CN214544105U - Multi-output power circuit - Google Patents
Multi-output power circuit Download PDFInfo
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- CN214544105U CN214544105U CN202120814168.1U CN202120814168U CN214544105U CN 214544105 U CN214544105 U CN 214544105U CN 202120814168 U CN202120814168 U CN 202120814168U CN 214544105 U CN214544105 U CN 214544105U
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Abstract
The utility model provides a multi-output power circuit, which comprises a primary circuit and a secondary circuit, wherein the primary circuit comprises a charge pump voltage inverter, a first capacitor, a second capacitor, a third capacitor, a first switch and a primary winding, the charge pump voltage inverter is provided with a flying capacitor positive terminal and a flying capacitor negative terminal, one end of the first capacitor is connected with the output end of the charge pump voltage inverter, the other end is grounded, one end of the second capacitor is connected with the input end of the charge pump voltage inverter, the other end is grounded, one end of the third capacitor is connected with the flying capacitor positive terminal, the other end is connected with the flying capacitor negative terminal, one end of the primary winding is connected with the input end of the charge pump voltage inverter, the other end is connected with the first end of the first switch, the second end of the first switch is grounded, the control end of the first switch is connected with the flying capacitor negative terminal, the multi-path output of the power circuit is realized, and the cost for replacing the switch is reduced.
Description
Technical Field
The utility model belongs to the technical field of isolation power drive technique and specifically relates to indicate a multiplexed output power supply circuit.
Background
In the fields of motor drive, industrial control, IGBT (insulated gate bipolar transistor) drivers, communication buses, data acquisition, switching power supplies and the like, low-power and low-power isolated power supplies are often adopted, and the requirements on the volume, the integration level and the cost of the isolated power supplies are high.
The isolated power transformer driver drives the transformer to transmit energy through the built-in switch, the power borne by the switch is relatively fixed, so that the power is relatively fixed and cannot be flexibly used, and the structure only has one output path, possibly cannot meet the requirements of multiple paths of different outputs of some products, and the use cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a multiplexed output power supply circuit aims at solving the built-in switching power of current isolated power transformer driver and fixes, can not carry out multiplexed voltage output's problem.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a multi-output power circuit comprises a primary circuit and a secondary circuit, wherein the primary circuit comprises a charge pump voltage inverter, a first capacitor, a second capacitor, a third capacitor, a first switch and a primary winding, the charge pump voltage inverter is provided with a flying capacitor positive end and a flying capacitor negative end, one end of the first capacitor is connected with the output end of the charge pump voltage inverter, the other end of the first capacitor is grounded, one end of the second capacitor is connected with the input end of the charge pump voltage inverter, the other end of the second capacitor is grounded, one end of the third capacitor is connected with the positive end of the flying capacitor, the other end of the third capacitor is connected with the negative end of the flying capacitor, one end of the primary winding is connected with the input end of the charge pump voltage inverter, the other end of the primary winding is connected with the first end of the first switch, the second end of the first switch is grounded, and the control end of the first switch is connected with the positive end of the flying capacitor.
The secondary circuit comprises a secondary winding and a rectifying circuit connected with the secondary winding.
The output end of the charge pump voltage inverter is a first output end of the multi-output power circuit.
The output end of the rectifying circuit is a second output end of the multi-output power circuit.
The beneficial effects of the utility model reside in that:
the utility model discloses a flying capacitor positive terminal control external first switch of charge pump voltage inverter is closed with output voltage to vice limit circuit, and the output direct output negative voltage through charge pump voltage inverter has simultaneously realized multichannel voltage output, and first switch can need nimble the selection according to the output of vice limit circuit simultaneously, and it is wider to compare the adaptability with the built-in switch of driver chip, has saved the cost.
