CN204334355U - A kind of wide input isolated form three road output switch power source - Google Patents
A kind of wide input isolated form three road output switch power source Download PDFInfo
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- CN204334355U CN204334355U CN201420858647.3U CN201420858647U CN204334355U CN 204334355 U CN204334355 U CN 204334355U CN 201420858647 U CN201420858647 U CN 201420858647U CN 204334355 U CN204334355 U CN 204334355U
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Abstract
The utility model discloses a kind of wide input isolated form three road output switch power source, comprise current rectifying and wave filtering circuit, heterogeneous transforming circuit and voltage stabilizing feedback circuit, described current rectifying and wave filtering circuit comprises electric capacity C1 and rectifier bridge T, described heterogeneous transforming circuit comprises high frequency transformer W, diode D7 and electric capacity C8, and described voltage stabilizing feedback circuit comprises chip IC 2, unidirectional thyristor RT1 and resistance R7.The utility model circuit uses the form of metal-oxide-semiconductor and the series connection of TOP242 switch chip to carry out voltage stabilizing, substantially increase the withstand voltage of circuit, and decrease switching loss, the voltage that output arranges the different value in three tunnels exports, change output voltage values by the number of turn changing corresponding transformer coil, the Switching Power Supply using this circuit to make has the advantage that input range is wide, withstand voltage is high, loss is low and output voltage is various.
Description
Technical field
The utility model relates to a kind of switching circuit, the wide input isolated form three road output switch power source of specifically simple, the stable performance of a kind of structure.
Background technology
Alternating current is the energy the most frequently used in daily life, Switching Power Supply is widely used based on self compact and the high feature of conversion efficiency as the switching device of alternating current in electronic product, traditional Switching Power Supply can only limit a kind of input voltage, but the voltage of electrical network is often benefited from the change of electric loading and changes, when particularly load is larger, situation is especially serious, the interference spike of site environment also can be superimposed upon on input voltage and enter power circuit together in addition, the power supply chip of normal power supply in the presence of a harsh environment or other element is caused extremely easily to damage, and a lot of components and parts need different voltage driven in use, therefore, the Switching Power Supply of single-wide is difficult to satisfied present user demand, very large inconvenience is brought to user.
Utility model content
The purpose of this utility model is to provide that a kind of structure is simple, the wide input isolated form three road output switch power source of stable performance, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of wide input isolated form three road output switch power source, comprise current rectifying and wave filtering circuit, heterogeneous transforming circuit and voltage stabilizing feedback circuit, described current rectifying and wave filtering circuit comprises electric capacity C1 and rectifier bridge T, described heterogeneous transforming circuit comprises high frequency transformer W, diode D7 and electric capacity C8, and described voltage stabilizing feedback circuit comprises chip IC 2, unidirectional thyristor RT1 and resistance R7;
One end contact resistance R1 of described electric capacity C1 and alternating current AC, the other end of electric capacity C1 connects the other end of alternating current AC and 3 ports of rectifier bridge T, the other end of the 1 port contact resistance R1 of rectifier bridge T, the 2 port contact resistance R2 of rectifier bridge T, resistance R3, the positive pole of diode D4, the coil L1 of trimming capacitor C P1 and high frequency transformer W, 4 ports of rectifier bridge T connect the positive pole of diode D1, the negative pole contact resistance R6 of diode D1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, the positive pole of diode D2 and 4 pins of chip IC 1, the other end of the other end contact resistance R2 of trimming capacitor C P1, the other end of resistance R6 and the other end of electric capacity C2, the other end contact resistance R4 of resistance R3, the other end contact resistance R5 of resistance R4, the negative pole of diode D3 and the grid of metal-oxide-semiconductor Q, the other end of resistance R5 connects the negative pole of diode D2, the positive pole of diode D3 connects the source electrode of metal-oxide-semiconductor Q and 2 pins of chip IC 1, 3 pins of chip IC 1 connect the other end of electric capacity C3, 5 pins of chip IC 1 connect the other end of electric capacity C4, 6 pins of chip IC 1 connect the other end of electric capacity C6, resistance R7, the sliding end of potentiometer RP2 and a stiff end of potentiometer RP2, another stiff end of potentiometer RP2 connects the other end of electric capacity C5, the drain electrode of metal-oxide-semiconductor Q connects the other end of the positive pole of diode D5 and the coil L1 of high frequency transformer W, the negative pole of diode D5 connects the negative pole of diode D4, one end of the coil L2 of high frequency transformer W connects the positive pole of diode D6, the negative pole of diode D6 connects 1 pin of chip IC 2, the other end ground connection of the coil L2 of high frequency transformer W, the other end of 2 pin contact resistance R7 of chip IC 2, one end of the coil L3 of high frequency transformer W connects the positive pole of diode D7, the negative pole of diode D7 connects electric capacity C8, electric capacity C9 and inductance L 6, the other end of inductance L 6 connects electric capacity C12 and electric capacity C13 and output voltage U1, the other end of the coil L3 of high frequency transformer W connects the other end of electric capacity C8, the other end of electric capacity C9, the other end of electric capacity C12, the other end of electric capacity C13 and the other end of output voltage U1, one end of the coil L4 of high frequency transformer W connects the positive pole of diode D8, the negative pole of diode D8 connects electric capacity C10, electric capacity C11 and inductance L 7, the other end of inductance L 7 connects electric capacity C14, electric capacity C15 and output voltage U2, the other end of the coil L4 of high frequency transformer W connects the other end of electric capacity C10, the other end of electric capacity C11, the other end of electric capacity C14, the other end of electric capacity C15 and the other end of output voltage U1, one end of the coil L5 of high frequency transformer W connects the positive pole of diode D9, the negative pole of diode D9 connects electric capacity C16, the stiff end of potentiometer RP1, the sliding end of potentiometer RP1 and inductance L 8, the other end contact resistance R10 of inductance L 8, electric capacity C17 and electric capacity C18 output voltage U3, the other end of the coil L3 of high frequency transformer W connects the other end of electric capacity C16, the other end of electric capacity C17, the other end of electric capacity C15 and the other end of output voltage U1, another stiff end contact resistance R8 of potentiometer RP1 and 3 pins of chip IC 2, the other end contact resistance R9 of resistance R8, the negative electrode of unidirectional thyristor RT1 and 4 pins of chip IC 2, the anode contact resistance R11 of unidirectional thyristor RT1 and the other end of electric capacity C7 ground connection, the other end of the control pole contact resistance R9 of unidirectional thyristor RT1, the other end of resistance R10 and the other end of resistance R11.
As preferred version of the present utility model: described chip IC 1 is TOP242R type open switch chip, and chip IC 2 is 4N25 optical coupler.
As preferred version of the present utility model: the scope of described alternating current AC is 50 ~ 450V.
Compared with prior art, the beneficial effects of the utility model are: circuit uses the form of metal-oxide-semiconductor and the series connection of TOP242 switch chip to carry out voltage stabilizing, substantially increase the withstand voltage of circuit, and decrease switching loss, the voltage that output arranges the different value in three tunnels exports, change output voltage values by the number of turn changing corresponding transformer coil, the Switching Power Supply using this circuit to make has the advantage that input range is wide, withstand voltage is high, loss is low and output voltage is various.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of wide input isolated form three road output switch power source.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.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.
Refer to Fig. 1, a kind of wide input isolated form three road output switch power source, comprise current rectifying and wave filtering circuit, heterogeneous transforming circuit and voltage stabilizing feedback circuit, described current rectifying and wave filtering circuit comprises electric capacity C1 and rectifier bridge T, described heterogeneous transforming circuit comprises high frequency transformer W, diode D7 and electric capacity C8, and described voltage stabilizing feedback circuit comprises chip IC 2, unidirectional thyristor RT1 and resistance R7;
One end contact resistance R1 of described electric capacity C1 and alternating current AC, the other end of electric capacity C1 connects the other end of alternating current AC and 3 ports of rectifier bridge T, the other end of the 1 port contact resistance R1 of rectifier bridge T, the 2 port contact resistance R2 of rectifier bridge T, resistance R3, the positive pole of diode D4, the coil L1 of trimming capacitor C P1 and high frequency transformer W, 4 ports of rectifier bridge T connect the positive pole of diode D1, the negative pole contact resistance R6 of diode D1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, the positive pole of diode D2 and 4 pins of chip IC 1, the other end of the other end contact resistance R2 of trimming capacitor C P1, the other end of resistance R6 and the other end of electric capacity C2, the other end contact resistance R4 of resistance R3, the other end contact resistance R5 of resistance R4, the negative pole of diode D3 and the grid of metal-oxide-semiconductor Q, the other end of resistance R5 connects the negative pole of diode D2, the positive pole of diode D3 connects the source electrode of metal-oxide-semiconductor Q and 2 pins of chip IC 1, 3 pins of chip IC 1 connect the other end of electric capacity C3, 5 pins of chip IC 1 connect the other end of electric capacity C4, 6 pins of chip IC 1 connect the other end of electric capacity C6, resistance R7, the sliding end of potentiometer RP2 and a stiff end of potentiometer RP2, another stiff end of potentiometer RP2 connects the other end of electric capacity C5, the drain electrode of metal-oxide-semiconductor Q connects the other end of the positive pole of diode D5 and the coil L1 of high frequency transformer W, the negative pole of diode D5 connects the negative pole of diode D4, one end of the coil L2 of high frequency transformer W connects the positive pole of diode D6, the negative pole of diode D6 connects 1 pin of chip IC 2, the other end ground connection of the coil L2 of high frequency transformer W, the other end of 2 pin contact resistance R7 of chip IC 2, one end of the coil L3 of high frequency transformer W connects the positive pole of diode D7, the negative pole of diode D7 connects electric capacity C8, electric capacity C9 and inductance L 6, the other end of inductance L 6 connects electric capacity C12 and electric capacity C13 and output voltage U1, the other end of the coil L3 of high frequency transformer W connects the other end of electric capacity C8, the other end of electric capacity C9, the other end of electric capacity C12, the other end of electric capacity C13 and the other end of output voltage U1, one end of the coil L4 of high frequency transformer W connects the positive pole of diode D8, the negative pole of diode D8 connects electric capacity C10, electric capacity C11 and inductance L 7, the other end of inductance L 7 connects electric capacity C14, electric capacity C15 and output voltage U2, the other end of the coil L4 of high frequency transformer W connects the other end of electric capacity C10, the other end of electric capacity C11, the other end of electric capacity C14, the other end of electric capacity C15 and the other end of output voltage U1, one end of the coil L5 of high frequency transformer W connects the positive pole of diode D9, the negative pole of diode D9 connects electric capacity C16, the stiff end of potentiometer RP1, the sliding end of potentiometer RP1 and inductance L 8, the other end contact resistance R10 of inductance L 8, electric capacity C17 and electric capacity C18 output voltage U3, the other end of the coil L3 of high frequency transformer W connects the other end of electric capacity C16, the other end of electric capacity C17, the other end of electric capacity C15 and the other end of output voltage U1, another stiff end contact resistance R8 of potentiometer RP1 and 3 pins of chip IC 2, the other end contact resistance R9 of resistance R8, the negative electrode of unidirectional thyristor RT1 and 4 pins of chip IC 2, the anode contact resistance R11 of unidirectional thyristor RT1 and the other end of electric capacity C7 ground connection, the other end of the control pole contact resistance R9 of unidirectional thyristor RT1, the other end of resistance R10 and the other end of resistance R11.
Chip IC 1 is TOP242R type open switch chip, and chip IC 2 is 4N25 optical coupler.
The scope of alternating current AC is 50 ~ 450V.
Operation principle of the present utility model is: 50 ~ 450V alternating voltage input circuit, galvanic current is become after the rectifying and wave-filtering of rectifier bridge T and electric capacity C1, voltage input metal-oxide-semiconductor Q circuit uses the form allowing metal-oxide-semiconductor Q be connected in series with TOP242R chip, and it is withstand voltage to realize improving entirety with TOP pipe synchro switch, and make the conducting turn-off time be tens nanoseconds, greatly reduce switching loss.The break-make of metal-oxide-semiconductor is controlled by TOP242R, the switching tube sequential of metal-oxide-semiconductor and TOP242R inside can be made like this to be consistent, the voltage stabilizing feedback circuit of output voltage through being made up of optical coupler IC2 and peripheral components thereof, the variation of output voltage controls within ± 1% by optical coupler IC2, and feedback voltage is sampled by 5V output.Voltage feedback signal is by obtaining sampling voltage after R10 and R11 dividing potential drop, and compare and output error voltage with the reference voltage in TL431, then the control end electric current of TOP242R is changed by optocoupler, carrying out regulation output voltage by change duty ratio again makes it remain unchanged, reach the object of voltage stabilizing feedback, voltage in circuit carries out voltage transformation by the multi-pole coils L1 ~ L5 of transformer W, exports the output voltage of not volume value, and this circuit design is that three tunnels export U1 ~ U3.
Claims (3)
1. a wide input isolated form three road output switch power source, comprises current rectifying and wave filtering circuit, heterogeneous transforming circuit and voltage stabilizing feedback circuit, it is characterized in that, described current rectifying and wave filtering circuit comprises electric capacity C1 and rectifier bridge T, and described heterogeneous transforming circuit comprises high frequency transformer W, diode D7 and electric capacity C8, and described voltage stabilizing feedback circuit comprises chip IC 2, unidirectional thyristor RT1 and resistance R7, one end contact resistance R1 of described electric capacity C1 and alternating current AC, the other end of electric capacity C1 connects the other end of alternating current AC and 3 ports of rectifier bridge T, the other end of the 1 port contact resistance R1 of rectifier bridge T, the 2 port contact resistance R2 of rectifier bridge T, resistance R3, the positive pole of diode D4, the coil L1 of trimming capacitor C P1 and high frequency transformer W, 4 ports of rectifier bridge T connect the positive pole of diode D1, the negative pole contact resistance R6 of diode D1, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, the positive pole of diode D2 and 4 pins of chip IC 1, the other end of the other end contact resistance R2 of trimming capacitor C P1, the other end of resistance R6 and the other end of electric capacity C2, the other end contact resistance R4 of resistance R3, the other end contact resistance R5 of resistance R4, the negative pole of diode D3 and the grid of metal-oxide-semiconductor Q, the other end of resistance R5 connects the negative pole of diode D2, the positive pole of diode D3 connects the source electrode of metal-oxide-semiconductor Q and 2 pins of chip IC 1, 3 pins of chip IC 1 connect the other end of electric capacity C3, 5 pins of chip IC 1 connect the other end of electric capacity C4, 6 pins of chip IC 1 connect the other end of electric capacity C6, resistance R7, the sliding end of potentiometer RP2 and a stiff end of potentiometer RP2, another stiff end of potentiometer RP2 connects the other end of electric capacity C5, the drain electrode of metal-oxide-semiconductor Q connects the other end of the positive pole of diode D5 and the coil L1 of high frequency transformer W, the negative pole of diode D5 connects the negative pole of diode D4, one end of the coil L2 of high frequency transformer W connects the positive pole of diode D6, the negative pole of diode D6 connects 1 pin of chip IC 2, the other end ground connection of the coil L2 of high frequency transformer W, the other end of 2 pin contact resistance R7 of chip IC 2, one end of the coil L3 of high frequency transformer W connects the positive pole of diode D7, the negative pole of diode D7 connects electric capacity C8, electric capacity C9 and inductance L 6, the other end of inductance L 6 connects electric capacity C12 and electric capacity C13 and output voltage U1, the other end of the coil L3 of high frequency transformer W connects the other end of electric capacity C8, the other end of electric capacity C9, the other end of electric capacity C12, the other end of electric capacity C13 and the other end of output voltage U1, one end of the coil L4 of high frequency transformer W connects the positive pole of diode D8, the negative pole of diode D8 connects electric capacity C10, electric capacity C11 and inductance L 7, the other end of inductance L 7 connects electric capacity C14, electric capacity C15 and output voltage U2, the other end of the coil L4 of high frequency transformer W connects the other end of electric capacity C10, the other end of electric capacity C11, the other end of electric capacity C14, the other end of electric capacity C15 and the other end of output voltage U1, one end of the coil L5 of high frequency transformer W connects the positive pole of diode D9, the negative pole of diode D9 connects electric capacity C16, the stiff end of potentiometer RP1, the sliding end of potentiometer RP1 and inductance L 8, the other end contact resistance R10 of inductance L 8, electric capacity C17 and electric capacity C18 output voltage U3, the other end of the coil L3 of high frequency transformer W connects the other end of electric capacity C16, the other end of electric capacity C17, the other end of electric capacity C15 and the other end of output voltage U1, another stiff end contact resistance R8 of potentiometer RP1 and 3 pins of chip IC 2, the other end contact resistance R9 of resistance R8, the negative electrode of unidirectional thyristor RT1 and 4 pins of chip IC 2, the anode contact resistance R11 of unidirectional thyristor RT1 and the other end of electric capacity C7 ground connection, the other end of the control pole contact resistance R9 of unidirectional thyristor RT1, the other end of resistance R10 and the other end of resistance R11.
2. one according to claim 1 wide input isolated form three road output switch power source, is characterized in that, described chip IC 1 is TOP242R type open switch chip, and chip IC 2 is 4N25 optical coupler.
3. one according to claim 1 wide input isolated form three road output switch power source, is characterized in that, the scope of described alternating current AC is 50 ~ 450V.
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| CN201420858647.3U CN204334355U (en) | 2014-12-30 | 2014-12-30 | A kind of wide input isolated form three road output switch power source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600425A (en) * | 2020-12-02 | 2021-04-02 | 南京民联仪器制造有限公司 | Low-current controllable rectifier working in ultralow-frequency dielectric loss measuring device and rectification control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600425A (en) * | 2020-12-02 | 2021-04-02 | 南京民联仪器制造有限公司 | Low-current controllable rectifier working in ultralow-frequency dielectric loss measuring device and rectification control method thereof |
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Address after: 201512 Building 1, no.469 sanbang Road, Songjiang District, Shanghai Patentee after: Shanghai Juntao Technology Co.,Ltd. Address before: 201512 Building 1, no.469 sanbang Road, Songjiang District, Shanghai Patentee before: SHANGHAI JUNTAO POWER EQUIPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |