CN115065220B - Switching power supply circuit for board card power supply - Google Patents
Switching power supply circuit for board card power supply Download PDFInfo
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- CN115065220B CN115065220B CN202210880904.2A CN202210880904A CN115065220B CN 115065220 B CN115065220 B CN 115065220B CN 202210880904 A CN202210880904 A CN 202210880904A CN 115065220 B CN115065220 B CN 115065220B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/189—Power distribution
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
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- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
The application discloses a switching power supply circuit for board card power supply, which comprises: a switch driving circuit and a power supply main control circuit; the PWM pin input of the power supply main control circuit is connected with the PWM pin of the switch driving circuit, the CS pin of the power supply main control circuit is respectively connected with the IOUT pin of the switch driving circuit and the REFIN pin of the switch driving circuit, the VCCS pin input of the power supply main control circuit is connected with the REFIN pin of the switch driving circuit, and the TEMP pin output of the power supply main control circuit is connected with the TOUT pin of the switch driving circuit. The switching power supply circuit for board card power supply has the following effects: the circuit is simplified, the number and the variety of parts are reduced, the space area of the power circuit occupied by the PCB is reduced, and the production and processing difficulty is reduced.
Description
Technical Field
The application relates to the technical field of power supply circuits, in particular to a switching power supply circuit for supplying power to a board card.
Background
The CPU power supply is the core of the whole power supply module, which not only determines whether the processor mounted on the body can work normally, but also determines whether the processor can play a complete role, so that the power supply performance of the main board influences whether the computer system can work stably or not, and the existing HIGH-performance power supply scheme of the board card consists of elements such as a power supply main control IC, a driving IC, a HIGH MOSFET, a LOW MOSFET and the like. The drive IC is required to be connected with a plurality of separated MOSFETs, so that the occupied PCB space area of a power circuit is increased, the circuit of the power supply scheme is complex, the debugging time is increased, the number and the variety of parts are increased, and the production and processing difficulty is increased.
Disclosure of Invention
The application aims to provide a switching power supply circuit for supplying power to a board card, which simplifies the circuit, reduces the number and types of parts used, reduces the space area of a PCB occupied by the power supply circuit and reduces the difficulty of production and processing.
The above object of the present application is achieved by the following technical solutions:
The application provides a switching power supply circuit for board card power supply, which comprises: a switch driving circuit and a power supply main control circuit; the PWM pin input of the power supply main control circuit is connected with the PWM pin of the switch driving circuit, the CS pin of the power supply main control circuit is respectively connected with the IOUT pin of the switch driving circuit and the REFIN pin of the switch driving circuit, the VCCS pin input of the power supply main control circuit is connected with the REFIN pin of the switch driving circuit, and the TEMP pin output of the power supply main control circuit is connected with the TOUT pin of the switch driving circuit.
As an improvement of the above-described aspect, the switch driving circuit includes: a first driver and a second driver; the first driver further comprises a first inductor and a first output protection capacitor, the SW pin of the first driver is connected with a first voltage end through a first inductor input in series, the VOS pin of the first driver is connected with the first voltage end, and the first end of the first output protection capacitor is grounded and the second end of the first output protection capacitor is connected with a circuit between the first inductor and the first voltage end in parallel; the second driver further comprises a second inductor and a second output protection capacitor, the SW pin of the second driver is connected with a second voltage end through a series connection of a second inductor input, the VOS pin of the second driver is connected with the second voltage end, the first end of the second output protection capacitor is grounded, and the second end of the second output protection capacitor is connected in parallel with a circuit between the second inductor and the second voltage end; the first driver and the second driver are DrMOS chips with the same chip model.
As an improvement of the above scheme, the first VSEN pin of the power supply main control circuit is feedback connected to VCCCORE _sense terminal, and the first RGND pin of the power supply main control circuit is feedback connected to VSSCORE _sense terminal; the second VSEN pin of the power master circuit is feedback connected to VCCGT _sense terminal, and the second RGND pin of the power master circuit is feedback connected to VSSGT _sense terminal.
As an improvement of the scheme, the power supply main control circuit further comprises a first compensation capacitor, a second compensation capacitor, a first compensation resistor, a second compensation resistor, a third compensation resistor, a fourth compensation resistor, a first input compensation resistor, a second input compensation resistor, a feedback protection resistor and a feedback protection capacitor; the first end of the first compensation capacitor is connected in parallel with a circuit between the VCCCORE _sense end and the first VSEN pin to form a first common end, and the second end of the first compensation capacitor is connected in parallel with a circuit between the VSSCORE _sense end and the first RGND pin to form a second common end; the first end of the second compensation capacitor is connected in parallel with a circuit between the VCCGT _sense end and the second VSEN pin and forms a third common end, and the second end of the second compensation capacitor is connected in parallel with a circuit between the VSSGT _sense end and the second RGND pin and forms a fourth common end; the first compensation resistor is arranged on a line between the VCCCORE _sense end and the first common end, the second compensation resistor is arranged on a line between the VSSCORE _sense end and the second common end, the third compensation resistor is arranged on a line between the VCCGT _sense end and the third common end and the VSSGT _sense end, and the fourth compensation resistor is arranged on a line between the VCCGT _sense end and the fourth common end; the first voltage end is connected in parallel with a circuit between the first compensation resistor and the first common end through the first input compensation resistor in series to form a fifth common end, and the second voltage end is connected in parallel with a circuit between the second compensation resistor and the second common end through the second input compensation resistor in series to form a sixth common end; the first end of the feedback protection resistor and the first end of the feedback protection capacitor are grounded, the second end of the feedback protection resistor is respectively connected with a circuit between the second compensation resistor and the second common end and a circuit between the fourth compensation resistor and the fourth common end, and the second end of the feedback protection capacitor is respectively connected with a circuit between the fifth common end and the first common end, a circuit between the second compensation resistor and the second common end, a circuit between the sixth common end and the third common end and a circuit between the fourth compensation resistor and the fourth common end.
