CN115864802A - Current-sharing circuit, power module and system - Google Patents
Current-sharing circuit, power module and system Download PDFInfo
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- CN115864802A CN115864802A CN202211481888.6A CN202211481888A CN115864802A CN 115864802 A CN115864802 A CN 115864802A CN 202211481888 A CN202211481888 A CN 202211481888A CN 115864802 A CN115864802 A CN 115864802A
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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
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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
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Abstract
The invention relates to a current-sharing circuit, a power supply module and a system. The circuit only needs one 8-pin dual-operational amplifier IC and is matched with a simple periphery to complete current sharing control, and the circuit scheme does not influence voltage precision in the current sharing process, and can meet the advantages of high current sharing precision, high voltage precision, rapid dynamic response, good loop stability and the like.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a current-sharing circuit, a power supply module and a system.
Background
In the application of the power module, a redundant design is often required, or a plurality of modules are required to work in parallel under the condition that a single module cannot meet the output power. However, in the process of parallel operation, because the reference voltage, the resistance precision and the like of each power supply are different, the current difference between each power supply module is larger, and some power supply modules run at full load and some power supply modules are in an almost idle state; moreover, most of the current analog current sharing schemes on the market have the condition of voltage up-regulation after parallel connection, the field combination with higher voltage requirement precision is not ideal, and the circuit is complex and is not easy to miniaturize.
Disclosure of Invention
The present invention is directed to overcome at least one of the above-mentioned drawbacks of the prior art, and provides a current-sharing circuit, a power module, and a system, in which the current-sharing circuit makes the currents among the power main modules more balanced, and the output voltage precision is higher.
The technical scheme adopted by the invention is as follows:
in a first aspect, a current-sharing circuit is provided, which is applied to a power supply system, the system includes a plurality of power supply modules connected in parallel, each power supply module includes a power main module, a voltage feedback loop, a sampling resistor and the current-sharing circuit, and the current-sharing circuit includes an amplifying circuit, an error amplifier and a current converting circuit; the amplifying circuit comprises a unidirectional amplifying unit and a voltage dividing unit;
the first input end of the unidirectional amplification unit is used for being connected with one end of the sampling resistor, the second input end of the unidirectional amplification unit is connected with the second end of the voltage division unit and the first input end of the error amplifier, and the output end of the unidirectional amplification unit is connected with the first end of the voltage division unit and is used as a shared end of the current sharing circuit;
the second input end of the error amplifier is used for being connected with one end of the sampling resistor, and the output end of the error amplifier is connected with the input end of the current conversion circuit;
the output end of the current conversion circuit is connected with the voltage feedback loop;
the amplifying circuit is used for acquiring an output signal of the power main module, performing unidirectional amplification on the output signal to generate a voltage signal, and dividing the voltage signal to generate a voltage dividing signal;
the error amplifier is used for comparing the voltage division signal with the output signal;
the current conversion circuit is used for adjusting the voltage feedback loop when the error amplifier judges that the divided voltage signal is greater than the output signal, so that the output current of the power main module is increased, and the divided voltage signal is equal to the output signal;
and the plurality of power supply modules are connected in parallel through the sharing end.
Preferably, the unidirectional amplification unit includes an operational amplifier U1B and a diode D1, a positive-phase end of the operational amplifier U1B is used as a first input end of the unidirectional amplification unit, a negative-phase end of the operational amplifier U1B is used as a second input end of the unidirectional amplification unit, an output end of the operational amplifier U1B is connected with an anode of the diode D1, and a cathode of the diode D1 is used as a shared end.
Preferably, the voltage dividing unit includes a resistor R1 and a resistor R2 connected in series; one end of the resistor R2 serves as a first end of the voltage division unit, the other end of the resistor R2 is connected with one end of the resistor R1 and then serves as a second end of the voltage division unit, and the other end of the resistor R1 is grounded.
Preferably, the error amplifier comprises a resistor R3, an operational amplifier U1A, and a gain and loop adjusting unit; one end of the resistor R3 is used as a second input end of the error amplifier, and the other end of the resistor R3 is connected with the first end of the gain and loop regulating unit and the negative phase end of the operational amplifier U1A; and the positive end of the operational amplifier U1A is used as the first input end of the error amplifier, and the output end of the operational amplifier U1A is connected with the second end of the gain and loop adjusting unit and then is used as the output end of the error amplifier.
Preferably, the gain and loop adjusting unit includes a resistor R4, a resistor R5, and a capacitor C1, one end of the resistor R4 is used as a first end of the gain and loop adjusting unit, the other end of the resistor R4 is connected to one end of the resistor R5 and one end of the capacitor C1, and the other end of the resistor R5 is connected to the other end of the capacitor C1 and then is used as a second end of the gain and loop adjusting unit.
Preferably, the current conversion circuit comprises a voltage regulator tube D4, a voltage regulator tube D5, a resistor R7, a resistor R9 and a triode Q1; the cathode of the voltage-stabilizing tube D5 is used as the input end of the current conversion circuit, and the anode of the voltage-stabilizing tube D5 is connected with one end of the resistor R7; the other end of the resistor R7 is connected with the cathode of the voltage-regulator tube D4 and the base of the triode Q1; an emitting electrode of the triode Q1 is connected with one end of the resistor R9, and a collecting electrode of the triode Q1 is used as an output end of the current conversion circuit; the other end of the resistor R9 and the anode of the voltage regulator tube D4 are grounded.
In a second aspect, a current-sharing circuit is provided, which is applied to a power supply system, the system includes a plurality of power supply modules connected in parallel, each power supply module includes a power main module, a voltage feedback loop, a sampling resistor and the current-sharing circuit, and the current-sharing circuit includes an amplifying circuit, an error amplifier and a current converting circuit;
the amplifying circuit comprises an operational amplifier U1B, a diode D1, a resistor R1 and a resistor R2;
the error amplifier comprises a resistor R3, an operational amplifier U1A, a resistor R4, a resistor R5 and a capacitor C1;
the current conversion circuit comprises a voltage regulator tube D4, a voltage regulator tube D5, a resistor R7, a resistor R9 and a triode Q1;
the positive phase end of the operational amplifier U1B is connected with one end of the resistor R3 and then is used for being connected with one end of the sampling resistor, and the output end of the operational amplifier U1B is connected with the anode of the diode D1; one end of the resistor R1 is connected with the ground, and the other end of the resistor R1 is connected with the negative phase end of the operational amplifier U1B, the positive phase end of the operational amplifier U1A and one end of the resistor R2; the other end of the resistor R2 and the cathode of the diode D1 are used as a shared end; the other end of the resistor R3 is connected with one end of the resistor R4 and the negative phase end of the operational amplifier U1A; the other end of the resistor R4 is connected with one end of the resistor R5 and one end of the capacitor C1; the other end of the resistor R5 is connected with the other end of the capacitor C1, the cathode of the voltage regulator tube D5 and the output end of the operational amplifier U1A; the anode of the voltage-stabilizing tube D5 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with the cathode of the voltage-stabilizing tube D4 and the base of the triode Q1, the emitter of the triode Q1 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the ground, and the collector of the triode Q1 is used as the output end of the current-equalizing circuit and is connected with the voltage feedback loop;
and the plurality of power supply modules are connected in parallel through the sharing end.
In a third aspect, a power module is provided, which includes a power main module, a voltage feedback loop, a sampling resistor, and the current sharing circuit as described above; the positive output end of the power main module is connected with the first end of the voltage feedback loop and then is used for being connected with one end of a load, the VFB end of the power main module is connected with the third end of the voltage feedback loop, the GND end of the power main module is connected with the fourth end of the voltage feedback loop and one end of the sampling resistor and then is grounded, and the other end of the sampling resistor is used for being connected with the other end of the load; and the second end of the voltage feedback loop is connected with the output end of the current conversion circuit.
Preferably, the voltage feedback loop comprises a resistor Rc1, a resistor Rb1, a resistor Ra1; one end of the resistor Rc1 serves as a first end of the voltage feedback loop, and the other end of the resistor Rc1 is connected with one end of the resistor Rb1 and serves as a second end of the voltage feedback loop; the other end of the resistor Rb1 is connected with one end of the resistor Ra1 and is used as a third end of the voltage feedback loop; the other end of the resistor Ra1 serves as the fourth terminal of the voltage feedback loop.
In a fourth aspect, a power supply system is provided, which includes a plurality of power supply modules as described above, and the plurality of power supply modules are connected in parallel through a shared terminal.
Compared with the prior scheme, the invention has the following remarkable effects:
the current-sharing circuit of the invention sets a silent interval through a voltage-stabilizing diode D5, and the control loops of R5, C1, R4 and the like enable the output voltage precision after current sharing between modules in parallel to be high; the current equalizing process is realized by adopting single double operational amplifiers, the current equalizing precision is high, the peripheral circuit is simple, the control is simple, the loop is stable, and the practical value is high.
Drawings
FIG. 1 is a schematic diagram of a current share circuit according to an embodiment;
FIG. 2 is a schematic diagram of a power module according to an embodiment;
fig. 3 is a schematic diagram of a power supply system according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a specific schematic diagram of a current sharing circuit according to this embodiment, fig. 2 is a block diagram of a power module according to this embodiment, fig. 3 is a schematic diagram of a power system according to this embodiment, in this embodiment, a current sharing circuit is provided and applied to a power system, the system includes a plurality of power modules connected in parallel, each power module includes a power main module, a voltage feedback loop, a sampling resistor and the current sharing circuit, and the current sharing circuit includes an amplifying circuit 100, an error amplifier 200, and a current converting circuit 300; the amplifying circuit 100 comprises a unidirectional amplifying unit and a voltage dividing unit;
the first input end of the unidirectional amplification unit is used for being connected with one end of the sampling resistor, the second input end of the unidirectional amplification unit is connected with the second end of the voltage division unit and the first input end of the error amplifier 200, and the output end of the unidirectional amplification unit is connected with the first end of the voltage division unit and serves as a shared end of the current sharing circuit;
a second input end of the error amplifier 200 is used for being connected with one end of the sampling resistor, and an output end of the error amplifier is connected with an input end of the current conversion circuit 300;
the output end of the current conversion circuit 300 is used for being connected with the voltage feedback loop;
the amplifying circuit 100 is configured to collect an output signal of the power main module, perform unidirectional amplification on the output signal to generate a voltage signal, and perform voltage division on the voltage signal to generate a voltage division signal;
the error amplifier 200 is used for comparing the divided voltage signal with the output signal;
the current converting circuit 300 is configured to adjust the voltage feedback loop to increase the output current of the power master module when the error amplifier 200 determines that the divided voltage signal is greater than the output signal, so that the divided voltage signal is equal to the output signal;
and the plurality of power supply modules are connected in parallel through the sharing end.
Specifically, the power module includes a power main module, a voltage feedback loop, a sampling resistor Rcs1, and a current-sharing circuit, where the current-sharing circuit includes an amplifying circuit 100, an error amplifier 200, and a current converting circuit 300, and the voltage feedback loop includes a resistor Rc1, a resistor Rb1, and a resistor Ra1.
The terminal Vin + of the power main module is connected with the positive terminal of an input voltage, the terminal Vin-is connected with the negative terminal of the input voltage, the terminal Vout + is connected with one end of a resistor Rc1, the other end of the resistor Rc1 is connected with one end of a resistor Rb1, the other end of the resistor Rb1 is connected with the VFB terminal of the power main module and one end of a resistor Ra1, the other end of the resistor Ra1 is connected with a GND terminal and one end of a sampling resistor Rcs1 as the negative terminal (CS-terminal) of a current signal, the other end of the resistor Rcs1 is connected with one end of a load RL as the positive terminal (CS + terminal) of the current signal, and the other end of the load RL is connected with the terminal Vout +.
