CN102290977B - Flow equalization control circuit of switching power supply maximum value with offset direct current - Google Patents
Flow equalization control circuit of switching power supply maximum value with offset direct current Download PDFInfo
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- CN102290977B CN102290977B CN 201110252479 CN201110252479A CN102290977B CN 102290977 B CN102290977 B CN 102290977B CN 201110252479 CN201110252479 CN 201110252479 CN 201110252479 A CN201110252479 A CN 201110252479A CN 102290977 B CN102290977 B CN 102290977B
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Abstract
The invention discloses a control circuit of switching power supply maximum value flow equalization with offset direct current. The control circuit comprises an operational amplifier N1 (1), an operational amplifier N2 (2), an operational amplifier N3 (3), a diode V1, an NPN triode V2, resistors R1-R15 and a capacitor C1, wherein the components are connected by PCB (printed circuit board) lead wires. The circuit firstly compares a current sampling signal of the switching power supply with a flow equalization bus signal, and then takes a maximum value as the given value of the flow equalization control circuit, a proportion integration adjusting circuit adjusts collector electrode current of the NPN triode V2, the resistor R11 is a pull-up resistor to provide the offset direct current for the flow equalization control circuit so as to overcome a disturbance signal on a flow equalization bus. The flow equalization control circuit has the characteristic of strong capability of resisting disturbance, can self-set a pull-up resistor value as required so as to change the offset size of the direct current, can overcome the disturbance signal introduced by the flow equalization bus, and is applied to flow equalization of various switching power supplies.
Description
Technical field
The present invention relates to a kind of equalizing control circuit of Switching Power Supply, particularly a kind of Switching Power Supply maximum equalizing control circuit with direct current biasing.
Background technology
At present in the Switching Power Supply equalizing control circuit, the equal stream mode technology maturation of maximum, reliability height, applied widely, be the main flow of using.UC3902 is the maximum sharing control chip that TI company produces, inner integrated a reference source, comparator, error amplifier circuit.Only need increase some resistance in the periphery during use, electric capacity gets final product, and therefore have the advantage that volume is little, function is complete.
But the UC3902 control chip can only use the circuit of chip internal owing to carried out hardware curing on function during fault, the user can't carry out the setting of circuit parameter, is subjected to external disturbance during use easily.
Summary of the invention
The object of the present invention is to provide a kind of Switching Power Supply maximum equalizing control circuit with direct current biasing, the parameter that solves special integrated circuit can not be provided with, be subject to interference problem.
A kind of Switching Power Supply maximum equalizing control circuit with direct current biasing, comprising: operational amplifier N1, operational amplifier N2, operational amplifier N3 also comprise: diode V1, NPN type triode V2, resistance R 1-resistance R 15 and capacitor C 1.
One end of resistance R 1 is connected with output current sampled signal end, and resistance R 1 other end is connected with the in-phase input terminal of operational amplifier N1; The in-phase input terminal of operational amplifier N1 is connected resistance R 3 other end ground connection simultaneously with an end of resistance R 3; The reversed input terminal of operational amplifier N1 is connected with resistance R 2 one ends, resistance R 2 other end ground connection; The lead-out terminal of operational amplifier N1 is connected with the anode of diode V1, and the negative electrode of diode V1 is connected with positive current equalizing bus bar; One end of resistance R 4 is connected with the negative electrode of diode V1, and the other end of resistance R 4 is connected with the reversed input terminal of operational amplifier N1; Resistance R 5 one ends are connected with the in-phase input terminal of operational amplifier N2, and resistance R 5 other ends are connected with the negative electrode of diode V1; Resistance R 6 one ends are connected with the in-phase input terminal of operational amplifier N2, resistance R 6 other end ground connection; Resistance R 7 one ends are connected with the reversed input terminal of operational amplifier N2, and resistance R 7 other ends are connected with negative current equalizing bus bar; The two ends of resistance R 8 are connected with lead-out terminal with the reversed input terminal of operational amplifier N2 respectively; Resistance R 9 one ends are connected with the lead-out terminal of operational amplifier N2, and resistance R 9 other ends are connected with the in-phase input terminal of operational amplifier N3; Resistance R 10 1 ends are connected with output current sampled signal end, and resistance R 10 other ends are connected with the reversed input terminal of operational amplifier N3; Resistance R 11 1 terminations power supply positive voltage terminal, resistance R 11 other ends are connected with the reversed input terminal of operational amplifier N3; Resistance R 12 1 ends are connected with capacitor C 1 one ends, and resistance R 12 other ends are connected with the reversed input terminal of operational amplifier N3, and capacitor C 1 other end is connected with the lead-out terminal of operational amplifier N3; Resistance R 13 1 ends are connected with the lead-out terminal of operational amplifier N3, and resistance R 13 other ends are connected with the base stage of triode V2; Resistance R 14 1 ends are connected with the base stage of triode V2, resistance R 14 other end ground connection; Resistance R 15 1 ends are connected with the emitter of triode V2, resistance R 15 other end ground connection, and the collector electrode of triode V2 is connected with the current-sharing signal end; Each components and parts connect by printed conductor.
The current sampling signal of Switching Power Supply and current equalizing bus bar signal are by operational amplifier N1 and resistance R 1, resistance R 2, resistance R 3, resistance R 4, after comparing, the comparison circuit that diode V1 constitutes gets maximum, again by operational amplifier N2 and resistance R 5, resistance R 6, resistance R 7, the differential type amplifying circuit that resistance R 8 constitutes amplifies back given as equalizing control circuit, by by operational amplifier N3 and resistance R 9, resistance R 12, the proportional integral regulating circuit that capacitor C 1 constitutes is regulated the base drive electric current of triode V2, thereby adjust the collector current of triode V2, realize flow equalizing function; Resistance R 11 is a pull-up resistor, for equalizing control circuit provides a direct current biasing, is used for overcoming the interference signal on the current equalizing bus bar.
The present invention has the strong characteristics of antijamming capability, and the user can set up the pull-up resistor resistance as required on their own, thereby changes the size of direct current biasing, overcomes the interference signal that current equalizing bus bar is introduced, and is suitable for the sharing control of various Switching Power Supplies.
Description of drawings
A kind of Switching Power Supply maximum equalizing control circuit structure chart of Fig. 1 with direct current biasing.
1. operational amplifier N12. operational amplifier N23. operational amplifier N3
Embodiment
A kind of Switching Power Supply maximum equalizing control circuit with direct current biasing comprises: operational amplifier N11, and operational amplifier N22, operational amplifier N33 also comprises: diode V1, NPN type triode V2, resistance R 1-resistance R 15 and capacitor C 1.