As an improvement of the scheme, the power supply main control circuit further comprises a time sequence line, and the power supply main control circuit further comprises a first output capacitor; an EN pin of the power supply main control circuit is connected with the time sequence line, and a PG pin of the power supply main control circuit is respectively connected with a third voltage end and a VR_READY interface; the first end of the first output capacitor is grounded, and the second end of the first output capacitor is connected in parallel with a circuit between the timing circuit and the EN pin.
As an improvement of the scheme, the power supply main control circuit further comprises a first input protection resistor, a second input protection resistor and a third input protection resistor; the PMSCL pin of the power supply main control circuit is connected with the PMSCL interface and is connected with a third voltage end through the input of the first input protection resistor in series; the PMSDA pin of the power supply main control circuit is connected with the PMSDA interface and is connected with a third voltage end through the input of the second input protection resistor in series; and a nPMALERT pin of the power supply main control circuit is connected with the nPMALERT interface and is connected with a third voltage end through a third input protection resistor input connected in series.
As an improvement of the scheme, the power supply main control circuit further comprises a second output capacitor, a first protection resistor and a second protection resistor; the SVCLK pin of the power supply main control circuit is respectively connected with an H_SVID_CLK interface and a fourth voltage end through the first protection resistor in series connection, the nSVALERT pin of the power supply main control circuit is respectively connected with an H_SVID_ALERT interface and the fourth voltage end, the SVDATA pin of the power supply main control circuit is respectively connected with an H_SVID_DAT interface and the fourth voltage end, and the nVRHOT pin of the power supply main control circuit is connected with an H_PROCHOT_N interface through the second protection resistor in series connection; the fourth voltage end is grounded through the second output capacitor connected in series.
As an improvement of the scheme, the power supply main control circuit further comprises a third protection resistor, a fourth protection resistor, a first output protection resistor and a second output protection resistor; an AUX_IMON pin of the power supply main control circuit is connected with a CPU_AUX_IMON input interface through a third protection resistor input in series, and is grounded through a first output protection resistor in series; the CFP pin of the power supply main control circuit is connected with a CPU_CFP interface; the PSYS pin of the power supply main control circuit is connected with a CPU_ PSYS interface through a fourth protection resistor in series connection, and is grounded through a second output protection resistor in series connection; and a TP test point is arranged between the PSYS pins and the CPU_ PSYS interface.
As an improvement of the scheme, the power supply main control circuit further comprises a third output protection resistor, a third output capacitor, a fourth output protection resistor, a sixth output protection resistor, a fourth output capacitor and a fifth output capacitor; the first driver further comprises a fifth output protection resistor and a third output protection capacitor; the second driver further comprises a seventh output protection resistor and a fourth output protection capacitor; one CS pin of the power supply main control circuit is connected with an IOUT pin of the first driver through a third output protection resistor in series connection, and is connected with a REFIN pin of the first driver through a third output capacitor in series connection; the other CS pin of the power supply main control circuit is connected with the IOUT pin of the second driver through the fourth output protection resistor in series connection, and is connected with the REFIN pin of the second driver through the fourth output capacitor in series connection; the VCCS pin of the power supply main control circuit is connected with the REFIN pin of the first driver through the fourth output protection resistor and the fifth output protection resistor which are sequentially connected in series, and the REFIN pin of the first driver is grounded through the third output protection capacitor which is connected in series; the VCCS pin is connected with the REFIN pin of the second driver through the fourth output protection resistor and the seventh output protection resistor which are connected in series in sequence, and the REFIN pin of the second driver is grounded through the fourth output protection capacitor which is connected in series; the first end of the fifth output capacitor is grounded, and the second end of the fifth output capacitor is connected to a line between the VCCS pin and the sixth output protection resistor.
As an improvement of the above scheme, the power supply main control circuit further comprises a first input capacitor, a second input capacitor and a first input resistor; the VSYS pin input of the power supply main control circuit is connected with a fifth voltage, and the fifth voltage is grounded through the first input capacitor connected in series; the VCC pin of the power supply main control circuit is connected with the first input resistor in series, the input of the first input resistor is connected with a third voltage, and the third voltage is grounded through the second input capacitor in series; the first driver further comprises a second input resistor, a third input resistor, a first input protection capacitor, a second input protection capacitor, a third input protection capacitor and a fourth input protection capacitor; the VCC pin of the first driver is connected with a sixth voltage through sequentially connecting a first input protection capacitor in parallel and connecting the second input protection capacitor in series, the PVCC pin and the EN pin of the first driver are both connected with the sixth voltage through connecting the second input protection capacitor in parallel in input, and the first input protection capacitor and the second input protection capacitor are both grounded; the VIN pin of the first driver is connected with the fifth voltage through the input of the third input protection capacitor in parallel, and the third input protection capacitor is grounded; the BOOST pin of the first driver is sequentially connected with the fourth input protection capacitor and the third input resistor in series to be connected with the PHASE pin of the first driver; the second driver further comprises a fourth input resistor, a fifth input protection capacitor, a sixth input protection capacitor, a seventh input protection capacitor and an eighth input protection capacitor; the VCC pin of the second driver is connected with the sixth voltage through sequentially connecting a fifth input protection capacitor in parallel and connecting the fourth input resistor in series, the PVCC pin and the EN pin of the second driver are both connected with the sixth voltage through connecting the sixth input protection capacitor in parallel in input, and the fifth input protection capacitor and the sixth input protection capacitor are both grounded; the VIN pin of the second driver is connected with the fifth voltage through the input of the seventh input protection capacitor in parallel, and the seventh input protection capacitor is grounded; and a BOOST pin of the second driver is sequentially connected with the eighth input protection capacitor and the fifth input resistor in series and is connected with a PHASE pin of the second driver.
Compared with the prior art, the switching power supply circuit for board card power supply has the beneficial effects that:
The switching power supply circuit for supplying power to the board card is provided with: the switching drive circuit integrates a drive IC, a HIGH MOSFET and a LOW MOSFET, reduces the number and types of parts used by the switching power supply circuit for supplying power to the board card, reduces the space area occupied by a power supply circuit by a PCB, reduces the circuit complexity of the switching power supply circuit for supplying power to the board card, reduces the production and processing difficulty and also reduces the debugging time.
Drawings
The present application will be described with reference to the accompanying drawings. The drawings of the present application are for illustration purposes only and are for the purpose of describing the embodiments. Other embodiments will be readily apparent to those skilled in the art from the following description, without departing from the principles of the application.
FIG. 1 is a first exploded schematic diagram of a power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 2 is a second exploded schematic diagram of the power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 3 is a third exploded schematic diagram of the power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 4 is a fourth exploded schematic diagram of the power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 5 is a fifth exploded schematic diagram of the power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 6 is a sixth exploded schematic diagram of the power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 7 is a seventh exploded schematic diagram of the power supply master circuit of the switching power supply circuit for board card power supply of the present application;
FIG. 8 is a schematic diagram of a first driver of the switching power supply circuit for board card power supply of the present application;
fig. 9 is a schematic diagram of a first driver of the switching power supply circuit for board power supply of the present application.
Main structure and symbol description:
1. A switch driving circuit; 11. a first driver; 12. a second driver; 2. a power supply main control circuit; 21. a first common terminal; 22. a second common terminal; 23. a third common terminal; 24. a fourth common terminal; 25. a fifth common terminal; 26. a sixth common terminal; LP1, a first inductor; LP2, a second inductance; RP111, fifth output protection resistor; RP112, seventh output protection resistor; RP121, second input resistor; RP122, third input resistor; RP123, fourth input resistor; RP124, fifth input resistance; CP111, first output protection capacitor; CP112, second output protection capacitor; CP113, third output protection capacitor; CP114, fourth output protection capacitor; CP121, first input protection capacitor; CP122, second input protection capacitor; CP123, third input protection capacitor; CP124, fourth input protection capacitor; CP125, fifth input protection capacitor; CP126, sixth input protection capacitor; CP127, seventh input protection capacitor; CP128, eighth input protection capacitor; CP211, first compensation capacitance; CP212, second compensation capacitance; RP221, feedback protection capacitance; CP231, first output capacitance; CP232, second output capacitance; CP233, third output capacitance; CP234, fourth output capacitance; CP241, first input capacitance; CP242, second input capacitance; RP211, a first compensation resistor; RP212, a second compensation resistor; RP213, third compensation resistor; RP214, fourth compensation resistor; RP221, first input compensation resistor; RP222, a second input compensation resistor; RP231, feedback protection resistor; RP241, first input protection resistor; RP242, a second input protection resistor; RP243, a third input protection resistor; RP251, first protection resistor; RP252, a second protection resistor; RP253, a third protection resistor; RP254, fourth protection resistor; RP261, first output protection resistor; RP262, a second output protection resistor; RP263, a third output protection resistor; RP264, fourth output protection resistor; RP264, sixth output protection resistor; RP271, first input resistor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," and the like in this disclosure are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1 to 9, the present embodiment provides a switching power supply circuit for board power supply, the switching power supply circuit for board power supply includes: a switch driving circuit 1 and a power supply main control circuit 2; the PWM pin input of the power supply main control circuit 2 is connected with the PWM pin of the switch driving circuit 1, the CS pin of the power supply main control circuit 2 is respectively connected with the IOUT pin of the switch driving circuit 1 and the REFIN pin of the switch driving circuit 1, the VCCS pin input of the power supply main control circuit 2 is connected with the REFIN pin of the switch driving circuit 1, and the TEMP pin output of the power supply main control circuit 2 is connected with the TOUT pin of the switch driving circuit 1.
In the existing power supply line, the power supply main control IC can be connected to the driving IC through two or three separate MOSFETs, so that the line of the power supply line is complex.
In a specific embodiment, the power supply main control circuit 2 is connected with the switch driving circuit 1 through a Pulse Width Modulation (PWM) pin, performs chip selection signal transmission and regulation and control with the switch driving circuit 1 through a Circuit Switch (CS) pin, inputs the chip selection signal into the switch driving circuit 1 through a reference of a virtual circuit switch (VCCS) pin, obtains the running temperature of the processor connected with the switch power supply circuit for supplying power to the board card through a TEMP pin, and conveniently regulates and controls the switch driving circuit 1 and the power supply main control circuit 2 to ensure that the processor is in excellent running performance.
Therefore, the switching power supply circuit for supplying power to the board card reduces the number and the variety of parts used by the switching power supply circuit for supplying power to the board card, reduces the space area occupied by a power supply circuit by a PCB, reduces the circuit complexity of the switching power supply circuit for supplying power to the board card, not only reduces the production and processing difficulty, but also reduces the debugging time.
Referring to fig. 1 to 9, according to an embodiment of the present invention, a switch driving circuit 1 includes: a first driver 11 and a second driver 12; the first driver 11 further includes a first inductor LP1 and a first output protection capacitor CP111, where the SW pin of the first driver 11 is connected to the first voltage end through the input of the first inductor LP1 in series, the VOS pin of the first driver 11 is connected to the first voltage end, and the first end of the first output protection capacitor CP111 is grounded, and the second end is connected to a line between the first inductor LP1 and the first voltage end in parallel; the second driver 12 further includes a second inductor LP2 and a second output protection capacitor CP112, where the SW pin of the second driver 12 is connected to the second voltage end through the input of the second inductor LP2 in series, the VOS pin of the second driver 12 is connected to the second voltage end, and the first end of the second output protection capacitor CP112 is grounded, and the second end is connected to a line between the second inductor LP2 and the second voltage end in parallel; the first driver 11 and the second driver 12 are DrMOS chips of the same chip type.
In a specific embodiment, the first voltage end is +vcore voltage, the second voltage end is + VCCGT voltage, and the PWM pin, the CS pin and the TEMP pin of the power supply main control circuit 2 are respectively provided with two paths and are respectively connected with the first driver 11 and the second driver 12.
The first driver 11 and the second driver 12 are respectively switched to drive each module of the processor, so that the working efficiency of the processor is improved, and the performance of the processor is stabilized.
The first driver 11 and the second driver 12 are DrMOS chips with the same chip model, so that the circuit of the switching power supply circuit for supplying power to the board card is simplified, the space area of the power supply circuit occupied by a PCB is reduced, the use amount of parts is reduced, and the manufacturing cost is reduced.
Referring to fig. 6, according to an embodiment of the present invention, the first VSEN pin of the power supply main control circuit 2 is feedback-connected to VCCCORE _sense terminal, and the first RGND pin of the power supply main control circuit 2 is feedback-connected to VSSCORE _sense terminal; the second VSEN pin of the power master circuit 2 is feedback connected to VCCGT _sense terminal, and the second RGND pin of the power master circuit 2 is feedback connected to VSSGT _sense terminal.
In a specific embodiment, the power supply main control circuit 2 is connected with the CORE module of the processor in a feedback manner through the first VSEN pin and the first RGND pin, and the power supply main control circuit 2 is connected with the GT module of the processor in a feedback manner through the second VSEN pin and the second RGND pin.
Referring to fig. 1 to 9, according to an embodiment of the present invention, the power supply main control circuit 2 further includes a first compensation capacitor CP211, a second compensation capacitor CP212, a first compensation resistor RP211, a second compensation resistor RP212, a third compensation resistor RP213, a fourth compensation resistor RP214, a first input compensation resistor RP221, a second input compensation resistor RP222, a feedback protection resistor RP231, and a feedback protection capacitor RP221; the first end of the first compensation capacitor CP211 is connected in parallel to the line between the VCCCORE _sense end and the first VSEN pin, and forms a first common end 21, and the second end is connected in parallel to the line between the VSSCORE _sense end and the first RGND pin, and forms a second common end 22; the first end of the second compensation capacitor CP212 is connected in parallel to the line between the VCCGT _sense end and the second VSEN pin, and forms a third common end 23, and the second end is connected in parallel to the line between the VSSGT _sense end and the second RGND pin, and forms a fourth common end 24; the first compensating resistor RP211 is arranged on a line between the VCCCORE _sense end and the first common end 21, the second compensating resistor RP212 is arranged on a line between the VSSCORE _sense end and the second common end 22, the third compensating resistor RP213 is arranged on a line between the VCCGT _sense end and the third common end 23 and on a VSSGT _sense end, and the fourth compensating resistor RP214 is arranged on a line between the VSSGT _sense end and the fourth common end 24; the first voltage end is connected in parallel with a circuit between the first compensating resistor RP211 and the first common end 21 through a first input compensating resistor RP221 in series to form a fifth common end 25, and the second voltage end is connected in parallel with a circuit between the second compensating resistor RP212 and the second common end 22 through a second input compensating resistor RP222 in series to form a sixth common end 26; the first end of the feedback protection resistor RP231 and the first end of the feedback protection capacitor RP221 are grounded, the second end of the feedback protection resistor RP231 is connected to the line between the second compensation resistor RP212 and the second common terminal 22, and the line between the fourth compensation resistor RP214 and the fourth common terminal 24, respectively, and the second end of the feedback protection capacitor RP221 is connected to the line between the fifth common terminal 25 and the first common terminal 21, the line between the second compensation resistor RP212 and the second common terminal 22, the line between the sixth common terminal 26 and the third common terminal 23, and the line between the fourth compensation resistor RP214 and the fourth common terminal 24, respectively.
In the specific embodiment, the feedback output lines of the power supply main control circuit 2 and the first driver 11 are protected by the first compensation capacitor CP211, the first compensation resistor RP211, the second compensation resistor RP212, the first input compensation resistor RP221, the feedback protection resistor RP231, and the feedback protection capacitor RP 221.
The feedback output lines of the power supply main control circuit 2 and the second driver 12 are protected by the second compensation capacitor CP212, the third compensation resistor RP213, the fourth compensation resistor RP214, the second input compensation resistor RP222, the feedback protection resistor RP231, and the feedback protection capacitor RP 221.
Referring to fig. 1 to 5, according to an embodiment of the present invention, the power supply master control circuit 2 further includes a timing circuit, and a first output capacitor CP231; the EN pin of the power supply main control circuit 2 is connected with a time sequence line, and the PG pin of the power supply main control circuit 2 is respectively connected with a third voltage end and a VR-READY interface; the first output capacitor CP231 has a first terminal grounded and a second terminal connected in parallel to the line between the timing line and the EN pin.
In a specific embodiment, the switching power supply circuit for supplying power to the board card has a time sequence circuit function.
Referring to fig. 1 to 4 and 7, according to an embodiment of the present invention, the power supply main control circuit 2 further includes a first input protection resistor RP241, a second input protection resistor RP242, and a third input protection resistor RP243; the PMSCL pin of the power supply main control circuit 2 is connected with the PMSCL interface and is connected with a third voltage end through the input of the first input protection resistor RP241 connected in series; the PMSDA pin of the power supply main control circuit 2 is connected with the PMSDA interface and is input and connected with a third voltage end through a second input protection resistor RP242 connected in series; the nPMALERT pin of the power supply main control circuit 2 is connected to the nPMALERT interface, and is connected to the third voltage terminal through the input of the third input protection resistor RP243 connected in series.
In a specific embodiment, the third voltage terminal is +3vs voltage, and the voltages respectively output to the PMSCL pin, the PMSDA pin, and the nPMALERT pin of the power supply main control circuit 2 are input-protected by the first input protection resistor RP241, the second input protection resistor RP242, and the third input protection resistor RP 243.
Referring to fig. 1 to 5, according to an embodiment of the present invention, the power supply main control circuit 2 further includes a second output capacitor CP232, a first protection resistor RP251 and a second protection resistor RP252; the SVCLK pin of the power supply main control circuit 2 is respectively connected with an H_SVID_CLK interface and a fourth voltage end through a first protection resistor RP251 which is connected in series, the nSVALERT pin of the power supply main control circuit 2 is respectively connected with an H_SVID_ALERT interface and a fourth voltage end, the SVDATA pin of the power supply main control circuit 2 is respectively connected with an H_SVID_DAT interface and a fourth voltage end, and the nVRHOT pin of the power supply main control circuit 2 is connected with an H_PROCHOT_N interface through a second protection resistor RP252 which is connected in series; the fourth voltage terminal is grounded through the series second output capacitor CP 232.
In a specific embodiment, the fourth voltage end is +v1p05a_proc voltage, and the second output capacitor CP232 is used to input and protect voltages of the fourth voltage end to the SVCLK pin, the nSVALERT pin and the SVDATA pin of the power supply main control circuit 2; the first protection resistor RP251 is used to protect the SVCLK pin of the power supply main control circuit 2, and the second protection resistor RP252 is used to protect the nVRHOT pin of the power supply main control circuit 2.
Referring to fig. 1 to 5 and 7, according to an embodiment of the present invention, the power supply main control circuit 2 further includes a third protection resistor RP253, a fourth protection resistor RP254, a first output protection resistor RP261 and a second output protection resistor RP262; the AUX_IMON pin of the power supply main control circuit 2 is connected with a CPU_AUX_IMON input interface through a serial third protection resistor RP253 input and grounded through a serial first output protection resistor RP 261; the CFP pin of the power supply main control circuit 2 is connected with a CPU_CFP interface; the PSYS pin of the power supply main control circuit 2 is connected with the CPU_ PSYS interface through a fourth protection resistor RP254 in series and is grounded through a second output protection resistor RP262 in series; and a TP test point is arranged between the PSYS pin and the CPU_ PSYS interface.
In a specific embodiment, the aux_imon pin, the CFP pin and the PSYS pin of the power supply master control circuit 2 are protected by using the third protection resistor RP253, the fourth protection resistor RP254, the first output protection resistor RP261 and the second output protection resistor RP262, and debugging by using TP test points is facilitated for engineers.
Referring to fig. 1 to 9, according to an embodiment of the present invention, the power supply main control circuit 2 further includes a third output protection resistor RP263, a third output capacitor CP233, a fourth output protection resistor RP264, a sixth output protection resistor RP264 and a fourth output capacitor CP234; the first driver 11 further includes a fifth output protection resistor RP111 and a third output protection capacitor CP113; the first driver 11 further includes a fifth output protection resistor RP111 and a third output protection capacitor CP113; the second driver 12 further includes a seventh output protection resistor RP112 and a fourth output protection capacitor CP114; one of the CS pins of the power supply main control circuit 2 is connected with the IOUT pin of the first driver 11 through a third output protection resistor RP263 in series, and is connected with the REFIN pin of the first driver 11 through a third output capacitor CP233 in series; the other CS pin of the power supply main control circuit 2 is connected with the IOUT pin of the second driver 12 through a serial fourth output protection resistor RP264, and is connected with the REFIN pin of the second driver 12 through a serial fourth output capacitor CP234; the VCCS pin of the power supply main control circuit 2 is connected with the REFIN pin of the first driver 11 by sequentially connecting the fourth output protection resistor RP264 and the fifth output protection resistor RP111 in series, and the REFIN pin of the first driver 11 is also grounded by connecting the third output protection capacitor CP113 in series; the VCCS pin is input-connected to the REFIN pin of the second driver 12 through a fourth output protection resistor RP264 and a seventh output protection resistor RP112 which are sequentially connected in series, and the REFIN pin of the second driver 12 is grounded through a fourth output protection capacitor CP114 connected in series; the first end of the fifth output capacitor is grounded, and the second end is connected to the line between the VCCS pin and the sixth output protection resistor RP 264.
In a specific embodiment, the third output protection resistor RP263, the third output capacitor CP233, the fourth output protection resistor RP264, the sixth output protection resistor RP264 and the fourth output capacitor CP234 are used to protect the CS pin VCCS pin of the power supply master control circuit 2; the first driver 11 is protected by the fifth output protection resistor RP111 and the third output protection capacitor CP113, and the second driver 12 is protected by the seventh output protection resistor RP112 and the fourth output protection capacitor CP 114.
Referring to fig. 1 to 9, according to an embodiment of the present invention, the power supply main control circuit 2 further includes a first input capacitor CP241, a second input capacitor CP242, and a first input resistor RP271; the VSYS pin input of the power supply main control circuit 2 is connected with a fifth voltage, and the fifth voltage is grounded through a first input capacitor CP241 connected in series; the VCC pin of the power supply main control circuit 2 is connected in series with a first input resistor RP271 and is connected with a third voltage, and the third voltage is grounded through a second input capacitor CP242 connected in series; the first driver 11 further includes a second input resistor RP121, a third input resistor RP122, a first input protection capacitor CP121, a second input protection capacitor CP122, a third input protection capacitor CP123, and a fourth input protection capacitor CP124; the VCC pin of the first driver 11 is input-connected to a sixth voltage through a first input protection capacitor CP121 and a series second input resistor RP121 connected in parallel in sequence, and both the PVCC pin and the EN pin of the first driver 11 are input-connected to the sixth voltage through a parallel second input protection capacitor CP122, and both the first input protection capacitor CP121 and the second input protection capacitor CP122 are grounded; the VIN pin of the first driver 11 is connected with a fifth voltage through a third input protection capacitor CP123 in parallel, and the third input protection capacitor CP123 is grounded; the BOOST pin of the first driver 11 is connected in series with a fourth input protection capacitor CP124 and a third input resistor RP122 in sequence to connect the PHASE pin of the first driver 11; the second driver 12 further includes a fourth input resistor RP123, a fifth input resistor RP124, a fifth input protection capacitor CP125, a sixth input protection capacitor CP126, a seventh input protection capacitor CP127, and an eighth input protection capacitor CP128; the VCC pin of the second driver 12 is input-connected to a sixth voltage by sequentially connecting in parallel a fifth input protection capacitor CP125 and a fourth input resistor RP123 in series, both the PVCC pin and the EN pin of the second driver 12 are input-connected to the sixth voltage by connecting in parallel a sixth input protection capacitor CP126, and both the fifth input protection capacitor CP125 and the sixth input protection capacitor CP126 are grounded; the VIN pin of the second driver 12 is input and connected with a fifth voltage through a seventh input protection capacitor CP127 in parallel, and the seventh input protection capacitor CP127 is grounded; the BOOST pin of the second driver 12 is connected in series with an eighth input protection capacitor CP128 and a fifth input resistor RP124 in turn to the PHASE pin of the second driver 12.
In a specific embodiment, the power supply main control circuit 2 is protected by a first input capacitor CP241, a second input capacitor CP242 and a first input resistor RP 271; the first driver 11 is protected by the second input resistor RP121, the third input resistor RP122, the first input protection capacitor CP121, the second input protection capacitor CP122, the third input protection capacitor CP123, and the fourth input protection capacitor CP 124; the second driver 12 is protected by a fourth input resistor RP123, a fifth input resistor RP124, a fifth input protection capacitor CP125, a sixth input protection capacitor CP126, a seventh input protection capacitor CP127, and an eighth input protection capacitor CP 128.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in other related arts, either directly or indirectly, which fall within the scope of the present application.
Claims (8)
1. A switching power supply circuit for board card power, comprising: the power supply control circuit comprises a switch driving circuit, a power supply main control circuit and a time sequence circuit with a time sequence circuit function, wherein the PWM pin input of the power supply main control circuit is connected with the PWM pin of the switch driving circuit, the CS pin of the power supply main control circuit is respectively connected with the IOUT pin of the switch driving circuit and the REFIN pin of the switch driving circuit, the VCCS pin input of the power supply main control circuit is connected with the REFIN pin of the switch driving circuit, the TEMP pin output of the power supply main control circuit is connected with the TOUT pin of the switch driving circuit, and the PG pin of the power supply main control circuit is respectively connected with a third voltage end and a VR_READY interface; the power supply main control circuit further comprises a first output capacitor;
an EN pin of the power supply main control circuit is connected with the time sequence line;
The first end of the first output capacitor is grounded, and the second end of the first output capacitor is connected in parallel with a circuit between the timing circuit and the EN pin;
The switch driving circuit includes: the first driver and the second driver are DrMOS chips with the same chip model;
The first driver comprises a first inductor and a first output protection capacitor, the SW pin of the first driver is connected with a first voltage end through a first inductor input in series, the VOS pin of the first driver is connected with the first voltage end, and the first end of the first output protection capacitor is grounded and the second end of the first output protection capacitor is connected with a circuit between the first inductor and the first voltage end in parallel;
The second driver comprises a second inductor and a second output protection capacitor, the SW pin of the second driver is connected with a second voltage end through a series connection of a second inductor input, the VOS pin input of the second driver is connected with the second voltage end, and the first end of the second output protection capacitor is grounded and the second end of the second output protection capacitor is connected in parallel with a circuit between the second inductor and the second voltage end.
2. The switching power supply circuit for board card power supply of claim 1 wherein the first VSEN pin feedback of the power supply master circuit is connected to VCCCORE _sense terminal and the first RGND pin feedback of the power supply master circuit is connected to VSSCORE _sense terminal;
the second VSEN pin of the power master circuit is feedback connected to VCCGT _sense terminal, and the second RGND pin of the power master circuit is feedback connected to VSSGT _sense terminal.
3. The switching power supply circuit for board card power supply of claim 2, wherein the power supply main control circuit further comprises a first compensation capacitor, a second compensation capacitor, a first compensation resistor, a second compensation resistor, a third compensation resistor, a fourth compensation resistor, a first input compensation resistor, a second input compensation resistor, a feedback protection resistor, and a feedback protection capacitor;
the first end of the first compensation capacitor is connected in parallel with a circuit between the VCCCORE _sense end and the first VSEN pin to form a first common end, and the second end of the first compensation capacitor is connected in parallel with a circuit between the VSSCORE _sense end and the first RGND pin to form a second common end;
The first end of the second compensation capacitor is connected in parallel with a circuit between the VCCGT _sense end and the second VSEN pin and forms a third common end, and the second end of the second compensation capacitor is connected in parallel with a circuit between the VSSGT _sense end and the second RGND pin and forms a fourth common end;
The first compensation resistor is arranged on a line between the VCCCORE _sense end and the first common end, the second compensation resistor is arranged on a line between the VSSCORE _sense end and the second common end, the third compensation resistor is arranged on a line between the VCCGT _sense end and the third common end, and the fourth compensation resistor is arranged on a line between the VSSGT _sense end and the fourth common end;
The first voltage end is connected in parallel with a circuit between the first compensation resistor and the first common end through the first input compensation resistor in series to form a fifth common end, and the second voltage end is connected in parallel with a circuit between the third compensation resistor and the third common end through the second input compensation resistor in series to form a sixth common end;
The first end of the feedback protection resistor and the first end of the feedback protection capacitor are grounded, the second end of the feedback protection resistor is respectively connected with a circuit between the second compensation resistor and the second common end and a circuit between the fourth compensation resistor and the fourth common end, and the second end of the feedback protection capacitor is respectively connected with a circuit between the fifth common end and the first common end, a circuit between the second compensation resistor and the second common end, a circuit between the sixth common end and the third common end and a circuit between the fourth compensation resistor and the fourth common end.
4. The switching power supply circuit for board card power supply of claim 1 wherein said power supply master control circuit further comprises a first input protection resistor, a second input protection resistor, and a third input protection resistor;
the PMSCL pin of the power supply main control circuit is connected with the PMSCL interface and is connected with a third voltage end through the input of the first input protection resistor in series;
the PMSDA pin of the power supply main control circuit is connected with the PMSDA interface and is connected with a third voltage end through the input of the second input protection resistor in series;
And a nPMALERT pin of the power supply main control circuit is connected with the nPMALERT interface and is connected with a third voltage end through a third input protection resistor input connected in series.
5. The switching power supply circuit for board card power supply of claim 1 wherein said power supply master control circuit further comprises a second output capacitor, a first protection resistor and a second protection resistor;
The SVCLK pin of the power supply main control circuit is respectively connected with an H_SVID_CLK interface and a fourth voltage end through the first protection resistor in series connection, the nSVALERT pin of the power supply main control circuit is respectively connected with an H_SVID_ALERT interface and the fourth voltage end, the SVDATA pin of the power supply main control circuit is respectively connected with an H_SVID_DAT interface and the fourth voltage end, and the nVRHOT pin of the power supply main control circuit is connected with an H_PROCHOT_N interface through the second protection resistor in series connection;
the fourth voltage end is grounded through the second output capacitor connected in series.
6. The switching power supply circuit for board card power supply of claim 1, wherein the power supply main control circuit further comprises a third protection resistor, a fourth protection resistor, a first output protection resistor and a second output protection resistor;
An AUX_IMON pin of the power supply main control circuit is connected with a CPU_AUX_IMON input interface through a third protection resistor input in series, and is grounded through a first output protection resistor in series;
the CFP pin of the power supply main control circuit is connected with a CPU_CFP interface;
the PSYS pin of the power supply main control circuit is connected with a CPU_ PSYS interface through a fourth protection resistor in series connection, and is grounded through a second output protection resistor in series connection;
and a TP test point is arranged between the PSYS pins and the CPU_ PSYS interface.
7. The switching power supply circuit for board card power supply of claim 1, wherein the power supply main control circuit further comprises a third output protection resistor, a third output capacitor, a fourth output protection resistor, a fourth output capacitor, and a fifth output capacitor;
The first driver further comprises a fifth output protection resistor and a third output protection capacitor; the second driver further comprises a seventh output protection resistor and a fourth output protection capacitor;
One CS pin of the power supply main control circuit is connected with an IOUT pin of the first driver through a third output protection resistor in series connection, and is connected with a REFIN pin of the first driver through a third output capacitor in series connection; the other CS pin of the power supply main control circuit is connected with the IOUT pin of the second driver through the fourth output protection resistor in series connection, and is connected with the REFIN pin of the second driver through the fourth output capacitor in series connection;
the VCCS pin of the power supply main control circuit is connected with the REFIN pin of the first driver through the fourth output protection resistor and the fifth output protection resistor which are sequentially connected in series, and the REFIN pin of the first driver is grounded through the third output protection capacitor which is connected in series;
The VCCS pin is connected with the REFIN pin of the second driver through the fourth output protection resistor and the seventh output protection resistor which are connected in series in sequence, and the REFIN pin of the second driver is grounded through the fourth output protection capacitor which is connected in series;
The first end of the fifth output capacitor is grounded, and the second end of the fifth output capacitor is connected to a line between the VCCS pin and the fourth output protection resistor.
8. The switching power supply circuit for board card power supply of claim 1 wherein said power supply master control circuit further comprises a first input capacitor, a second input capacitor and a first input resistor;
The VSYS pin input of the power supply main control circuit is connected with a fifth voltage, and the fifth voltage is grounded through the first input capacitor connected in series;
The VCC pin of the power supply main control circuit is connected with the first input resistor in series, the input of the first input resistor is connected with a third voltage, and the third voltage is grounded through the second input capacitor in series;
the first driver further comprises a second input resistor, a third input resistor, a first input protection capacitor, a second input protection capacitor, a third input protection capacitor and a fourth input protection capacitor;
The VCC pin of the first driver is connected with a sixth voltage through sequentially connecting a first input protection capacitor in parallel and connecting the second input protection capacitor in series, the PVCC pin and the EN pin of the first driver are both connected with the sixth voltage through connecting the second input protection capacitor in parallel in input, and the first input protection capacitor and the second input protection capacitor are both grounded;
the VIN pin of the first driver is connected with the fifth voltage through the input of the third input protection capacitor in parallel, and the third input protection capacitor is grounded;
The BOOST pin of the first driver is sequentially connected with the fourth input protection capacitor and the third input resistor in series to be connected with the PHASE pin of the first driver;
The second driver further comprises a fourth input resistor, a fifth input protection capacitor, a sixth input protection capacitor, a seventh input protection capacitor and an eighth input protection capacitor;
the VCC pin of the second driver is connected with the sixth voltage through sequentially connecting a fifth input protection capacitor in parallel and connecting the fourth input resistor in series, the PVCC pin and the EN pin of the second driver are both connected with the sixth voltage through connecting the sixth input protection capacitor in parallel in input, and the fifth input protection capacitor and the sixth input protection capacitor are both grounded;
The VIN pin of the second driver is connected with the fifth voltage through the input of the seventh input protection capacitor in parallel, and the seventh input protection capacitor is grounded;
And a BOOST pin of the second driver is sequentially connected with the eighth input protection capacitor and the fifth input resistor in series and is connected with a PHASE pin of the second driver.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210880904.2A CN115065220B (en) | 2022-07-25 | 2022-07-25 | Switching power supply circuit for board card power supply |
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| CN202210880904.2A CN115065220B (en) | 2022-07-25 | 2022-07-25 | Switching power supply circuit for board card power supply |
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| CN115065220B true CN115065220B (en) | 2024-04-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017625A (en) * | 2006-07-06 | 2008-01-24 | Renesas Technology Corp | Semiconductor device and switching power supply device |
| CN112180798A (en) * | 2020-10-09 | 2021-01-05 | 珠海格力电器股份有限公司 | Time sequence control circuit, power supply control circuit and frequency converter |
| CN113765340A (en) * | 2020-06-04 | 2021-12-07 | 罗姆股份有限公司 | Power supply control device, drive module and switching power supply device |
| CN216437060U (en) * | 2020-11-27 | 2022-05-03 | 深圳微步信息股份有限公司 | Disconnect-type power supply circuit and power supply unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI381618B (en) * | 2008-12-22 | 2013-01-01 | Asustek Comp Inc | Switching power supply applied and computer system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017625A (en) * | 2006-07-06 | 2008-01-24 | Renesas Technology Corp | Semiconductor device and switching power supply device |
| CN113765340A (en) * | 2020-06-04 | 2021-12-07 | 罗姆股份有限公司 | Power supply control device, drive module and switching power supply device |
| CN112180798A (en) * | 2020-10-09 | 2021-01-05 | 珠海格力电器股份有限公司 | Time sequence control circuit, power supply control circuit and frequency converter |
| CN216437060U (en) * | 2020-11-27 | 2022-05-03 | 深圳微步信息股份有限公司 | Disconnect-type power supply circuit and power supply unit |
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