CN107343245B - Pulse width modulation double PWM unit power amplifier module - Google Patents
Pulse width modulation double PWM unit power amplifier module Download PDFInfo
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- CN107343245B CN107343245B CN201710749314.5A CN201710749314A CN107343245B CN 107343245 B CN107343245 B CN 107343245B CN 201710749314 A CN201710749314 A CN 201710749314A CN 107343245 B CN107343245 B CN 107343245B
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- 239000003990 capacitor Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
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- 239000008186 active pharmaceutical agent Substances 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The invention discloses a pulse width modulation double-PWM unit power amplifier module which is arranged in a double-layer board mode, a digital power amplifier PWM pulse width modulation circuit comprises two groups of equivalent PWM power amplifier units, and two auxiliary circuits are provided. The invention provides a switching power supply isolation transformer circuit which is connected with a digital power amplifier PWM pulse width modulation circuit after passing through a starting/closing control circuit, wherein the output end of the switching power supply isolation transformer circuit is connected with a digital power amplifier main voltage rectifying and filtering circuit, an auxiliary power supply 1 rectifying and filtering circuit, an auxiliary power supply 2 rectifying and filtering circuit and a fan voltage rectifying and filtering circuit in parallel. The power amplifier module has perfect protection circuit, the digital power amplifier PWM pulse width modulation circuit is distributed on the upper circuit board, and the digital power amplifier PWM pulse width modulation circuit is distributed on the lower circuit board, so that the power amplifier module has reasonable layout, good heat dissipation effect and good sound quality fidelity effect.
Description
Technical Field
The invention relates to a power amplifier device, in particular to a double PWM unit pulse width modulation 350W+350W 500W+500W power amplifier module.
Background
The sound amplifier is widely applied in life, and the power amplifier is used for amplifying weaker signals input by sound source equipment to generate enough current to drive a loudspeaker to replay sound, and the power amplifier is used for amplifying audio electric signals to drive the loudspeaker of the sound box to make sound. Professional power amplifiers are commonly used for conferences, shows, halls, and public address of halls. The design is mainly characterized by high output power, perfect protection circuit and good heat dissipation. The sound quality of the sound box power amplifier directly influences the sound quality of the whole sound box, and the sound distortion and other conditions are often caused, so that the current sound box power amplifier has different powers, and the requirements of the different occasions on how to improve the design of signal processing in the power amplifier and adapt to various different occasions are discussed herein. Different power amplifiers are also different in internal signal processing, line design and production process due to consideration of power, impedance, distortion, dynamics and different use ranges and control and regulation functions. Professional power amplifiers are commonly used for conferences, shows, halls, and public address of halls. The design is mainly characterized by high output power, perfect protection circuit and good heat dissipation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and is formed by adopting a PWM (pulse width modulation) circuit, wherein a power amplifier module is arranged by double layers of plates, the digital power amplifier PWM circuit (pulse width modulation) circuit comprises two groups of equivalent PWM power amplifier units, and two sets of auxiliary circuits are provided: the auxiliary power supply 1 rectifying and filtering circuit and the auxiliary power supply 2 rectifying and filtering circuit are used for rectifying and filtering the output voltage and are suitable for high-power amplification output.
In order to achieve the above purpose, the technical scheme of the invention adopts a pulse width modulation double PWM unit (350W+350W 500W+500W) power amplifier module, which is implemented by the following modes:
the invention relates to a pulse width modulation double PWM unit power amplifier module, which is formed by arranging double layers of plates, wherein a digital power amplifier PWM circuit (pulse width modulation power amplifier circuit) is distributed on an upper circuit board (PCB), and the other power amplifier PWM circuits are arranged on a lower circuit board; the device comprises an EMI filter, a bridge rectifier filter circuit, a self-excitation type half-bridge switching power supply circuit and a switching power supply isolation transformer circuit which are sequentially connected, wherein the switching power supply isolation transformer circuit is connected with a digital power amplifier PWM pulse width modulation circuit after passing through a start/stop control circuit, the output end of the switching power supply isolation transformer circuit is connected with a digital power amplifier main voltage rectifier filter circuit, an auxiliary power supply 1 rectifier filter circuit, an auxiliary power supply 2 rectifier filter circuit and a fan voltage rectifier filter circuit in parallel, the auxiliary power supply 1 rectifier filter circuit is connected with a +/-5V auxiliary voltage 1 circuit after passing through a +/-12V auxiliary voltage 1 circuit, the output end of the +/-5V auxiliary voltage 1 circuit is connected with the digital power amplifier PWM pulse width modulation circuit, and the auxiliary power supply 1 rectifier filter circuit is connected with a +5V auxiliary voltage 2 circuit after passing through a +12V auxiliary voltage 2 circuit;
the digital power amplifier main voltage rectifying and filtering circuit is connected with the output power limiting circuit after passing through the current detection circuit, the output end of the current detection circuit is connected with the digital power amplifier PWM pulse width modulation circuit, the digital power amplifier main voltage rectifying and filtering circuit is connected with the digital power amplifier PWM pulse width modulation circuit after passing through the PWM driving chip power supply circuit, the output end of the digital power amplifier PWM pulse width modulation circuit is connected with the digital power amplifier output circuit and the protection indicating circuit, and the input end of the digital power amplifier PWM pulse width modulation circuit is connected with the signal protection circuit.
In some embodiments, the output end of the fan voltage rectifying and filtering circuit is connected with a fan speed regulating circuit, and the fan speed regulating circuit is connected with a digital power amplifier temperature monitoring circuit;
the input end of the EMI filter is connected with the AC input, the output end of the EMI filter is connected with the bridge rectifying and filtering circuit, the bridge rectifying and filtering circuit selects the input AC voltage, the output end of the bridge rectifying and filtering circuit is connected with the self-excited half-bridge switching power supply circuit, the self-excited half-bridge switching power supply circuit performs over-temperature/over-voltage/over-current protection, and the output end of the self-excited half-bridge switching power supply circuit is connected with the switching power supply isolation transformer circuit.
In some embodiments, the PWM driving chip power supply circuit includes a socket J5B, J2B, J6B, J B, the digital power amplifier PWM pulse width modulation circuit includes two sets of PWM power amplifier units, one socket J5B, J B of the PWM driving chip power supply circuit is connected to one PWM power amplifier unit, the other socket J6B, J B of the PWM driving chip power supply circuit is connected to another PWM power amplifier unit, pins 4, 5, 7 of the socket J5B are connected to +/-5V auxiliary voltage circuit 33, pin 3 of the socket J5B is grounded, and the socket J2B is grounded after passing through resistor R128A and capacitor C114; pin 8 of jack J6B is grounded; socket J4B is grounded through resistor R129A and capacitor C115.
In some embodiments, a port connected to an upper circuit board (PCB) is provided on a PWM driving chip power circuit (pulse width modulation power circuit), and the PWM driving chip power circuit is connected to the upper circuit board through two symmetrical sets of sockets J5B, J B and J6B, J B; pin 5 of interface J6B connects the emitter E of the PNP triode Q4 of the start/close control circuit, collector C of PNP triode Q4 of the start/close control circuit connects +/-12V and assists the power negative-12V of the voltage 1 circuit, collector C of PNP triode Q5 connects base B of PNP triode Q4 after resistance R187, base B of PNP triode Q4 is grounded after capacitor C144, base B of PNP triode Q4 connects MUTE interface MUTE.
In some embodiments, the digital power amplifier PWM pulse width modulation circuit (PWM power amplifier circuit) includes two groups of PWM power amplifier units, the first group of PWM power amplifier units includes a PWM pulse width modulation chip U2, a pin 15 of the chip U2 is connected to a +b terminal interface after passing through a resistor R39, a pin 10 of the chip U2 is connected to a power supply negative of a +/-12V auxiliary voltage 1 circuit, a pin 14 of the chip U2 is connected to a gate G of an NMOS tube D-FET3 after passing through a resistor R27, a pin 13 of the chip U2 is connected to a source S of the NMOS tube D-FET3 and a drain D of the NMOS tube D-FET4, a pin 13 of the chip U2 outputs a power amplifier signal, a drain D of the NMOS tube D-FET3 is connected to a +b terminal interface, a pin 16 of the chip U2 is connected to a drain D of the NMOS tube D-FET3 after passing through a resistor R44 and a positive-negative electrode of the diode D2, and a resistor R29 is connected in series between the resistor R44 and the resistor R27;
the source S of the NMOS tube D-FET3 is connected with the drain D of the NMOS tube D-FET4, the source S of the NMOS tube D-FET4 is connected with the pin 10 of the chip U2, the grid G of the NMOS tube D-FET4 is connected with the pin 11 of the chip U2 after passing through the resistor R28, and the grid G of the NMOS tube D-FET4 is connected with the source S of the NMOS tube D-FET4 after passing through the resistors R28 and R45 and the light emitting diode DS 2.
In some embodiments, an over-temperature protection circuit is arranged on a first group of PWM power amplifier units of the digital power amplifier PWM pulse width modulation circuit (pulse width modulation power amplifier circuit), the over-temperature protection circuit of the first group of PWM power amplifier units comprises a PNP triode Q1 and a thermistor PR1, a pin 1 of a chip U2 is connected with the thermistor PR1 and an emitter E of the PNP triode Q1 in parallel, a pin 1 of the chip U2 is connected with a base B of the PNP triode Q1 after passing through the thermistor PR1, and a base B of the PNP triode Q1 is grounded after passing through a resistor R15; the second group of PWM power amplifier units has the same structure as the first group of PWM power amplifier units.
The power amplifier module has perfect protection circuit, the digital power amplifier PWM pulse width modulation circuit is distributed on the upper circuit board, and the digital power amplifier PWM pulse width modulation circuit is distributed on the lower circuit board, so that the power amplifier module has reasonable layout, good heat dissipation effect and good sound quality fidelity effect.
Drawings
FIG. 1 is a schematic block diagram of a circuit of the present invention;
FIG. 2 is a schematic diagram of the power circuit of the PWM driving chip of the present invention;
FIG. 3 is a diagram of the electronic circuit of the PWM circuit of the digital power amplifier of the present invention;
fig. 4 is an electronic circuit diagram of a first PWM power amplifier unit according to the present invention.
The reference numerals are explained as follows:
the power supply comprises an EMI filter 11, a bridge rectifier filter circuit 12, a self-excited half-bridge switch power supply circuit 13, a switch power supply isolation transformer circuit 14, an on/off control circuit 15, an output power limiting circuit 16, a signal protection circuit 17, a digital power amplifier output circuit 18, a protection indicating circuit 19, a digital power amplifier main voltage rectifier filter circuit 21, a current detection circuit 22, a PWM driving chip power supply circuit 23, a digital power amplifier PWM pulse width modulation circuit 24, a subsidiary power supply 1 rectifier filter circuit 31, a +/-12V subsidiary voltage 1 circuit 32, a +12V subsidiary voltage 2 circuit 33, a +/-5V subsidiary voltage 1 circuit 34, a +5V subsidiary voltage 2 circuit 35, a subsidiary power supply 2 rectifier filter circuit 37, a fan voltage rectifier filter circuit 41, a fan speed regulation circuit 42 and a monitoring digital power amplifier temperature circuit 43.
Detailed Description
So that the manner in which the features and advantages of the invention, as well as the manner in which the features and advantages of the invention are attained and can be understood in detail, a more particular description of the invention, briefly summarized below, may be had by reference to the appended drawings and detailed description thereof which follow.
The power amplifier module is arranged by a double-layer board, a digital power amplifier PWM (pulse width modulation) circuit 24 (pulse width modulation power amplifier circuit) is distributed on an upper circuit board (PCB), and other power amplifier modules are arranged on a lower circuit board;
the EMI filter 11, the bridge rectifier filter circuit 12, the self-excited half-bridge switching power supply circuit 13 and the switching power supply isolation transformer circuit 14 are sequentially connected, the bridge rectifier filter circuit 12 selects input alternating voltage, and the self-excited half-bridge switching power supply circuit 13 performs over-temperature/over-voltage/over-current protection.
The switching power supply isolation transformer circuit 14 is connected with the digital power amplifier PWM pulse width modulation circuit 24 after passing through the starting/closing control circuit 15, the output end of the switching power supply isolation transformer circuit 14 is connected with the digital power amplifier main voltage rectification filter circuit 21, the auxiliary power supply 1 rectification filter circuit 31, the auxiliary power supply 2 rectification filter circuit 37 and the fan voltage rectification filter circuit 41 in parallel, the auxiliary power supply 1 rectification filter circuit 31 is connected with the +/-5V auxiliary voltage 1 circuit 34 after passing through the +/-12V auxiliary voltage 1 circuit 32, the output end of the +/-5V auxiliary voltage 1 circuit 34 is connected with the digital power amplifier PWM pulse width modulation circuit 24, and the auxiliary power supply 1 rectification filter circuit 31 is connected with the +5V auxiliary voltage 2 circuit 35 after passing through the +12V auxiliary voltage 2 circuit 33;
the digital power amplifier main voltage rectifying and filtering circuit 21 is connected with the output power limiting circuit 16 after passing through the current detection circuit 22, the output end of the current detection circuit 22 is connected with the digital power amplifier PWM pulse width modulation circuit 24, the digital power amplifier main voltage rectifying and filtering circuit 21 is connected with the digital power amplifier PWM pulse width modulation circuit 24 after passing through the PWM driving chip power supply circuit 23, the output end of the digital power amplifier PWM pulse width modulation circuit 24 is connected with the digital power amplifier output circuit 18 and the protection indicating circuit 19, and the input end of the digital power amplifier PWM pulse width modulation circuit 24 is connected with the signal protection circuit 17.
Signal protection circuit 17: signal amplification/mode conversion/buffer protection is carried out, and signal input of the channel 1-2 power amplifier is received; the digital power amplifier output circuit 18 can perform filtering/detection/energy recovery and provide channel 1-2 power amplifier output; the protection indication circuit 19 provides direct current/over temperature/over current/over voltage protection and outputs a protection indication.
The +/-12V auxiliary voltage 1 circuit 32 provides +/-12V auxiliary voltage output 1; +12v auxiliary voltage 2 circuit 33 provides +12v auxiliary voltage output 2 (optional); +5v auxiliary voltage 2 circuit 35 provides +5v auxiliary voltage output 2 (optional); auxiliary power supply 2 rectifying and filtering circuit 37 provides a +48V output (optional).
The input end of the EMI filter 11 is connected with AC input, the output end of the EMI filter 11 is connected with a bridge rectifier filter circuit 12, the bridge rectifier filter circuit 12 selects input AC voltage, the output end of the bridge rectifier filter circuit 12 is connected with a self-excited half-bridge switching power supply circuit 13, the self-excited half-bridge switching power supply circuit 13 performs over-temperature/over-voltage/over-current protection (a direct current protection module- -DC deflection, a thermistor, power limiting, current limiting, alarming, shutdown, an over-temperature protection module- -hiccup protection- -cooling self-starting, reset protection- -power-on Reset, software or manual Reset), and the output end of the self-excited half-bridge switching power supply circuit 13 is connected with a switching power supply isolation transformer circuit 14.
The digital power amplifier output circuit 18 outputs signals for simultaneous filtering/detection/energy recovery.
The output end of the fan voltage rectifying and filtering circuit 41 is connected with a fan speed regulating circuit 42, and the fan speed regulating circuit 42 is connected with a digital power amplifier temperature monitoring circuit 43.
The PWM driving chip power supply circuit 23 comprises a jack J5B, J2B, J6B, J B, the digital power amplification PWM pulse width modulation circuit 24 comprises two groups of PWM power amplification units, one group of jack J5B, J B of the PWM driving chip power supply circuit 23 is connected with one PWM power amplification unit, the other group of jack J6B, J B of the PWM driving chip power supply circuit 23 is connected with the other PWM power amplification unit, pins 4, 5 and 7 of the jack J5B are connected with +/-5V auxiliary voltage circuit 33, pin 3 of the jack J5B is grounded, and the jack J2B is grounded after passing through a resistor R128A and a capacitor C114; pin 8 of jack J6B is grounded; socket J4B is grounded through resistor R129A and capacitor C115.
The PWM driving chip power supply circuit 23 (pulse width modulation power supply circuit) is provided with a port connected with an upper circuit board (PCB), and the PWM driving chip power supply circuit 23 is connected with the upper circuit board through two sets of sockets J5B, J B and J6B, J B.
Pin 5 of interface J6B connects the emitter E of PNP triode Q4 of start/close control circuit 15, the collector C of PNP triode Q4 of start/close control circuit 15 connects +/-12V and assists the power negative-12V of voltage 1 circuit 32, collector C of PNP triode Q5 connects base B of PNP triode Q4 after resistance R187, base B of PNP triode Q4 is grounded after capacitor C144, base B of PNP triode Q4 connects MUTE interface MUTE.
The digital power amplification PWM pulse width modulation circuit 24 (pulse width modulation power amplification circuit) comprises two groups of equivalent PWM power amplification units, the first group of PWM power amplification units comprises a PWM pulse width modulation chip U2, a pin 15 of the chip U2 is connected with a +B end interface after passing through a resistor R39, a pin 10 of the chip U2 is connected with a power source negative electrode of a +/-12V auxiliary voltage 1 circuit 32, a pin 14 of the chip U2 is connected with a grid G of an NMOS tube D-FET3 after passing through a resistor R27, a pin 13 of the chip U2 is connected with a source S of the NMOS tube D-FET3 and a drain D of the NMOS tube D-FET4, a pin 13 of the chip U2 outputs a power amplification signal, a drain D of the NMOS tube D-FET3 is connected with a +B end interface, a pin 16 of the chip U2 is connected with a drain D of the NMOS tube D-FET3 after passing through a resistor R44 and a positive electrode-negative electrode of a diode D2, and a resistor R29 is connected in series between the resistor R44 and the resistor R27.
The source S of the NMOS tube D-FET3 is connected with the drain D of the NMOS tube D-FET4, the source S of the NMOS tube D-FET4 is connected with the pin 10 of the chip U2, the grid G of the NMOS tube D-FET4 is connected with the pin 11 of the chip U2 after passing through the resistor R28, and the grid G of the NMOS tube D-FET4 is connected with the source S of the NMOS tube D-FET4 after passing through the resistors R28 and R45 and the light emitting diode DS 2.
An over-temperature protection circuit is arranged on a first group of PWM power amplification units of the digital power amplification PWM pulse width modulation circuit 24 (pulse width modulation power amplification circuit), the over-temperature protection circuit of the first group of PWM power amplification units comprises a PNP triode Q1 and a thermistor PR1, a pin 1 of a chip U2 is connected with the thermistor PR1 and an emitter E of the PNP triode Q1 in parallel, a pin 1 of the chip U2 is connected with a base B of the PNP triode Q1 after passing through the thermistor PR1, and the base B of the PNP triode Q1 is grounded after passing through a resistor R15; the second group of PWM power amplifier units has the same structure as the first group of PWM power amplifier units.
The above examples only represent some embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (2)
1. The power amplifier module is arranged in a double-layer board mode, a digital power amplifier PWM (pulse width modulation) circuit (24) is distributed on an upper-layer PCB, and other power amplifier PWM circuits are arranged on a lower-layer PCB; the digital power amplification PWM pulse width modulation circuit (24) comprises two groups of equivalent PWM power amplification units, and two sets of auxiliary circuits are provided: the auxiliary power supply 1 rectifying and filtering circuit (31) and the auxiliary power supply 2 rectifying and filtering circuit (37) are used for rectifying and filtering the voltage to output the voltage;
the EMI filter (11), the bridge rectifier filter circuit (12), the self-excited half-bridge switching power supply circuit (13) and the switching power supply isolation transformer circuit (14) are sequentially connected; the power supply control circuit is characterized in that a switch power supply isolation transformer circuit (14) is connected with a digital power amplifier PWM pulse width modulation circuit (24) after passing through a starting/closing control circuit (15), the output end of the switch power supply isolation transformer circuit (14) is connected with a digital power amplifier main voltage rectification filter circuit (21), an auxiliary power supply 1 rectification filter circuit (31), an auxiliary power supply 2 rectification filter circuit (37) and a fan voltage rectification filter circuit (41) in parallel, the auxiliary power supply 1 rectification filter circuit (31) is connected with a +/-5V auxiliary voltage 1 circuit (34) after passing through a +/-12V auxiliary voltage 1 circuit (32), the output end of the +/-5V auxiliary voltage 1 circuit (34) is connected with the digital power amplifier PWM pulse width modulation circuit (24), and the auxiliary power supply 1 rectification filter circuit (31) is connected with a +5V auxiliary voltage 2 circuit (35) after passing through a +12V auxiliary voltage 2 circuit (33);
a +/-12V auxiliary voltage 1 circuit (32) provides +/-12V auxiliary voltage output 1, +12V auxiliary voltage 2 circuit (33) provides +12V auxiliary voltage output 2, +5V auxiliary voltage 2 circuit (35) provides +5V auxiliary voltage output 2, and an auxiliary power supply 2 rectifying and filtering circuit (37) provides +48V output;
