Power supply configuration circuit, power supply circuit, and power supply method
Patent Information
- Application Number
- PCT/CN2025/120766
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-02-20
- Filing Date
- 2025-09-11
- Publication Date
- 2026-08-27
Smart Images
Figure CN2025120766_27082026_PF_FP_ABST
Abstract
Description
A power supply selection circuit, a power supply circuit, and a power supply method
[0001] Cross-reference of related applications
[0002] This application claims priority to Chinese Patent Application No. 202510187951.2, filed on February 20, 2025, entitled “A power supply selection circuit, power supply circuit and power supply method”, the entire contents of which are incorporated herein by reference. Technical Field
[0003] This application relates to the field of computer circuit technology, and in particular to a power supply selection circuit, a power supply circuit, and a power supply method. Background Technology
[0004] With the widespread adoption of cloud technology, the demands for processing massive amounts of data daily are constantly increasing the requirements for server computing speed and storage capacity. Servers must be equipped with larger capacity memory to meet the demands for data processing efficiency and capabilities. Typically, scalable memory pools are used to meet the hardware requirements for data processing. The PCIe bus can supply 75W of power to memory pooled devices. When memory power consumption approaches or exceeds 75W, an additional independent power supply interface is needed to meet the memory power requirements. However, additional power supply interfaces will occupy circuit board space, hindering device miniaturization. Summary of the Invention
[0005] In a first aspect, a power supply selection circuit is provided, including: a selection control module, a voltage divider network, and a first protection circuit;
[0006] The first protection circuit is connected to the selection control module to form the first power supply branch. The first protection circuit is also connected to the selection control module and the voltage divider network to form the signal branch.
[0007] The selection control module is used to acquire the control signal, generate an enable signal corresponding to the control signal in conjunction with the voltage divider network, and transmit the enable signal to the first protection circuit through the signal branch, so as to turn on or off the first power supply branch according to the level state of the control signal.
[0008] A voltage divider network is used to generate an enable signal adapted to the first protection circuit based on the control signal.
[0009] The first protection circuit is used to output the power supply voltage obtained from its power input port to the selection control module when the enable signal enables the first protection circuit.
[0010] Furthermore, the selection control module has: a control signal input port, a selection pull-up port, a control signal output port, a selection voltage input port, and a selection voltage output port;
[0011] The voltage divider network has: a network voltage input port and an enable signal port;
[0012] The first protection circuit also includes: an enable input port and a voltage output port;
[0013] The control signal input port is used to receive control signals, the selective pull-up port is used to obtain the working voltage for processing control signals, the selective voltage output port is used to provide voltage to the load, the network voltage input port is used to obtain the working voltage for the voltage divider network, the control signal output port is connected to the enable signal port and the enable input port, and the selective voltage input port is connected to the voltage output port.
[0014] Furthermore, the selected control module includes: a first control unit and a second control unit;
[0015] The first control unit is used to determine the enable signal based on the control signal;
[0016] The second control unit is used to output the voltage transmitted from the voltage output port of the first protection circuit after the first protection circuit is enabled.
[0017] Furthermore, the first control unit has: a first control port, a second control port, and a third control port;
[0018] The second control unit has: a fourth control port, a fifth control port, and a sixth control port;
[0019] The first control port and the fourth control port are connected to serve as the control signal input port, the second control port serves as the selective control pull-up port, the third control port serves as the control signal output port, the fifth control port serves as the selective control voltage input port, and the sixth control port serves as the selective control voltage output port.
[0020] Furthermore, the first control unit includes a first switching device and a second switching device;
[0021] The first switching device has: a first switch first pole, a first switch second pole, and a first switch third pole;
[0022] The second switching device has: a first pole of the second switch, a second pole of the second switch, and a third pole of the second switch;
[0023] The first pole of the first switch serves as the first control port, the second pole of the first switch is connected to the first pole of the second switch to serve as the second control port, and the second pole of the second switch serves as the third control port.
[0024] Furthermore, both the first and second switching devices are N-channel metal-oxide-semiconductor field-effect transistors.
[0025] Furthermore, the second control unit includes: a third switching device and a fourth switching device;
[0026] The third switching device has: a first pole of the third switch, a second pole of the third switch, and a third pole of the third switch;
[0027] The fourth switching device has: a first pole of the fourth switch, a second pole of the fourth switch, and a third pole of the fourth switch;
[0028] The first pole of the third switch is connected to the fourth control port, the second pole of the third switch is connected to the first pole of the fourth switch, the second pole of the fourth switch is connected to the fifth control port, and the third pole of the fourth switch is connected to the sixth control port.
[0029] Furthermore, the second control unit also includes a first resistor;
[0030] The first resistor is connected in parallel between the first terminal of the fourth switch and the third terminal of the fourth switch.
[0031] Furthermore, the third switching device is an N-channel metal-oxide-semiconductor field-effect transistor, and the fourth switching device is a P-channel metal-oxide-semiconductor field-effect transistor.
[0032] Furthermore, the voltage divider network includes a second resistor and a third resistor;
[0033] One end of the second resistor serves as the network voltage input port of the voltage divider network, and the other end of the second resistor is connected to one end of the third resistor to serve as the enable signal port of the voltage divider network.
[0034] Furthermore, the power supply optional circuit also includes diodes;
[0035] The anode of the diode is connected to the selective control voltage input port, and the cathode of the diode is connected to the selective control voltage output port.
[0036] Furthermore, the power supply optional circuit also includes: a fourth resistor;
[0037] The fourth resistor is connected in series between the control signal output port and the enable signal port.
[0038] Furthermore, the first protection circuit includes an electronic fuse.
[0039] Furthermore, the enable signal is in the form of a logic level, which includes low and high levels.
[0040] Furthermore, the first protection circuit is connected in series between the power supply voltage and the selection control module, and its conduction or deactivation is controlled by an enable signal to control whether to supply power voltage to the selection control module.
[0041] In a second aspect, a power supply circuit is provided, comprising the power supply selection circuit, the first power supply unit, the second power supply unit, the second protection circuit, the fifth resistor, and the sixth resistor described in the first aspect.
[0042] The first power supply unit has: a first voltage output port;
[0043] The second power supply unit has: a second voltage output port, a load signal output port, and a load status receiving port;
[0044] The first voltage output port is connected to the power input port to supply power to the first protection circuit. The second voltage output port is connected to the selective control voltage output port to form the second power supply branch. The load signal output port is connected to the control signal input port to generate a control signal based on the load status signal and transmit the control signal to the selective control module. The load status receiving port is used to acquire the load status signal.
[0045] The second protection circuit is connected in series between the selectable voltage output port and the load. One end of the fifth resistor is connected to the load status receiving port, and one end of the sixth resistor is connected to the selectable pull-up port.
[0046] Preferably, the load status signal is used to indicate the load status of the connected power supply circuit, and the load status includes light load or heavy load.
[0047] Thirdly, a circuit board is provided, including the power supply selection circuit described in the first aspect, or the power supply circuit described in the second aspect.
[0048] Fourthly, a power supply method is provided, applied to the power supply circuit described in the second aspect, comprising:
[0049] Connect the first voltage output port to the power input port, connect the second voltage output port to the selectable voltage input port, and connect the load signal output port to the control signal input port;
[0050] In response to the load power being less than the preset power, a control signal with a level state of the first level state is acquired to generate an enable signal for enabling the first protection circuit and disconnect the second power supply branch.
[0051] The first protection circuit is enabled according to the enable signal, so as to conduct the first power supply branch and supply power to the load from the first power supply unit.
[0052] Furthermore, the power supply method also includes:
[0053] In response to a load power greater than or equal to a preset power, a control signal with a level state of the second level state is acquired to enable the second power supply unit, and an enable signal for shutting down the first protection circuit is generated to disconnect the first power supply branch, so that the second power supply unit supplies power to the load. Attached Figure Description
[0054] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0055] Figure 1 is a schematic diagram of a power supply optional circuit module provided in one or more embodiments of this application;
[0056] Figure 2 is a schematic diagram of a selection control module provided in one or more embodiments of this application;
[0057] Figure 3 is a schematic diagram of a control unit circuit provided in one or more embodiments of this application;
[0058] Figure 4 is a schematic diagram of a voltage divider network circuit provided in one or more embodiments of this application;
[0059] Figure 5 is a schematic diagram of another power supply optional circuit provided in one or more embodiments of this application;
[0060] Figure 6 is a schematic diagram of a power supply circuit provided in one or more embodiments of this application;
[0061] Figure 7 is a schematic diagram of a power supply method provided by one or more embodiments of this application. Detailed Implementation
[0062] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0063] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The numbers in the accompanying drawings are only used to distinguish individual functional parts or modules and do not indicate logical relationships between parts or modules. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0064] The various embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same reference numerals are assigned to components having substantially the same or similar structure and function, and repeated descriptions of them will be omitted.
[0065] To address the issue that increasing the number of computer memory modules requires additional power supply interfaces and occupies more circuit board space, this application provides the following embodiments:
[0066] In some embodiments, as shown in FIG1, a power supply selection circuit includes: a selection control module 100, a voltage divider network 200, and a first protection circuit 300.
[0067] The first protection circuit 300 is connected to the selection control module 100 to form the first power supply branch. The first protection circuit 300 is also connected to the selection control module 100 and the voltage divider network 200 to form the signal branch.
[0068] The control module 100 is selected to acquire the control signal, and in conjunction with the voltage divider network 200, generates an enable signal corresponding to the control signal. The enable signal is then transmitted to the first protection circuit 300 through a signal branch to turn the first power supply branch on or off according to the level of the control signal.