Drawings
The following detailed description of the specific structure of the present invention with reference to the accompanying drawings
Fig. 1 is a schematic structural diagram of a multi-output power circuit provided in an embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1, fig. 1 is a block diagram of a multi-output power circuit according to an embodiment of the present invention. As shown IN fig. 1, a multi-output power circuit includes a primary side circuit 100 and a secondary side circuit 200, the primary side circuit 100 includes a charge pump voltage inverter 110, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first switch S1 and a primary side winding T1, the charge pump voltage inverter 110 has a flying capacitor positive terminal (C1+ pin) and a flying capacitor negative terminal (C1-pin), one end of the first capacitor C1 is connected to an output terminal (OUT pin) of the charge pump voltage inverter 110, the other end is grounded, one end of the second capacitor C2 is connected to an input terminal (IN pin) of the charge pump voltage inverter 110, the other end is grounded, one end of the third capacitor C3 is connected to the flying capacitor positive terminal (C1+ pin), the other end is connected to the flying capacitor negative terminal (C1-pin), one end of the winding T1 is connected to an input terminal (IN pin) of the charge pump voltage inverter 110, the other end of the first switch S1 is connected to the first end of the first switch S1, the second end of the first switch S1 is grounded, and the control end of the first switch S1 is connected to the flying capacitor positive terminal (pin C1 +.
The beneficial effects of the utility model reside in that:
the utility model discloses a flying capacitor positive terminal (C1+ pin) of charge pump voltage inverter 110 of primary circuit 100 controls external first switch S1 closed with output voltage to secondary circuit 200, output (OUT pin) direct output negative voltage through charge pump voltage inverter 110 itself simultaneously, multichannel voltage output has been realized, first switch S1 can be selected according to the demand is nimble simultaneously, primary circuit 100 also can produce bigger electric current when secondary circuit 200 load is great, the optional first switch S1 that uses higher power, it is wider to compare adaptability with the built-in switch of drive chip, the cost is saved.
Further, the secondary side circuit includes a secondary side winding T2, and a rectifying circuit D1 connected to the secondary side winding T2.
Further, the output terminal (OUT pin) of the charge pump voltage inverter 110 is a first output terminal (Vout1 pin) of the multi-output power supply circuit.
Further, the output end of the rectifying circuit D1 is a second output end (Vout2 pin) of the multi-output power supply circuit.
Note that the input terminal (IN pin) of the charge pump voltage inverter 110 is also the input terminal (Vin pin) of the multi-output power supply circuit.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (4)
1. A multi-output power circuit is characterized in that the circuit comprises a primary side circuit and a secondary side circuit, the primary side circuit comprises a charge pump voltage inverter, a first capacitor, a second capacitor, a third capacitor, a first switch and a primary side winding, the charge pump voltage inverter is provided with a flying capacitor positive end and a flying capacitor negative end, one end of the first capacitor is connected with the output end of the charge pump voltage inverter, the other end of the first capacitor is grounded, one end of the second capacitor is connected with the input end of the charge pump voltage inverter, the other end of the second capacitor is grounded, one end of the third capacitor is connected with the positive end of the flying capacitor, the other end of the third capacitor is connected with the negative end of the flying capacitor, one end of the primary winding is connected with the input end of the charge pump voltage inverter, the other end of the primary winding is connected with the first end of the first switch, the second end of the first switch is grounded, and the control end of the first switch is connected with the positive end of the flying capacitor.
2. The multi-output power supply circuit according to claim 1, wherein the secondary circuit includes a secondary winding, and a rectifying circuit connected to the secondary winding.
3. The multi-output power supply circuit as claimed in claim 2, wherein the output of the charge pump voltage inverter is a first output of the multi-output power supply circuit.
4. The multi-output power supply circuit as claimed in claim 2, wherein the output terminal of the rectifying circuit is a second output terminal of the multi-output power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120814168.1U CN214544105U (en) | 2021-04-20 | 2021-04-20 | Multi-output power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120814168.1U CN214544105U (en) | 2021-04-20 | 2021-04-20 | Multi-output power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214544105U true CN214544105U (en) | 2021-10-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120814168.1U Active CN214544105U (en) | 2021-04-20 | 2021-04-20 | Multi-output power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214544105U (en) |
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2021
- 2021-04-20 CN CN202120814168.1U patent/CN214544105U/en active Active
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