CN218549751U - Audio power amplifier power supply circuit - Google Patents
Audio power amplifier power supply circuit Download PDFInfo
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- CN218549751U CN218549751U CN202222856237.2U CN202222856237U CN218549751U CN 218549751 U CN218549751 U CN 218549751U CN 202222856237 U CN202222856237 U CN 202222856237U CN 218549751 U CN218549751 U CN 218549751U
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Abstract
The utility model discloses an audio power amplifier power supply circuit, which relates to the technical field of electronic circuits and comprises a power module for supplying power; the positive and negative voltage stabilization module is used for outputting positive and negative value voltage stabilization; the protection module is used for judging short circuit and overcurrent and controlling the work of the drive control module; the driving control module is used for providing pulse voltage and driving the positive and negative regulation modules to work; the positive and negative regulation module is used for carrying out voltage reduction treatment and outputting positive and negative voltages; and the output module is used for outputting voltage. The utility model discloses audio power amplifier supply circuit adopts simple voltage stabilizing circuit to improve required stable positive and negative voltage for the audio frequency power supply to overflow and short circuit detection and protection are carried out to the positive value voltage of steady voltage output by protection module, improve supply circuit's security, adopt positive and negative adjusting module to carry out step-down processing to the steady voltage value of input simultaneously, positive and negative voltage that the output absolute value is equal.
Description
Technical Field
The utility model relates to an electronic circuit technical field specifically is an audio power amplifier supply circuit.
Background
One set of audio system that the combination of electrical equipment made sound is refered in particular to stereo set electrical apparatus, comparatively extensive application has in the vocal field, it adopts audio power amplifier circuit to handle audio signal mostly, so as to improve the tone quality effect of broadcast, present audio power amplifier circuit adopts positive negative power supply to provide required electric energy for it mostly, and adopt switch circuit to carry out output power supply topology mostly, so as to export required negative voltage, because by the control of different circuits, inequality condition appears very easily in positive negative voltage, and switch power supply volume is great, consequently, remain to improve.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an audio power amplifier supply circuit to solve the problem that proposes among the above-mentioned background art.
The embodiment of the utility model provides an in, a audio power amplifier supply circuit is provided, this audio power amplifier supply circuit includes: the device comprises a power module, a positive and negative voltage stabilizing module, a protection module, a driving control module, a positive and negative adjusting module and an output module;
the power supply module is used for carrying out voltage reduction, rectification and filtering processing on input electric energy;
the positive and negative voltage stabilizing module is connected with the power supply module, is used for performing voltage stabilizing processing and positive and negative conversion processing on input electric energy, and is used for outputting first positive and negative voltage;
the protection module is connected with the positive and negative voltage stabilizing modules, is used for detecting the positive voltage condition output by the positive and negative voltage stabilizing modules, and is used for judging short circuit and overcurrent and outputting a protection instruction;
the driving control module is connected with the protection module and the positive and negative regulation module and is used for providing pulse voltage and driving the positive and negative regulation module to work;
the positive and negative regulation module is connected with the positive and negative voltage stabilization module, is used for receiving the first positive and negative voltage output by the positive and negative voltage stabilization module, and is used for carrying out voltage reduction processing and outputting a second positive and negative voltage;
the output module is connected with the positive and negative voltage stabilizing module and the positive and negative adjusting module and used for receiving and outputting the voltages output by the positive and negative voltage stabilizing module and the positive and negative adjusting module.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses audio power amplifier supply circuit adopts simple voltage stabilizing circuit to improve required positive and negative value voltage for the audio frequency power supply, and overflow and short circuit detection and protection to the positive value voltage of steady voltage output by protection module, improve supply circuit's security, adopt positive and negative adjusting module to step down the processing to the steady voltage value of input simultaneously, and output the positive and negative value voltage that the absolute value is equal, improve the voltage value figure that supply circuit can provide, and the circuit structure of circuit is comparatively simple, the cost is lower and small.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a circuit diagram of an audio power amplifier power supply circuit provided by an example of the present invention.
Fig. 3 is a connection circuit diagram of a driving control module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In embodiment 1, referring to fig. 1, an audio power amplifier power supply circuit includes: the device comprises a power module 1, a positive and negative voltage stabilizing module 2, a protection module 3, a driving control module 4, a positive and negative adjusting module 5 and an output module 6;
specifically, the power module 1 is configured to perform voltage reduction, rectification and filtering processing on input electric energy;
the positive and negative voltage stabilization module 2 is connected with the power supply module 1, is used for performing voltage stabilization processing and positive and negative conversion processing on input electric energy, and is used for outputting a first positive and negative voltage;
the protection module 3 is connected with the positive and negative voltage stabilizing modules 2, and is used for detecting the positive voltage output by the positive and negative voltage stabilizing modules 2, judging short circuit and overcurrent and outputting a protection instruction;
the driving control module 4 is connected with the protection module 3 and the positive and negative regulation module 5 and is used for providing pulse voltage and driving the positive and negative regulation module 5 to work;
the positive and negative regulation module 5 is connected with the positive and negative voltage stabilization module 2, and is used for receiving the first positive and negative voltage output by the positive and negative voltage stabilization module 2, performing voltage reduction processing and outputting a second positive and negative voltage;
and the output module 6 is connected with the positive and negative voltage stabilizing module 2 and the positive and negative adjusting module 5 and is used for receiving and outputting the voltages output by the positive and negative voltage stabilizing module 2 and the positive and negative adjusting module 5.
In a specific embodiment, the power module 1 may be composed of a power input port, a transformer W, a rectifier T, and a filter capacitor C13.
In this embodiment, referring to fig. 2 and fig. 3, the positive and negative voltage stabilizing module 2 includes a first capacitor C1, a second capacitor C2, a first voltage regulator IC1, a third capacitor C3, a fourth capacitor C4, a second voltage regulator IC2, a first diode D1, and a second diode D2;
specifically, one end of the first capacitor C1 is connected to the power module 1, one end of the second capacitor C2, the first end of the second regulator IC2 and the first end of the first regulator IC1, the third end of the first regulator IC1 is connected to one end of the third capacitor C3, the cathode of the first diode D1 and the positive and negative regulation module 5, the second end of the second regulator tube is connected to one end of the fourth capacitor C4 and the anode of the second diode D2, and the third end of the first regulator tube, the other end of the first capacitor C1, the other end of the third capacitor C3, the other end of the second capacitor C2, the third end of the second regulator IC2, the other end of the fourth capacitor C4, the anode of the first diode D1 and the cathode of the second diode D2 are all grounded.
In an embodiment, the first regulator IC1 and the second regulator tube may be both 78XX series three-terminal integrated regulators.
Further, the positive and negative regulation module 5 includes a first switching tube VT1, a second switching tube VT2, a fifth capacitor C5, a fourth diode D4, a third diode D2, a seventh capacitor C7, a first resistor R1, and a ninth capacitor C9; the output module 6 comprises an output port;
specifically, the collector of the first switching tube VT1 is connected to the second end of the first voltage regulator IC1, the base of the first switching tube VT1 and the base of the second switching tube VT2 are both connected to the driving control module 4, the emitter of the first switching tube VT1 is connected to the emitter of the second switching tube VT2 and is connected to the cathode of the fourth diode D4 and the anode of the third diode D2 through the fifth capacitor C5, the cathode of the third diode D2 is connected to one end of the seventh capacitor C7 and is connected to one end of the ninth capacitor C9 and the output port through the first resistor R1, and the two anodes of the fourth diode D4, the collector of the second switching tube VT2, the other end of the seventh capacitor C7 and the other end of the ninth capacitor C9 are all grounded.
Further, the positive and negative regulation module 5 further includes a third switching tube VT3, a fourth switching tube VT4, a sixth capacitor C6, a fifth diode D5, a sixth diode D6, an eighth capacitor C8, a second resistor R2, and a tenth capacitor C10;
specifically, the circuit connection structure of the third switch tube VT3, the fourth switch tube VT4, the sixth capacitor C6, the fifth diode D5, the sixth diode D6, the eighth capacitor C8, the second resistor R2, and the tenth capacitor C10 is the same as the circuit connection structure of the first switch tube VT1, the second switch tube VT2, the fifth capacitor C5, the fourth diode D4, the third diode D2, the seventh capacitor C7, the first resistor R1, and the ninth capacitor C9, and the input electric energy of the fourth switch tube VT4 is connected to the second end of the second voltage regulator tube.
In a specific embodiment, the first switching tube VT1 and the fourth switching tube VT4 may be NPN-type triodes, and the second switching tube VT2 and the third switching tube VT3 may be PNP-type triodes, which together form a common collector amplifying circuit; the fourth diode D4 and the third diode D2, and the fifth diode D5 and the sixth diode D6 constitute a voltage-doubling rectifying circuit.
Further, the protection module 3 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a fifth switching tube VT5, a sixth resistor R6, an eleventh capacitor C11, a seventh resistor R7, an eighth resistor R8, a trigger U1, and a sixth switching tube VT6;
specifically, one end of the third resistor R3 and an emitter of the fifth switching tube VT5 are both connected to the second end of the first voltage regulator tube, the other end of the third resistor R3 is connected to one end of the fifth resistor R5 and is connected to the ground through the fourth resistor R4, the other end of the fifth resistor R5 is connected to a base of the fifth switching tube VT5, a collector of the fifth switching tube VT5 is connected to the trigger end of the trigger U1, one end of the eleventh capacitor C11 and one end of the seventh resistor R7 through the sixth resistor R6, the other end of the seventh resistor R7 and the other end of the eleventh capacitor C11 are both grounded, the output end of the trigger U1 is connected to a base of the sixth switching tube VT6 through the eighth resistor R8, an emitter of the sixth switching tube VT6 is grounded, and a collector of the sixth switching tube VT6 is connected to the drive control module 4.
