CN206461528U - The transforming circuit of AC-DC - Google Patents
The transforming circuit of AC-DC Download PDFInfo
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- CN206461528U CN206461528U CN201621493830.3U CN201621493830U CN206461528U CN 206461528 U CN206461528 U CN 206461528U CN 201621493830 U CN201621493830 U CN 201621493830U CN 206461528 U CN206461528 U CN 206461528U
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Abstract
The utility model is related to a kind of transforming circuit of AC-DC, including ac buck circuit, rectification circuit, filter circuit and one-level direct-current voltage reducing circuit；Decompression processing is carried out to AC power by ac buck circuit first, then DC voltage is obtained by rectification circuit, processing is filtered to the DC voltage and removes ripple so that the DC voltage is more stable, then the DC voltage that decompression processing is needed is carried out by one-level DC voltage circuit；The direct current transformation circuit, which need not use transformer, can just realize the conversion of stable AC-DC, and small volume, cost is low, practical.
Description
Technical field
The utility model is related to voltage transformation field, more particularly to a kind of transforming circuit of AC-DC.
Background technology
The power supply of many integrated circuits is all by carrying out civil power to obtain after voltage transformation.General, by civil power, i.e. 220V
Alternating voltage becomes DC low-voltage and needs to first pass through transformer to be depressured, and then passes through rectification, filtering, DC/DC decompressions again
Voltage is become to the DC voltage required for integrated circuit after processing of circuit.
But, in the small-power power supply occasion that some spatial volumes are narrow and small, such as some band IOT (Internet of
Things, Internet of Things) module 220V power supply units, there is problems with such as wifi intelligent lamps, traditional power supply mode：It is first
First, do not allow spatially (volume of transformer etc. is than larger)；Secondly, cost is higher.
Utility model content
Based on this, it is necessary to provide a kind of transforming circuit of the low AC-DC of small volume, cost.
A kind of transforming circuit of AC-DC, including：
Ac buck circuit, input connection AC power, is exported after being depressured to AC power；
Rectification circuit, connects the output end of the ac buck circuit, and the output voltage of the ac buck circuit is turned
It is changed to DC voltage；
Filter circuit, accesses the DC voltage, processing is filtered to the DC voltage；
One-level direct-current voltage reducing circuit, connects the output end of the filter circuit, and to the DC voltage after filtered processing
Exported after decompression processing.
The transforming circuit of above-mentioned AC-DC, carries out decompression processing by ac buck circuit to AC power first,
Then DC voltage is obtained by rectification circuit, processing is filtered to the DC voltage and removes ripple so that the DC voltage
It is more stable, then the DC voltage that decompression processing is needed is carried out by one-level DC voltage circuit；The direct current transformation circuit is not
The conversion of stable AC-DC can just be realized by needing to use transformer, and small volume, cost is low, practical.
In one of the embodiments, in addition to mu balanced circuit, the input of the mu balanced circuit connects the rectified current
The output end on road, output end connects the input of the filter circuit, for carrying out voltage stabilizing processing to the DC voltage.
In one of the embodiments, in addition to two grades of direct-current voltage reducing circuits, the one-level direct-current voltage reducing circuit is connected
Output end, is further depressured and voltage stabilizing processing for the output voltage to the one-level direct-current voltage reducing circuit.
In one of the embodiments, the one-level direct-current voltage reducing circuit is charge pump reduction voltage circuit.
In one of the embodiments, two grades of direct-current voltage reducing circuits are low voltage difference reduction voltage circuit.
In one of the embodiments, the ac buck circuit is RC reduction voltage circuits.
In one of the embodiments, the mu balanced circuit includes voltage-stabiliser tube, and the voltage stabilizing value of the voltage-stabiliser tube is 5V.
In one of the embodiments, the RC reduction voltage circuits include resistance R1 and electric capacity C1, one end of the resistance R1
Electric capacity C1 one end and one end of the AC power are connected respectively, and the other end connects the electric capacity C1 other end and rectified current respectively
One input on road, the capacitance of the electric capacity C1 is 0.33uF.
In one of the embodiments, the output voltage of the charge pump reduction voltage circuit is 3.3V.
In one of the embodiments, the output voltage of the low voltage difference reduction voltage circuit is 1.8V.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the transforming circuit of AC-DC in an embodiment；
Fig. 2 is the circuit structure diagram of the transforming circuit of AC-DC in another embodiment；
Fig. 3 is the circuit structure diagram of the transforming circuit of AC-DC in another embodiment；
Fig. 4 is the circuit diagram of the transforming circuit of AC-DC in an embodiment.
Embodiment
Referring to Fig. 1, Fig. 1 is the circuit structure diagram of the transforming circuit of AC-DC in an embodiment.
In the present embodiment, the transforming circuit of the AC-DC includes ac buck circuit 10, rectification circuit 11, filtering
Circuit 12 and one-level direct-current voltage reducing circuit 13.
The input of ac buck circuit 10 connects AC power, is exported after being depressured to AC power.One wherein
In embodiment, the AC power can be civil power, i.e. 220V alternating voltages.
In one of the embodiments, the ac buck circuit 10 is RC reduction voltage circuits.In a further embodiment, join
See Fig. 4, the one end of the RC reduction voltage circuits including resistance R1 and electric capacity C1, the resistance R1 connects electric capacity C1 one end and institute respectively
One end of AC power is stated, the other end connects the electric capacity C1 other end and an input of rectification circuit 11, the electric capacity respectively
C1 capacitance is 0.33uF.
Rectification circuit 11 connects the output end of the reduction voltage circuit 10, and the output voltage of the ac buck circuit is changed
For DC voltage.
In one of the embodiments, the rectification circuit 11 includes rectifier bridge and filter capacitor, and filter capacitor includes electric capacity
C2 and electric capacity C3, wherein, electric capacity C2 is electrochemical capacitor, and it is one defeated that electric capacity C2 positive pole and electric capacity C3 one end are all connected with rectifier bridge
Go out end, electric capacity C2 negative pole and the electric capacity C3 other end are all connected with another output end of rectifier bridge.It is by filtering that rectifier bridge is defeated
The voltage signal gone out carries out shaping and obtains DC voltage.
Filter circuit 12 accesses the DC voltage, and processing is filtered to the DC voltage.
In one of the embodiments, the filter circuit 12 includes filter capacitor C4, and electric capacity C4 one end connects electricity respectively
Hold C2 positive pole and electric capacity C3 one end, electric capacity C4 other end ground connection.The DC voltage exported to rectification circuit 11 enters to advance
The filtering process of one step, removes ripple, obtains galvanic current pressure.
One-level direct-current voltage reducing circuit 13 connects the output end of the filter circuit 12, and to the direct current after filtered processing
Pressure exported after decompression processing.
In one of the embodiments, the one-level direct-current voltage reducing circuit 13 can be charge pump reduction voltage circuit.Further
Embodiment in, referring to Fig. 4, the charge pump reduction voltage circuit includes voltage pump and is depressured chip U1, the model of the chip
TPS60501, voltage pump decompression chip U1 enable pin ground connection, input pin connection electric capacity C4 one end, i.e. filter circuit 12
Output end, voltage pump decompression chip U1 PG pins pass through resistance R2 connection electric capacity C3 one end, i.e. electric capacity C4 one end, filter
Access electric capacity C5, C1F- and C1F+ draw between the output end of wave circuit 12, voltage pump decompression chip U1 C2F- and C2F+ pins
It is grounded after accessing electric capacity C6, pin F8 and output pin short circuit between pin by electric capacity C7.The output of charge pump reduction voltage circuit is drawn
The voltage of pin is 3.3V.
Voltage pump decompression chip U1 model is not limited to TPS60501.
In one of the embodiments, referring to Fig. 2, the transforming circuit of the AC-DC also includes mu balanced circuit 14, institute
The input for stating mu balanced circuit 14 connects the output end of the rectification circuit 11, and output end connects the input of the filter circuit 12
End, for carrying out voltage stabilizing processing to the DC voltage.
In one of the embodiments, the mu balanced circuit 14 includes voltage-stabiliser tube, and the voltage stabilizing value of the voltage-stabiliser tube is 5V.This is steady
Pressure pipe is by the output voltage stabilization of rectification circuit in 5V, and after the mu balanced circuit, AC power becomes 5V DC voltage.Should
The maximum current that voltage-stabiliser tube can be born can not be less than the maximum current that rectification circuit is exported, all during in order to avoid circuit is unloaded
Electric current is all discharged by the voltage-stabiliser tube, causes voltage-stabiliser tube to burn.
In one of the embodiments, referring to Fig. 4, the voltage-stabiliser tube can select voltage-regulator diode ZD.
In one of the embodiments, referring to Fig. 3, the transforming circuit of the AC-DC also includes two grades of DC decompression electricity
Road 15, connects the output end of the one-level direct-current voltage reducing circuit 13, for the output voltage to the one-level direct-current voltage reducing circuit
Carry out further decompression and voltage stabilizing processing.
In one of the embodiments, two grades of direct-current voltage reducing circuits 15 are low voltage difference reduction voltage circuit.Further real
Apply in example, referring to Fig. 4, the low voltage difference reduction voltage circuit includes low voltage difference and is depressured chip U2, the model S-1206B18- of the chip
M3T1x, low voltage difference decompression chip U2 input pin connection voltage pump decompression chip U1 output pin, that is, access the straight of 3.3V
Voltage is flowed, is output after 1.8V by the DC voltage conversion.Low voltage difference decompression chip U2 input pin and output pin point
Processing is not filtered by filter capacitor C8 and electric capacity C9 so that the DC voltage of final output is more stable, and ripple is smaller.Should
Input voltage and the output voltage difference of low voltage difference reduction voltage circuit are smaller, have ensured the conversion efficiency of the circuit.
Low voltage difference decompression chip U2 model is not limited to S-1206B18-M3T1x.
AC power is depressured by the transforming circuit of above-mentioned AC-DC, ac buck circuit 10, then by after decompression
Alternating voltage carries out rectification, voltage stabilizing and filtering process, obtains galvanic current pressure, such as 5V, then pass through voltage pump reduction voltage circuit
Carry out the processing of one-level DC decompression and obtain the smaller DC voltage of amplitude, such as 3.3V, finally by two grades of direct-current voltage reducing circuits 15
Target voltage is obtained after further carrying out decompression processing, such as 1.8V DC voltages are finally fed integrated circuit, are used as integrated circuit
Power supply；The transforming circuit of the AC-DC can obtain galvanic current pressure, and output ripple is small, precision is high, and
Small volume, cost are low, practical.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of transforming circuit of AC-DC, it is characterised in that including：
Ac buck circuit, input connection AC power, is exported after being depressured to AC power；
Rectification circuit, connects the output end of the ac buck circuit, the output voltage of the ac buck circuit is converted to
DC voltage；
Filter circuit, accesses the DC voltage, processing is filtered to the DC voltage；
One-level direct-current voltage reducing circuit, connects the output end of the filter circuit, and the DC voltage after filtered processing is carried out
Exported after decompression processing.
2. the transforming circuit of AC-DC according to claim 1, it is characterised in that also including mu balanced circuit, described
The input of mu balanced circuit connects the output end of the rectification circuit, and output end connects the input of the filter circuit, is used for
Voltage stabilizing processing is carried out to the DC voltage.
3. the transforming circuit of AC-DC according to claim 1 or 2, it is characterised in that also including two grades of direct current drops
Volt circuit, connects the output end of the one-level direct-current voltage reducing circuit, for the output voltage to the one-level direct-current voltage reducing circuit
Carry out further decompression and voltage stabilizing processing.
4. the transforming circuit of AC-DC according to claim 1 or 2, it is characterised in that the one-level DC decompression
Circuit is charge pump reduction voltage circuit.
5. the transforming circuit of AC-DC according to claim 3, it is characterised in that two grades of direct-current voltage reducing circuits
For low voltage difference reduction voltage circuit.
6. the transforming circuit of AC-DC according to claim 1, it is characterised in that the ac buck circuit is RC
Reduction voltage circuit.
7. the transforming circuit of AC-DC according to claim 2, it is characterised in that the mu balanced circuit includes voltage stabilizing
Pipe, the voltage stabilizing value of the voltage-stabiliser tube is 5V.
8. the transforming circuit of AC-DC according to claim 6, it is characterised in that the RC reduction voltage circuits include electricity
Resistance R1 and electric capacity C1, the resistance R1 one end connect electric capacity C1 one end and one end of the AC power, the other end respectively
The electric capacity C1 other end and an input of rectification circuit are connected respectively, and the capacitance of the electric capacity C1 is 0.33uF.
9. the transforming circuit of AC-DC according to claim 4, it is characterised in that the charge pump reduction voltage circuit
Output voltage is 3.3V.
10. the transforming circuit of AC-DC according to claim 5, it is characterised in that the low voltage difference reduction voltage circuit
Output voltage be 1.8V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621493830.3U CN206461528U (en) | 2016-12-31 | 2016-12-31 | The transforming circuit of AC-DC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621493830.3U CN206461528U (en) | 2016-12-31 | 2016-12-31 | The transforming circuit of AC-DC |
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| Publication Number | Publication Date |
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| CN206461528U true CN206461528U (en) | 2017-09-01 |
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| CN201621493830.3U Active CN206461528U (en) | 2016-12-31 | 2016-12-31 | The transforming circuit of AC-DC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787835A (en) * | 2016-12-31 | 2017-05-31 | 深圳市江波龙电子有限公司 | The transforming circuit of AC-DC |
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2016
- 2016-12-31 CN CN201621493830.3U patent/CN206461528U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787835A (en) * | 2016-12-31 | 2017-05-31 | 深圳市江波龙电子有限公司 | The transforming circuit of AC-DC |
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Address after: 518057 A, B, C, D, E, F1, 8 Building, Financial Services Technology Innovation Base, No. 8 Kefa Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen jiangbolong electronic Limited by Share Ltd Address before: 518057 A, B, C, D, E, F1, 8 Building, Financial Services Technology Innovation Base, No. 8 Kefa Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen jiangbolong Electronic Co., Ltd. |
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