CN214674924U - Balanced stabilizing circuit of multichannel regulation and control - Google Patents
Balanced stabilizing circuit of multichannel regulation and control Download PDFInfo
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- CN214674924U CN214674924U CN202120287999.8U CN202120287999U CN214674924U CN 214674924 U CN214674924 U CN 214674924U CN 202120287999 U CN202120287999 U CN 202120287999U CN 214674924 U CN214674924 U CN 214674924U
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Abstract
The utility model discloses a multi-path regulation and control balance stabilizing circuit, which is applied to a multi-port power circuit, the boosting part of each path of buck-boost DC/DC circuit in the multi-port power circuit is straight, the automatic tracking output highest voltage circuit of the multi-port power circuit superposes and integrates the boost PWM signals of all buck-boost DC/DC circuits into a reference signal, the reference signal is superposed on the feedback reference value of an AC/DC circuit after processing, so that the AC/DC circuit automatically regulates the output voltage to the highest voltage in a multi-path output port, when the output voltage of more than two paths in the buck-boost DC/DC circuit is close to and higher than the output voltage of other paths of buck-boost DC/DC circuits, the boost PWM signals of each buck-boost DC/DC circuit are correspondingly superposed on the sampling feedback value of each path of buck-boost DC/DC circuit, avoiding the generation of oscillation.
Description
Technical Field
The utility model relates to a power technical field especially relates to a balanced stabilizing circuit of multichannel regulation and control.
Background
Referring to fig. 1, most of the multi-port power supplies in the market currently output power supplies after being processed by an AC/DC circuit, and then are provided with multiple DC/DC circuits to realize multi-port output. Generally, an output voltage is determined by an AC/DC circuit, and then each buck-boost DC/DC circuit performs buck or buck-boost output, so that multi-port output can be realized.
In order to solve the problem, an automatic tracking output highest voltage circuit is additionally arranged in a multi-port power circuit, the automatic tracking output highest voltage circuit superposes and integrates boost PWM signals of all buck-boost DC/DC circuits into a reference signal, and the reference signal is superposed on a feedback reference value of an AC/DC circuit after processing, so that any boost PWM signal is superposed on the feedback reference value of the AC/DC circuit when being changed, and the AC/DC circuit can automatically adjust output voltage to the highest voltage required in a multi-path output port. However, this causes a problem that oscillation occurs when more than two output voltages of the multi-path buck-boost DC/DC circuit are close to and higher than the output voltages of other buck-boost DC/DC circuits.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the oscillation defect that the above-mentioned solution when efficiency is poor of prior art brought, provide a balanced stabilizing circuit of multichannel regulation and control.
The utility model provides a technical scheme that its technical problem adopted is:
a multi-path regulation and control balanced and stable circuit is constructed and applied to a multi-port power circuit which comprises an AC/DC circuit, a multi-path buck-boost DC/DC circuit and an automatic tracking output highest voltage circuit, the AC/DC circuit is used for regulating the output voltage based on a set feedback reference value, the DC/DC circuit tracks and adjusts the output voltage of the AC/DC circuit to the highest voltage required to be output by the DC/DC circuit through a boosting PWM signal, the automatic tracking output highest voltage circuit is used for integrating the boosting PWM signals of all the boosting and reducing DC/DC circuits into a reference signal through superposition processing, the reference signal is processed and then superposed on a feedback reference value of the AC/DC circuit so that the AC/DC circuit regulates output voltage to the highest voltage required in the multi-path buck-boost DC/DC circuit;
the multi-path regulation balance stabilizing circuit comprises:
the balance stabilizing circuit is respectively connected with the plurality of paths of buck-boost DC/DC circuits and is used for acquiring the boost PWM signals of each path of buck-boost DC/DC circuit and correspondingly superposing the boost PWM signals of each path of buck-boost DC/DC circuit to the sampling feedback values of each path of buck-boost DC/DC circuit so as to lower the boost PWM signals of the buck-boost DC/DC circuit with high boost PWM signals and raise the boost PWM signals of the buck-boost DC/DC circuit with low boost PWM signals;
and the balance starting circuit is respectively connected with the balance stabilizing circuit and the multi-path buck-boost DC/DC circuit and is used for acquiring the output voltage of the multi-path buck-boost DC/DC circuit and starting the balance stabilizing circuit when the output voltage of more than two paths of buck-boost DC/DC circuits is close to and higher than the output voltage of other paths of buck-boost DC/DC circuits.