In a specific embodiment, the fifth switching transistor VT5 may be a PNP type triode; the sixth switching tube VT6 may be an NPN transistor; the trigger U1 can be a CD4013 chip.
Further, the driving control module 4 includes a ninth resistor R9, a tenth resistor R10, a twelfth capacitor C12, and a driver U2;
specifically, one end of the ninth resistor R9 is connected to the tenth end of the driver U2, the twelfth end of the driver U2 is connected to the tenth end of the driver U2 and one end of the tenth resistor R10, the tenth end of the driver U2 is connected to the third end of the driver U2, the other end of the twelfth capacitor C12 and the first end of the driver U2, the fourth end of the driver U2 is connected to the collector of the sixth switching tube VT6, the base of the third switching tube VT3, the second end, the fifth end and the ninth end of the driver U2, and the sixth end and the eighth end of the driver U2 are both connected to the base of the first switching tube VT 1.
In a specific embodiment, the driver U2 may use a CD4069 inverter to output two sets of pulse voltages with opposite phases to provide pulse signals for the first switching transistor VT1, the second switching transistor VT2, the third switching transistor VT3, and the fourth switching transistor VT 4.
The utility model relates to an audio power amplifier supply circuit, step down by power module 1 to the electric energy of input, rectification and filtering process, electric energy transmission after the processing is for first stabilivolt and second stabilivolt, carry out steady voltage and positive negative pole processing to the electric energy of input by first stabilivolt and second stabilivolt respectively, and by first switch tube VT1 and second switch tube VT2, the common collecting electrode amplifier circuit that third switch tube VT3 and fourth switch tube VT4 are constituteed carries out step-down processing to the positive negative pole voltage of input respectively, and export the negative voltage that positive value voltage and absolute value and positive value equal, so that provide required positive and negative value voltage for audio power amplifier, wherein the positive value voltage of positive and negative voltage module 2 output carries out short circuit and short circuit detection by protection module 3, specifically carry out the electric energy sampling by third resistance VT3, when short circuit or overcurrent appear, fifth switch tube VT5 will switch on, make trigger U1's end input high level, then by output control sixth switch tube VT6, make drive control module 4 stop work, wherein drive control module comprises positive and negative switch tube VT4 and second switch tube VT5 and the second switch tube VT4, the positive and second switch tube VT3 are controlled by the control circuit and the reverse.
This audio power amplifier supply circuit adopts simple voltage stabilizing circuit to improve required stable positive and negative value voltage for the audio frequency power supply, and carry out overcurrent and short circuit detection and protection to the positive value voltage of steady voltage output by protection module 3, improve supply circuit's security, adopt positive and negative regulating module 5 to carry out step-down processing to the steady voltage value of input simultaneously, and the positive and negative value voltage that the output absolute value is equal improves, the voltage value figure that improvement supply circuit can provide, and the circuit structure of circuit is comparatively simple, the cost is lower and small.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (6)
1. An audio power amplifier power supply circuit is characterized in that,
this audio power amplifier supply circuit includes: the device comprises a power module, a positive and negative voltage stabilizing module, a protection module, a driving control module, a positive and negative adjusting module and an output module;
the power supply module is used for carrying out voltage reduction, rectification and filtering processing on input electric energy;
the positive and negative voltage stabilizing module is connected with the power supply module, is used for performing voltage stabilizing processing and positive and negative conversion processing on input electric energy, and is used for outputting first positive and negative voltage;
the protection module is connected with the positive and negative voltage stabilizing modules, is used for detecting the positive voltage condition output by the positive and negative voltage stabilizing modules, and is used for judging short circuit and overcurrent and outputting a protection instruction;
the driving control module is connected with the protection module and the positive and negative regulation module and is used for providing pulse voltage and driving the positive and negative regulation module to work;
the positive and negative regulation module is connected with the positive and negative voltage stabilization module, is used for receiving the first positive and negative voltage output by the positive and negative voltage stabilization module, and is used for carrying out voltage reduction processing and outputting a second positive and negative voltage;
the output module is connected with the positive and negative voltage stabilizing module and the positive and negative adjusting module and is used for receiving and outputting the voltages output by the positive and negative voltage stabilizing module and the positive and negative adjusting module.
2. The power supply circuit of an audio power amplifier according to claim 1, wherein the positive and negative voltage stabilization module comprises a first capacitor, a second capacitor, a first voltage stabilizer, a third capacitor, a fourth capacitor, a second voltage stabilizer, a first diode, and a second diode;
one end of the first capacitor is connected with the power module, one end of the second capacitor, the first end of the second voltage stabilizer and the first end of the first voltage stabilizer, the third end of the first voltage stabilizer is connected with one end of the third capacitor, the cathode of the first diode and the positive and negative regulation module, the second end of the second voltage stabilizer is connected with one end of the fourth capacitor and the anode of the second diode, and the third end of the first voltage stabilizer, the other end of the first capacitor, the other end of the third capacitor, the other end of the second capacitor, the third end of the second voltage stabilizer, the other end of the fourth capacitor, the anode of the first diode and the cathode of the second diode are all grounded.
3. The power supply circuit of an audio power amplifier according to claim 2, wherein the positive and negative regulation module comprises a first switch tube, a second switch tube, a fifth capacitor, a fourth diode, a third diode, a seventh capacitor, a first resistor, and a ninth capacitor; the output module comprises an output port;
the collector of the first switch tube is connected with the second end of the first voltage stabilizer, the base of the first switch tube and the base of the second switch tube are both connected with the drive control module, the emitter of the first switch tube is connected with the emitter of the second switch tube and is connected with the cathode of the fourth diode and the anode of the third diode through the fifth capacitor, the cathode of the third diode is connected with one end of the seventh capacitor and is connected with one end of the ninth capacitor and the output port through the first resistor, and the second anode of the fourth diode, the collector of the second switch tube, the other end of the seventh capacitor and the other end of the ninth capacitor are all grounded.
4. The audio power amplifier power supply circuit according to claim 3, wherein the positive and negative regulation module further comprises a third switching tube, a fourth switching tube, a sixth capacitor, a fifth diode, a sixth diode, an eighth capacitor, a second resistor, and a tenth capacitor;
the circuit connection structure of the third switch tube, the fourth switch tube, the sixth capacitor, the fifth diode, the sixth diode, the eighth capacitor, the second resistor and the tenth capacitor is the same as the circuit connection structure of the first switch tube, the second switch tube, the fifth capacitor, the fourth diode, the third diode, the seventh capacitor, the first resistor and the ninth capacitor, and the input electric energy of the fourth switch tube is connected with the second end of the second voltage stabilizing tube.
5. The audio power amplifier power supply circuit according to claim 4, wherein the protection module comprises a third resistor, a fourth resistor, a fifth switch tube, a sixth resistor, an eleventh capacitor, a seventh resistor, an eighth resistor, a trigger, and a sixth switch tube;
one end of the third resistor and an emitting electrode of the fifth switch tube are connected with the second end of the first voltage regulator tube, the other end of the third resistor is connected with one end of the fifth resistor and connected with the ground end through the fourth resistor, the other end of the fifth resistor is connected with a base electrode of the fifth switch tube, a collector electrode of the fifth switch tube is connected with a trigger end of the trigger, one end of the eleventh capacitor and one end of the seventh resistor through the sixth resistor, the other end of the seventh resistor and the other end of the eleventh capacitor are grounded, an output end of the trigger is connected with a base electrode of the sixth switch tube through the eighth resistor, an emitting electrode of the sixth switch tube is grounded, and a collector electrode of the sixth switch tube is connected with the driving control module.
6. The power supply circuit of an audio power amplifier according to claim 5, wherein the driving control module comprises a ninth resistor, a tenth resistor, a twelfth capacitor and a driver;
one end of the ninth resistor is connected with the thirteenth end of the driver, the twelfth end of the driver is connected with the eleventh end of the driver and one end of the tenth resistor, the tenth end of the driver is connected with the third end of the driver, the other end of the twelfth capacitor and the first end of the driver, the fourth end of the driver is connected with the collector of the sixth switching tube, the base of the third switching tube, the second end, the fifth end and the ninth end of the driver, and the sixth end and the eighth end of the driver are connected with the base of the first switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222856237.2U CN218549751U (en) | 2022-10-28 | 2022-10-28 | Audio power amplifier power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222856237.2U CN218549751U (en) | 2022-10-28 | 2022-10-28 | Audio power amplifier power supply circuit |
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| Publication Number | Publication Date |
|---|---|
| CN218549751U true CN218549751U (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222856237.2U Active CN218549751U (en) | 2022-10-28 | 2022-10-28 | Audio power amplifier power supply circuit |
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| Country | Link |
|---|---|
| CN (1) | CN218549751U (en) |
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- 2022-10-28 CN CN202222856237.2U patent/CN218549751U/en active Active
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