CN112187036A - Voltage-stabilizing output power supply circuit for sound equipment - Google Patents
Voltage-stabilizing output power supply circuit for sound equipment Download PDFInfo
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- CN112187036A CN112187036A CN202011039066.3A CN202011039066A CN112187036A CN 112187036 A CN112187036 A CN 112187036A CN 202011039066 A CN202011039066 A CN 202011039066A CN 112187036 A CN112187036 A CN 112187036A
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- power supply
- supply circuit
- resistor
- output
- output power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a voltage-stabilizing output power supply circuit of sound equipment, which is characterized by comprising the following components: the input end of the first EMI filtering module is connected with the L line and the N line, and the output end of the second EMI filtering module is connected with the output end of the circuit. The input side and the output side of the circuit are respectively provided with the common mode inductor to realize degaussing and filtering, and the output side is also provided with the peak clipping circuit, so that the stability of an electric signal in the processes of rectification, transformation and output is ensured, a wider current output range is provided, the power supply requirement of sound equipment is met, and the circuit has the advantages of simple structure, easiness in implementation, stable performance, better technical performance, economical efficiency and practicability, and suitability for popularization and application.
Description
Technical Field
The invention is applied to sound equipment, and particularly relates to a voltage-stabilizing output power supply circuit of the sound equipment.
Background
Acoustic equipment has a high demand for sound quality output, and therefore, a power supply circuit having stable electrical output and little or no noise is required for support. The power supply circuit of the existing sound equipment mostly adopts a switch type power supply, and because the voltage fluctuation of an output end or the insufficient current driving force, the stability of subsequent electric output is influenced, and the situations of sound breaking and the like are caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a voltage-stabilizing output power supply circuit of sound equipment, which realizes the electric output in the range of voltage stabilization and wide current, and has the following specific technical contents:
a sound equipment voltage stabilization output power supply circuit includes: the input end of the first EMI filtering module is connected with the L line and the N line, and the output end of the second EMI filtering module is connected with the output end of the circuit.
In one or more embodiments of the present invention, the first EMI filter module includes a common-mode inductor L1 and a filter capacitor CX1 connected between two input terminals of the common-mode inductor L1.
In one or more embodiments of the present invention, the rectifier and filter module includes a rectifier bridge DB1 and an electrolytic capacitor CE2 connected between two output terminals of the rectifier bridge DB 1.
In one or more embodiments of the present invention, the switching transformation module includes a transformer T1 and a switching driving chip U1, and the transformer T1 has a transformer core including a first primary winding, a second primary winding, and a first secondary winding;
one end of the first primary coil is connected with the output end of the rectifying and filtering module, the other end of the first primary coil is connected with the control output end of the switch driving chip U1, a capacitor C1, a resistor R6 and a diode D1 are connected between the two ends of the first primary coil in series, and two ends of the capacitor C1 are respectively connected with a resistor R4 and a resistor R5 in parallel; the second primary coil is grounded through voltage dividing resistors R10 and R13, and a connecting point of the voltage dividing resistors R10 and R13 is connected with a feedback end of a switch driving chip U1; the first secondary side coil is connected with the input end of the output module;
the power supply end of the switch driving chip U1 is connected to the output end of the rectifying and filtering module through the starting resistors R7 and R8, and the power supply end is provided with a capacitor C2 and an electrolytic capacitor CE 3; the second primary winding is connected to the supply terminal via a diode D2 and a resistor R9.
In one or more embodiments of the present invention, the output module includes a freewheeling diode D3, a resistor R16, and a capacitor C3; the anode of the freewheeling diode D3 is connected to the high potential end of the first secondary winding of the transformer T1, and the resistor R16 is connected in series with the capacitor C3 and then connected to the two ends of the freewheeling diode D3.
In one or more embodiments of the present invention, the second EMI wave module includes a common mode inductor L2, a resistor R3, and an electrolytic capacitor CE4, and the electrolytic capacitor CE4 and the resistor R3 are connected in parallel between two input terminals of the common mode inductor L2.
In one or more embodiments of the present invention, a lightning protection module is disposed at an input end of the first EMI filter module.
In one or more embodiments of the invention, the lightning protection module includes resistors R1 and R2 connected in series between the L line and the N line, and a varistor MOV1 connected in parallel with R1 and R2.
In one or more embodiments of the present invention, a fuse unit F1 is disposed at an input end of the lightning protection module connected to the L line.