Preferably, the balanced starting circuit includes a first switch tube, a plurality of first resistors corresponding to the multi-path buck-boost DC/DC circuit, and a plurality of first diodes, a second resistor, a first capacitor, and a third resistor, where the third resistor is connected between the control end and the input end of the first switch tube, the output end of the first switch tube is connected to the balanced stabilizing circuit, the control end of the first switch tube is grounded via the first capacitor, the output ends of the respective buck-boost DC/DC circuits are respectively connected to the anodes of the corresponding first diodes, the cathodes of the respective first diodes are connected to the input end of the first switch tube in common, the output ends of the respective buck-boost DC/DC circuits are further connected to the first end of the second resistor via the corresponding first resistor, and the second end of the second resistor is connected to the control end of the first switch tube.
Preferably, the first switch tube is a PNP type triode.
Preferably, the balancing and stabilizing circuit includes a pull-up resistor, a pull-down resistor, and a plurality of superimposing circuits corresponding to the plurality of buck-boost DC/DC circuits, each superimposing circuit includes a second switch tube, a fourth resistor, a fifth resistor, and a second capacitor, each buck-boost DC/DC circuit includes a first sampling resistor and a second sampling resistor, the first sampling resistor and the second sampling resistor are connected in series between an output end of the corresponding buck-boost DC/DC circuit and an output end of the second switch tube, an output end of the second switch tube is grounded via the fourth resistor, the second capacitor is connected in parallel with the fourth resistor, an input end of the second switch tube obtains a boost PWM signal of the corresponding buck-boost DC/DC circuit via the corresponding fifth resistor, and control ends of all the second switch tubes are connected in common and then connected to an output end of the first switch in the balancing and starting circuit via the pull-up resistor, and after the control ends of all the second switching tubes are connected in common, the control ends are grounded through a pull-down resistor.
Preferably, the second switch tube is a PMOS tube.
The utility model discloses a balanced stabilizing circuit of multichannel regulation and control has following beneficial effect: the utility model discloses start balanced stabilizing circuit when having output voltage more than the two-way to be close and be higher than the output voltage of other way buck-boost DC/DC circuit in multichannel buck-boost DC/DC circuit, balanced stabilizing circuit will each way buck-boost DC/DC circuit boost PWM signal stacks on each way buck-boost DC/DC circuit's sampling feedback value to make the output voltage of the higher buck-boost DC/DC circuit of boost PWM signal turn down, the output voltage of the lower buck-boost DC/DC circuit of boost PWM signal turn up, just so can avoid the highest voltage circuit of automatic tracking output to produce when the output voltage of multichannel buck-boost DC/DC circuit is close and vibrate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a schematic diagram of a prior art multi-port power supply circuit;
FIG. 2 is a schematic diagram of an improved multi-port power supply circuit;
FIG. 3 is a modified schematic diagram of a buck-boost DC/DC circuit;
FIG. 4 is a circuit diagram of an auto-tracking output maximum voltage circuit;
fig. 5 is a circuit diagram of a multi-way regulation balancing stabilizing circuit in an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Exemplary embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be named as a second component, and similarly, a second component may also be named as a first component, without departing from the scope of the present invention. "connected" or "connected" encompasses not only the direct connection of two entities, but also the indirect connection via other entities that have beneficial, modifying, effects.
The utility model discloses general thinking is: referring to fig. 2, the multi-port power circuit includes an AC/DC circuit and a plurality of buck-boost DC/DC circuits respectively connected to the AC/DC circuit, such as N buck-boost DC/DC circuits illustrated in the figure, where N is a positive integer greater than 1. The input end of the AC/DC circuit is connected with an alternating current source, the output end of the AC/DC circuit is simultaneously connected with the input ends of the N buck-boost DC/DC circuits, and the output ends of the N buck-boost DC/DC circuits are connected with the output ports 1 to the output port N in a one-to-one correspondence mode, so that multi-path power output is achieved. The AC/DC circuit is used for converting an alternating current source into a direct current source to be output, the AC/DC circuit adjusts output voltage based on a set feedback reference value, and on the premise that output sampling resistance is not changed, the larger the feedback reference value is, the larger the output voltage is, otherwise, the smaller the feedback reference value is, the smaller the output voltage is. Each of the buck-boost DC/DC circuits tracks and adjusts the output voltage of the AC/DC circuit to the highest voltage required to be output by itself by using the boost PWM signal, for example, the buck-boost DC/DC circuit samples the output voltage of itself to generate a corresponding sampling feedback value, and then adjusts the duty ratio of the boost PWM signal according to the magnitude of the sampling feedback value, so that the output of the buck-boost DC/DC circuit reaches the required output voltage. It is understood that the output of each buck-boost DC/DC circuit may be the same or different. When the input voltage of the buck-boost DC/DC circuit is larger than or equal to the output voltage, the buck-boost DC/DC circuit controls the output voltage by adjusting the buck PWM, when the input voltage is smaller than the output voltage, the DC/DC circuit controls the output voltage by adjusting the boost PWM, and the magnitude of the boost PWM signal is positively correlated with the output voltage of the buck-boost DC/DC circuit. Based on this, the present invention, on one hand, leads the boost portion of each buck-boost DC/DC circuit directly, referring to fig. 3, the left diagram is the conventional buck-boost DC/DC circuit, and the right diagram is the buck-boost DC/DC circuit after the boost portion is directly led, for example, the input and output of Q2 are connected by a wire; on the other hand, the output of the AC/DC circuit is feedback-controlled by using the boosted PWM signals of the boost-buck DC/DC circuits, specifically, the boosted PWM signals of the AC/DC circuits are superposed and processed to be superposed with the feedback reference value of the AC/DC circuit.
For this purpose, an automatic tracking output maximum voltage circuit 100 may be designed, where the automatic tracking output maximum voltage circuit 100 is configured to integrate the boost PWM signals of all the buck-boost DC/DC circuits into one reference signal through superposition processing, and superimpose the reference signal onto the feedback reference value of the AC/DC circuit after processing, so that the AC/DC circuit adjusts the output voltage to the voltage with the highest requirement in the multiple buck-boost DC/DC circuits. Specifically, referring to fig. 4, the circuit 100 includes: a boost PWM signal superimposing circuit 101 and a reference signal processing circuit 102; the boost PWM signal superposition circuit 101 is respectively connected with the multi-path boost-buck DC/DC circuit, and is used for respectively obtaining the boost PWM signals of the multi-path boost-buck DC/DC circuit, and superposing and integrating all the boost PWM signals into a reference signal; the reference signal processing circuit 102 is connected to the boost PWM signal superimposing circuit 101 and the AC/DC circuit, and is configured to superimpose the processed reference signal on a feedback reference value of the AC/DC circuit. Therefore, the feedback reference value of the AC/DC circuit can be superposed by changing any boosting PWM signal, so that the AC/DC circuit can automatically adjust the highest voltage required by the output voltage to multiple output ports, and the power supply efficiency is improved.
However, the tracking method of the auto-tracking output maximum voltage circuit 100 has a drawback that if the output of each buck-boost DC/DC circuit is close to two or more outputs, an oscillation occurs. For example, assuming that there are two buck-boost DC/DC circuits, the output voltages Vout1 and Vout2 of the two buck-boost DC/DC circuits are close to each other, and assuming that Vout1 is slightly higher than Vout2, PWM1 in the boost PWM signals of the two buck-boost DC/DC circuits is higher than PWM2, for Vout1, the output voltage of the AC/DC circuit is sufficient for the first buck-boost DC/DC circuit, but is insufficient for the second buck-boost DC/DC circuit, so the second buck-boost DC/DC circuit will increase the output by controlling PWM2 to increase, and once PWM2 increases, the output voltage of the AC/DC circuit will increase, and further cause PWM1 to decrease, so that repeated oscillation will occur repeatedly. In order to solve the problem, the utility model designs a balanced stabilizing circuit 200 of multichannel regulation and control, refer to fig. 5, balanced stabilizing circuit 200 of multichannel regulation and control includes:
and the balance stabilizing circuit 202 is connected with the multiple buck-boost DC/DC circuits respectively, and is configured to acquire the boost PWM signal of each buck-boost DC/DC circuit, and superimpose the boost PWM signal of each buck-boost DC/DC circuit onto a sampling feedback value of each buck-boost DC/DC circuit, so that the boost PWM signal of the buck-boost DC/DC circuit with a high boost PWM signal is adjusted to be low, and the boost PWM signal of the buck-boost DC/DC circuit with a low boost PWM signal is adjusted to be high. The higher the boost PWM of the buck-boost DC/DC circuit is, the larger the superposition amount superposed on the sampling feedback value is, so that the boost PWM signal is adjusted to be low, and the lower the boost PWM signal is, the lower the output voltage of the buck-boost DC/DC circuit is adjusted to be low; conversely, the lower the boost PWM of the buck-boost DC/DC circuit is, the smaller the amount of superposition on the sampling feedback value is, so the boost PWM signal is increased, and the lower the boost PWM signal is, the higher the output voltage of the buck-boost DC/DC circuit is. So can finally realize stable to the equilibrium, can not appear shaking.
And the balance starting circuit 201 is connected with the balance stabilizing circuit 202 and the multi-path buck-boost DC/DC circuit respectively, and is used for acquiring the output voltage of the multi-path buck-boost DC/DC circuit and starting the balance stabilizing circuit 202 when the output voltage of more than two paths of buck-boost DC/DC circuits is close to and higher than the output voltage of other paths of buck-boost DC/DC circuits.
It should be noted that, the utility model discloses a mention more than two (suppose that N way) step-up and step-down DC/DC circuit's output is close, here be close can be among N way output of N way step-up and step-down DC/DC circuit, absolute error between two liang of outputs is in predetermineeing amplitude error range (for example-X ~ X volt scope, X is the positive number), ratio and the difference of 1 between two liang of outputs that can also indicate are in predetermineeing proportion error range (for example-Y ~ Y's scope, Y is the number that is less than 1).
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the specific features in the embodiments and examples of the present invention are detailed descriptions of the technical solutions of the present application, but not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present invention can be combined with each other without conflict.
The present invention will be described in detail with reference to fig. 4 by taking two buck-boost DC/DC circuits as an example. Assume that the two-way buck-boost DC/DC circuit is DC/DC1 and DC/DC2, DC/DC1 PWM represents the boost PWM signal of DC/DC1, and DC/DC2 PWM represents the boost PWM signal of DC/DC 2.
The boost PWM signal superimposing circuit 101 includes a capacitor C21, a resistor R47, and two resistors R44 and R45 corresponding to the two buck-boost DC/DC circuits, respectively, the capacitor C21 is connected in parallel with the resistor R47, a first end of the resistor R47 is grounded, first ends of the two resistors R44 and R45 are connected to a second end of the resistor R47, and second ends of the two resistors R44 and R45 are connected to the two buck-boost DC/DC circuits in a one-to-one correspondence to obtain boost PWM signals of the two buck-boost DC/DC circuits, respectively: DC/DC1 PWM and DC/DC2 PWM, and the second terminal of the resistor R47 is also connected to the reference signal processing circuit 102 to transmit the integrated reference signal to the reference signal processing circuit 102.
Wherein the reference signal processing circuit 102 comprises a feedback amplification circuit. In this embodiment, the AC/DC circuit includes a controllable precision voltage regulator U3 and a sampling circuit for sampling an output voltage of the AC/DC circuit, and a reference electrode of the controllable precision voltage regulator is connected to the sampling circuit. For example, U3 specifically employs TL432, and may also be TL 431. The sampling circuit is specifically a voltage dividing circuit, and for example, in the present embodiment, the sampling circuit is composed of resistors R35, R39, and R40. The reference pole of U3 is connected between resistors R35 and R39. The anode of the controllable precision voltage regulator U3 is grounded via a resistor R33. The input end of the feedback amplifying circuit is connected with the second end of the resistor R47 to receive the reference signal, the output end of the feedback amplifying circuit is connected to the anode of the controllable precise voltage-stabilizing source U3, and the feedback end of the feedback amplifying circuit is connected between the R39 and the R40 of the sampling circuit.
Specifically, the feedback amplifying circuit comprises an operational amplifier U4, resistors R43, R42, a capacitor C20 and a resistor R41, wherein the non-inverting input end of the operational amplifier U4 is connected with the second end of the resistor R47 through R43 to receive the reference signal, the inverting input end of the operational amplifier U4 is connected with the output end of the operational amplifier U4 through a resistor R42, the capacitor C20 is connected with the resistor R42 in parallel, and the output end of the operational amplifier U4 is connected with the anode of the controllable precision voltage stabilizing source U3. The inverting input end of the operational amplifier U4 is used as the feedback end of the feedback amplifying circuit and is connected between R39 and R40 through R41, the output signal of the operational amplifier U4 is superposed on R39 and R40 through the anode and the reference pole of the controllable precise voltage-stabilizing source U3, and then is fed back to the inverting input end of the operational amplifier U4 through R41 and R42.
In order to solve the oscillation problem, referring to fig. 5, DC/DC1 PWM and DC/DC2 PWM indicate boost PWM signals of the two buck-boost DC/DC circuits, and VOUT1 and VOUT2 respectively indicate output voltages of the two buck-boost DC/DC circuits.
In this embodiment, the balanced start circuit 201 includes a first switch tube, two first resistors R104 and R46 corresponding to the two buck-boost DC/DC circuits, two first diodes D9 and D10, a second resistor R105, a first capacitor C1, and a third resistor R34, where the first switch tube is specifically a PNP type triode Q37. The balanced and stable circuit 202 comprises a pull-up resistor R131, a pull-down resistor R164, and two superposition circuits corresponding to the multi-path buck-boost DC/DC circuit, each superposition circuit comprises a second switch tube, fourth resistors R165 and R166, fifth resistors R174 and R173, and second capacitors C4 and C6, each buck-boost DC/DC circuit comprises a first sampling resistor R125/R102 and a second sampling resistor R126/R103, and the second switch tubes are specifically PMOS tubes Q38 and Q39.
The third resistor R34 is connected between the base of the Q37 and the base of the Q37 between the emitters and the base of the Q37 and is grounded through a first capacitor C1, the output ends of the two paths of buck-boost DC/DC circuits are respectively connected to the anodes of corresponding first diodes D9/D10, the cathodes of the first diodes D9 and D10 are connected to the emitter of the Q37 in a common mode, the output ends of the buck-boost DC/DC circuits are further connected to the first end of the second resistor R105 through corresponding first resistors R104/R46, and the second end of the second resistor R105 is connected to the base of the Q37.
The first sampling resistor R125/R102 and the second sampling resistor R126/R103 are connected in series between the output end of the corresponding buck-boost DC/DC circuit and the drains of the Q38 and the Q39, a voltage signal at a node between the first sampling resistor R125/R102 and the second sampling resistor R126/R103 is a sampling feedback value of the corresponding buck-boost DC/DC circuit, and the buck-boost DC/DC circuit adjusts the duty ratio of the boost PWM signal according to the sampling feedback value to achieve the purpose of controlling the output voltage of the buck-boost DC/DC circuit to be the required voltage. Drains of the Q38 and the Q39 are grounded through fourth resistors R165 and 166, second capacitors C4 and C6 are respectively connected in parallel with the corresponding fourth resistors R165 and 166, sources of the Q38 and the Q39 acquire boost PWM signals of the corresponding boost-buck DC/DC circuit through corresponding fifth resistors R174 and R173, gates of the Q38 and the Q39 are connected in common and then connected to a collector of the Q37 through a pull-up resistor R131, and gates of the Q38 and the Q39 are connected in common and then grounded through a pull-down resistor R164.
The control principle of the two-way buck-boost DC/DC circuit is described below with reference to fig. 4 and 5:
the DC/DC1 PWM and the DC/DC2 PWM integrate two paths of PWM signals into a reference signal through R44, R45, R47 and C21, and the reference signal can be adjusted up no matter which path of PWM signal is adjusted up. The reference signal is amplified to R33 under U3 according to a certain multiple through the operational amplifier U4, so that the feedback reference value of the AC/DC circuit is changed, and the AC/DC output voltage regulation is further realized. When the DC/DC1 required voltage is insufficient, the DC/DC1 PWM is adjusted upwards, so that the reference signal is also adjusted upwards, and the AC/DC voltage is adjusted upwards, so that the AC/DC automatically adjusted voltage is the highest voltage required by an output port; conversely, when the input voltage of the DC/DC1 exceeds, the DC/DC1 PWM will be adjusted downward, so that the reference signal is adjusted downward, and the AC/DC voltage is adjusted downward. DC/DC2 is also the same control principle.
The voltage of the emitter of Q37 is the maximum voltage screened by VOUT1 and VOUT2, and the voltage of the base of Q37 is obtained by VOUT1 passing through R104, VOUT2 passing through R46, when the difference between VOUT1 and VOUT2 is large, R104 and R46 are equal to partial voltage, so the voltage of the base and the emitter of Q37 generates a voltage difference for turning on Q37, that is, Q37 is turned on, therefore, the gate voltages of Q38 and Q39 are pulled high and cannot be turned on, that is, the balancing and stabilizing circuit 202 is not started; when VOUT1 is close to VOUT2, the base and emitter voltages of Q37 approach, so Q37 is turned off, and the gate voltages of Q38 and Q39 are pulled down to ground to turn on, i.e., the balun 202 is turned on. After the balanced and stable circuit 202 is started, the DC/DC1 PWM adds a feedback signal to the sampling feedback value of the DC/DC1 through R174, R165 and C4, and the DC/DC2 PWM adds a feedback signal to the sampling feedback value of the DC/DC2 through R173, R166 and C6. Because the boost PWM signal of the path of the boost-buck DC/DC circuit with high output voltage is high, the feedback quantity superposed on the sampling feedback value is high, and the boost PWM signal of the boost-buck DC/DC circuit is adjusted downwards; the PWM signal of the path of the buck-boost DC/DC circuit with low output voltage is low, so that the feedback quantity superposed on the sampling feedback value is low, the boost PWM signal of the buck-boost DC/DC circuit is upward adjusted, and finally, the AC/DC circuit can be ensured to reach a balanced and stable output voltage.
It is assumed that M steps of the buck-boost DC/DC circuit are provided in total, and the balance stabilization circuit 202 is activated when the output voltage of the N steps of the buck-boost DC/DC circuit is close to and higher than the output voltage of the other steps of the buck-boost DC/DC circuit, where M is a positive integer equal to or greater than 2, and N is a positive integer equal to or less than M and equal to or greater than 2. If N is equal to M, an extension to the circuit of fig. 5 is preferably applied. If N is smaller than M, preferably, M pins of the single chip microcomputer are used to monitor the output voltages of the M buck-boost DC/DC circuits, and then, if N buck-boost DC/DC circuits exist, the output voltages of the N buck-boost DC/DC circuits are close to and higher than the output voltages of the other buck-boost DC/DC circuits, if N buck-boost DC/DC circuits exist, the single chip microcomputer is used to start the balancing and stabilizing circuit 202, for example, the switching tubes of the M superimposing circuits are controlled to be turned on. For example, if there are three buck-boost DC/DC circuits, the balancing and stabilizing circuit 202 is not started if the output voltages are 5, and 9V, respectively, and the balancing and stabilizing circuit 202 is started if the output voltages are 5, 9, and 9V, respectively.
To sum up, the utility model discloses a balanced stabilizing circuit of multichannel regulation and control has following beneficial effect: the utility model discloses start balanced stabilizing circuit when having output voltage more than the two-way to be close and be higher than the output voltage of other way buck-boost DC/DC circuit in multichannel buck-boost DC/DC circuit, balanced stabilizing circuit will each way buck-boost DC/DC circuit boost PWM signal stacks on each way buck-boost DC/DC circuit's sampling feedback value to make the boost PWM signal of the buck-boost DC/DC circuit that the boost PWM signal is high turn down, boost PWM signal is low the boost PWM signal of buck-boost DC/DC circuit turn up, just so can avoid automatic tracking output maximum voltage circuit to produce when the output voltage of multichannel buck-boost DC/DC circuit is close and vibrate.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (5)
1. A multi-path regulation and control balance stabilizing circuit is applied to a multi-port power supply circuit and is characterized in that, the multi-port power supply circuit comprises an AC/DC circuit, a multi-path buck-boost DC/DC circuit and an automatic tracking output highest voltage circuit, the AC/DC circuit is used for regulating the output voltage based on a set feedback reference value, the DC/DC circuit tracks and adjusts the output voltage of the AC/DC circuit to the highest voltage required to be output by the DC/DC circuit through a boosting PWM signal, the automatic tracking output highest voltage circuit is used for integrating the boosting PWM signals of all the boosting and reducing DC/DC circuits into a reference signal through superposition processing, the reference signal is processed and then superposed on a feedback reference value of the AC/DC circuit so that the AC/DC circuit regulates output voltage to the highest voltage required in the multi-path buck-boost DC/DC circuit;
the multi-path regulation balance stabilizing circuit comprises:
the balance stabilizing circuit is respectively connected with the plurality of paths of buck-boost DC/DC circuits and is used for acquiring the boost PWM signals of each path of buck-boost DC/DC circuit and correspondingly superposing the boost PWM signals of each path of buck-boost DC/DC circuit to the sampling feedback values of each path of buck-boost DC/DC circuit so as to lower the boost PWM signals of the buck-boost DC/DC circuit with high boost PWM signals and raise the boost PWM signals of the buck-boost DC/DC circuit with low boost PWM signals;
and the balance starting circuit is respectively connected with the balance stabilizing circuit and the multi-path buck-boost DC/DC circuit and is used for acquiring the output voltage of the multi-path buck-boost DC/DC circuit and starting the balance stabilizing circuit when the output voltage of more than two paths of buck-boost DC/DC circuits is close to and higher than the output voltage of other paths of buck-boost DC/DC circuits.
2. The multi-channel regulation and control balanced and stabilized circuit of claim 1, wherein the balanced start-up circuit comprises a first switch tube, a plurality of first resistors and a plurality of first diodes, a second resistor, a first capacitor, and a third resistor corresponding to the multi-channel buck-boost DC/DC circuit, the third resistor is connected between the control end and the input end of the first switch tube, the output end of the first switch tube is connected with the balance stabilizing circuit, the control end of the first switch tube is grounded through the first capacitor, the output ends of the buck-boost DC/DC circuits are respectively connected to the anodes of the corresponding first diodes, the cathodes of the first diodes are connected to the input end of the first switch tube in a common mode, the output ends of the buck-boost DC/DC circuits are further connected to the first end of the second resistor through the corresponding first resistor, and the second end of the second resistor is connected with the control end of the first switch tube.
3. The multi-channel regulation and control balancing and stabilizing circuit of claim 2, wherein the first switching tube is a PNP type triode.
4. The multi-channel regulation and control balanced and stable circuit as claimed in claim 1, wherein the balanced and stable circuit comprises a pull-up resistor, a pull-down resistor, and a plurality of superimposed circuits corresponding to the multi-channel buck-boost DC/DC circuits, each superimposed circuit comprises a second switch tube, a fourth resistor, a fifth resistor, and a second capacitor, each buck-boost DC/DC circuit comprises a first sampling resistor and a second sampling resistor, the first sampling resistor and the second sampling resistor are connected in series between an output terminal of the corresponding buck-boost DC/DC circuit and an output terminal of the second switch tube, an output terminal of the second switch tube is grounded via the fourth resistor, the second capacitor is connected in parallel with the fourth resistor, an input terminal of the second switch tube obtains a boost PWM signal of the corresponding buck-boost DC/DC circuit via the corresponding fifth resistor, and control terminals of all the second switch tubes are connected in common and then connected to an output terminal of the first switch in the balanced start-up circuit via the pull-up resistor And the output end is grounded through a pull-down resistor after the control ends of all the second switching tubes are connected in common.
5. The multi-channel regulation balance stabilization circuit of claim 4, wherein the second switch tube is a PMOS tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120287999.8U CN214674924U (en) | 2021-02-01 | 2021-02-01 | Balanced stabilizing circuit of multichannel regulation and control |
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| CN202120287999.8U CN214674924U (en) | 2021-02-01 | 2021-02-01 | Balanced stabilizing circuit of multichannel regulation and control |
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| CN202120287999.8U Active CN214674924U (en) | 2021-02-01 | 2021-02-01 | Balanced stabilizing circuit of multichannel regulation and control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037103A (en) * | 2021-02-01 | 2021-06-25 | 惠州市新斯贝克动力科技有限公司 | Multi-port power supply circuit and auxiliary circuit thereof |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113037103A (en) * | 2021-02-01 | 2021-06-25 | 惠州市新斯贝克动力科技有限公司 | Multi-port power supply circuit and auxiliary circuit thereof |
| CN113037103B (en) * | 2021-02-01 | 2024-09-03 | 惠州市新斯贝克动力科技有限公司 | Multi-port power supply circuit and auxiliary circuit thereof |
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