In particular, the method comprises the following steps of,
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as a specific embodiment of the amplifying circuit 100, the amplifying circuit 100 includes an operational amplifier U1B, a diode D1, a resistor R1, and a resistor R2;
as a specific embodiment of the error amplifier 200, the error amplifier 200 includes a resistor R3, an operational amplifier U1A, a resistor R4, a resistor R5, and a capacitor C1;
as a specific embodiment of the current converting circuit 300, the current converting circuit 300 includes a voltage regulator tube D4, a voltage regulator tube D5, a resistor R7, a resistor R9, and a transistor Q1;
as shown in fig. 1, the specific connection manner of the current equalizing circuit in this embodiment is as follows: the current signal negative end (CS-end) is connected with GND, the current signal positive end is connected with the other end (CS + end) of the resistor Rcs1, the positive phase end (5 end) of the operational amplifier U1B and the one end of the resistor R3, one end of the resistor R1 is connected with GND, the other end of the resistor R1 is connected with the negative phase end (6 end) of the operational amplifier U1B, the positive phase end (3 end) of the operational amplifier U1A and the one end of the resistor R2, the other end of the resistor R2 is connected with the cathode of the diode D1 and the share end, the anode of the diode D1 is connected with the output end (7 end) of the operational amplifier U1B, the 8 end of the operational amplifier U1B is connected with VCC, and the 4 end of the operational amplifier U1B is connected with GND; the other end of the resistor R3 is connected with one end of a resistor R4 and is simultaneously connected with a negative phase end (2 end) of the operational amplifier U1A, the other end of the resistor R4 is connected with one end of a resistor R5 and is simultaneously connected with one end of a capacitor C1, the other end of the resistor R5 is connected with the other end of the capacitor C1 and is simultaneously connected with a cathode of a voltage stabilizing tube D5 and an output end (1 end) of the operational amplifier U1A, and a positive phase end (3 end) of the operational amplifier U1A is connected with a negative phase end (6 end) of the operational amplifier U1B; the positive pole of a voltage-regulator tube D5 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the negative pole of a voltage-regulator tube D4 and is simultaneously connected with the B pole of a triode Q1, the E pole of the triode Q1 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with GND, the positive pole of the voltage-regulator tube D4 is connected with GND, the C pole of the triode Q1 is connected with a VCF end as a control end, and the VCF end is connected with a node connected with a resistor Rc1 and a resistor Rb 1.
The working principle is as follows:
the amplifying circuit 100 performs unidirectional amplification on the sampled output current signal CS + (also called an output signal), and sends the amplified signal to a shared end (share + end), and meanwhile, divides the voltage of the signal at the shared end (share + end) through a resistor R1 and a resistor R2, and sends the divided voltage to a positive phase end (3 end) of the operational amplifier U1A.
The output current signal CS + is transmitted to the negative phase end (2 end) of the operational amplifier U1A after passing through the resistor R3, the signal of the sharing end (share + end) is transmitted to the positive phase end (3 end) of the operational amplifier U1A after being subjected to voltage division through the resistor R1 and the resistor R2, and the output current signal CS + is transmitted to the signal of the negative phase end (2 end) of the operational amplifier U1A after passing through the resistor R3 for error comparison and amplification.
Preferably, R4, R5 and C1 connected between the 1 terminal and the 2 terminal of the operational amplifier U1A are gain and loop adjustment circuits.
When the power supply system works normally, each power supply module connected in parallel shares the voltage signal amplified by the output current signal of each power supply module at the share + end, and the voltage signal amplified by the output current signal is amplified in a single direction, so that the amplified voltage signal of the power supply module with the largest output current becomes dominant and is shared at the share + end, and the voltages of the negative phase end (6 end) and the positive phase end (5 end) of the operational amplifier U1B in the dominant power supply module are equal.
When the power supply system works normally, in each power supply module connected in parallel, as the share + ends are connected together, the voltages of the share + ends of the current equalizing circuits of all the power supply modules are consistent, and the voltage signals after current amplification are unidirectionally amplified, so that the output current of the module is small, and the voltage of the negative phase end (6 end) of the operational amplifier U1B of the current equalizing circuit is greater than the voltage of the positive phase end (5 end); the output current of the module is the largest, the voltage of the negative phase end (6 end) of the operational amplifier U1B of the current equalizing circuit = the voltage of the positive phase end (5 end), the positive phase end (5 end) of the operational amplifier U1B is connected to the inverting end (2 end) of the operational amplifier U1A through a resistor R3, and the inverting end (6 end) of the operational amplifier U1B is connected to the positive phase end (3 end) of the operational amplifier U1A. Therefore, for the power module with the largest output current, the voltage of the positive phase end (end 3) of the operational amplifier U1A of the current sharing circuit = the voltage of the negative phase end (end 2) of the operational amplifier U1A, the control voltage output by the output end (end 1) of the operational amplifier U1A after error amplification is a voltage signal of the positive end of the current signal, and the signal is smaller than the voltage stabilization value of the voltage stabilizing tube D5, the voltage stabilizing tube is turned off and is in a silent state, that is, the current conversion circuit 300 is not controlled, so that the power module with the largest output current keeps the silent state during the period when the output current of the power module is still the largest in each power module.
And the power module with small output current, the voltage of the negative phase end (6 end) of the operational amplifier U1B of the current equalizing circuit is greater than the voltage of the positive phase end (5 end), and the positive phase end (5 end) of the operational amplifier U1B is connected to the inverting end (2 end) of the operational amplifier U1A through the resistor R3, the inverting end (6 end) of the operational amplifier U1B is connected to the positive phase end (3 end) of the operational amplifier U1A, therefore, the power module with small output current, the voltage of the positive phase end (3 end) of the operational amplifier U1A of the current equalizing circuit is greater than the voltage of the inverting end (2 end) of the operational amplifier UA1, the control voltage after error amplification is output current signal + (error value x error amplification factor) output by the output end (1 end) of the operational amplifier U1A, the voltage is higher than the working voltage of the voltage regulator tube to generate current, the control voltage adjusts the current flowing through the resistor Rc1 through the current converting circuit 300, thereby increasing the output voltage of the module with small output current, and further increasing the output current thereof to make the dominant module with small output current close to the dominant module.
Therefore, when multiple power supply modules work in parallel, the power supply module with small output current makes the output current of the power supply module approach to the leading power supply module by improving the output voltage of the power supply module, and the rise of the output voltage is regulated by the control of the voltage feedback loop, so that the overall voltage is stabilized to be a preset value, and better output voltage precision is kept.
In this embodiment specific implementation process, it is integrative that U1A is put to fortune and U1B is put to fortune, it puts IC for 8 feet's two fortune, in this embodiment actual test process, when 8 module current sharing precisions of actual measurement are more than 30% load, the current sharing precision is less than 5%, the current sharing progress is less than 4% in the time of 50-100% load, this embodiment only needs 8 feet two fortune to put IC, it can accomplish current sharing control to cooperate simple peripheral circuit again, and this current sharing circuit can not influence the voltage precision at the in-process of current sharing, can satisfy high current sharing precision, high voltage precision, dynamic response advantage such as rapid and loop stability is good.
The above embodiments are merely preferred embodiments of the present invention, and it should be noted that the above preferred embodiments should not be construed as limiting the present invention. For those skilled in the art, the isolation operational amplifier, the differential amplifier, the constant current hiccup module, and the current equalizing module in the above embodiments may implement functions by adopting other schemes. It will be apparent from the foregoing that modifications and variations can be made in the present invention without departing from the spirit or scope thereof, and it is intended that all such modifications and variations be considered as within the scope of the invention and not in any way exhaustive description thereof.
Claims (10)
1. A current-sharing circuit is applied to a power supply system, the system comprises a plurality of power supply modules which are connected in parallel, each power supply module comprises a power main module, a voltage feedback loop, a sampling resistor and the current-sharing circuit, and the current-sharing circuit is characterized by comprising an amplifying circuit, an error amplifier and a current conversion circuit; the amplifying circuit comprises a unidirectional amplifying unit and a voltage dividing unit;
the first input end of the unidirectional amplification unit is used for being connected with one end of the sampling resistor, the second input end of the unidirectional amplification unit is connected with the second end of the voltage division unit and the first input end of the error amplifier, and the output end of the unidirectional amplification unit is connected with the first end of the voltage division unit and serves as a shared end of the current sharing circuit;
a second input end of the error amplifier is used for being connected with one end of the sampling resistor, and an output end of the error amplifier is connected with an input end of the current conversion circuit;
the output end of the current conversion circuit is connected with the voltage feedback loop;
the amplifying circuit is used for acquiring an output signal of the power main module, performing unidirectional amplification on the output signal to generate a voltage signal, and dividing the voltage signal to generate a voltage dividing signal;
the error amplifier is used for comparing the voltage division signal with the output signal;
the current conversion circuit is used for adjusting the voltage feedback loop when the error amplifier judges that the divided voltage signal is greater than the output signal, so that the output current of the power main module is increased, and the divided voltage signal is equal to the output signal;
and the plurality of power supply modules are connected in parallel through the sharing end.
2. The current sharing circuit according to claim 1, wherein the unidirectional amplification unit comprises an operational amplifier U1B and a diode D1, a positive phase terminal of the operational amplifier U1B is used as a first input terminal of the unidirectional amplification unit, a negative phase terminal of the operational amplifier U1B is used as a second input terminal of the unidirectional amplification unit, an output terminal of the operational amplifier U1B is connected to an anode of the diode D1, and a cathode of the diode D1 is used as a shared terminal.
3. The current sharing circuit according to claim 2, wherein the voltage dividing unit comprises a resistor R1 and a resistor R2 connected in series; one end of the resistor R2 serves as a first end of the voltage division unit, the other end of the resistor R2 is connected with one end of the resistor R1 and then serves as a second end of the voltage division unit, and the other end of the resistor R1 is grounded.
4. The current sharing circuit of claim 1, wherein the error amplifier comprises a resistor R3, an operational amplifier U1A, a gain and loop adjustment unit; one end of the resistor R3 is used as a second input end of the error amplifier, and the other end of the resistor R3 is connected with the first end of the gain and loop regulating unit and the negative phase end of the operational amplifier U1A; and the positive phase end of the operational amplifier U1A is used as the first input end of the error amplifier, and the output end of the operational amplifier U1A is connected with the second end of the gain and loop adjusting unit and then is used as the output end of the error amplifier.
5. The current sharing circuit of claim 4, wherein the gain and loop adjustment unit comprises a resistor R4, a resistor R5 and a capacitor C1, one end of the resistor R4 is used as the first end of the gain and loop adjustment unit, the other end of the resistor R4 is connected with one end of the resistor R5 and one end of the capacitor C1, and the other end of the resistor R5 is connected with the other end of the capacitor C1 and then used as the second end of the gain and loop adjustment unit.
6. The current sharing circuit according to claim 1, wherein the current converting circuit comprises a voltage regulator tube D4, a voltage regulator tube D5, a resistor R7, a resistor R9 and a triode Q1; the cathode of the voltage-stabilizing tube D5 is used as the input end of the current conversion circuit, and the anode of the voltage-stabilizing tube D5 is connected with one end of the resistor R7; the other end of the resistor R7 is connected with the cathode of the voltage-regulator tube D4 and the base of the triode Q1; an emitting electrode of the triode Q1 is connected with one end of the resistor R9, and a collecting electrode of the triode Q1 is used as an output end of the current conversion circuit; the other end of the resistor R9 and the anode of the voltage regulator tube D4 are grounded.
7. A current-sharing circuit is applied to a power supply system, the system comprises a plurality of power supply modules which are connected in parallel, each power supply module comprises a power main module, a voltage feedback loop, a sampling resistor and the current-sharing circuit, and the current-sharing circuit is characterized by comprising an amplifying circuit, an error amplifier and a current conversion circuit;
the amplifying circuit comprises an operational amplifier U1B, a diode D1, a resistor R1 and a resistor R2;
the error amplifier comprises a resistor R3, an operational amplifier U1A, a resistor R4, a resistor R5 and a capacitor C1;
the current conversion circuit comprises a voltage regulator tube D4, a voltage regulator tube D5, a resistor R7, a resistor R9 and a triode Q1;
the positive phase end of the operational amplifier U1B is connected with one end of the resistor R3 and then is used for being connected with one end of the sampling resistor, and the output end of the operational amplifier U1B is connected with the anode of the diode D1; one end of the resistor R1 is connected with the ground, and the other end of the resistor R1 is connected with the negative phase end of the operational amplifier U1B, the positive phase end of the operational amplifier U1A and one end of the resistor R2; the other end of the resistor R2 and the cathode of the diode D1 are used as a shared end; the other end of the resistor R3 is connected with one end of the resistor R4 and the negative phase end of the operational amplifier U1A; the other end of the resistor R4 is connected with one end of the resistor R5 and one end of the capacitor C1; the other end of the resistor R5 is connected with the other end of the capacitor C1, the cathode of the voltage stabilizing tube D5 and the output end of the operational amplifier U1A; the anode of the voltage-stabilizing tube D5 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with the cathode of the voltage-stabilizing tube D4 and the base of the triode Q1, the emitter of the triode Q1 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the ground, and the collector of the triode Q1 is used as the output end of the current-equalizing circuit and is connected with the voltage feedback loop;
and the plurality of power supply modules are connected in parallel through the sharing end.
