CN216600145U - Novel current-sharing circuit using current-sharing inductor - Google Patents
Novel current-sharing circuit using current-sharing inductor Download PDFInfo
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- CN216600145U CN216600145U CN202123220997.6U CN202123220997U CN216600145U CN 216600145 U CN216600145 U CN 216600145U CN 202123220997 U CN202123220997 U CN 202123220997U CN 216600145 U CN216600145 U CN 216600145U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model provides a novel current-sharing circuit using a current-sharing inductor, which comprises a converter, wherein a direct current anode output by the converter is connected with a first current-sharing device, a direct current cathode output by the converter is connected with a second current-sharing device, one output end of the first current-sharing device is sequentially connected with a first diode D1, a first load LED1, a sampling resistor RES and one output end of the second current-sharing device, the other output end of the first current-sharing device is sequentially connected with a second diode D2, a second load LED2 and the other output end of the second current-sharing device, the novel current-sharing circuit further comprises a first filter capacitor EC1 and a second filter capacitor EC2, the first filter capacitor EC1 is connected with the second load LED2 in parallel, and the second filter capacitor EC2 is connected with the first load LED1 and the sampling resistor RES in parallel. The utility model solves the problems of low current sharing precision, high multi-path output expanding cost and huge system in the prior art.
Description
Technical Field
The utility model relates to the technical field of driving power supplies, in particular to a novel current-sharing circuit using a current-sharing inductor.
Background
The current equalizing circuit applied to the LED driving power supply generally adopts the following mode:
1. a first passive current sharing scheme: the current equalizing is realized by serially connecting the capacitors in all the branches, the structure is simple, and the expansion is convenient. Although the scheme is simple in structure and convenient to expand, the scheme is only suitable for an LLC topological structure, and can be realized by using a capacitor with better precision, and can be used under the condition of low requirement on current equalizing effect.
2. An active current sharing scheme: the current control is realized by using a current regulator composed of a switch tube and other active devices and a certain control circuit. Although the scheme has high current sharing precision, the scheme also has the defect that a system with higher cost is huge for the expansion of the multipath output.
3. A second passive current sharing scheme: the scheme is that a current-sharing transformer is used for realizing multi-path current sharing, the connection between coupling inductors is utilized to enable a circuit change of one path to be coupled to another path so as to realize current sharing, but the deviation of the inductance value of the transformer and the deviation of the output voltage influence the precision of current sharing.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel current-sharing circuit using a current-sharing inductor, which aims to solve the problems of low current-sharing precision and large system with a complex multi-output expanded structure in the prior art.
In order to solve the technical problem, the utility model provides a novel current-sharing circuit using a current-sharing inductor, which comprises a converter, wherein a direct-current positive electrode output by the converter is connected with a first current-sharing device, a direct-current negative electrode output by the converter is connected with a second current-sharing device, one output end of the first current-sharing device is sequentially connected with a first diode D1, a first load LED1, a sampling resistor RES and one output end of the second current-sharing device, the other output end of the first current-sharing device is sequentially connected with a second diode D2, a second load LED2 and the other output end of the second current-sharing device, and the novel current-sharing circuit further comprises a first filter capacitor EC1 and a second filter capacitor EC2, the first filter capacitor EC1 is connected with the second load LED2 in parallel, and the second filter capacitor EC2 is connected with the first load LED1 and the sampling resistor RES in parallel.
The LED driving circuit further comprises a controller, an isolating device and a detection feedback circuit which are sequentially connected in series, wherein the controller is connected with the converter, and the detection feedback circuit is connected between the first load LED1 and the sampling resistor RES.
The first current equalizer and the second current equalizer are respectively a first current equalizing inductor and a second current equalizing inductor, and the synonym end of a first winding of the first current equalizing inductor is connected with the synonym end of a second winding of the second current equalizing inductor in sequence, the first diode D1, the first load LED1, the sampling resistor RES and the sampling resistor RES.
And the dotted terminal of the second winding of the first current-sharing inductor is sequentially connected with the second diode D2, the second load LED2 and the dotted terminal of the first winding of the second current-sharing inductor.
The homonymous terminal of the first winding of the first current-sharing inductor and the heteronymous terminal of the second winding of the first current-sharing inductor are connected with the direct-current positive electrode output by the converter; and the synonym end of the first winding of the second current-sharing inductor and the synonym end of the second winding of the second current-sharing inductor are connected with the DC negative pole output by the converter.
And the synonym terminal of the second winding of the second current-sharing inductor is grounded.
A sampling point IS provided between the first load LED1 and the sampling resistor RES.
The utility model has the following beneficial effects: the novel current-sharing circuit using the current-sharing inductors has the advantages of high current-sharing precision, convenience in multi-path output expansion, small size and low cost, and the layout is more flexible due to the two current-sharing inductors.
Drawings
FIG. 1 is a system block diagram of a novel current share circuit using current share inductors in accordance with the present invention;
fig. 2 is a hardware connection diagram of a novel current sharing circuit using current sharing inductors according to the present invention.
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 with reference to the following embodiments.
As shown in fig. 1-2, the present invention provides a novel current-sharing circuit using a current-sharing inductor, including a converter, where a dc positive electrode output by the converter is connected to a first current-sharing device, a dc negative electrode output by the converter is connected to a second current-sharing device, an output end of the first current-sharing device is sequentially connected to a first diode D1, a first load LED1, a sampling resistor RES, and an output end of the second current-sharing device, another output end of the first current-sharing device is sequentially connected to a second diode D2, a second load LED2, and another output end of the second current-sharing device, and further includes a first filter capacitor EC1 and a second filter capacitor EC2, the first filter capacitor EC1 is connected in parallel to the second load LED2, and the second filter capacitor EC2 is connected in parallel to the first load LED1 and the sampling resistor RES.
Further, the LED driving circuit further comprises a controller, an isolation device and a detection feedback line which are sequentially connected in series, wherein the controller is connected with the converter, and the detection feedback line is connected between the first load LED1 and the sampling resistor RES.
Further, the first current equalizer and the second current equalizer are respectively a first current equalizing inductor and a second current equalizing inductor, and a synonym terminal of a first winding of the first current equalizing inductor is sequentially connected with a synonym terminal of a first diode D1, a first load LED1, a sampling resistor RES and a second winding of the second current equalizing inductor.
Further, the dotted terminal of the second winding of the first current sharing inductor is sequentially connected to the second diode D2, the second load LED2, and the dotted terminal of the first winding of the second current sharing inductor.
Furthermore, the dotted terminal of the first winding of the first current-sharing inductor and the unlike terminal of the second winding of the first current-sharing inductor are connected with the direct-current positive electrode output by the converter; and the synonym end of the first winding of the second current-sharing inductor and the synonym end of the second winding of the second current-sharing inductor are connected with the DC negative pole output by the converter.
Further, the synonym terminal of the second winding of the second current sharing inductor is grounded.
Further, a sampling point IS provided between the first load LED1 and the sampling resistor RES.
The first load LED1 and the second load LED2 represent two paths of loads in the circuit, the first filter capacitor EC1 and the second filter capacitor EC2 are filter capacitors of two paths of output circuits, and the sampling resistor RES is used as a sampling part of output current; the first current-sharing inductor is placed on a positive line of the circuit, is divided into two branches through a first winding and a second winding and is respectively connected with a first diode D1 and a second diode D2, is rectified through a first diode D1 and a second diode D2 and then is respectively connected with a first filter capacitor EC1 and a second filter capacitor EC2 of the energy storage filter capacitor, and is respectively connected with a first load LED1 and a second load LED2 of the load after electrolytic filtering.
In summary, the novel current-sharing circuit using the current-sharing inductors has the advantages of high current-sharing precision, convenience for expansion of multipath output, small volume and low cost, and the layout is more flexible due to the use of the two current-sharing inductors.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. A novel current-sharing circuit using a current-sharing inductor is characterized in that: the current equalizer comprises a converter, the positive direct current pole of converter output connects first current equalizer, the second current equalizer is connected to the direct current negative pole of converter output, an output of first current equalizer connects gradually first diode D1, first load LED1, sampling resistance RES, an output of second current equalizer, another output of first current equalizer connects gradually second diode D2, second load LED2, another output of second current equalizer, still including first filter capacitor EC1, second filter capacitor EC2, first filter capacitor EC1 and second load LED2 are parallelly connected, second filter capacitor EC2 and first load LED1, sampling resistance RES are parallelly connected.
2. The new current-sharing circuit using current-sharing inductor as claimed in claim 1, further comprising a controller, an isolation device, and a detection feedback circuit connected in series in sequence, wherein the controller is connected to the converter, and the detection feedback circuit is connected between the first load LED1 and the sampling resistor RES.
3. The new current-sharing circuit using current-sharing inductors as claimed in claim 1, wherein the first current-sharing inductor and the second current-sharing inductor are respectively a first current-sharing inductor and a second current-sharing inductor, and the synonym terminal of the first winding of the first current-sharing inductor is connected with the synonym terminal of the first diode D1, the first load LED1, the sampling resistor RES and the synonym terminal of the second winding of the second current-sharing inductor in sequence.
4. The novel current sharing circuit using current sharing inductors as claimed in claim 3, wherein the dotted terminal of the second winding of the first current sharing inductor is connected with the dotted terminal of the second diode D2, the second load LED2 and the first winding of the second current sharing inductor in sequence.
5. The new current-sharing circuit using current-sharing inductors as claimed in claim 3, wherein the homonymous terminal of the first winding of the first current-sharing inductor and the heteronymous terminal of the second winding of the first current-sharing inductor are connected to the dc positive pole of the converter output; and the synonym end of the first winding of the second current-sharing inductor and the synonym end of the second winding of the second current-sharing inductor are connected with the DC negative pole output by the converter.
6. The new current share circuit using current share inductors as claimed in claim 3, wherein the synonym terminal of the secondary winding of the second current share inductor is grounded.
7. The new current-sharing circuit using current-sharing inductor as claimed in claim 1, wherein a sampling point IS provided between the first load LED1 and the sampling resistor RES.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123220997.6U CN216600145U (en) | 2021-12-21 | 2021-12-21 | Novel current-sharing circuit using current-sharing inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123220997.6U CN216600145U (en) | 2021-12-21 | 2021-12-21 | Novel current-sharing circuit using current-sharing inductor |
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| Publication Number | Publication Date |
|---|---|
| CN216600145U true CN216600145U (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123220997.6U Active CN216600145U (en) | 2021-12-21 | 2021-12-21 | Novel current-sharing circuit using current-sharing inductor |
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| CN (1) | CN216600145U (en) |
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2021
- 2021-12-21 CN CN202123220997.6U patent/CN216600145U/en active Active
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