CN205596021U - MOS manages switching transformer control circuit - Google Patents
MOS manages switching transformer control circuit Download PDFInfo
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- CN205596021U CN205596021U CN201620217525.5U CN201620217525U CN205596021U CN 205596021 U CN205596021 U CN 205596021U CN 201620217525 U CN201620217525 U CN 201620217525U CN 205596021 U CN205596021 U CN 205596021U
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Abstract
The utility model discloses a MOS manages switching transformer control circuit, manage VT2, transformer T and diode D2 including diode D1, MOS pipe VT1, MOS, input voltage ui one end and MOS pipe VT1's the D utmost point is connected respectively to diode D1 negative pole, and MOS manages VT1's the S utmost point and connects transformer T coil L1, diode D5 positive pole and diode D2 negative pole respectively, and diode D6 negative pole is connected to diode D5 negative pole, and the transformer T coil L1 other end, MOS pipe VT2's the D utmost point and diode D1 positive pole are connected respectively to diode D6 positive pole. The utility model discloses MOS manages switching transformer control circuit can effectively prevent the too big problem of stress among MOS pipe VT1 and the VT2, has promoted the life of MOS pipe, and circuit structure is simple, and is with low costs, and application scope is wide.
Description
Technical field
This utility model relates to a kind of control circuit, specifically a kind of metal-oxide-semiconductor switch transformer control circuit.
Background technology
Along with device, the developing rapidly of technological level, switching power converter has evolved into efficient, light-duty DC source,
Spacecraft (star, arrow, ship etc.) DC/DC changer (also known as secondary power supply) is also adopted by this technology.
Main cause is that satellite electronic equipment is more and more higher to the requirement of efficiency, weight, volume and the reliability of power supply, and passes
The linear power supply scheme of system almost cannot meet the needs of aerocraft system.In various types of DC/DC changers, PWM type
DC/DC changer is many because of structure species, technological precedence, it is simple to realizes, has been used widely.
The Switching Power Supply of multiple-channel output, great majority use Two-stage converter, as Buck+ recommends Two-stage converter,
First pass through Buck circuit busbar voltage blood pressure lowering, such busbar voltage to be adjusted through secondary, to make voltage regulation factor reduce；
For again from number of devices, two-stage topology, power switch pipe at least needs 3, and power volume is big and power density is low,
Less desirable from unitary analysis；And for the double tube positive exciting Switching Power Supply that can bear high input voltage, circuit structure phase
To simply, but it is not suitable for the occasion of multiple-channel output, and output cross regulation rate is relatively low, and degree of stability is poor；In being suitable for
The circuit topology of small-power multiple-channel output DC-DC converter is also single switch flyback circuit, and its circuit structure is simple, low cost,
But the voltage stress of single switch flyback main circuit switching tube is the highest in high input voltage occasion, select the most pressure MOSFET
Pipe cannot meet the requirement of fall volume at all, if selecting the highest pressure MOSFET pipe, owing to its conducting resistance is higher, gesture
The conversion efficiency of power supply must be affected, be also possible to the low pressure discharge problem brought under vacuum environment simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of metal-oxide-semiconductor switch transformer control circuit, to solve in above-mentioned background technology
The problem proposed.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of metal-oxide-semiconductor switch transformer control circuit, including diode D1, metal-oxide-semiconductor VT1, metal-oxide-semiconductor VT2, transformator T
With diode D2, described diode D1 negative pole connects the D pole of input voltage Ui one end and metal-oxide-semiconductor VT1, metal-oxide-semiconductor respectively
The S pole of VT1 connection transformer T coil L1, diode D5 positive pole and diode D2 negative pole, diode D5 negative pole respectively
Connect diode D6 negative pole, diode D6 positive pole the connection transformer T coil L1 other end, the D pole of metal-oxide-semiconductor VT2 respectively
With diode D1 positive pole, the S pole of metal-oxide-semiconductor VT2 connects diode D2 positive pole and the input voltage Ui other end, transformation respectively
Device T coil L2 one end connects diode D3 positive pole, and diode D3 negative pole connects diode D4 negative pole and output voltage respectively
Uo one end, the output voltage Uo other end connects diode D4 positive pole and the transformator T coil L2 other end respectively.
As further program of the utility model: G pole connection control signal V1 of described metal-oxide-semiconductor VT1.
As this utility model further scheme: G pole connection control signal V2 of described metal-oxide-semiconductor VT2.
Compared with prior art, the beneficial effects of the utility model are: this utility model metal-oxide-semiconductor switch transformer control circuit,
The problem that the stress in metal-oxide-semiconductor VT1 and VT2 is excessive be can effectively prevent, the service life of metal-oxide-semiconductor, circuit structure improved
Simply, low cost, applied widely.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of metal-oxide-semiconductor switch transformer control circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Refer to Fig. 1, in this utility model embodiment, a kind of metal-oxide-semiconductor switch transformer control circuit, including diode D1,
Metal-oxide-semiconductor VT1, metal-oxide-semiconductor VT2, transformator T and diode D2, described diode D1 negative pole connects input voltage Ui respectively
The D pole of one end and metal-oxide-semiconductor VT1, the S pole of metal-oxide-semiconductor VT1 connection transformer T coil L1, diode D5 positive pole respectively
With diode D2 negative pole, diode D5 negative pole connects diode D6 negative pole, diode D6 positive pole connection transformer T respectively
The coil L1 other end, the D pole of metal-oxide-semiconductor VT2 and diode D1 positive pole, the S pole of metal-oxide-semiconductor VT2 connects diode respectively
D2 positive pole and the input voltage Ui other end, transformator T coil L2 one end connects diode D3 positive pole, diode D3 negative pole
Connecting diode D4 negative pole and output voltage Uo one end respectively, the output voltage Uo other end connects diode D4 positive pole respectively
With the transformator T coil L2 other end；G pole connection control signal V1 of described metal-oxide-semiconductor VT1；Described metal-oxide-semiconductor VT2's
G pole connection control signal V2.
Operation principle of the present utility model is: refers to Fig. 1, VT1 and VT2 and is serially connected with top and the end of transformator T respectively
End, transformator T coil L1 upper end and coil L2 lower end are Same Name of Ends, V1 and V2 control VT1 and VT2 simultaneously turn on and
Turning off, when they turn on, the Same Name of Ends of transformator T coil L1 and coil L2 is that just now D3 is reverse-biased, transformator T
No current circulation in coil L2, transformator T coil L1 stores energy；When VT1 and VT2 turns off, it is stored in transformator
Electric current on T coil L1 makes transformator T coil L1 and L2 polarity of voltage reverse, and D3 positively biased, in transformator T coil L1
The energy stored is transferred to the load that output voltage Uo connects, and now transformator T Same Name of Ends current potential is clamped by diode D2
Position to ground, transformator T different name terminal potential be clamped to input voltage Ui. by diode D1 so, the source voltage of VT1 will not
Drain voltage more than Ui, VT2 is not more than Ui, and leakage inductance spike is clamped, and makes VT1 and VT2 either switch pipe
Big voltage stress is all without exceeding maximum DC input voitage, so that being extended the service life of VT1 and VT2；Additionally
Transformer coil also 6 can be carried out clamper, further because of the peak voltage that leakage inductance produces by diode D5 and Zener diode D
Improve the safety of circuit.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.
Therefore, no matter from the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, this practicality is new
The scope of type is limited by claims rather than described above, it is intended that by the containing of equivalency in claim that fall
All changes in justice and scope are included in this utility model.Should not be considered as any reference in claim limiting
Involved claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only comprises
One independent technical scheme, this narrating mode of description is only the most for clarity sake, and those skilled in the art should be by
Description is as an entirety, and the technical scheme in each embodiment can also be through appropriately combined, and forming those skilled in the art can
With other embodiments understood.
Claims (3)
1. a metal-oxide-semiconductor switch transformer control circuit, including diode D1, metal-oxide-semiconductor VT1, metal-oxide-semiconductor VT2, transformator
T and diode D2, it is characterised in that described diode D1 negative pole connects input voltage Ui one end and metal-oxide-semiconductor VT1 respectively
D pole, the S pole of metal-oxide-semiconductor VT1 connection transformer T coil L1, diode D5 positive pole and diode D2 negative pole respectively,
Diode D5 negative pole connects diode D6 negative pole, diode D6 positive pole the connection transformer T coil L1 other end, MOS respectively
The D pole of pipe VT2 and diode D1 positive pole, the S pole of metal-oxide-semiconductor VT2 connects diode D2 positive pole and input voltage Ui respectively
The other end, transformator T coil L2 one end connects diode D3 positive pole, and diode D3 negative pole connects diode D4 respectively and bears
Pole and output voltage Uo one end, the output voltage Uo other end connects diode D4 positive pole respectively and transformator T coil L2 is another
One end.
A kind of metal-oxide-semiconductor switch transformer control circuit the most according to claim 1, it is characterised in that described metal-oxide-semiconductor
G pole connection control signal V1 of VT1.
A kind of metal-oxide-semiconductor switch transformer control circuit the most according to claim 1, it is characterised in that described metal-oxide-semiconductor
G pole connection control signal V2 of VT2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620217525.5U CN205596021U (en) | 2016-03-21 | 2016-03-21 | MOS manages switching transformer control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620217525.5U CN205596021U (en) | 2016-03-21 | 2016-03-21 | MOS manages switching transformer control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205596021U true CN205596021U (en) | 2016-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620217525.5U Expired - Fee Related CN205596021U (en) | 2016-03-21 | 2016-03-21 | MOS manages switching transformer control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN205596021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187250A (en) * | 2019-06-05 | 2019-08-30 | 吉林华微电子股份有限公司 | Test method and test macro |
-
2016
- 2016-03-21 CN CN201620217525.5U patent/CN205596021U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187250A (en) * | 2019-06-05 | 2019-08-30 | 吉林华微电子股份有限公司 | Test method and test macro |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160921 Termination date: 20170321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |