CN206908517U - A kind of ultra-wide input two-way voltage-stabilizing output DC DC Switching Power Supplies - Google Patents
A kind of ultra-wide input two-way voltage-stabilizing output DC DC Switching Power Supplies Download PDFInfo
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- CN206908517U CN206908517U CN201720646052.5U CN201720646052U CN206908517U CN 206908517 U CN206908517 U CN 206908517U CN 201720646052 U CN201720646052 U CN 201720646052U CN 206908517 U CN206908517 U CN 206908517U
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Abstract
A kind of ultra-wide input two-way voltage-stabilizing output DC DC Switching Power Supplies, the on-off circuit uses two switching tubes, switching voltage stress on two switching tubes is more much smaller than the stress of prior art single switching transistor, there are more selections in the type selecting of switching tube, and the switching loss of two switching tubes, than enjoying the small of technology single switching transistor, heating similarly can be much smaller, and its input voltage is up to DC1500V, certain raising is also obtained in power-efficient this part, so as to improve power supply reliability.
Description
Technical field
Technical field of electronic equipment is the utility model is related to, more specifically, it relates to the Switching Power Supply skill of photovoltaic industry
Art, more particularly to a kind of ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies.
Background technology
DC-DC Switching Power Supplies are the important components of photovoltaic generation, electric automobile and communication power supply.With China's photovoltaic
Industry, new-energy automobile and the fast development of communication, it is more and more vigorous for the demand of DC-DC Switching Power Supplies.
At present DC-DC Switching Power Supplies small volume on the market, in light weight, stability is good, safety coefficient is high, sent out in photovoltaic
The fields such as electricity, electric automobile and communication have a good application prospect.
DC-DC Switching Power Supplies are broadly divided into two classes, and one kind is booster type, and another kind of is voltage-dropping type.Drop of the prior art
Die mould DC-DC Switching Power Supplies are depressured using single switch flyback topology more, this scheme shortcoming be to the resistance to pressure request of metal-oxide-semiconductor compared with
Height, and in high input voltage, switching loss is very big, greatly limit output power of power supply.It is horizontal based on existing electronic device, this
Scheme is difficult to meet input 1500VDC design requirements.
Utility model content
In view of the deficienciess of the prior art, to be to provide a kind of ultra-wide input two-way voltage-stabilizing defeated for the purpose of this utility model
Go out DC-DC Switching Power Supplies, it is when high voltage inputs with smaller switching loss.
To achieve the above object, the utility model provides following technical scheme：
A kind of ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies, including energy steering circuit, transformer and output electricity
Road, the energy steering circuit include resistance R1A, R1B, R1C, R1D, electric capacity C1A, C1B, C1C, C1D, the enhanced MOS of N-channel
FET Q1 and Q2, wherein, resistance R1A, resistance R1B, resistance R1C and resistance R1D are sequentially connected in series, and resistance R1A's is another
The positive voltage input of energy steering circuit is drawn at end, and the resistance R1D other end draws the negative voltage input of energy steering circuit
End, electric capacity C1A, electric capacity C1B, electric capacity C1C and electric capacity C1D are sequentially connected in series, electric capacity C1A other end connection energy hole electricity
The positive voltage input on road, the negative voltage input of electric capacity C1D other end connection energy steering circuit, resistance R1A and resistance
R1B tie point is connected with electric capacity C1A and electric capacity C1B tie point, resistance R1B and resistance R1C tie point and electric capacity C1B and
Electric capacity C1C tie point connection, resistance R1C and resistance R1D tie point are connected with electric capacity C1C and electric capacity C1D tie point, are become
The high-pressure side winding of depressor includes coil TRAN-A and coil TRAN-B, and the one of FET Q1 drain bond wires circle TRAN-A
End, Q1 source connection lines circle TRAN-B one end, Q1 grid connection control voltage, coil TRAN-A other end connection
The positive voltage input of energy steering circuit；The FET Q2 drain bond wires circle TRAN-B other end, Q2 source electrode connect
Connect the negative voltage input of energy steering circuit, Q2 grid connection control voltage.
Preferably：The low-pressure side winding of the transformer includes coil TRAN-C and coil TRAN-D, described defeated
Going out circuit includes main output loop and auxiliary output loop, and the main output loop is coupled to coil TRAN-C, and the auxiliary is defeated
Go out loop and be coupled to coil TRAN-D.
Preferably：The main output loop includes the first rectifying and wave-filtering electricity being made up of diode D1 and electric capacity C1
The anode connection coil TRAN-C on road, wherein diode D1 one end, D1 negative electrode draw the positive voltage output of main output loop
End, the coil TRAN-C other end draw the negative voltage output end of main output loop, and electric capacity C1 is being connected to main output loop just
Between voltage output end and negative voltage output end.
Preferably：The auxiliary output loop includes the second rectifying and wave-filtering being made up of diode D2 and electric capacity C2
The anode connection coil TRAN-D of circuit, wherein diode D2 one end, D2 negative electrode draw the positive voltage of auxiliary output loop
Output end, the coil TRAN-D other end draw the negative voltage output end of auxiliary output loop, and electric capacity C2 is connected to auxiliary output
Between the positive voltage output end and negative voltage output end in loop.
Preferably：The auxiliary output loop also includes feedback regulating circuit, and the feedback regulating circuit includes
Optocoupler, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C3, fiducial chip U1 and N-channel enhancement mode MOSFET
Auxiliary output loop is drawn in Q3, wherein FET Q3 source connection lines circle the TRAN-D described other end, Q3 drain electrode
Negative voltage output end, resistance R4 one end connection auxiliary output loop positive voltage output end and its other end connection Q3 grid
Pole, the positive voltage output end of resistance R1 one end connection auxiliary output loop, the anode of R1 other end connection optocoupler, optocoupler
Negative electrode connects U1 negative electrode, the negative voltage output end of U1 anode connection auxiliary output loop, and resistance R2 connects with resistance R3,
The positive voltage output end of resistance R2 other end connection auxiliary output loop, resistance R3 other end connection auxiliary output loop
Negative voltage output end, electric capacity C3 one end connection U1 negative electrode, the electric capacity C3 other end and resistance R2 and resistance R3 connection
Point connection, U1 reference pole are connected with resistance R2 and resistance R3 tie point, the emitter stage connection Q3 of optocoupler source electrode, optocoupler
Colelctor electrode connection Q3 grid.
Preferably：The model PC817 of the optocoupler.
Preferably：The model TL431 of the fiducial chip.
Compared with prior art, the utility model has the advantages that：The on-off circuit uses two switching tubes, two switching tubes
On switching voltage stress it is more much smaller than the stress of prior art single switching transistor, have more choosings in the type selecting of switching tube
Select, and the switching loss of two switching tubes, than enjoying the small of technology single switching transistor, heating similarly can be much smaller, in electricity
Source efficiency this part has also obtained certain raising, so as to improve power supply reliability.
Brief description of the drawings
Fig. 1 is the circuit diagram of the Switching Power Supply.
Embodiment
A kind of ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies.
Reference picture 1, the Switching Power Supply include energy steering circuit and transforming circuit, and wherein energy steering circuit includes resistance
The enhanced MOS fields of R1A, resistance R1B, resistance R1C, resistance R1D, electric capacity C1A, electric capacity C1B, electric capacity C1C, electric capacity C1D, N-channel
Effect pipe Q1 and N-channel enhancement mode MOSFET Q2.Wherein, resistance R1A, resistance R1B, resistance R1C and resistance
R1D is sequentially connected in series, and the resistance R1A other end is positive voltage input --- the i.e. positive voltage of Switching Power Supply of energy steering circuit
Input, the resistance R1D other end are the negative voltage input of energy steering circuit --- i.e. the negative voltage input of Switching Power Supply
End；Electric capacity C1A, electric capacity C1B, electric capacity C1C and electric capacity C1D are sequentially connected in series, electric capacity C1A other end connection energy steering circuit
Positive voltage input, electric capacity C1D the other end connection energy steering circuit negative voltage input.Resistance R1A and resistance R1B
Between connecting wire and electric capacity C1A and electric capacity C1B between connecting wire connection turn on, between resistance R1B and resistance R1C
Connecting wire connection conducting between connecting wire and electric capacity C1B and electric capacity C1C, the connection between resistance R1C and resistance R1D are led
Connecting wire connection conducting between line and electric capacity C1C and electric capacity C1D.
Transforming circuit uses transformer, and transformer T high-pressure side winding uses two-part structure design, respectively coil
TRAN-A and coil TRAN-B.FET Q1 drain bond wires circle TRAN-A one end, Q1 source connection lines circle TRAN-
B one end, Q1 grid connection control voltage, the positive voltage input of coil TRAN-A other end connection energy steering circuit
End；The FET Q2 drain bond wires circle TRAN-B other end, the negative voltage of Q2 source electrode connection energy steering circuit are defeated
Enter end, Q2 grid connection control voltage.
Input ceiling voltage is added on the electric capacity C1A, C1B, C1C, C1D for the input being in series for 1500VDC and filtered
Ripple, and resistance R1A, R1B, R1C, R1D are handled the electric capacity C1A, C1B, C1C of input, C1D progress pressure, purpose makes electric capacity
Voltage on C1A, C1B, C1C, C1D tends to identical, and transformer coil TRAN-A and TRAN-B carries out partial pressure to input voltage,
So that the voltage stress of switching tube Q1, Q2 when off leaves more margin.
Switching tube Q1, Q2 obtains drive signal conducting, while carries out energy storage for coil TRAN-A and coil TRAN-B, when
Switching tube Q1, Q2 obtain drive signal shut-off, the energy of coil TRAN-A and coil TRAN-B storages by coil TRAN-C with
TRAN-D carries out the power supply source output terminal load use that releases energy.
The low-pressure side winding of transformer is designed using double winding, including main winding TRAN-C and assists winding TRAN-D.Two
Pole pipe D1 anode connection coil TRAN-C one end, D1 negative electrode draw the positive voltage output end+Vo1 of main output loop, line
The other end for enclosing TRAN-C is the negative voltage output end-Vo1 of main output loop.Main output loop positive voltage output end with it is negative
Electric capacity C1 is connected between voltage output end.
Diode D2 anode connection assists winding TRAN-D one end, diode D2 negative electrode draw auxiliary output loop
Positive voltage output end+Vo2, the N-channel enhancement mode MOSFET Q3 source connection lines circle TRAN-D other end, Q3's
The negative voltage output end of auxiliary output loop is drawn in drain electrode, and Q3 grid aids in the positive voltage of output loop by resistance R4 connections
Output end.
Main output loop by coil TRAN-A and coil TRAN-B energy storage, coil TRAN-C release energy so as to
Backend load power supply uses.After auxiliary output loop is released energy by coil TRAN-D, then power and use to backend load.
Feedback control loop carries out sampling to main output loop so as to which controlling switch pipe Q1, Q2 open shut-off, because auxiliary output loop is logical
The coupling crossed between coil TRAN-D and main output loop coil TRAN-C now aids in output loop so as to carry out voltage stabilizing
Voltage pulsation it is larger, with main output loop with auxiliary output loop load change and change, so aid in output loop
It can pass through after being come out from coil TRAN-D under voltage stabilization of the linear stabilized power supply of switching tube Q3 formation auxiliary output loop
To supply electricity to backend load again.
Auxiliary output loop also includes feedback regulating circuit, and feedback regulating circuit includes Q3, optocoupler PC817, resistance R1, electricity
Hinder R2, resistance R3, resistance R4, electric capacity C3 and fiducial chip U1.Fiducial chip U1 model TL431.Wherein, resistance R1
The anode of the positive voltage output end+Vo2, R1 of one end connection auxiliary output loop other end connection optocoupler, the negative electrode of optocoupler connect
Meet fiducial chip U1 negative electrode, the negative voltage output end-Vo2, resistance R2 of fiducial chip U1 anode connection auxiliary output loop
Connected with resistance R3, the positive voltage output end+Vo2 of resistance R2 other end connection auxiliary output loop, the resistance R3 other end
Negative voltage output end-the Vo2, electric capacity C3 of connection auxiliary output loop one end connection fiducial chip U1 negative pole, electric capacity C3's
The other end is connected with resistance R2 and resistance R3 tie point, fiducial chip U1 reference pole and resistance R2 and resistance R3 tie point
Connection, the emitter stage connection Q3 of optocoupler source electrode, the colelctor electrode connection Q3 of optocoupler grid.
Backend load is supplied electricity to again, it is necessary to introduce mu balanced circuit handle in order to which coil TRAN-D output voltage stabilization is got off
Coil TRAN-D output voltage stabilization gets off.TL431 and optocoupler PC817 samples to bypass output loop voltage, so as to
Controlling switch pipe Q3's is turned on and off, and output voltage stabilization is got off.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (7)
1. a kind of ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies, including energy steering circuit, transformer and output electricity
Road, it is characterized in that：The energy steering circuit includes resistance R1A, R1B, R1C, R1D, electric capacity C1A, C1B, C1C, C1D, N ditches
Road enhancement mode MOSFET Q1 and Q2, wherein, resistance R1A, resistance R1B, resistance R1C and resistance R1D are sequentially connected in series, electricity
The other end for hindering R1A draws the positive voltage input of energy steering circuit, and the resistance R1D other end draws energy steering circuit
Negative voltage input, electric capacity C1A, electric capacity C1B, electric capacity C1C and electric capacity C1D are sequentially connected in series, electric capacity C1A other end connection energy
The positive voltage input of amount control circuit, the negative voltage input of electric capacity C1D other end connection energy steering circuit, resistance
R1A and resistance R1B tie point are connected with electric capacity C1A and electric capacity C1B tie point, resistance R1B and resistance R1C tie point with
Electric capacity C1B connects with electric capacity C1C tie point, resistance R1C and resistance R1D tie point and electric capacity C1C and electric capacity C1D connection
Point connection, the high-pressure side winding of transformer include coil TRAN-A and coil TRAN-B, FET Q1 drain bond wires circle
TRAN-A one end, Q1 source connection lines circle TRAN-B one end, Q1 grid connection control voltage, coil TRAN-A's is another
One end connects the positive voltage input of energy steering circuit；The FET Q2 drain bond wires circle TRAN-B other end, Q2
Source electrode connection energy steering circuit negative voltage input, Q2 grid connection control voltage.
2. ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies according to claim 1, it is characterized in that：The transformation
The low-pressure side winding of device includes coil TRAN-C and coil TRAN-D, and the output circuit includes main output loop and auxiliary exports
Loop, the main output loop are coupled to coil TRAN-C, and the auxiliary output loop is coupled to coil TRAN-D.
3. ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies according to claim 2, it is characterized in that：The master is defeated
Go out the first current rectifying and wave filtering circuit that loop includes being made up of diode D1 and electric capacity C1, wherein diode D1 anode connection coil
TRAN-C one end, D1 negative electrode draw the positive voltage output end of main output loop, and coil TRAN-C other end extraction master is defeated
Go out the negative voltage output end in loop, electric capacity C1 is connected between the positive voltage output end of main output loop and negative voltage output end.
4. ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies according to claim 2, it is characterized in that：The auxiliary
Output loop includes the second current rectifying and wave filtering circuit being made up of diode D2 and electric capacity C2, wherein diode D2 anode connecting line
TRAN-D one end is enclosed, D2 negative electrode draws the positive voltage output end of auxiliary output loop, and the coil TRAN-D other end is drawn
The negative voltage output end of output loop is aided in, electric capacity C2 is connected to the positive voltage output end of auxiliary output loop and negative voltage exports
Between end.
5. ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies according to claim 4, it is characterized in that：The auxiliary
Output loop also includes feedback regulating circuit, and the feedback regulating circuit includes optocoupler, resistance R1, resistance R2, resistance R3, resistance
R4, electric capacity C3, fiducial chip U1 and N-channel enhancement mode MOSFET Q3, wherein FET Q3 source connection lines circle
The negative voltage output end of auxiliary output loop, resistance R4 one end connection are drawn in the TRAN-D described other end, Q3 drain electrode
Aid in the positive voltage output end of output loop and its other end connection Q3 grid, resistance R1 one end connection auxiliary output loop
Positive voltage output end, R1 the other end connection optocoupler anode, optocoupler negative electrode connection U1 negative electrode, U1 anode connection it is auxiliary
The negative voltage output end of output loop is helped, resistance R2 connects with resistance R3, resistance R2 other end connection auxiliary output loop
Positive voltage output end, the negative voltage output end of resistance R3 other end connection auxiliary output loop, electric capacity C3 one end connection U1
Negative electrode, the electric capacity C3 other end is connected with resistance R2 and resistance R3 tie point, U1 reference pole and resistance R2 and resistance R3
Tie point connection, optocoupler emitter stage connection Q3 source electrode, optocoupler colelctor electrode connection Q3 grid.
6. ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies according to claim 5, it is characterized in that：The optocoupler
Model PC817.
7. ultra-wide input two-way voltage-stabilizing output DC-DC Switching Power Supplies according to claim 5, it is characterized in that：The benchmark
The model TL431 of chip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720646052.5U CN206908517U (en) | 2017-06-06 | 2017-06-06 | A kind of ultra-wide input two-way voltage-stabilizing output DC DC Switching Power Supplies |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720646052.5U CN206908517U (en) | 2017-06-06 | 2017-06-06 | A kind of ultra-wide input two-way voltage-stabilizing output DC DC Switching Power Supplies |
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