: a third driving circuit 330, a fourth transistor T4, a second diode D2, a second inductor L2, and a second capacitor C2.

[0106] The third driving circuit 330 has: a third driving circuit first port 331 and a third driving circuit second port 332; the fourth transistor T4 has: a fourth transistor first terminal T 41 , the second electrode T of the fourth transistor 42 , the third electrode of the fourth transistor T 43 .

[0107] The second electrode T of the fourth transistor 42 As the voltage conversion first port 301, the third electrode of the fourth transistor T 43 The second inductor L2 is connected in series and then grounded. The third electrode T 43 The cathode of the second diode D2 is also electrically connected. The anode of the second diode D2 serves as the voltage conversion third port 303. The anode of the second diode D2 is also connected in series with the second capacitor C2 and then grounded. The first electrode of the fourth transistor T 41 The first port 331 of the third driving circuit is electrically connected to the second port 332 of the third driving circuit, and serves as the voltage conversion second port 302 .

[0108] Figure 9 The BUCK-BOOST circuit is shown, which can convert the input voltage V IN Output after boosting or stepping down. The third driving circuit 330 is used to drive the on and off of the fourth transistor T4; receive instructions from the complex programmable logic device; and feedback the working status of the voltage conversion module to the complex programmable logic device so that the complex programmable logic device can collect the parameters of the voltage conversion module such as input voltage and output voltage. For the output voltage of the BUCK-BOOST circuit, the third driving circuit 330 adjusts the output voltage of the voltage conversion module by means of pulse width modulation (PWM). It should be noted that the polarity of the voltage output by the third port 303 of the voltage conversion is the same as the input voltage V of the first port 301 of the voltage conversion. IN The working principle of the BUCK-BOOST circuit will not be described here.

[0109] In other embodiments, Figure 10 As shown, the voltage conversion module 300d includes: a fourth driving circuit 340, a fifth transistor T5, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, and a fourth capacitor C4.

[0110] The fourth driving circuit 340 includes: a fourth driving circuit first port 341, a fourth driving circuit second port 342, and a fourth driving circuit third port 343; the fifth transistor T5 includes: a fifth transistor first terminal T 51 , the second electrode T of the fifth transistor 52 , the third electrode T of the fifth transistor 53 .

[0111] The third electrode T of the fifth transistor 53 The third capacitor C3 is connected in series and then grounded. The third electrode T 53 The connection point with the third capacitor C3 is used as the voltage conversion first port 301, and the second terminal T of the fifth transistor 52 The fourth capacitor C4 is connected in series and then grounded, and the second electrode T of the fifth transistor 52 The connection point with the fourth capacitor C4 is used as the voltage conversion third port 303, and the second electrode T of the fifth transistor 52 A seventh resistor R7 and an eighth resistor R8 are connected in series and then grounded. The connection point between the seventh resistor R7 and the eighth resistor R8 is electrically connected to the first port 341 of the fourth driving circuit. The second port 342 of the fourth driving circuit serves as the voltage conversion second port 302. The third port 343 of the fourth driving circuit is connected to the first electrode T of the fifth transistor. 51 Electrical connection.

[0112] Figure 10 shows an LDO circuit that can convert the input voltage V IN The second voltage conversion port 302 is connected to the reference voltage V REF2 The reference voltage can be provided by the complex programmable logic device 210 or by a reference voltage V REF2 The working principle of the LDO circuit is not described here in detail.

[0113] This application does not limit the above components, including: the specific models and values ​​of each transistor, each resistor, each diode, and capacitor; the first power supply V DD 、Input voltage V IN , reference voltage V REF , reference voltage V REF2 This is because different component selections will cause changes in the specific values ​​of other components. It should be emphasized that under the definition of the electrostatic protection circuit in this application, those skilled in the art can select the corresponding component model and set the corresponding component value according to the circuit function and the specific parameters of each component to achieve the circuit function.

[0114] In other embodiments, a power supply method is applicable to the above power supply circuit, such as Figure 11 As shown, including:

[0115] S100: In response to a pressing end of a button in the hot-swap control module being pressed with a force greater than a preset external force, lowering the output voltage of the voltage conversion module to a preset voltage within a preset time;

[0116] S200: In response to the first transistor in the backflow prevention module being turned off due to a drop in output voltage, the removal preparation is completed.

[0117] When any of the hard disk controllers needs to be hot-swapped for maintenance, the pressing end of a button, which may be a button on a control panel, is pressed. The complex programmable logic device detects that the voltage of the third port of the CPLD is flipped to a low level, and the complex programmable logic device begins to prepare for hot-swap removal.

[0118] The complex programmable logic device periodically sends a high-level signal to the fourth port of the CPLD, causing the light-emitting diode to flash, indicating that preparations for hot-swap removal are in progress. Simultaneously, it sends a signal to the voltage conversion module to linearly reduce its output voltage within a preset time. The first port of the CPLD then detects the on / off state of the first transistor.

[0119] When the signal at the first port of the CPLD is detected to flip from a high level to a low level, indicating that the first transistor has been turned off, the complex programmable logic device controls the fourth port of the CPLD to send a high level signal, making the light-emitting diode always on, indicating that the removal preparation is complete.

[0120] After the hard disk controller is maintained, simply insert it into the corresponding position on the backplane to enable the hard disk controller to start working normally.

[0121] In other embodiments, a hard disk controller includes the above-mentioned power supply circuit.

[0122] In other embodiments, a redundant power supply system includes: a backplane, at least one hard disk, and at least one of the hard disk controllers described above;

[0123] The backplane comprises: a power supply layer, at least one hard disk controller interface, and at least one hard disk interface; the power supply layer is electrically connected to any hard disk controller interface of the at least one hard disk controller interface, and the power supply layer is also electrically connected to any hard disk interface of the at least one hard disk interface.

[0124] Any hard disk controller interface in the at least one hard disk controller interface is used to connect to any hard disk controller in the at least one hard disk controller; any hard disk interface in the at least one hard disk interface is used to connect to any hard disk in the at least one hard disk.

[0125] At least one hard disk controller, on the one hand, provides redundant power supply to the hard disk; on the other hand, performs input and output access or control on at least one hard disk.

[0126] At least one hard disk controller supplies power to at least one hard disk via the power layer.

[0127] In other embodiments, a server includes the above-mentioned redundant power supply system.

[0128] By implementing a power supply circuit, power supply method, hard disk controller and redundant power supply system disclosed in the embodiments of the present application, the power supply circuit can be stably supplied to electrical appliances during hot-swap maintenance, thereby improving the maintainability of the power supply circuit.

[0129] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and will not be described in detail here.

[0130] Example 1

[0131] A power supply circuit, such as Figure 2 As shown, it includes: an anti-backflow module 100, a hot-swap control module 200, and a voltage conversion module 300;

[0132] The backflow prevention module 100 has: a first backflow prevention port 101, a second backflow prevention port 102, and a third backflow prevention port 103;

[0133] The hot-swap control module 200 comprises: a first hot-swap control port 201 and a second hot-swap control port 202;

[0134] The voltage conversion module 300 has: a first voltage conversion port 301 , a second voltage conversion port 302 , and a third voltage conversion port 303 ;

[0135] The first backflow prevention port 101 is electrically connected to the third voltage conversion port 303, the second backflow prevention port 102 is electrically connected to the first hot plug control port 201, the third backflow prevention port 103 is used to output voltage, the second hot plug control port 202 is electrically connected to the second voltage conversion port 302, and the first voltage conversion port 301 is connected to the input voltage.

[0136] Example 2

[0137] Based on the first embodiment, Figure 12 shown.

[0138] The backflow prevention module 100 includes: a backflow prevention controller 110, an operational amplifier 120, a comparator 130, a first transistor T1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.

[0139] The anti-backflow controller 110 has: an anti-backflow controller first port 111, an anti-backflow controller second port 112, and an anti-backflow controller third port 113; the operational amplifier 120 has: an operational amplifier non-inverting input terminal 121, an operational amplifier inverting input terminal 122, and an operational amplifier output terminal 123; the comparator 130 has: a comparator non-inverting input terminal 131, a comparator inverting input terminal 132, and a comparator output terminal 133; the first transistor T1 has: a first transistor first electrode T 11 , the second electrode T of the first transistor 12 , the third electrode T of the first transistor 13 .

[0140] The third electrode T of the first transistor 13 As the first port 101 for preventing backflow, the second electrode T of the first transistor 12 As the third anti-backflow port 103, the first transistor first electrode T 11 The first port 111 of the anti-backflow controller is electrically connected to the third terminal 113 of the anti-backflow controller, and the third terminal 111 of the first transistor is electrically connected to the third terminal 113 of the anti-backflow controller. 13 The second port 112 of the anti-backflow controller is electrically connected to the second electrode T of the first transistor. 12 Electrically connected, the first transistor third electrode T 13 The first resistor R1 is connected in series with the inverting input terminal 122 of the operational amplifier, and the inverting input terminal 122 of the operational amplifier is also electrically connected to one end of the second resistor R2. The other end of the second resistor R2 is electrically connected to the output terminal 123 of the operational amplifier. 11 The third resistor R3 is connected in series with the op amp non-inverting input terminal 121, which is also electrically connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is grounded. The op amp output terminal 123 is also electrically connected to the comparator non-inverting input terminal 131. The comparator inverting input terminal 132 is connected to the reference voltage V REF The comparator output terminal 133 serves as the second anti-backflow port 102 .

[0141] The hot-swap control module 200 includes a complex programmable logic device 210 , a button 220 , and a fifth resistor R5 .

[0142] The complex programmable logic device 210 includes: a CPLD first port 211 , a CPLD second port 212 , and a CPLD third port 213 ; the button 220 includes: a button first port 221 and a button second port 222 .

[0143] The CPLD first port 211 serves as the hot-swap control first port 201, the CPLD second port 212 serves as the hot-swap control second port 202, the CPLD third port 213 is electrically connected to the key first port 221, the key second port 222 is grounded, and the CPLD third port 213 is also electrically connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the first power supply V DD .

[0144] The power supply circuit described in the first embodiment will not be described in detail here.

[0145] Example 3

[0146] On the basis of Example 1 or Example 2, Figure 13 shown.

[0147] The complex programmable logic device 210 further has a CPLD fourth port 214; the hot swap control module 200 further includes: a light emitting diode D LE , sixth resistor R6.

[0148] The fourth port 214 of the CPLD is connected to the light emitting diode D LE The anode of the light emitting diode D is electrically connected to LE The cathode is connected in series with a sixth resistor R6 and then grounded.

[0149] The voltage conversion module 300 b includes: a second driving circuit 320 , a second transistor T2 , a third transistor T3 , a first inductor L1 , and a first capacitor C1 .

[0150] The second driving circuit 320 has: a second driving circuit first port 321, a second driving circuit second port 322, and a second driving circuit third port 323; the second transistor T2 has: a second transistor first terminal T 21 , the second electrode T of the second transistor 22 , the third electrode of the second transistor T 23 The third transistor T3 has: a first electrode of the third transistor T 31 , the second electrode T of the third transistor 32 , the third transistor third electrode T 33 .

[0151] The second transistor second electrode T 22 As the voltage conversion first port 301, the third electrode of the second transistor T 23 The first inductor L1 and the first capacitor C1 are connected in series and then grounded. The connection point between the first inductor L1 and the first capacitor C1 serves as the third voltage conversion port 303. The third terminal T 23 Also connected to the second electrode T of the third transistor 32 Electrically connected, the third transistor third electrode T 33Grounded, the first electrode of the second transistor T 21 The first terminal of the third transistor T is electrically connected to the second port 322 of the second driving circuit. 31 The second driving circuit first port 321 is electrically connected to the second driving circuit third port 323 , and serves as the voltage conversion second port 302 .

[0152] The power supply circuit described in the first or second embodiment will not be described in detail here.

[0153] Example 4

[0154] A power supply method is applicable to the power supply circuit described in the first embodiment, the second embodiment, or the third embodiment, such as Figure 11 Shown, including:

[0155] S100: In response to a pressing end of a button in the hot-swap control module being pressed with a force greater than a preset external force, lowering the output voltage of the voltage conversion module to a preset voltage within a preset time;

[0156] S200: In response to the first transistor in the backflow prevention module being turned off due to a drop in output voltage, the removal preparation is completed.

[0157] The power supply circuit described in the first embodiment, the second embodiment, or the third embodiment will not be described in detail here.

[0158] Example 5

[0159] A hard disk controller includes the power supply circuit described in the first embodiment, the second embodiment, or the third embodiment.

[0160] The power supply circuit described in the first embodiment, the second embodiment, or the third embodiment will not be described in detail here.

[0161] Example 6

[0162] A redundant power supply system, comprising: a backplane, at least one hard disk, and at least one hard disk controller according to the fifth embodiment;

[0163] The backplane comprises: a power supply layer, at least one hard disk controller interface, and at least one hard disk interface; the power supply layer is electrically connected to any hard disk controller interface of the at least one hard disk controller interface, and the power supply layer is also electrically connected to any hard disk interface of the at least one hard disk interface.

[0164] Any hard disk controller interface in the at least one hard disk controller interface is used to connect to any hard disk controller in the at least one hard disk controller; any hard disk interface in the at least one hard disk interface is used to connect to any hard disk in the at least one hard disk.

[0165] At least one hard disk controller, on the one hand, provides redundant power supply to the hard disk; on the other hand, performs input and output access or control on at least one hard disk.

[0166] At least one hard disk controller supplies power to at least one hard disk via the power layer.

[0167] The hard disk controller described in the fifth embodiment will not be described in detail here.

[0168] Example 7

[0169] A server includes the redundant power supply system described in embodiment six.

[0170] The redundant power supply system described in Example 6 will not be described in detail here.

[0171] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A power supply circuit, characterized in that: include: Anti-backflow module, hot-swap control module, voltage conversion module; The anti-backflow module has: an anti-backflow first port, an anti-backflow second port, and an anti-backflow third port; The hot-swap control module comprises: a first hot-swap control port and a second hot-swap control port; The voltage conversion module has: a first voltage conversion port, a second voltage conversion port, and a third voltage conversion port; The first anti-backflow port is electrically connected to the third voltage conversion port, the second anti-backflow port is electrically connected to the first hot plug control port, the third anti-backflow port is used to output voltage, the second hot plug control port is electrically connected to the second voltage conversion port, and the first voltage conversion port is connected to the input voltage; The power supply circuit is configured to provide redundant power supply to the electrical appliance when the power supply circuit is operating normally; When the power supply circuit needs to be hot-swapped for maintenance, the power supply to the electrical appliance is stabilized after removal preparation; Wherein, the hot-swap control module includes: a complex programmable logic device, a button, and a fifth resistor; The complex programmable logic device comprises: a CPLD first port, a CPLD second port, and a CPLD third port; The button has: a first button port and a second button port; The first port of the CPLD serves as the first hot-swap control port, the second port of the CPLD serves as the second hot-swap control port, the third port of the CPLD is electrically connected to the first button port, the second button port is grounded, the third port of the CPLD is also electrically connected to one end of the fifth resistor, and the other end of the fifth resistor is connected to the first power supply.

2. The power supply circuit according to claim 1, wherein: The anti-backflow module includes: an anti-backflow controller, an operational amplifier, a comparator, a first transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor; The anti-backflow controller has: an anti-backflow controller first port, an anti-backflow controller second port, and an anti-backflow controller third port; The operational amplifier comprises: an operational amplifier non-inverting input terminal, an operational amplifier inverting input terminal, and an operational amplifier output terminal; The comparator comprises: a comparator non-inverting input terminal, a comparator inverting input terminal, and a comparator output terminal; The first transistor comprises: a first transistor first electrode, a first transistor second electrode, and a first transistor third electrode; The third electrode of the first transistor serves as the first anti-backflow port, and the second electrode of the first transistor serves as the third anti-backflow port. The first electrode of the first transistor is electrically connected to the third port of the anti-backflow controller, the first port of the anti-backflow controller is electrically connected to the third electrode of the first transistor, and the second port of the anti-backflow controller is electrically connected to the second electrode of the first transistor. The third electrode of the first transistor is electrically connected to the inverting input terminal of the operational amplifier after being connected in series with the first resistor. The inverting input terminal of the operational amplifier is also electrically connected to one end of the second resistor, and the other end of the second resistor is electrically connected to the output terminal of the operational amplifier. The first electrode of the first transistor is electrically connected to the non-inverting input terminal of the operational amplifier after being connected in series with the third resistor. The non-inverting input terminal of the operational amplifier is also electrically connected to one end of the fourth resistor, and the other end of the fourth resistor is grounded. The output terminal of the operational amplifier is also electrically connected to the non-inverting input terminal of the comparator. The inverting input terminal of the comparator is connected to the reference voltage, and the output terminal of the comparator serves as the second anti-backflow port.

3. The power supply circuit according to claim 1, wherein: The complex programmable logic device further has a CPLD fourth port; The hot-swap control module further includes: a light-emitting diode and a sixth resistor; The fourth port of the CPLD is electrically connected to the anode of the light emitting diode, and the cathode of the light emitting diode is connected in series with the sixth resistor and then grounded.

4. The power supply circuit according to claim 1, wherein: The voltage conversion module includes: a first driving circuit, a second transistor, a first diode, a first inductor, and a first capacitor; The first driving circuit comprises: a first driving circuit first port and a first driving circuit second port; The second transistor comprises: a second transistor first electrode, a second transistor second electrode, and a second transistor third electrode; The second electrode of the second transistor serves as the first voltage conversion port, the third electrode of the second transistor is connected in series with the first inductor and the first capacitor and then grounded, the connection between the first inductor and the first capacitor serves as the third voltage conversion port, the third electrode of the second transistor is also electrically connected to the cathode of the first diode, the anode of the first diode is grounded, the first electrode of the second transistor is electrically connected to the second port of the first drive circuit, and the first port of the first drive circuit serves as the second voltage conversion port.

5. The power supply circuit according to claim 1, wherein: The voltage conversion module includes: a second driving circuit, a second transistor, a third transistor, a first inductor, and a first capacitor; The second driving circuit comprises: a second driving circuit first port, a second driving circuit second port, and a second driving circuit third port; The second transistor comprises: a second transistor first electrode, a second transistor second electrode, and a second transistor third electrode; The third transistor comprises: a third transistor first electrode, a third transistor second electrode, and a third transistor third electrode; The second electrode of the second transistor serves as the first port for voltage conversion, the third electrode of the second transistor is sequentially connected in series with the first inductor and the first capacitor and then grounded, the connection between the first inductor and the first capacitor serves as the third port for voltage conversion, the third electrode of the second transistor is also electrically connected to the second electrode of the third transistor, the third electrode of the third transistor is grounded, the first electrode of the second transistor is electrically connected to the second port of the second drive circuit, the first electrode of the third transistor is electrically connected to the third port of the second drive circuit, and the first port of the second drive circuit serves as the second port for voltage conversion.

6. The power supply circuit according to claim 1, wherein: The voltage conversion module includes: a third driving circuit, a fourth transistor, a second diode, a second inductor, and a second capacitor; The third driving circuit comprises: a third driving circuit first port and a third driving circuit second port; The fourth transistor comprises: a fourth transistor first electrode, a fourth transistor second electrode, and a fourth transistor third electrode; The second electrode of the fourth transistor serves as the first port for voltage conversion, the third electrode of the fourth transistor is connected in series with the second inductor and then grounded, the third electrode of the fourth transistor is also electrically connected to the cathode of the second diode, the anode of the second diode serves as the third port for voltage conversion, the anode of the second diode is also connected in series with the second capacitor and then grounded, the first electrode of the fourth transistor is electrically connected to the second port of the third drive circuit, and the first port of the third drive circuit serves as the second port for voltage conversion.

7. A power supply method, characterized in that: The power supply method is applied to the power supply circuit according to any one of claims 1 to 6, and the method includes: In response to a pressing force greater than a preset external force on a pressing end of a button in the hot-swap control module, the output voltage of the voltage conversion module is lowered to a preset voltage within a preset time; In response to the first transistor in the backflow prevention module being turned off due to the output voltage drop, the removal preparation is completed.

8. A hard disk controller, characterized in that: The power supply circuit comprises the power supply circuit according to any one of claims 1 to 6.

9. A redundant power supply system, characterized in that: include: A backplane, at least one hard disk, and at least one hard disk controller according to claim 8; The backplane comprises: a power supply layer, at least one hard disk controller interface, and at least one hard disk interface; The power layer is electrically connected to any hard disk controller interface of the at least one hard disk controller interface, and the power layer is also electrically connected to any hard disk interface of the at least one hard disk interface; Any hard disk controller interface of the at least one hard disk controller interface is used to connect to any hard disk controller of the at least one hard disk controller; Any hard disk interface of the at least one hard disk interface is used to connect any hard disk of the at least one hard disk.

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