CN204244084U - A kind of DC-DC multiplex output circuit - Google Patents
A kind of DC-DC multiplex output circuit Download PDFInfo
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- CN204244084U CN204244084U CN201420774057.2U CN201420774057U CN204244084U CN 204244084 U CN204244084 U CN 204244084U CN 201420774057 U CN201420774057 U CN 201420774057U CN 204244084 U CN204244084 U CN 204244084U
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- output circuit
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Abstract
The utility model relates to electronic circuit technology field, and referring to especially can a kind of DC-DC multiplex output circuit.Comprise transformer, the auxiliary output circuit of main output circuit and at least one road; Described transformer comprises a road armature winding and at least two-way secondary winding, and main output circuit and auxiliary output circuit are connected a road secondary winding respectively; The first metal-oxide-semiconductor is provided with in main output circuit, the secondary winding two ends that the drain electrode of the first metal-oxide-semiconductor is connected at main output circuit with sources connected in parallel, the output of described main output circuit is connected with first control circuit, and the described first control circuit other end connects the grid of described first metal-oxide-semiconductor; Be provided with the second metal-oxide-semiconductor in auxiliary output circuit, the output of described auxiliary output circuit is connected with second control circuit, and the described second control circuit other end connects the grid of the second metal-oxide-semiconductor.The utility model provides a kind of DC-DC multiplex output circuit, and every road exports all has feedback loop, and every road exports and can independently control accurately.
Description
Technical field
The utility model relates to electronic circuit technology field, and referring to especially can a kind of DC-DC multiplex output circuit.
Background technology
At present, the DC-DC output power supply circuit of multiple-channel output is just widely used.Generally have the main output in road and multiple auxiliary in circuit to export, and only have main output to have access to negative feedback, output can be made constant according to the ON time of the real-time by-pass cock of change of input or load.When main output control duty ratio fixing after, auxiliary output voltage also can keep constant when input voltage changes.But when the load of main output or auxiliary output changes, auxiliary output just can not carry out accurate separately adjustment, can only keep relative stable along with the change of main output.
Summary of the invention
In order to solve prior art Problems existing, the utility model provides a kind of DC-DC multiplex output circuit, and every road exports all has feedback loop, and every road exports and can independently control accurately.
For solving the problems of the technologies described above, the utility model provides following technical scheme:
A kind of DC-DC multiplex output circuit, comprises transformer, the auxiliary output circuit of main output circuit and at least one road;
Described transformer comprises a road armature winding and at least two-way secondary winding, and main output circuit and auxiliary output circuit are connected a road secondary winding respectively;
The first metal-oxide-semiconductor is provided with in main output circuit, the secondary winding two ends that the drain electrode of described first metal-oxide-semiconductor is connected at main output circuit with sources connected in parallel, the output of described main output circuit is connected with first control circuit, and the described first control circuit other end connects the grid of described first metal-oxide-semiconductor;
The second metal-oxide-semiconductor is provided with in auxiliary output circuit, the secondary winding two ends that the drain electrode of described second metal-oxide-semiconductor is connected at auxiliary output circuit with sources connected in parallel, the output of described auxiliary output circuit is connected with second control circuit, and the described second control circuit other end connects the grid of described second metal-oxide-semiconductor.
Further, be provided with the first coupling inductance in described main output circuit, described first coupling inductance is serially connected between the Same Name of Ends of the secondary winding that main output circuit connects and the drain electrode of the first metal-oxide-semiconductor.
Further, be provided with the second coupling inductance in described auxiliary output circuit, described second coupling inductance is serially connected between the Same Name of Ends of the secondary winding that auxiliary output circuit connects and the drain electrode of the second metal-oxide-semiconductor.
Further, described transformer is forward structure.
Further, the first devices, the first filter inductance and the first filter capacitor is provided with in described main output circuit;
Described first devices is serially connected between the different name end of the secondary winding that main output circuit connects and the source electrode of the first metal-oxide-semiconductor;
Between the drain electrode that described first filter capacitor is connected in parallel on the first metal-oxide-semiconductor and source electrode;
Described first filter inductance is serially connected in drain electrode and first filter capacitor one end of the first metal-oxide-semiconductor.
Further, the second devices, the second filter inductance and the second filter capacitor is provided with in described auxiliary output circuit;
Described second devices is serially connected between the different name end of the secondary winding that auxiliary output circuit connects and the source electrode of the second metal-oxide-semiconductor;
Between the drain electrode that described second filter capacitor is connected in parallel on the second metal-oxide-semiconductor and source electrode;
Described second filter inductance is serially connected in drain electrode and second filter capacitor one end of the second metal-oxide-semiconductor.
Compared with prior art, its remarkable advantage is the utility model:
1, a kind of DC-DC multiplex output circuit of providing of the utility model, control circuit is all had to feed back to metal-oxide-semiconductor in output circuit at the output of main output circuit and auxiliary output circuit, regulate the break-make of metal-oxide-semiconductor to carry out regulation output by control circuit, every road exports and can independently control accurately;
2, the synchronous rectifier in main output circuit and auxiliary output circuit all adopts metal-oxide-semiconductor, instead of diode, and because the conducting resistance of metal-oxide-semiconductor is less than diode current flow resistance, conduction loss is little, can improve the efficiency of whole circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.In these accompanying drawings, for the sake of clarity, may be exaggerated size and the relative size in structure and region.
Fig. 1 is the circuit theory diagrams of a kind of DC-DC multiplex output circuit in the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical solution of the utility model is clearly and completely described.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
embodiment 1:
See accompanying drawing 1, the present embodiment is for doubleway output, and the auxiliary output of the main output in road and a road, certainly, the utility model also can be applicable to 3 tunnels, 4 tunnels or more road and exports, and is not construed as limiting this.A kind of DC-DC multiplex output circuit, comprises transformer, the auxiliary output circuit of main output circuit and at least one road; Described transformer comprises a road armature winding L0 and at least two-way secondary winding, and main output circuit and auxiliary output circuit are connected a road secondary winding respectively; The first metal-oxide-semiconductor Q12 is provided with in main output circuit, the secondary winding L1 two ends that the drain electrode of described first metal-oxide-semiconductor Q12 is connected at main output circuit with sources connected in parallel, the output of described main output circuit is connected with first control circuit, and the described first control circuit other end connects the grid of described first metal-oxide-semiconductor Q12; The second metal-oxide-semiconductor Q22 is provided with in auxiliary output circuit, the secondary winding two ends that the drain electrode of described second metal-oxide-semiconductor Q22 is connected at auxiliary output circuit with sources connected in parallel, the output of described auxiliary output circuit is connected with second control circuit, and the described second control circuit other end connects the grid of described second metal-oxide-semiconductor Q22.
Further, be provided with the first coupling inductance L11 in described main output circuit, described first coupling inductance L11 is serially connected between the Same Name of Ends of the secondary winding L1 that main output circuit connects and the drain electrode of the first metal-oxide-semiconductor Q12; Be provided with the second coupling inductance L21 in described auxiliary output circuit, described second coupling inductance L21 is serially connected between the Same Name of Ends of the secondary winding L2 that auxiliary output circuit connects and the drain electrode of the second metal-oxide-semiconductor Q22; Transformer described in the present embodiment adopts forward structure.
Further, the first devices Q11, the first filter inductance L12 and the first filter capacitor C11 is provided with in described main output circuit; Described first devices Q11 is serially connected between the different name end of the secondary winding L1 that main output circuit connects and the source electrode of the first metal-oxide-semiconductor Q12; Between the drain electrode that described first filter capacitor C11 is connected in parallel on the first metal-oxide-semiconductor Q12 and source electrode; Described first filter inductance L12 is serially connected in drain electrode and first filter capacitor C11 one end of the first metal-oxide-semiconductor Q12.Due to the existence of the first coupling inductance L11 and the second coupling inductance L21, the electric current in circuit can not instantaneous variation, ensure that the current constant flowing through the first filter inductance L12 and the second filter inductance L22.
Further, the second devices Q21, the second filter inductance L22 and the second filter capacitor C21 is provided with in described auxiliary output circuit; Described second devices Q21 is serially connected between the different name end of the secondary winding L2 that auxiliary output circuit connects and the source electrode of the second metal-oxide-semiconductor Q22; Between the drain electrode that described second filter capacitor C21 is connected in parallel on the second metal-oxide-semiconductor Q22 and source electrode; Described second filter inductance L22 is serially connected in drain electrode and second filter capacitor C21 one end of the second metal-oxide-semiconductor Q22.
Be parallel with sampling resistor R11 and R12 at the output of described main output circuit, described first control circuit is connected to the public connecting end of sampling resistor R11 and R12; Be parallel with sampling resistor R21 and R22 at the output of described auxiliary output circuit, described second control circuit is connected to the public connecting end of sampling resistor R21 and R22.
The first diode D1 is serially connected with between the different name end and DC power supply DC positive pole of described armature winding L0, the second diode D2 is serially connected with between the Same Name of Ends of armature winding L0 and DC power supply DC ground, Same Name of Ends and the negative electrode of the first diode D1 of armature winding L0 are connected drain electrode and the source electrode of the first rectifying tube QS1 respectively, and different name end and the anode of the second diode D2 of armature winding L0 are connected source electrode and the drain electrode of the second rectifying tube QS2 respectively.
A kind of DC-DC multiplex output circuit that the utility model provides, control circuit is all had to feed back to metal-oxide-semiconductor in output circuit at the output of main output circuit and auxiliary output circuit, regulate the break-make of metal-oxide-semiconductor to carry out regulation output by control circuit, every road exports and can independently control accurately; And the synchronous rectifier in main output circuit and auxiliary output circuit all adopts metal-oxide-semiconductor, instead of diode, because the conducting resistance of metal-oxide-semiconductor is less than diode current flow resistance, conduction loss is little, can improve the efficiency of whole circuit.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, equivalently to replace and improvement etc., within the protection range that all should be included in this technical scheme.
Claims (6)
1. a DC-DC multiplex output circuit, is characterized in that: comprise transformer, the auxiliary output circuit of main output circuit and at least one road;
Described transformer comprises a road armature winding and at least two-way secondary winding, and main output circuit and auxiliary output circuit are connected a road secondary winding respectively;
The first metal-oxide-semiconductor is provided with in main output circuit, the secondary winding two ends that the drain electrode of described first metal-oxide-semiconductor is connected at main output circuit with sources connected in parallel, the output of described main output circuit is connected with first control circuit, and the described first control circuit other end connects the grid of described first metal-oxide-semiconductor;
The second metal-oxide-semiconductor is provided with in auxiliary output circuit, the secondary winding two ends that the drain electrode of described second metal-oxide-semiconductor is connected at auxiliary output circuit with sources connected in parallel, the output of described auxiliary output circuit is connected with second control circuit, and the described second control circuit other end connects the grid of described second metal-oxide-semiconductor.
2. a kind of DC-DC multiplex output circuit as claimed in claim 1, it is characterized in that: be provided with the first coupling inductance in described main output circuit, described first coupling inductance is serially connected between the Same Name of Ends of the secondary winding that main output circuit connects and the drain electrode of the first metal-oxide-semiconductor.
3. a kind of DC-DC multiplex output circuit as claimed in claim 1, it is characterized in that: be provided with the second coupling inductance in described auxiliary output circuit, described second coupling inductance is serially connected between the Same Name of Ends of the secondary winding that auxiliary output circuit connects and the drain electrode of the second metal-oxide-semiconductor.
4. a kind of DC-DC multiplex output circuit as claimed in claim 1, is characterized in that: described transformer is forward structure.
5. a kind of DC-DC multiplex output circuit as claimed in claim 1, is characterized in that: be provided with the first devices, the first filter inductance and the first filter capacitor in described main output circuit;
Described first devices is serially connected between the different name end of the secondary winding that main output circuit connects and the source electrode of the first metal-oxide-semiconductor;
Between the drain electrode that described first filter capacitor is connected in parallel on the first metal-oxide-semiconductor and source electrode;
Described first filter inductance is serially connected in drain electrode and first filter capacitor one end of the first metal-oxide-semiconductor.
6. a kind of DC-DC multiplex output circuit as claimed in claim 1, is characterized in that: be provided with the second devices, the second filter inductance and the second filter capacitor in described auxiliary output circuit;
Described second devices is serially connected between the different name end of the secondary winding that auxiliary output circuit connects and the source electrode of the second metal-oxide-semiconductor;
Between the drain electrode that described second filter capacitor is connected in parallel on the second metal-oxide-semiconductor and source electrode;
Described second filter inductance is serially connected in drain electrode and second filter capacitor one end of the second metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774057.2U CN204244084U (en) | 2014-12-09 | 2014-12-09 | A kind of DC-DC multiplex output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774057.2U CN204244084U (en) | 2014-12-09 | 2014-12-09 | A kind of DC-DC multiplex output circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204244084U true CN204244084U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420774057.2U Expired - Fee Related CN204244084U (en) | 2014-12-09 | 2014-12-09 | A kind of DC-DC multiplex output circuit |
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| CN (1) | CN204244084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067171A (en) * | 2018-08-28 | 2018-12-21 | 广州金升阳科技有限公司 | Multiple-output electric power |
-
2014
- 2014-12-09 CN CN201420774057.2U patent/CN204244084U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067171A (en) * | 2018-08-28 | 2018-12-21 | 广州金升阳科技有限公司 | Multiple-output electric power |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20151209 |
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| EXPY | Termination of patent right or utility model |