One end of resistance R 1 is connected with output current sampled signal end, and resistance R 1 other end is connected with the in-phase input terminal of operational amplifier N11; The in-phase input terminal of operational amplifier N11 is connected resistance R 3 other end ground connection simultaneously with an end of resistance R 3; The reversed input terminal of operational amplifier N11 is connected with resistance R 2 one ends, resistance R 2 other end ground connection; The lead-out terminal of operational amplifier N11 is connected with the anode of diode V1, and the negative electrode of diode V1 is connected with positive current equalizing bus bar; One end of resistance R 4 is connected with the negative electrode of diode V1, and the other end of resistance R 4 is connected with the reversed input terminal of operational amplifier N11; Resistance R 5 one ends are connected with the in-phase input terminal of operational amplifier N22, and resistance R 5 other ends are connected with the negative electrode of diode V1; Resistance R 6 one ends are connected with the in-phase input terminal of operational amplifier N22, resistance R 6 other end ground connection; Resistance R 7 one ends are connected with the reversed input terminal of operational amplifier N22, and resistance R 7 other ends are connected with negative current equalizing bus bar; The two ends of resistance R 8 are connected with lead-out terminal with the reversed input terminal of operational amplifier N22 respectively; Resistance R 9 one ends are connected with the lead-out terminal of operational amplifier N22, and resistance R 9 other ends are connected with the in-phase input terminal of operational amplifier N33; Resistance R 10 1 ends are connected with output current sampled signal end, and resistance R 10 other ends are connected with the reversed input terminal of operational amplifier N33; Resistance R 11 1 terminations power supply positive voltage, resistance R 11 other ends are connected with the reversed input terminal of operational amplifier N33; Resistance R 12 1 ends are connected with capacitor C 1 one ends, and the other end is connected with the reversed input terminal of operational amplifier N33, and capacitor C 1 other end is connected with the lead-out terminal of operational amplifier N3; Resistance R 13 1 ends are connected with the lead-out terminal of operational amplifier N33, and resistance R 13 other ends are connected with the base stage of triode V2; Resistance R 14 1 ends are connected with the base stage of triode V2, resistance R 14 other end ground connection; Resistance R 15 1 ends are connected with the emitter of triode V2, resistance R 15 other end ground connection, and the collector electrode of triode V2 is connected with the current-sharing signal end; Each components and parts connect by printed conductor.
The current sampling signal of Switching Power Supply and current equalizing bus bar signal are by operational amplifier N11 and resistance R 1, resistance R 2, resistance R 3, resistance R 4, after comparing, the comparison circuit that diode V1 constitutes gets maximum, again by operational amplifier N22 and resistance R 5, resistance R 6, resistance R 7, the differential type amplifying circuit that resistance R 8 constitutes amplifies back given as equalizing control circuit, by by operational amplifier N33 and resistance R 9, resistance R 12, the proportional integral regulating circuit that capacitor C 1 constitutes is regulated the base drive electric current of triode V2, thereby adjust the collector current of triode V2, realize flow equalizing function; Resistance R 11 is a pull-up resistor, for equalizing control circuit provides a direct current biasing, is used for overcoming the interference signal on the current equalizing bus bar.
Claims (1)
1. Switching Power Supply maximum equalizing control circuit with direct current biasing, comprise: operational amplifier N1(1), operational amplifier N2(2), operational amplifier N3(3), it is characterized in that also comprising: diode V1, NPN type triode V2, resistance R 1-resistance R 15 and capacitor C 1;
One end of resistance R 1 is connected with output current sampled signal end, resistance R 1 other end and operational amplifier N1(1) in-phase input terminal be connected; Operational amplifier N1(1) in-phase input terminal is connected resistance R 3 other end ground connection simultaneously with an end of resistance R 3; Operational amplifier N1(1) reversed input terminal is connected with resistance R 2 one ends, resistance R 2 other end ground connection; Operational amplifier N1(1) lead-out terminal is connected with the anode of diode V1, and the negative electrode of diode V1 is connected with positive current equalizing bus bar; One end of resistance R 4 is connected with the negative electrode of diode V1, the other end of resistance R 4 and operational amplifier N1(1) reversed input terminal be connected; Resistance R 5 one ends and operational amplifier N2(2) in-phase input terminal be connected, resistance R 5 other ends are connected with the negative electrode of diode V1; Resistance R 6 one ends and operational amplifier N2(2) in-phase input terminal be connected resistance R 6 other end ground connection; Resistance R 7 one ends and operational amplifier N2(2) reversed input terminal be connected, resistance R 7 other ends are connected with negative current equalizing bus bar; The two ends of resistance R 8 respectively with operational amplifier N2(2) reversed input terminal be connected with lead-out terminal; Resistance R 9 one ends and operational amplifier N2(2) lead-out terminal be connected resistance R 9 other ends and operational amplifier N3(3) in-phase input terminal be connected; Resistance R 10 1 ends are connected with output current sampled signal end, resistance R 10 other ends and operational amplifier N3(3) reversed input terminal be connected; Resistance R 11 1 terminations power supplies positive voltage, resistance R 11 other ends and operational amplifier N3(3) reversed input terminal be connected; Resistance R 12 1 ends are connected with capacitor C 1 one ends, resistance R 12 other ends and operational amplifier N3(3) reversed input terminal be connected capacitor C 1 other end and operational amplifier N3(3) lead-out terminal be connected; Resistance R 13 1 ends and operational amplifier N3(3) lead-out terminal be connected, resistance R 13 other ends are connected with the base stage of triode V2; Resistance R 14 1 ends are connected with the base stage of triode V2, resistance R 14 other end ground connection; Resistance R 15 1 ends are connected with the emitter of triode V2, resistance R 15 other end ground connection, and the collector electrode of triode V2 is connected with the current-sharing signal end; Each components and parts connect by printed conductor;
The current sampling signal of Switching Power Supply and current equalizing bus bar signal are by operational amplifier N1(1) and resistance R 1, resistance R 2, resistance R 3, resistance R 4, after comparing, the comparison circuit that diode V1 constitutes gets maximum, again by operational amplifier N2(2) and resistance R 5, resistance R 6, resistance R 7, the differential type amplifying circuit that resistance R 8 constitutes amplifies back given as equalizing control circuit, by by operational amplifier N3(3) and resistance R 9, resistance R 12, the proportional integral regulating circuit that capacitor C 1 constitutes is regulated the base drive electric current of triode V2, thereby adjust the collector current of triode V2, realize flow equalizing function; Resistance R 11 is a pull-up resistor, for equalizing control circuit provides a direct current biasing, is used for overcoming the interference signal on the current equalizing bus bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110252479 CN102290977B (en) | 2011-08-30 | 2011-08-30 | Flow equalization control circuit of switching power supply maximum value with offset direct current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110252479 CN102290977B (en) | 2011-08-30 | 2011-08-30 | Flow equalization control circuit of switching power supply maximum value with offset direct current |
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| Publication Number | Publication Date |
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| CN102290977A CN102290977A (en) | 2011-12-21 |
| CN102290977B true CN102290977B (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110252479 Active CN102290977B (en) | 2011-08-30 | 2011-08-30 | Flow equalization control circuit of switching power supply maximum value with offset direct current |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710135A (en) * | 2012-06-25 | 2012-10-03 | 北京机械设备研究所 | Current equalization circuit for multi-module shunt-wound power supply |
| CN111158415B (en) * | 2018-11-08 | 2022-02-15 | 中车株洲电力机车研究所有限公司 | Current sharing control device and method for power module |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460320A (en) * | 2001-03-23 | 2003-12-03 | 皇家菲利浦电子有限公司 | Switch-mode power supply with autonomous primary inverter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6166455A (en) * | 1999-01-14 | 2000-12-26 | Micro Linear Corporation | Load current sharing and cascaded power supply modules |
| US7076217B1 (en) * | 1999-11-23 | 2006-07-11 | Micro Linear Corporation | Integrated radio transceiver |
| US6236582B1 (en) * | 2000-02-01 | 2001-05-22 | Micro Linear Corporation | Load share controller for balancing current between multiple supply modules |
| US6465909B1 (en) * | 2000-07-31 | 2002-10-15 | Linear Technology Corporation | Circuits and methods for controlling load sharing by multiple power supplies |
| JP2010041908A (en) * | 2008-07-08 | 2010-02-18 | Calsonic Kansei Corp | Motor drive |
| CN101882867B (en) * | 2010-06-28 | 2013-08-07 | 浙江大华技术股份有限公司 | Anti-strong interference switch control signal generating circuit of system power supply |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1460320A (en) * | 2001-03-23 | 2003-12-03 | 皇家菲利浦电子有限公司 | Switch-mode power supply with autonomous primary inverter |
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