[0069] Optionally, the device used in the first protection circuit 300 can be an electronic device that can be controlled to turn on or off by a control signal, such as an electronic fuse. Schematically, a device of model number MP5325C manufactured by Monolithic Power Systems, Inc. can be used as the first protection circuit 300. The MP5325C is an electronic device capable of protecting hot-swappable circuits and protecting the output voltage from transient fluctuations in the input voltage.
[0070] Voltage divider network 200 is used to generate an enable signal with a voltage amplitude adapted to the first protection circuit 300 based on the control signal.
[0071] Since the enable signal is in the form of a logic level, which includes both low and high levels, the voltage divider network 200 converts the control signal into a logic level with a voltage amplitude adapted to the first protection circuit 300. Illustratively, the enable signal voltage amplitude range adapted to the MP5325C device is as follows: voltage signals with an amplitude between 0V and 0.9V are considered low-level signals; voltage signals with an amplitude above 2.9V are considered high-level signals. Through the voltage divider network 200, the control signal can be converted into a low-level signal with an amplitude between 0V and 0.9V, or a high-level signal with an amplitude above 2.9V.
[0072] The first protection circuit 300 is used to output the power supply voltage obtained by its power input port 300a to the selection control module 100 when the first protection circuit 300 is enabled by the enable signal.
[0073] The power input port 300a of the first protection circuit 300 is used to obtain the power supply voltage. The first protection circuit 300 is connected in series between the power supply voltage and the selection control module 100. The enable signal controls its conduction or shutdown to control whether to provide power supply voltage to the selection control module 100.
[0074] As shown in Figure 2, the selection control module 100 has: a control signal input port 100a, a selection control pull-up port 100b, a control signal output port 100c, a selection control voltage input port 100d, and a selection control voltage output port 100e.
[0075] The voltage divider network 200 has: a network voltage input port 200a and an enable signal port 200b.
[0076] The first protection circuit 300 also has an enable input port 300b and a voltage output port 300c.
[0077] Schematic example, taking the MP5325C device as the first protection circuit 300, its pin numbered 21 and / or 22 serves as the power input port 300a, one or more of its pins numbered 13, 14, 15, 16, 17, 18, 19 and 20 serve as the voltage output port 300c, and its pin numbered 2 serves as the enable input port 300b.
[0078] The control signal input port 100a is used to receive control signals.
[0079] The selectable pull-up port 100b is used to obtain the operating voltage for processing control signals. This operating voltage can be provided by an independent power supply or by a power management module. Schematic, the amplitude of this operating voltage is 3.3V.
[0080] The selectable voltage output port 100e is used to supply voltage to the load.
[0081] The network voltage input port 200a is used to obtain the operating voltage for the voltage divider network. This operating voltage can be provided by an independent power supply or by a power management module. Schematic, the amplitude of this operating voltage is 12V.
[0082] The control signal output port 100c is connected to the enable signal port 200b and the enable input port 300b, and is used to output the enable signal corresponding to the control signal.
[0083] The selector voltage input port 100d is connected to the voltage output port 300c and is used to obtain the power supply voltage of the power input port 300a in the first power supply branch. The enable input port 300b is used to obtain the enable signal.
[0084] Specifically, the selection control module 100 includes: a first control unit 110 and a second control unit 120;
[0085] The first control unit 110 is used to determine the enable signal based on the control signal.
[0086] The second control unit 120 is used to output the voltage transmitted from the voltage output port 300c of the first protection circuit 300 after the first protection circuit 300 is enabled.
[0087] The first control unit 110 has a first control port 110a, a second control port 110b and a third control port 110c.
[0088] The second control unit 120 has: a fourth control port 120a, a fifth control port 120b and a sixth control port 120c.
[0089] The first control port 110a is connected to the fourth control port 120a and serves as the control signal input port 100a. The second control port 110b serves as the selective control pull-up port 100b. The third control port 110c serves as the control signal output port 100c. The fifth control port 120b serves as the selective control voltage input port 100d. The sixth control port 120c serves as the selective control voltage output port 100e.
[0090] As shown in Figure 3, the first control unit 110 includes a first switching device T1 and a second switching device T2.
[0091] The first switching device T1 has: a first switch first pole T 11 First switch, second pole T 12 and the third pole T of the first switch 13 .
[0092] The second switching device T2 has: a second switch first pole T 21 Second switch, second pole T 22 and the second switch, third pole T 23 .
[0093] First switch, first pole T 11 As the first control port 110a, the second pole of the first switch T 12 With the first pole T of the second switch 21 After connection, it serves as the second control port 110b, and the second pole T of the second switch. 22 As the third control port 110c, the third pole of the first switch T 13 and the second switch, third pole T 23 Connect to the reference potential.
[0094] Preferably, the reference potential is the ground potential.
[0095] Preferably, both the first switching device T1 and the second switching device T2 are N-channel metal-oxide-semiconductor field-effect transistors.
[0096] Taking both the first switching device T1 and the second switching device T2 as N-channel metal-oxide-semiconductor field-effect transistors as an example, the first electrode T of the first switch... 11 For the gate, the second electrode of the first switch is T. 12 The drain is the third terminal of the first switch, T. 13 The source; the first electrode of the second switch, T. 21 For the gate, the second switch, the second electrode T 22 The drain is the second switch, and the third terminal is T. 23 For the source pole.
[0097] When the first switch first pole T 11When a high-level signal is received, the first switching device T1 is turned on, and the first pole of the second switch T1 is turned on. 21 The potential is pulled low to ground, therefore, the second switching device T2 is turned off, and the voltage output from the third control port 110c is the voltage at the second terminal T of the second switch. 22 The voltage.
[0098] When the first switch first pole T 11 When a low-level signal is received,
[0099] The second control unit 120 includes: a third switching device T3 and a fourth switching device T4;
[0100] The third switching device T3 has: the first pole of the third switch T 31 The second pole of the third switch T 32 and the third switch, third pole T 33 ;
[0101] The fourth switching device T4 has: the first pole T of the fourth switch 41 The second pole of the fourth switch T 42 and the third pole T of the fourth switch 43 ;
[0102] Third switch, first pole T 31 With the fourth control port 120a, the second pole of the third switch T 32 With the first pole T of the fourth switch 41 Connection, fourth switch, second pole T 42 As the fifth control port 120b, the third pole of the fourth switch T 43 As the sixth control port 120c, the third pole of the third switch T 33 Connect to the reference potential.
[0103] Preferably, the reference potential is the ground potential.
[0104] The second control unit 120 also includes a first resistor R1;
[0105] The first resistor R1 is connected in parallel to the first terminal T of the fourth switch. 41 With the third pole T of the fourth switch 43 between.
[0106] Preferably, the third switching device T3 is an N-channel metal-oxide-semiconductor field-effect transistor, and the fourth switching device T4 is a P-channel metal-oxide-semiconductor field-effect transistor.
[0107] Taking the third switching device T3 as an N-channel metal-oxide-semiconductor field-effect transistor and the fourth switching device T4 as a P-channel metal-oxide-semiconductor field-effect transistor as an example, the first electrode T of the third switch... 31For the gate, the second electrode of the third switch T 32 The drain is the third terminal of the third switch, T. 33 Source; fourth switch, first electrode T 41 Gate, fourth switch, second electrode T 42 The source is the fourth switch, and the third electrode is T. 43 It is the drain electrode.
[0108] As shown in Figure 4, the voltage divider network 200 includes a second resistor R2 and a third resistor R3.
[0109] One end of the second resistor R2 serves as the network voltage input port 200a of the voltage divider network 200. The other end of the second resistor R2 is connected to one end of the third resistor R3 and serves as the enable signal port 200b of the voltage divider network 200. The other end of the third resistor R3 is connected to a reference potential. Preferably, this reference potential is ground potential.
[0110] As shown in Figure 5, the power supply optional circuit also includes diode D;
[0111] The anode of diode D is connected to the selective control voltage input port 100d, and the cathode of diode D is connected to the selective control voltage output port 100e.
[0112] As described above, in the diode connection method, the anode of diode D is connected to the second terminal T of the fourth switch. 42 The connection is made between the cathode of diode D and the third terminal T of the fourth switch. 43 Connection. Since the fourth switch is a P-channel metal-oxide-semiconductor field-effect transistor, its conduction condition is that the gate-source voltage is less than its conduction threshold voltage. After diode D conducts, the third electrode T of the fourth switch... 43 Due to the clamping effect of the diode, its voltage level is approximately equal to the potential of the voltage output port 300c. In some embodiments, the potential of the voltage output port 300c is set to 12V, while the low-level amplitude controlling the conduction of the fourth switching device T4 is approximately 0V. By setting the diode D, the gate-source voltage of the fourth switching device T4 can be made less than its conduction threshold voltage, causing the fourth switching device T4 to turn on quickly.
[0113] The power supply optional circuit also includes: the fourth resistor R4.
[0114] The fourth resistor R4 is connected in series between the control signal output port 100c and the enable signal port 200b. It is used for current limiting.
[0115] In some other embodiments, a power supply circuit, as shown in FIG6, includes the power supply selection circuit described above, a first power supply unit 400, a second power supply unit 500, a second protection circuit 600, a fifth resistor R5, and a sixth resistor R6.
[0116] The second protection circuit 600 is connected to the load 900. The load 900 has two operating states: light load 910 and heavy load 920.
[0117] The first power supply unit 400 has a first voltage output port 400a for providing a first power supply voltage.
[0118] The second power supply unit 500 has: a second voltage output port 500a, a load signal output port 500b, and a load status receiving port 500c.
[0119] The second voltage output port 500a is used to provide a second power supply voltage.
[0120] The load signal output port 500b is connected to the control signal input port 100a, and is used to generate control signals based on the load status signals and transmit the control signals to the selection control module 100.
[0121] The load status receiving port 500c is used to acquire load status signals.
[0122] The first power supply voltage and the second power supply voltage can be voltages with the same voltage amplitude, or they can be voltages with different voltage amplitudes. In the embodiments described in this application, preferably, the first power supply voltage and the second power supply voltage have the same amplitude.
[0123] The load status signal indicates the load status of the power supply circuit, which includes light load or heavy load. Taking the memory power supply circuit as an example, the number of memory modules connected to the power supply circuit can be used as the basis for distinguishing between light and heavy load. For example, connecting two or fewer memory modules is considered light load; connecting three or more memory modules is considered heavy load.
[0124] The control signal is generated based on the load status signal, corresponding to light or heavy load conditions; the power supply selection circuit selects the appropriate power supply unit based on the load status.
[0125] The first voltage output port 400a is connected to the power input port 300a, supplying power to the first protection circuit 300 with the output voltage of the first power supply unit 400 and the power of the first power. The first voltage output port 400a is also connected to the network voltage input port 200a, providing the operating voltage to the voltage divider network 200.
[0126] The second voltage output port 500a is connected to the selective control voltage output port 100e to form a second power supply branch, providing the load with electrical energy with the output voltage of the second power supply unit 500 and the power of the second power.
[0127] Typically, the second power is greater than the first power. The first power supply unit 400 supplies power to the load when the power supply circuit is lightly loaded; the second power supply unit 500 supplies power to the load when the power supply circuit is heavily loaded.
[0128] A fifth switching device T5 is provided in the second power supply unit 500. Preferably, the fifth switching device T5 is an N-channel metal-oxide-semiconductor field-effect transistor. The gate of the fifth switching device serves as a load state receiving port 500c, its drain serves as a load signal output port 500b, and its source is grounded.
[0129] After receiving a low load signal at the load status receiving port 500c, the power supply to the second power supply branch is turned off. Simultaneously, the fifth switching device T5 is turned off. The potential at the load signal output port 500b is pulled high, and a high level is output to the control signal input port 100a as a control signal. Under the action of the control signal, power is supplied to the load from the first power supply branch, and the first power supply unit 400 provides the load with electrical energy at the output voltage of the first power supply unit 400 and at the first power level.
[0130] After receiving a high load signal at the load status receiving port 500c, the second power supply branch is enabled to supply power to the load. Simultaneously, the fifth switching device T5 is turned on. The potential at the load signal output port 500b is pulled low, and a low level is output to the control signal input port 100a as a control signal. Under the action of the control signal, the first power supply branch is turned off. Therefore, only the second power supply unit 500 provides the load with electrical energy at the output voltage of the second power supply unit 500 and at the second power level.
[0131] The second protection circuit 600 is connected in series between the selectable voltage output port 100e and the load. Optionally, the second protection circuit 600 is a fuse.
[0132] One end of the fifth resistor R5 is connected to the load status receiving port, and the other end of the fifth resistor R5 is connected to the operating voltage used to provide the logic level.
[0133] One end of the sixth resistor R6 is connected to the selector pull-up port, and the other end of the sixth resistor R6 is connected to the working voltage used to provide the logic level.
[0134] Optionally, the other end of the fifth resistor R5 is connected to the other end of the sixth resistor R6, and both are powered by the same operating voltage.
[0135] Preferably, the operating voltage is provided by the first power supply unit 400, and the amplitude of the operating voltage is 3.3V.
[0136] The power supply optional circuit includes: a selection control module, a voltage divider network, and a first protection circuit;
[0137] The first protection circuit is connected to the selection control module to form the first power supply branch. The first protection circuit is also connected to the selection control module and the voltage divider network to form the signal branch.
[0138] The selection control module is used to acquire the control signal, generate an enable signal corresponding to the control signal in conjunction with the voltage divider network, and transmit the enable signal to the first protection circuit through the signal branch, so as to turn on or off the first power supply branch according to the level state of the control signal.
[0139] A voltage divider network is used to generate an enable signal adapted to the first protection circuit based on the control signal.
[0140] The first protection circuit is used to output the power supply voltage obtained from its power input port to the selection control module when the enable signal enables the first protection circuit.
[0141] Specifically, the selection control module has: a control signal input port, a selection control pull-up port, a control signal output port, a selection control voltage input port, and a selection control voltage output port;
[0142] The voltage divider network has: a network voltage input port and an enable signal port;
[0143] The first protection circuit also includes: an enable input port and a voltage output port;
[0144] The control signal input port is used to receive control signals, the selective pull-up port is used to obtain the working voltage for processing control signals, the selective voltage output port is used to provide voltage to the load, the network voltage input port is used to obtain the working voltage for the voltage divider network, the control signal output port is connected to the enable signal port and the enable input port, and the selective voltage input port is connected to the voltage output port.
[0145] Specifically, the selected control module includes: a first control unit and a second control unit;
[0146] The first control unit is used to determine the enable signal based on the control signal;
[0147] The second control unit is used to output the voltage transmitted from the voltage output port of the first protection circuit after the first protection circuit is enabled.
[0148] Specifically, the first control unit has: a first control port, a second control port, and a third control port;
[0149] The second control unit has: a fourth control port, a fifth control port, and a sixth control port;
[0150] The first control port and the fourth control port are connected to serve as the control signal input port, the second control port serves as the selective control pull-up port, the third control port serves as the control signal output port, the fifth control port serves as the selective control voltage input port, and the sixth control port serves as the selective control voltage output port.
[0151] Specifically, the first control unit includes a first switching device and a second switching device;
[0152] The first switching device has: a first switch first pole, a first switch second pole, and a first switch third pole;
[0153] The second switching device has: a first pole of the second switch, a second pole of the second switch, and a third pole of the second switch;
[0154] The first pole of the first switch serves as the first control port, the second pole of the first switch is connected to the first pole of the second switch to serve as the second control port, and the second pole of the second switch serves as the third control port.
[0155] Preferably, both the first switching device and the second switching device are N-channel metal-oxide-semiconductor field-effect transistors.
[0156] Specifically, the second control unit includes: a third switching device and a fourth switching device;
[0157] The third switching device has: a first pole of the third switch, a second pole of the third switch, and a third pole of the third switch;
[0158] The fourth switching device has: a first pole of the fourth switch, a second pole of the fourth switch, and a third pole of the fourth switch;
[0159] The first pole of the third switch is connected to the fourth control port, the second pole of the third switch is connected to the first pole of the fourth switch, the second pole of the fourth switch is connected to the fifth control port, and the third pole of the fourth switch is connected to the sixth control port.
[0160] Preferably, the second control unit further includes a first resistor;
[0161] The first resistor is connected in parallel between the first terminal of the fourth switch and the third terminal of the fourth switch.
[0162] Preferably, the third switching device is an N-channel metal-oxide-semiconductor field-effect transistor, and the fourth switching device is a P-channel metal-oxide-semiconductor field-effect transistor.
[0163] Specifically, the voltage divider network includes a second resistor and a third resistor;
[0164] One end of the second resistor serves as the network voltage input port of the voltage divider network, and the other end of the second resistor is connected to one end of the third resistor to serve as the enable signal port of the voltage divider network.
[0165] Preferably, the power supply optional circuit also includes diodes;
[0166] The anode of the diode is connected to the selective control voltage input port, and the cathode of the diode is connected to the selective control voltage output port.
[0167] Preferably, the power supply optional circuit further includes: a fourth resistor;
[0168] The fourth resistor is connected in series between the control signal output port and the enable signal port.
[0169] The power supply circuit principle is explained separately for light and heavy load scenarios. Taking the memory power supply circuit as an example, the load is a dual-inline-memory module (DIMM), and the first protection circuit 300 uses a device of model MP5325C. When the load consists of one or two DIMMs, the load is light; when the load consists of three or more DIMMs (usually three or four), the load is heavy. The first power supply unit provides 12V, 75W of power; the second power supply unit provides 12V, 150W of power.
[0170] When the load is lightly loaded, a low-load signal is used as the load status signal and transmitted to the load status receiving port 500c. Upon receiving the low-load signal, the load status receiving port 500c shuts off the power supply to the second power supply branch. Simultaneously, it shuts off the fifth switching device T5. The potential of the load signal output port 500b is pulled high, and a high level is output to the control signal input port 100a as a control signal. Under the action of the high-level control signal, the first switching device T1 is turned on, the second switching device T2 is turned off, the third switching device T3 is turned on, and the fourth switching device T4 is turned on. After voltage division by the voltage divider network 200, a high level is transmitted to the enable input port 300b. The first protection circuit 300 receives the high level and is enabled, turning on the first power supply branch. The output voltage of the first power supply unit 400 is output from the selectable voltage output port 100e after passing through the selectable voltage input port 100d. The second protection circuit 600 then provides 12V, 75W of power to the load. It should be noted that the function of diode D is to increase the conduction speed of the fourth switching device T4 when it is not conducting, thereby enabling the first power supply branch to conduct quickly; after it conducts, it prevents current backflow.
[0171] When the load is heavy, a high load signal is used as the load status signal and transmitted to the load status receiving port 500c. Upon receiving the high load signal, the load status receiving port 500c enables the power supply to the second power supply branch. Simultaneously, it turns off the fifth switching device T5. The potential of the load signal output port 500b is pulled low, and a low level is output to the control signal input port 100a as a control signal. Under the action of the low-level control signal, the first switching device T1 turns off, the second switching device T2 turns on, the third switching device T3 turns off, and the fourth switching device T4 turns off. After voltage division by the voltage divider network 200, a low level is transmitted to the enable input port 300b. The first protection circuit 300 receives the low level and is turned off, disconnecting the first power supply branch. At this time, only the second power supply unit 500 provides 12V, 75W of power to the load via the second protection circuit 600.
[0172] Preferably, the port for transmitting electrical energy to the load is a gold finger. Whether the first power supply unit 400 or the second power supply unit 500 supplies power to the load, the power supply port of this gold finger is reused. Furthermore, the two power supply branches do not supply power to the load simultaneously, avoiding the current sharing problem that exists when two power sources supply power at the same time.
[0173] In other embodiments, a circuit board includes the power supply selection circuit described in the first aspect, or the power supply circuit described in the second aspect.
[0174] In other embodiments, as shown in FIG7, a power supply method applied to the power supply matching circuit described in the first aspect, or the power supply circuit described in the second aspect, includes:
[0175] S100: Connect the first voltage output port to the power input port, connect the second voltage output port to the selective control voltage input port, and connect the load signal output port to the control signal input port;
[0176] S200: In response to the load power being less than the preset power, a control signal with a level state of the first level state is acquired to generate an enable signal for enabling the first protection circuit and disconnect the second power supply branch.
[0177] S300: According to the enable signal, enable the first protection circuit to conduct the first power supply branch, so that the first power supply unit supplies power to the load.
[0178] Optionally, the power supply method also includes:
[0179] S200′: In response to the load power being greater than or equal to a preset power, a control signal with a level state of the second level state is obtained to enable the second power supply unit, and an enable signal for shutting down the first protection circuit is generated to disconnect the first power supply branch, so that the second power supply unit supplies power to the load.
[0180] By implementing the power supply selection circuit described in the embodiments of this application, the conduction or cutoff of the first power supply branch can be switched according to the load change. The diode can quickly turn on the fourth switching device, so that the first power supply branch is quickly turned on, and after the fourth switching device is turned on, it prevents the current conduit. The power supply circuit can switch the power supply path according to the load change. For the change of memory load power, no additional interface is added, and the power supply of the corresponding power is switched to supply power to the load, and there is no need to consider the current sharing problem. The power supply method can quickly adjust the appropriate power supply unit to supply power to the load according to the change of load state.
[0181] All of the above-mentioned optional technical solutions can be combined in any way to form the optional embodiments of this application, and will not be described in detail here.
[0182] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A power supply selection circuit, characterized in that, include: Select the control module, voltage divider network, and first protection circuit; The first protection circuit is connected to the selection control module to form a first power supply branch. The first protection circuit is also connected to the selection control module and the voltage divider network to form a signal branch. The selection control module is used to acquire a control signal, cooperate with the voltage divider network to generate an enable signal corresponding to the control signal, and transmit the enable signal to the first protection circuit through the signal branch, so as to turn on or off the first power supply branch according to the level state of the control signal. The voltage divider network is used to generate an enable signal adapted to the first protection circuit based on the control signal. The first protection circuit is configured to output the power supply voltage obtained from its power input port to the selection control module when the enable signal enables the first protection circuit.
2. The power supply selection circuit according to claim 1, characterized in that, The selection control module has: a control signal input port, a selection pull-up port, a control signal output port, a selection voltage input port, and a selection voltage output port; The voltage divider network has: a network voltage input port and an enable signal port; The first protection circuit also includes: an enable input port and a voltage output port; The control signal input port is used to receive control signals, the selective pull-up port is used to obtain the operating voltage for processing the control signals, the selective voltage output port is used to provide voltage to the load, the network voltage input port is used to obtain the operating voltage for the voltage divider network to operate, the control signal output port is connected to the enable signal port and the enable input port, and the selective voltage input port is connected to the voltage output port.
3. The power supply selection circuit according to claim 1 or 2, characterized in that, The selection control module includes: a first control unit and a second control unit; The first control unit is configured to determine the enable signal based on the control signal; The second control unit is configured to output the voltage transmitted from the voltage output port of the first protection circuit after the first protection circuit is enabled.
4. The power supply selection circuit according to claim 3, characterized in that, The first control unit has: a first control port, a second control port, and a third control port; The second control unit has: a fourth control port, a fifth control port, and a sixth control port; The first control port is connected to the fourth control port and serves as the control signal input port. The second control port serves as the selective control pull-up port. The third control port serves as the control signal output port. The fifth control port serves as the selective control voltage input port. The sixth control port serves as the selective control voltage output port.
5. The power supply selection circuit according to claim 4, characterized in that, The first control unit includes a first switching device and a second switching device; The first switching device has: a first switch first pole, a first switch second pole, and a first switch third pole; The second switching device has: a first pole of the second switch, a second pole of the second switch, and a third pole of the second switch; The first pole of the first switch serves as the first control port, the second pole of the first switch is connected to the first pole of the second switch to serve as the second control port, and the second pole of the second switch serves as the third control port.
6. The power supply selection circuit according to claim 5, characterized in that, Both the first and second switching devices are N-channel metal-oxide-semiconductor field-effect transistors.
7. The power supply selection circuit according to claim 4, characterized in that, The second control unit includes: a third switching device and a fourth switching device; The third switching device has: a first pole of the third switch, a second pole of the third switch, and a third pole of the third switch; The fourth switching device has: a first pole of the fourth switch, a second pole of the fourth switch, and a third pole of the fourth switch; The first pole of the third switch serves as the fourth control port, the second pole of the third switch is connected to the first pole of the fourth switch, the second pole of the fourth switch serves as the fifth control port, and the third pole of the fourth switch serves as the sixth control port.
8. The power supply selection circuit according to claim 7, characterized in that, The second control unit further includes a first resistor; the first resistor is connected in parallel between the first terminal of the fourth switch and the third terminal of the fourth switch.
9. The power supply selection circuit according to claim 7, characterized in that, The third switching device is an N-channel metal-oxide-semiconductor field-effect transistor, and the fourth switching device is a P-channel metal-oxide-semiconductor field-effect transistor.
10. The power supply selection circuit according to claim 1 or 2, characterized in that, The voltage divider network includes a second resistor and a third resistor; One end of the second resistor serves as the network voltage input port of the voltage divider network, and the other end of the second resistor is connected to one end of the third resistor to serve as the enable signal port of the voltage divider network.
11. The power supply selection circuit according to claim 1 or 2, characterized in that, The power supply optional circuit also includes diodes; The anode of the diode is connected to the selective control voltage input port, and the cathode of the diode is connected to the selective control voltage output port.
12. The power supply selection circuit according to claim 1 or 2, characterized in that, The power supply optional circuit also includes: a fourth resistor; The fourth resistor is connected in series between the control signal output port and the enable signal port.
13. The power supply selection circuit according to claim 1, characterized in that, The first protection circuit includes an electronic fuse.
14. The power supply selection circuit according to claim 1, characterized in that, The enable signal is in the form of a logic level, which includes low level and high level.
15. The power supply selection circuit according to claim 1, characterized in that, The first protection circuit is connected in series between the power supply voltage and the selection control module, and is turned on or off by the enable signal to control whether the power supply voltage is provided to the selection control module.
16. A power supply circuit, characterized in that, The power supply circuit includes the power supply selection circuit, the first power supply unit, the second power supply unit, the second protection circuit, the fifth resistor, and the sixth resistor as described in any one of claims 1-15; The first power supply unit has: a first voltage output port; The second power supply unit has: a second voltage output port, a load signal output port, and a load status receiving port; The first voltage output port is connected to the power input port to supply power to the first protection circuit. The second voltage output port is connected to the selective control voltage output port to form a second power supply branch. The load signal output port is connected to the control signal input port to generate a control signal based on the load status signal and transmit the control signal to the selective control module. The load status receiving port is used to acquire the load status signal. The second protection circuit is connected in series between the selectable voltage output port and the load. One end of the fifth resistor is connected to the load status receiving port, and one end of the sixth resistor is connected to the selectable pull-up port.
17. The power supply circuit according to claim 16, characterized in that, The load status signal is used to indicate the load status connected to the power supply circuit, and the load status includes light load or heavy load.
18. A circuit board, characterized in that, The circuit board includes the power supply circuit as described in claim 16 or claim 17.
19. A power supply method, characterized in that, The power supply circuit applied to any one of claims 16-17 includes: connecting a first voltage output port to a power input port, connecting a second voltage output port to a selectable voltage input port, and connecting a load signal output port to a control signal input port; In response to a load power less than a preset power, a control signal with a level of the first level is acquired to generate an enable signal for enabling the first protection circuit and to disconnect the second power supply branch; and According to the enable signal, the first protection circuit is enabled to conduct the first power supply branch, so that the first power supply unit supplies power to the load.
20. The power supply method according to claim 19, characterized in that, The method further includes: In response to a load power greater than or equal to a preset power, a control signal with a level state of the second level state is acquired to enable the second power supply unit, and an enable signal for shutting down the first protection circuit is generated to disconnect the first power supply branch, so that the second power supply unit supplies power to the load.