8. A power supply module comprising a power master module, a voltage feedback loop, a sampling resistor and a current share circuit according to any of claims 1-7; the positive output end of the power main module is connected with the first end of the voltage feedback loop and then is used for being connected with one end of a load, the VFB end of the power main module is connected with the third end of the voltage feedback loop, the GND end of the power main module is connected with the fourth end of the voltage feedback loop and one end of the sampling resistor and then is grounded, and the other end of the sampling resistor is used for being connected with the other end of the load; and the second end of the voltage feedback loop is connected with the output end of the current conversion circuit.
9. The power supply module of claim 8, wherein the voltage feedback loop comprises a resistor Rc1, a resistor Rb1, a resistor Ra1; one end of the resistor Rc1 is used as a first end of the voltage feedback loop, and the other end of the resistor Rc1 is connected with one end of the resistor Rb1 and used as a second end of the voltage feedback loop; the other end of the resistor Rb1 is connected with one end of the resistor Ra1 and is used as a third end of the voltage feedback loop; the other end of the resistor Ra1 serves as the fourth end of the voltage feedback loop.
10. A power supply system comprising a plurality of power supply modules according to any one of claims 8 to 9, said plurality of power supply modules being connected in parallel by a shared terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211481888.6A CN115864802A (en) | 2022-11-24 | 2022-11-24 | Current-sharing circuit, power module and system |
| PCT/CN2023/133683 WO2024109884A1 (en) | 2022-11-24 | 2023-11-23 | Current-sharing circuit, power supply module, and power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211481888.6A CN115864802A (en) | 2022-11-24 | 2022-11-24 | Current-sharing circuit, power module and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115864802A true CN115864802A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211481888.6A Pending CN115864802A (en) | 2022-11-24 | 2022-11-24 | Current-sharing circuit, power module and system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115864802A (en) |
| WO (1) | WO2024109884A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024109884A1 (en) * | 2022-11-24 | 2024-05-30 | 广州金升阳科技有限公司 | Current-sharing circuit, power supply module, and power supply system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH066308A (en) * | 1992-06-23 | 1994-01-14 | Fujitsu Ltd | Light reception agc circuit |
| CN201813159U (en) * | 2010-09-28 | 2011-04-27 | 石家庄国耀电子科技有限公司 | Power parallel machine flow equalization circuit with bidirectional adjustable output voltage |
| CN203104320U (en) * | 2013-03-26 | 2013-07-31 | 卧龙电气集团股份有限公司 | High-power parallel switch power circuit capable of realizing adjustable current sharing |
| CN104377964B (en) * | 2014-12-01 | 2017-04-19 | 中国电子科技集团公司第四十三研究所 | Integrated control circuit on basis of voltage loop feedback and automatic load current sharing |
| CN115864802A (en) * | 2022-11-24 | 2023-03-28 | 广州金升阳科技有限公司 | Current-sharing circuit, power module and system |
-
2022
- 2022-11-24 CN CN202211481888.6A patent/CN115864802A/en active Pending
-
2023
- 2023-11-23 WO PCT/CN2023/133683 patent/WO2024109884A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024109884A1 (en) * | 2022-11-24 | 2024-05-30 | 广州金升阳科技有限公司 | Current-sharing circuit, power supply module, and power supply system |
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| WO2024109884A1 (en) | 2024-05-30 |
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