CN206992962U - A kind of power supply adaptor output circuit - Google Patents
A kind of power supply adaptor output circuit Download PDFInfo
- Publication number
- CN206992962U CN206992962U CN201720729538.5U CN201720729538U CN206992962U CN 206992962 U CN206992962 U CN 206992962U CN 201720729538 U CN201720729538 U CN 201720729538U CN 206992962 U CN206992962 U CN 206992962U
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- circuit
- transistor
- switch pipe
- bridge switch
- power supply
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Abstract
It the utility model is related to a kind of power supply adaptor output circuit; mainly solves the problems, such as output parameter monotechnics present in prior art; the utility model includes overload protecting circuit by using the power supply adaptor output circuit; the predrive circuit being connected with overload protecting circuit; the level shifting circuit being connected with predrive circuit; the output-stage circuit being connected with level shifting circuit by inverter circuit, the warning circuit being connected with output-stage circuit；The level shifting circuit includes transformer T1, switch element 2 and control unit, the secondary of the transformer T1 includes the secondary units (3) of n cascade, the secondary units (3) are connected with switch element (2), and the switch element (2) is controlled by control unit；Technical scheme, the problem is preferably resolved, available in the industrial production of power supply adaptor.
Description
Technical field
Power output circuit field is the utility model is related to, is related specifically to a kind of power supply adaptor output circuit.
Background technology
Power supply adaptor includes 5V power supply adaptors, 9V power supplys by every field extensive use, in general power supply adaptor
Establishing device, 12V power supply adaptors, 24V power supply adaptors.Power supply adaptor be miniature portable be by power supply conversion set
It is standby.Typically it is made up of shell, power transformer, rectification circuit, it, which is exported, can be divided into exchange output type and direct-current-output type.
Existing power supply adaptor is usually that input is 220V civil powers, is exported as 5V, 9V, 12V, 24V etc..It is present, defeated
Go out the single nonadjustable technical problem of voltage.Therefore it provides a kind of output voltage is adjustable, there is the power supply adaptor of defencive function
Output circuit is with regard to necessary.
Utility model content
Technical problem to be solved in the utility model is output parameter Single-issue present in prior art.There is provided one
Kind new power supply adaptor output circuit, the power supply adaptor output circuit have that output voltage is adjustable, reliability is high, function is complete
The characteristics of kind.
In order to solve the above technical problems, the technical scheme used is as follows：
A kind of power supply adaptor output circuit, the power supply adaptor output circuit includes overload protecting circuit, with overload
The predrive circuit of protection circuit connection, the level shifting circuit being connected with predrive circuit, passes through anti-with level shifting circuit
The output-stage circuit of phase device circuit connection, the warning circuit being connected with output-stage circuit；
The level shifting circuit includes transformer T1, switch element 2 and control unit, the secondary bag of the transformer T1
The secondary units 3 of n cascade are included, the secondary units 3 are connected with switch element 2, and it is single that the switch element 2 is controlled by control
Member；
Wherein, n is positive integer.
Operation principle of the present utility model：The utility model realizes that power supply adaptor is defeated by using level shifting circuit
It is adjustable to go out voltage.By way of multiple secondary units 3 are carried out to the secondary of transformer and are cascaded, by being carried out to secondary units 3
Control, the conversion multiple of transformer can be adjusted, so as to complete the control to output voltage.
In above-mentioned technical proposal, for optimization, further, the predrive circuit includes open loop full-bridge circuit with opening
The Buck/Boost converters of ring full-bridge circuit connection.
Further, the output-stage circuit includes the transistor P1 being sequentially connected, transistor P2, transistor N1 and crystal
Pipe N2；The drain electrode of the transistor P1 connects voltage VDDH ends, source electrode connection transistor P2 drain electrode, transistor P2 source electrode and crystalline substance
Body pipe N1 drain electrode connections, transistor N1 source electrode are connected with transistor N2 drain electrode；The transistor P2 grids, transistor N2
Grid is connected with voltage vdd terminal, the drain electrode of transistor P2 source electrode and transistor P1；The transistor P2 source electrodes and transistor N2
Drain electrode collectively forms voltage adapter output end, and is connected with the warning circuit.
Further, the warning circuit includes radio alarming circuit and buzzer alarm circuit.
Further, the radio alarming circuit includes radio alarming circuit, the channel radio being connected with radio alarming circuit
Interrogate unit.
Further, the inverter circuit includes phase inverter Inv1, phase inverter Inv2, phase inverter InV3, phase inverter
Inv4；The phase inverter Inv1 and phase inverter Inv2 is cascaded, and the phase inverter InV3 and phase inverter Inv4 is cascaded.
Further, the open loop full-bridge circuit includes bridge switch pipe V1, bridge switch pipe V2, bridge switch pipe
V3 and bridge switch pipe V4, clamp diode D1, clamp diode D2, resonant inductor Lr, capacitance C, transformer T and whole
Flow filter circuit；Described T level of transformer is N number of winding, and the secondary windings is connected with current rectifying and wave filtering circuit, the transformer
T armature winding is connected to capacitance C；The bridge switch pipe V1 source electrodes pass through resonant inductor Lr and bridge switch pipe V2
Source electrode connects, and bridge switch pipe V1 source electrodes connect with bridge switch pipe V3 drain electrodes, bridge switch pipe V2 source electrodes and bridge switch pipe
V4 drain electrode connections；The bridge switch pipe V1 drain electrodes connect altogether with bridge switch pipe V2 drain electrodes；The bridge switch pipe V3 source electrodes with
Bridge switch pipe V4 source electrodes join altogether；The clamp diode D1 is connected to bridge switch pipe V3 sources after being connected with clamp diode D2
Between pole and bridge switch pipe V1 drain electrodes, the clamp diode D1 connects with clamp diode D2 common ports and resonant inductor Lr
Connect；Wherein, N is positive integer.
Further, the overload protecting circuit includes current foldback circuit and overvoltage crowbar.
The utility model, using open loop full-bridge mapping mode, on the one hand can reduce power supply by using predrive circuit
Control complexity, while open loop approach greatly improves the conversion efficiency of power supply, has great lifting to the reliability of power supply.
Therefore, this programme has obvious advantage in volume, weight, efficiency and independent control etc..By Inv1, Inv2 and
The chain of inverters of Inv3, Inv4 composition plays a part of amplifying driving force, regulation output circuit delay.Inv1, Inv2 are connected on
Between VDDH and VDD, and Inv3, Inv4 are connected between VDD and GND.Output-stage circuit is made up of transistor P1, P2, N1, N2.
Transistor P2, N2 grid meet VDD, not high this assures P1, N1 drain-to-gate voltage and P2, N2 gate source voltage, from
And avoid P1, P2, N1, N2 grid oxygen overpressure problems.
This uses new beneficial effect：
Effect one, improve the possibility of output voltage；
Effect two, improves reliability；
Effect three, improve property easy to use.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1, power supply adaptor output circuit schematic diagram in embodiment 1.
Fig. 2, output-stage circuit schematic diagram.
Fig. 3, open loop full-bridge circuit schematic diagram.
In accompanying drawing, 1- transformers T1 is primary, 2- switch elements 2,3- secondary units 3.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this practicality
It is new, it is not used to limit the utility model.
Embodiment 1
Such as Fig. 1, the present embodiment provides a kind of power supply adaptor output circuit, and the power supply adaptor output circuit included
Carry protection circuit, the predrive circuit being connected with overload protecting circuit, the level shifting circuit being connected with predrive circuit, with electricity
The output-stage circuit that flat change-over circuit is connected by inverter circuit, the warning circuit being connected with output-stage circuit；The level
Change-over circuit includes transformer T1, switch element 2 and control unit, the primary connection predrive circuit outputs of the transformer T1
End, T1 level of transformer include the secondary units 3 of 8 cascades, and the secondary units 3 are connected with switch element 2, and the switch is single
Member 2 is controlled by control unit.
Workflow of the present utility model：The utility model realizes that power supply adaptor is defeated by using level shifting circuit
It is adjustable to go out voltage.By way of multiple secondary units 3 are carried out to the secondary of transformer and are cascaded, by being carried out to secondary units 3
Control, the conversion multiple of transformer can be adjusted, so as to complete the control to output voltage.
The control complexity of power supply, improve reliability, it is preferable that the predrive circuit includes open loop full-bridge circuit
The Buck/Boost converters being connected with open loop full-bridge circuit.
Such as Fig. 2, to avoid transistor grid oxygen over-pressed, it is preferable that the output-stage circuit includes the transistor being sequentially connected
P1, transistor P2, transistor N1 and transistor N2；The drain electrode of the transistor P1 connects voltage VDDH ends, source electrode connection transistor
P2 drain electrode, transistor P2 source electrode and transistor N1 drain electrodes are connected, and transistor N1 source electrode is connected with transistor N2 drain electrode；
The transistor P2 grids, transistor N2 grid are connected with voltage vdd terminal, the leakage of transistor P2 source electrode and transistor P1
Pole；The transistor P2 source electrodes collectively form voltage adapter output end with transistor N2 drain electrodes, and connect with the warning circuit
Connect.、
Specifically, the warning circuit includes radio alarming circuit and buzzer alarm circuit.Carried out by buzzer high
The sound prompting of frequency.
Specifically, the radio alarming circuit includes radio alarming circuit, the wireless telecommunications being connected with radio alarming circuit
Unit.By radio alarming circuit, when power supply adaptor current work exception, user is informed by radio communication unit.
To improve driving force, it is preferable that the inverter circuit includes phase inverter Inv1, phase inverter Inv2, phase inverter
InV3, phase inverter Inv4；The phase inverter Inv1 and phase inverter Inv2 is cascaded, the phase inverter InV3 and phase inverter Inv4 levels
Connection.
Such as Fig. 3, the open loop full-bridge circuit includes bridge switch pipe V1, bridge switch pipe V2, bridge switch pipe V3
And bridge switch pipe V4, clamp diode D1, clamp diode D2, resonant inductor Lr, capacitance C, transformer T and rectification
Filter circuit；Described T level of transformer is 2 windings, and the secondary windings is connected with current rectifying and wave filtering circuit, the transformer T
Armature winding be connected to capacitance C；The bridge switch pipe V1 source electrodes pass through resonant inductor Lr and bridge switch pipe V2
Source electrode connects, and bridge switch pipe V1 source electrodes connect with bridge switch pipe V3 drain electrodes, bridge switch pipe V2 source electrodes and bridge switch pipe
V4 drain electrode connections；The bridge switch pipe V1 drain electrodes connect altogether with bridge switch pipe V2 drain electrodes；The bridge switch pipe V3 source electrodes with
Bridge switch pipe V4 source electrodes join altogether；The clamp diode D1 is connected to bridge switch pipe V3 sources after being connected with clamp diode D2
Between pole and bridge switch pipe V1 drain electrodes, the clamp diode D1 connects with clamp diode D2 common ports and resonant inductor Lr
Connect.Wherein, current rectifying and wave filtering circuit includes inductance L1 and electric capacity C1.Inductance Ln and electric capacity Cn composition n-th current rectifying and wave filtering circuits.
To improve reliability and stability, it is preferable that the overload protecting circuit includes current foldback circuit and overvoltage is protected
Protection circuit.
Although the illustrative embodiment of the utility model is described above, in order to the art
Technical staff is it will be appreciated that the utility model, but the utility model is not limited only to the scope of embodiment, to this technology
For the those of ordinary skill in field, as long as long as the utility model that various change is limited and determined in appended claim
In spirit and scope, all are created in the row of protection using the utility model of the utility model design.
Claims (8)
- A kind of 1. power supply adaptor output circuit, it is characterised in that：The power supply adaptor output circuit includes overload protection electricity Road, the predrive circuit being connected with overload protecting circuit, the level shifting circuit being connected with predrive circuit, with level conversion electricity The output-stage circuit that road is connected by inverter circuit, the warning circuit being connected with output-stage circuit；The level shifting circuit includes transformer T1, switch element 2 and control unit, and the secondary of the transformer T1 includes n The secondary units (3) of individual cascade, the secondary units (3) are connected with switch element (2), and the switch element (2) is controlled by control Unit processed；Wherein, n is positive integer.
- 2. power supply adaptor output circuit according to claim 1, it is characterised in that：The predrive circuit includes open loop The Buck/Boost converters that full-bridge circuit is connected with open loop full-bridge circuit.
- 3. power supply adaptor output circuit according to claim 1, it is characterised in that：The output-stage circuit is included successively The transistor P1 of connection, transistor P2, transistor N1 and transistor N2；The drain electrode of the transistor P1 connects voltage VDDH ends, source Pole connection transistor P2 drain electrode, transistor P2 source electrode and transistor N1 drain electrodes connect, transistor N1 source electrode and transistor N2 drain electrode connection；The transistor P2 grids, transistor N2 grid are connected with voltage vdd terminal, transistor P2 source electrode and Transistor P1 drain electrode；The transistor P2 source electrodes and transistor N2 drain electrode collectively form voltage adapter output end, and with institute State warning circuit connection.
- 4. power supply adaptor output circuit according to claim 1, it is characterised in that：The warning circuit is included without report from a liner Alert circuit and buzzer alarm circuit.
- 5. power supply adaptor output circuit according to claim 4, it is characterised in that：The radio alarming circuit includes nothing Line warning circuit, the radio communication unit being connected with radio alarming circuit.
- 6. power supply adaptor output circuit according to claim 3, it is characterised in that：The inverter circuit includes anti-phase Device Inv1, phase inverter Inv2, phase inverter InV3, phase inverter Inv4；The phase inverter Inv1 and phase inverter Inv2 is cascaded, described Phase inverter InV3 and phase inverter Inv4 is cascaded.
- 7. power supply adaptor output circuit according to claim 2, it is characterised in that：The open loop full-bridge circuit bag Include bridge switch pipe V1, bridge switch pipe V2, bridge switch pipe V3 and bridge switch pipe V4, clamp diode D1, two poles of clamp Pipe D2, resonant inductor Lr, capacitance C, transformer T and current rectifying and wave filtering circuit；Described T level of transformer is N number of winding, and the secondary windings is connected with current rectifying and wave filtering circuit, the primary of the transformer T Winding is connected to capacitance C；The bridge switch pipe V1 source electrodes are connected by resonant inductor Lr with bridge switch pipe V2 source electrodes, bridge switch pipe V1 sources Pole connects with bridge switch pipe V3 drain electrodes, and bridge switch pipe V2 source electrodes connect with bridge switch pipe V4 drain electrodes；The bridge switch Pipe V1 drains to be connected altogether with bridge switch pipe V2 drain electrodes；The bridge switch pipe V3 source electrodes join altogether with bridge switch pipe V4 source electrodes；The clamp diode D1 is connected to bridge switch pipe V3 source electrodes and bridge switch pipe V1 after being connected with clamp diode D2 Between drain electrode, the clamp diode D1 is connected with clamp diode D2 common ports with resonant inductor Lr；Wherein, N is positive integer.
- 8. power supply adaptor output circuit according to claim 1, it is characterised in that：The overload protecting circuit included Flow protection circuit and overvoltage crowbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720729538.5U CN206992962U (en) | 2017-06-22 | 2017-06-22 | A kind of power supply adaptor output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720729538.5U CN206992962U (en) | 2017-06-22 | 2017-06-22 | A kind of power supply adaptor output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206992962U true CN206992962U (en) | 2018-02-09 |
Family
ID=61395861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720729538.5U Expired - Fee Related CN206992962U (en) | 2017-06-22 | 2017-06-22 | A kind of power supply adaptor output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206992962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112202324A (en) * | 2020-08-26 | 2021-01-08 | 南京市晨枭软件技术有限公司 | Output overload protection circuit for terminal equipment adapter and protection method thereof |
-
2017
- 2017-06-22 CN CN201720729538.5U patent/CN206992962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112202324A (en) * | 2020-08-26 | 2021-01-08 | 南京市晨枭软件技术有限公司 | Output overload protection circuit for terminal equipment adapter and protection method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180209 Termination date: 20180622 |