The invention has the beneficial effects that: the input side and the output side of the circuit are respectively provided with a common mode inductor to realize degaussing and filtering, and the output side is also provided with a peak clipping circuit, so that the stability of electric signals in the processes of rectification, transformation and output is ensured, a relatively wide current output range is possessed, the power supply requirement of sound equipment is met, the circuit is simple in structure, easy to implement and stable in performance, has better technical performance, economical efficiency and practicability, and is suitable for popularization and application.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The scheme of the present application is further described below with reference to fig. 1:
a sound equipment voltage stabilization output power supply circuit includes: the lightning protection module, the first EMI filtering module, the rectification filtering module, the switch voltage transformation module, the output module and the second EMI filtering module are connected in sequence, the input end of the first EMI filtering module is connected with the L line and the N line, and the output end of the second EMI filtering module is connected with the output end of the circuit. The first EMI filter module includes a common-mode inductor L1 and a filter capacitor CX1 connected between two input terminals of the common-mode inductor L1. The rectifying and filtering module comprises a rectifying bridge DB1 and an electrolytic capacitor CE2 connected between two output ends of the rectifying bridge DB 1. The switch transformation module comprises a transformer T1 and a switch driving chip U1, and the switch driving chip can adopt a PT2313H six-level energy efficiency high-performance PWM conversion chip of Hualunsiwei technology (Shanghai) limited; the transformer T1 comprises a first primary coil, a second primary coil and a first secondary coil; one end of the first primary coil is connected with the output end of the rectification filter module, the other end of the first primary coil is connected with the control output end (the 8 th pin) of the switch driving chip U1, a capacitor C1, a resistor R6 and a diode D1 are connected between the two ends of the first primary coil in series, and two ends of the capacitor C1 are respectively connected with a resistor R4 and a resistor R5 in parallel; the second primary coil is grounded through voltage dividing resistors R10 and R13, and a connection point of the voltage dividing resistors R10 and R13 is connected with a feedback end (pin 3) of a switch driving chip U1; the first secondary side coil is connected with the input end of the output module; a power supply end (a 1 st pin) of the switch driving chip U1 is connected to the output end of the rectifying and filtering module through a starting resistor R7 and a starting resistor R8, and a capacitor C2 and an electrolytic capacitor CE3 are arranged at the power supply end; the second primary winding is connected to the supply terminal via a diode D2 and a resistor R9. The output module comprises a freewheeling diode D3, a resistor R16 and a capacitor C3; the anode of the freewheeling diode D3 is connected with the high potential end of the first secondary winding of the transformer T1, the resistor R16 is connected with the capacitor C3 in series and then connected with the two ends of the freewheeling diode D3, and the resistor R16 and the capacitor C3 form a peak clipping circuit. The second EMI wave module comprises a common-mode inductor L2, a resistor R3 and an electrolytic capacitor CE4, wherein the electrolytic capacitor CE4 and the resistor R3 are arranged between two input ends of the common-mode inductor L2 in parallel. The lightning protection module comprises resistors R1 and R2 connected in series between the L line and the N line, and a piezoresistor MOV1 connected in parallel with the R1 and the R2. And the input end of the lightning protection module connected with the L line is provided with a safety unit F1.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (9)
1. A sound equipment voltage stabilization output power supply circuit is characterized by comprising: the input end of the first EMI filtering module is connected with the L line and the N line, and the output end of the second EMI filtering module is connected with the output end of the circuit.
2. The audio equipment voltage-stabilizing output power supply circuit according to claim 1, characterized in that: the first EMI filter module includes a common-mode inductor L1 and a filter capacitor CX1 connected between two input terminals of the common-mode inductor L1.
3. The audio equipment voltage-stabilizing output power supply circuit according to claim 1, characterized in that: the rectifying and filtering module comprises a rectifying bridge DB1 and an electrolytic capacitor CE2 connected between two output ends of the rectifying bridge DB 1.
4. The audio equipment voltage-stabilizing output power supply circuit according to claim 1, characterized in that: the switch transformation module comprises a transformer T1 and a switch driving chip U1, wherein the transformer T1 comprises a first primary coil, a second primary coil and a first secondary coil;
one end of the first primary coil is connected with the output end of the rectifying and filtering module, the other end of the first primary coil is connected with the control output end of the switch driving chip U1, a capacitor C1, a resistor R6 and a diode D1 are connected between the two ends of the first primary coil in series, and two ends of the capacitor C1 are respectively connected with a resistor R4 and a resistor R5 in parallel; the second primary coil is grounded through voltage dividing resistors R10 and R13, and a connecting point of the voltage dividing resistors R10 and R13 is connected with a feedback end of a switch driving chip U1; the first secondary side coil is connected with the input end of the output module;
the power supply end of the switch driving chip U1 is connected to the output end of the rectifying and filtering module through the starting resistors R7 and R8, and the power supply end is provided with a capacitor C2 and an electrolytic capacitor CE 3; the second primary winding is connected to the supply terminal via a diode D2 and a resistor R9.
5. The audio equipment voltage-stabilizing output power supply circuit according to claim 1, characterized in that: the output module comprises a freewheeling diode D3, a resistor R16 and a capacitor C3; the anode of the freewheeling diode D3 is connected to the high potential end of the first secondary winding of the transformer T1, and the resistor R16 is connected in series with the capacitor C3 and then connected to the two ends of the freewheeling diode D3.
6. The audio equipment voltage-stabilizing output power supply circuit according to claim 1, characterized in that: the second EMI wave module comprises a common-mode inductor L2, a resistor R3 and an electrolytic capacitor CE4, wherein the electrolytic capacitor CE4 and the resistor R3 are arranged between two input ends of the common-mode inductor L2 in parallel.
7. The audio equipment voltage-stabilizing output power supply circuit according to any one of claims 1 to 6, characterized in that: and the input end of the first EMI filtering module is provided with a lightning protection module.
8. The audio equipment voltage-stabilizing output power supply circuit according to claim 7, characterized in that: the lightning protection module comprises resistors R1 and R2 connected in series between the L line and the N line, and a piezoresistor MOV1 connected in parallel with the R1 and the R2.
9. The audio equipment voltage-stabilizing output power supply circuit according to claim 8, characterized in that: and the input end of the lightning protection module connected with the L line is provided with a safety unit F1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039066.3A CN112187036A (en) | 2020-09-28 | 2020-09-28 | Voltage-stabilizing output power supply circuit for sound equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039066.3A CN112187036A (en) | 2020-09-28 | 2020-09-28 | Voltage-stabilizing output power supply circuit for sound equipment |
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| CN112187036A true CN112187036A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011039066.3A Pending CN112187036A (en) | 2020-09-28 | 2020-09-28 | Voltage-stabilizing output power supply circuit for sound equipment |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000350445A (en) * | 1999-06-04 | 2000-12-15 | Seiko Epson Corp | Switching power source unit |
| US20030031035A1 (en) * | 2001-08-06 | 2003-02-13 | Saburou Kitano | Switching power unit |
| CN202444418U (en) * | 2012-02-27 | 2012-09-19 | 佛山市顺德区扬威电器有限公司 | Preventing electromagnetic interference (EMI) adaptor |
| CN203167379U (en) * | 2013-04-03 | 2013-08-28 | 深圳斯派克节能服务有限公司 | An isolated driving power supply of a LED fluorescent lamp |
| CN204887411U (en) * | 2015-09-16 | 2015-12-16 | 深圳市暗能量电源有限公司 | Intelligence audio frequency drive circuit |
| CN208272843U (en) * | 2018-06-29 | 2018-12-21 | 珠海尼克森电子科技有限公司 | A kind of charger constant voltage constant current power |
-
2020
- 2020-09-28 CN CN202011039066.3A patent/CN112187036A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000350445A (en) * | 1999-06-04 | 2000-12-15 | Seiko Epson Corp | Switching power source unit |
| US20030031035A1 (en) * | 2001-08-06 | 2003-02-13 | Saburou Kitano | Switching power unit |
| CN202444418U (en) * | 2012-02-27 | 2012-09-19 | 佛山市顺德区扬威电器有限公司 | Preventing electromagnetic interference (EMI) adaptor |
| CN203167379U (en) * | 2013-04-03 | 2013-08-28 | 深圳斯派克节能服务有限公司 | An isolated driving power supply of a LED fluorescent lamp |
| CN204887411U (en) * | 2015-09-16 | 2015-12-16 | 深圳市暗能量电源有限公司 | Intelligence audio frequency drive circuit |
| CN208272843U (en) * | 2018-06-29 | 2018-12-21 | 珠海尼克森电子科技有限公司 | A kind of charger constant voltage constant current power |
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| PB01 | Publication | ||
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Address after: 518000 No. 1 and No. 3, Tongfu Road, Pingdong community, Pingdi street, Longgang District, Shenzhen, Guangdong Applicant after: SHENZHEN DARK ENERGY POWER SUPPLY Co.,Ltd. Address before: 518000 buildings a and D, Dahua Industrial Zone, No.8 Jixiang Road, Pingdi street, Longgang District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN DARK ENERGY POWER SUPPLY Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |