One-path direct current multi-path output control circuit

Abstract

The utility model belongs to the technical field of output control circuits, and particularly relates to a one-path direct-current multi-path output control circuit, which comprises a DC / DC electric unit, an MCU (Microprogrammed Control Unit) main control unit and a plurality of paths of sub-control units, each sub-control unit comprises a main power conversion unit and a data sampling unit. The signal output end of the DC / DC electric unit is connected with the signal input end of the main power conversion unit, the signal output end of the main power conversion unit is connected with the signal input end of the data sampling unit, and the signal output end of the data sampling unit is connected with the signal input end of the MCU main control unit. The number of paths of the multiple paths of sub-control units can be set according to actual needs, the actual application requirements of diversification of one-path direct-current multi-path output control modes, autonomous control and intelligent distribution are met through the sub-control units, and the multi-path direct-current multi-path output control system is small in size, low in cost and easy to control.

Description

Technical Field

[0001] The utility model belongs to the technical field of output control circuits, and particularly relates to a one-way DC multi-way output control circuit. Background Art

[0002] A multi-way output switching power supply is a power supply that can provide independent output voltage and current for multiple electronic devices. It controls the current and voltage of the input power supply through a switching circuit, and converts them into the voltage and current required by multiple output ports to meet the different power supply requirements of various electronic devices.

[0003] At present, multi-way output DC power modules are being more and more widely used. The main structure topology is the N+N mode, that is, a main output DC module drives N DC modules to achieve the purpose of multi-way output. This circuit topology can achieve multi-way output and isolation, but it is insufficient in the common ground mode, and generally has the disadvantages of high cost, difficult to control, large volume, etc., and cannot achieve more intelligent control and other technical problems.

[0004] Therefore, the present invention actually solves the intelligent control and regulation application of one-way DC multi-way output in the common ground mode from a more intelligent perspective, and has a smaller volume, lower cost, higher power density, and higher efficiency. Content of the Utility Model

[0005] The purpose of the utility model is to provide a one-way DC multi-way output control circuit to solve the intelligent control and regulation application of one-way DC multi-way output in the common ground mode, and to make the DC power module with multi-way output have a smaller volume, lower cost, higher power density, and higher efficiency.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0007] A one-way DC multi-way output control circuit includes a DC / DC power unit, an MCU main control unit, and multiple sub-control units; each sub-control unit includes a main power conversion unit and a data sampling unit;

[0008] The signal output end of the DC / DC power unit is connected to the signal input end of the main power conversion unit, the signal output end of the main power conversion unit is connected to the signal input end of the data sampling unit, and the signal output end of the data sampling unit is connected to the signal input end of the MCU main control unit.

[0009] Preferably, the multiple sub-control units at least include a first sub-control unit and a second sub-control unit. The main power conversion unit of the first sub-control unit includes a first resistor, a second resistor, a fifth resistor, a sixth resistor, a first triode, a third triode, and a first zener diode;

[0010] The center point after the first resistor and the second resistor are connected in series is connected to the base of the third triode, the collector of the third triode is connected to the gate of the first triode, and the center point after the fifth resistor and the sixth resistor are connected in series is connected to the gate of the first triode;

[0011] The positive pole of the first voltage stabilizing diode is respectively connected to the emitter of the third triode and the source of the first triode, the negative pole of the first voltage stabilizing diode is respectively connected to the collector of the third triode and the gate of the first triode, and the first voltage stabilizing diode is connected in parallel with the sixth resistor.

[0012] Preferably, the data sampling unit of the first path control unit includes a ninth resistor, a tenth resistor and a first current sampling resistor, and the ninth resistor and the tenth resistor are connected in series and then connected to the MCU main control unit through the first current sampling resistor.

[0013] Preferably, the first path control unit further includes a third capacitor and a fourth capacitor, the third capacitor and the fourth capacitor are connected in parallel, and one end after parallel connection is connected to the fifth resistor, and the other end is connected to the drain of the first triode.

[0014] Preferably, the main power conversion unit of the second path control unit includes a third resistor, a fourth resistor, a seventh resistor, an eighth resistor, a second triode, a fourth triode and a second voltage stabilizing diode;

[0015] The center point after the third resistor and the fourth resistor are connected in series is connected to the base of the fourth triode, the collector of the fourth triode is connected to the gate of the second triode, and the center point after the seventh resistor and the eighth resistor are connected in series is connected to the gate of the second triode;

[0016] The positive pole of the second voltage stabilizing diode is respectively connected to the emitter of the fourth triode and the source of the second triode, the negative pole of the first voltage stabilizing diode is respectively connected to the collector of the fourth triode and the gate of the second triode, and the second voltage stabilizing diode is connected in parallel with the eighth resistor.

[0017] Preferably, the data sampling unit of the second path control unit includes an eleventh resistor, a twelfth resistor and a second current sampling resistor, and the eleventh resistor and the twelfth resistor are connected in series and then connected to the MCU main control unit through the second current sampling resistor.

[0018] Preferably, the second path control unit further includes a fifth capacitor and a sixth capacitor, the fifth capacitor and the sixth capacitor are connected in parallel, and one end after parallel connection is connected to the seventh resistor, and the other end is connected to the drain of the second triode.

[0019] Preferably, it further includes a first capacitor and a second capacitor, the first capacitor and the second capacitor are connected in parallel, and the DC / DC power unit is respectively connected to the first path control unit and the second path control unit through the parallel-connected first capacitor and second capacitor.

[0020] Preferably, it further includes a monitoring unit, and the monitoring unit includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a first operational amplifier, and a second operational amplifier;

[0021] The thirteenth resistor and the fourteenth resistor are connected in parallel and are respectively connected to both ends of the ninth capacitor. The thirteenth resistor is connected to the non-inverting input terminal of the first operational amplifier, and the fourteenth resistor is connected to the inverting input terminal of the first operational amplifier;

[0022] The tenth capacitor and the eleventh capacitor are connected in parallel and then connected to the negative power supply terminal of the first operational amplifier. The seventh capacitor is connected to the positive power supply terminal of the first operational amplifier. The output terminal of the first operational amplifier is connected to the seventh capacitor through the fifteenth resistor and the eighth capacitor;

[0023] One end of the thirteenth capacitor is respectively connected to the eleventh resistor, the twelfth resistor, and the non-inverting input terminal of the second operational amplifier, and the other end is connected to the output terminal and the inverting input terminal of the second operational amplifier through the twelfth capacitor and the sixteenth resistor. The sixteenth resistor and the twelfth capacitor are both connected to the MCU main control unit.

[0024] The beneficial effects of the present invention include:

[0025] The one-way DC multi-way output control circuit provided by the present invention includes a DC / DC power unit, an MCU main control unit, and multiple path control units; each path control unit includes a main power conversion unit and a data sampling unit. The signal output terminal of the DC / DC power unit is connected to the signal input terminal of the main power conversion unit, the signal output terminal of the main power conversion unit is connected to the signal input terminal of the data sampling unit, and the signal output terminal of the data sampling unit is connected to the signal input terminal of the MCU main control unit. The number of paths of the multiple path control units can be set according to actual needs. Through each path control unit, the practical application requirements of one-way DC multi-way output control mode diversification, independent control, and intelligent distribution are realized, and it has the advantages of small volume, low cost, and easy control. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the one-way DC multi-way output control circuit of the present invention.

[0027] Reference numerals: R1 is the first resistor, R2 is the second resistor, R3 is the third resistor, R4 is the fourth resistor, R5 is the fifth resistor, R6 is the sixth resistor, R7 is the seventh resistor, R8 is the eighth resistor, R9 is the ninth resistor, R10 is the tenth resistor, R11 is the eleventh resistor, R12 is the twelfth resistor, R13 is the thirteenth resistor, R14 is the fourteenth resistor, R15 is the fifteenth resistor, R16 is the sixteenth resistor, ZD1 is the first voltage regulator diode, ZD2 is the second voltage regulator diode, RS1 is the first current sampling resistor, RS2 is the second current sampling resistor, C1 is the first capacitor, C2 is the second capacitor, C3 is the third capacitor, C4 is the fourth capacitor, C5 is the fifth capacitor, C6 is the sixth capacitor, C7 is the seventh capacitor, C8 is the eighth capacitor, C9 is the ninth capacitor, C10 is the tenth capacitor, C11 is the eleventh capacitor, C12 is the twelfth capacitor, C13 is the thirteenth capacitor, Q1 is the first triode, Q2 is the second triode, Q3 is the third triode, Q4 is the fourth triode, U1A is the first operational amplifier, and U1B is the second operational amplifier. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, 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. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0029] The following combines the attached Figure 1 A further detailed description of the present utility model will be given as follows:

[0030] Refer to the attached Figure 1 As shown, a one-way DC multi-way output control circuit includes a DC / DC power unit, an MCU main control unit, and multiple sub-control units; each sub-control unit includes a main power conversion unit and a data sampling unit. The signal output end of the DC / DC power unit is connected to the signal input end of the main power conversion unit, the signal output end of the main power conversion unit is connected to the signal input end of the data sampling unit, and the signal output end of the data sampling unit is connected to the signal input end of the MCU main control unit.

[0031] The number of channels of the multi-channel sub-control unit can be set according to actual needs. Through each channel sub-control unit, the actual application requirements of a DC multi-output control mode with diversification, independent control, and intelligent distribution are realized, featuring a small volume, low cost, and easy control.

[0032] In the above solution, the multi-channel sub-control unit includes at least a first-channel sub-control unit and a second-channel sub-control unit. The main power conversion unit of the first-channel sub-control unit includes a first resistor R1, a second resistor R2, a fifth resistor R5, a sixth resistor R6, a first triode Q1, a third triode Q3, and a first zener diode ZD1. The center point after the series connection of the first resistor R1 and the second resistor R2 is connected to the base of the third triode Q3, the collector of the third triode Q3 is connected to the gate of the first triode Q1, and the center point after the series connection of the fifth resistor R5 and the sixth resistor R6 is connected to the gate of the first triode Q1. The positive electrode of the first zener diode ZD1 is respectively connected to the emitter of the third triode Q3 and the source of the first triode Q1, the negative electrode of the first zener diode is respectively connected to the collector of the third triode Q3 and the gate of the first triode Q1, and the first zener diode ZD1 is connected in parallel with the sixth resistor R6.

[0033] The center point after the series connection of the first resistor R1 and the second resistor R2 is connected to the base of the third triode Q3, the collector of the third triode Q3 is connected to the gate of the first triode Q1, and the center point after the series connection of the fifth resistor R5 and the sixth resistor R6 is also connected to the gate of the first triode Q1, which plays a role in driving and controlling the operation of the first triode Q1.

[0034] The data sampling unit of the first-channel sub-control unit includes a ninth resistor, a tenth resistor R10, and a first current sampling resistor RS1. The ninth resistor and the tenth resistor R10 are connected in series and then connected to the MCU main control unit through the first current sampling resistor RS1. The first current sampling resistor RS1 mainly realizes current sampling and feedback to the MCU main control unit to achieve current control. The base of the third triode Q3 is connected to the PWM1 controlled by the MCU main control unit to achieve control and adjustment.

[0035] The first-channel sub-control unit further includes a third capacitor C3 and a fourth capacitor C4. The third capacitor C3 and the fourth capacitor C4 are connected in parallel. One end after parallel connection is connected to the fifth resistor R5, and the other end is connected to the drain of the first triode Q1. The third capacitor C3 and the fourth capacitor C4 are output filter capacitors. The ninth resistor and the tenth resistor R10 are connected in series for voltage division to transmit the output voltage sampling value to the MCU main control unit to achieve voltage control.

[0036] The main power conversion unit of the second sub-control unit includes a third resistor R3, a fourth resistor R4, a seventh resistor R7, a ninth resistor R9, a second triode Q2, a fourth triode Q4, and a second zener diode ZD2. The center point after the third resistor R3 and the fourth resistor R4 are connected in series is connected to the base of the fourth triode Q4, the collector of the fourth triode Q4 is connected to the gate of the second triode Q2, and the center point after the seventh resistor R7 and the ninth resistor R9 are connected in series is connected to the gate of the second triode Q2. The positive electrode of the second zener diode ZD2 is respectively connected to the emitter of the fourth triode Q4 and the source of the second triode Q2, the negative electrode of the first zener diode is respectively connected to the collector of the fourth triode Q4 and the gate of the second triode Q2, and the second zener diode ZD2 is connected in parallel with the ninth resistor R9.

[0037] The data sampling unit of the second sub-control unit includes an eleventh resistor R11, a twelfth resistor R12, and a second current sampling resistor RS2. The eleventh resistor R11 and the twelfth resistor R12 are connected in series and then connected to the MCU main control unit through the second current sampling resistor RS2. The second sub-control unit further includes a fifth capacitor C5 and a sixth capacitor C6. The fifth capacitor C5 and the sixth capacitor C6 are connected in parallel. One end of the parallel connection is connected to the seventh resistor R7, and the other end is connected to the drain of the second triode Q2.

[0038] This one-way DC multi-output control circuit further includes a first capacitor C1 and a second capacitor C2. The first capacitor C1 and the second capacitor C2 are connected in parallel. The DC / DC power unit is connected to the first sub-control unit and the second sub-control unit respectively through the parallel-connected first capacitor C1 and second capacitor C2.

[0039] The one-way DC multi-output control circuit further includes a monitoring unit, and the monitoring unit includes a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a first operational amplifier U1A, and a second operational amplifier U1B. The thirteenth resistor R13 and the fourteenth resistor R14 are connected in parallel and are respectively connected to both ends of the ninth capacitor C9. The thirteenth resistor R13 is connected to the non-inverting input terminal of the first operational amplifier U1A, and the fourteenth resistor R14 is connected to the inverting input terminal of the first operational amplifier U1A. The tenth capacitor C10 and the eleventh capacitor C11 are connected in parallel and then connected to the negative power supply terminal of the first operational amplifier U1A. The seventh capacitor C7 is connected to the positive power supply terminal of the first operational amplifier U1A. The output terminal of the first operational amplifier U1A is connected to the seventh capacitor C7 through the fifteenth resistor R15 and the eighth capacitor C8. One end of the thirteenth capacitor C13 is respectively connected to the eleventh resistor R11, the twelfth resistor R12, and the non-inverting input terminal of the second operational amplifier U1B, and the other end is connected to the output terminal and the inverting input terminal of the second operational amplifier U1B through the twelfth capacitor C12 and the sixteenth resistor R16. Both the sixteenth resistor R16 and the twelfth capacitor C12 are connected to the MCU main control unit.

[0040] The implementation process of voltage and current monitoring is that the voltage transmission value is divided by the eleventh resistor R11 and the twelfth resistor R12 and then connected to the non-inverting input terminal of the second operational amplifier U1B. This voltage is processed by voltage following of the second operational amplifier U1B and then filtered by the sixteenth resistor R16 and the twelfth capacitor C12 and connected to the ADC2 voltage sampling port of the MCU control unit for output voltage regulation processing. The second current sampling resistor RS2 samples the output current value, which is filtered by the ninth capacitor C9, the tenth capacitor C10, and the eleventh capacitor C11 through the thirteenth resistor R13 and the fourteenth resistor R14 and sent to the non-inverting and inverting input ports of the first operational amplifier U1A. The differential output of the first operational amplifier U1A is filtered by the fifteenth resistor R15 and the eighth capacitor C8 and sent to the ADC1 of the MCU main control unit to achieve current sampling and control functions. The MCU main control unit is mainly composed of an MCU that can implement sampling control. Multiple sub-control units can be connected in series simultaneously to achieve the synchronous implementation function of cooperating with one DC voltage output for multiple output controls. Finally, through multi-stage output control, the one-way DC multi-output control circuit of the present invention is realized.

[0041] In summary, a one-way DC multi-way output control circuit includes a DC / DC power unit, an MCU main control unit, and multiple sub-control units; each sub-control unit includes a main power conversion unit and a data sampling unit. The signal output end of the DC / DC power unit is connected to the signal input end of the main power conversion unit, the signal output end of the main power conversion unit is connected to the signal input end of the data sampling unit, and the signal output end of the data sampling unit is connected to the signal input end of the MCU main control unit. The number of the multiple sub-control units can be set according to actual needs. Through each sub-control unit, the practical application requirements of diversified one-way DC multi-way output control mode, independent control, and intelligent distribution are realized, with small volume, low cost, and easy control.

[0042] The above embodiments only represent the specific implementation methods of this application, and the description is relatively specific and detailed, but it should not be understood as a limitation of the protection scope of this application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the technical solution of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application.

Claims

1. A one-way DC multi-output control circuit, characterized in that, It includes a DC / DC power unit, an MCU main control unit, and multiple sub-control units; each sub-control unit includes a main power conversion unit and a data sampling unit; The signal output terminal of the DC / DC power unit is connected to the signal input terminal of the main power conversion unit, the signal output terminal of the main power conversion unit is connected to the signal input terminal of the data sampling unit, and the signal output terminal of the data sampling unit is connected to the signal input terminal of the MCU main control unit.

2. The one-way DC multi-way output control circuit according to claim 1, wherein The multiple sub-control units at least include a first sub-control unit and a second sub-control unit. The main power conversion unit of the first sub-control unit includes a first resistor (R1), a second resistor (R2), a fifth resistor (R5), a sixth resistor (R6), a first triode (Q1), a third triode (Q3), and a first zener diode (ZD1); The center point after the first resistor (R1) and the second resistor (R2) are connected in series is connected to the base of the third triode (Q3), the collector of the third triode (Q3) is connected to the gate of the first triode (Q1), and the center point after the fifth resistor (R5) and the sixth resistor (R6) are connected in series is connected to the gate of the first triode (Q1); The positive electrode of the first zener diode (ZD1) is respectively connected to the emitter of the third triode (Q3) and the source of the first triode (Q1), the negative electrode of the first zener diode is respectively connected to the collector of the third triode (Q3) and the gate of the first triode (Q1), and the first zener diode (ZD1) is connected in parallel with the sixth resistor (R6).

3. The one-way DC multi-way output control circuit according to claim 2, wherein The data sampling unit of the first sub-control unit includes a ninth resistor (R9), a tenth resistor (R10), and a first current sampling resistor (RS1). After the ninth resistor (R9) and the tenth resistor (R10) are connected in series, they are connected to the MCU main control unit through the first current sampling resistor (RS1).

4. The one-way DC multi-way output control circuit according to claim 3, characterized in that, The first sub-control unit further includes a third capacitor (C3) and a fourth capacitor (C4). The third capacitor (C3) and the fourth capacitor (C4) are connected in parallel. One end after parallel connection is connected to the fifth resistor (R5), and the other end is connected to the drain of the first triode (Q1).

5. The one-way DC multi-way output control circuit according to claim 2, wherein The main power conversion unit of the second sub-control unit includes a third resistor (R3), a fourth resistor (R4), a seventh resistor (R7), an eighth resistor (R8), a second triode (Q2), a fourth triode (Q4), and a second zener diode (ZD2); The center point after the third resistor (R3) and the fourth resistor (R4) are connected in series is connected to the base of the fourth triode (Q4), the collector of the fourth triode (Q4) is connected to the gate of the second triode (Q2), and the center point after the seventh resistor (R7) and the eighth resistor (R8) are connected in series is connected to the gate of the second triode (Q2); The positive electrode of the second voltage stabilizing diode (ZD2) is respectively connected to the emitter of the fourth triode (Q4) and the source electrode of the second triode (Q2). The negative electrode of the first voltage stabilizing diode is respectively connected to the collector of the fourth triode (Q4) and the gate of the second triode (Q2). The second voltage stabilizing diode (ZD2) is connected in parallel with the eighth resistor (R8).

6. The one-way DC multi-way output control circuit according to claim 5, wherein The data sampling unit of the second path control unit includes an eleventh resistor (R11), a twelfth resistor (R12), and a second current sampling resistor (RS2). The eleventh resistor (R11) and the twelfth resistor (R12) are connected in series and then connected to the MCU main control unit through the second current sampling resistor (RS2).

7. A one-way DC multi-output control circuit according to claim 6, characterized in that, The second path control unit further includes a fifth capacitor (C5) and a sixth capacitor (C6). The fifth capacitor (C5) and the sixth capacitor (C6) are connected in parallel. One end of the parallel connection is connected to the seventh resistor (R7), and the other end is connected to the drain of the second triode (Q2).

8. The one-way DC multi-way output control circuit according to claim 7, characterized in that, It further includes a first capacitor (C1) and a second capacitor (C2). The first capacitor (C1) and the second capacitor (C2) are connected in parallel. The DC / DC power unit is connected to the first path control unit and the second path control unit respectively through the parallel-connected first capacitor (C1) and second capacitor (C2).

9. A one-way DC multi-output control circuit according to claim 8, characterized in that, It further includes a monitoring unit. The monitoring unit includes a thirteenth resistor (R13), a fourteenth resistor (R14), a fifteenth resistor (R15), a sixteenth resistor (R16), a seventh capacitor (C7), an eighth capacitor (C8), a ninth capacitor (C9), a tenth capacitor (C10), an eleventh capacitor (C11), a twelfth capacitor (C12), a thirteenth capacitor (C13), a first operational amplifier (U1A), and a second operational amplifier (U1B). The thirteenth resistor (R13) and the fourteenth resistor (R14) are connected in parallel and are respectively connected to both ends of the ninth capacitor (C9). The thirteenth resistor (R13) is connected to the non-inverting input terminal of the first operational amplifier (U1A), and the fourteenth resistor (R14) is connected to the inverting input terminal of the first operational amplifier (U1A). The tenth capacitor (C10) and the eleventh capacitor (C11) are connected in parallel and then connected to the negative power supply terminal of the first operational amplifier (U1A). The seventh capacitor (C7) is connected to the positive power supply terminal of the first operational amplifier (U1A). The output terminal of the first operational amplifier (U1A) is connected to the seventh capacitor (C7) through the fifteenth resistor (R15) and the eighth capacitor (C8). One end of the thirteenth capacitor (C13) is respectively connected to the eleventh resistor (R11), the twelfth resistor (R12), and the non-inverting input terminal of the second operational amplifier (U1B). The other end is connected to the output terminal and the inverting input terminal of the second operational amplifier (U1B) through the twelfth capacitor (C12) and the sixteenth resistor (R16). Both the sixteenth resistor (R16) and the twelfth capacitor (C12) are connected to the MCU main control unit.

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