the digital power amplifier main voltage rectifying and filtering circuit (21) is connected with the output power limiting circuit (16) after passing through the current detection circuit (22), the output end of the current detection circuit (22) is connected with the digital power amplifier PWM pulse width modulation circuit (24), the digital power amplifier main voltage rectifying and filtering circuit (21) is connected with the digital power amplifier PWM pulse width modulation circuit (24) after passing through the PWM driving chip power supply circuit (23), the output end of the digital power amplifier PWM pulse width modulation circuit (24) is connected with the digital power amplifier output circuit (18) and the protection indicating circuit (19), and the input end of the digital power amplifier PWM pulse width modulation circuit (24) is connected with the signal protection circuit (17);
the signal protection circuit (17) performs amplification/mode conversion/buffer protection and receives the power amplification signal input of the channel 1-2; the digital power amplifier output circuit (18) performs filtering/detection/energy recovery and provides channel 1-2 power amplifier output; the protection indication circuit (19) provides direct current/over temperature/over current/over voltage protection and outputs protection indication;
the input end of the EMI filter (11) is connected with AC alternating current input, the output end of the EMI filter (11) is connected with a bridge rectifier filter circuit (12), the bridge rectifier filter circuit (12) selects the input alternating voltage, the output end of the bridge rectifier filter circuit (12) is connected with a self-excited half-bridge switching power supply circuit (13), the self-excited half-bridge switching power supply circuit (13) performs over-temperature/over-voltage/over-current protection, and the output end of the self-excited half-bridge switching power supply circuit (13) is connected with a switching power supply isolation transformer circuit (14);
the digital power amplifier output circuit (18) outputs signals and performs filtering/detection/energy recovery at the same time;
the PWM driving chip power supply circuit (23) comprises a socket J5B, J2B, J6B, J B, the digital power amplification PWM pulse width modulation circuit (24) comprises two groups of PWM power amplification units, one group of socket J5B, J B is connected with one PWM power amplification unit, one group of socket J6B, J B is connected with the other PWM power amplification unit, pins 4, 5 and 7 of the socket J5B are connected with +/-5V auxiliary voltage circuit (33), pin 3 of the socket J5B is grounded, and the socket J2B is grounded after passing through a resistor R128A and a capacitor C114; pin 8 of jack J6B is grounded; the jack J4B is grounded after passing through a resistor R129A and a capacitor C115;
the PWM driving chip power circuit (23) is provided with a port of an upper PCB circuit board, and the PWM driving chip power circuit (23) is connected with the upper PCB board through two groups of jacks J5B, J B and J6B, J B;
pin 5 of the interface J6B is connected with emitter E of PNP triode Q4 of the start/close control circuit (15), collector C of PNP triode Q4 of the start/close control circuit (15) is connected with negative-12V of power supply of +/-12V auxiliary voltage 1 circuit (32), collector C of PNP triode Q5 is connected with base B of PNP triode Q4 after passing through resistor R187, base B of PNP triode Q4 is grounded after passing through capacitor C144, base B of PNP triode Q4 is connected with MUTE interface MUTE;
the digital power amplification PWM pulse width modulation circuit (24) comprises two groups of two equivalent PWM power amplification units, the first group of PWM power amplification units comprises a PWM pulse width modulation chip U2, a pin 15 of the chip U2 is connected with a +B end interface after passing through a resistor R39, a pin 10 of the chip U2 is connected with a power source negative of a +/-12V auxiliary voltage 1 circuit (32), a pin 14 of the chip U2 is connected with a grid G of an NMOS tube FDP53 after passing through a resistor R27, a pin 13 of the chip U2 is connected with a source S of the NMOS tube FDP53 and a drain D of the NMOS tube FDP54, a pin 13 of the chip U2 outputs a power amplification signal, a drain D of the NMOS tube FDP53 is connected with a +B end interface, a pin 16 of the chip U2 is connected with a drain D of the NMOS tube FDP53 after passing through a positive electrode and a negative electrode of the diode D2, and a resistor R29 is connected in series between the resistor R44 and the resistor R27;
the source electrode S of the NMOS tube FDP53 is connected with the drain electrode D of the NMOS tube FDP54, the source electrode S of the NMOS tube FDP54 is connected with the pin 10 of the chip U2, the grid electrode G of the NMOS tube FDP54 is connected with the pin 11 of the chip U2 after passing through the resistor R28, and the grid electrode G of the NMOS tube FDP54 is connected with the source electrode S of the NMOS tube FDP54 after passing through the resistors R28 and R45 and the light-emitting diode DS 2;
an over-temperature protection circuit is arranged on a first group of PWM power amplification units of the digital power amplification PWM pulse width modulation circuit (24), the over-temperature protection circuit of the first group of PWM power amplification units comprises a PNP triode Q1 and a thermistor PR1, a pin 1 of a chip U2 is connected with the thermistor PR1 and an emitter E of the PNP triode Q1 in parallel, a pin 1 of the chip U2 is connected with a base B of the PNP triode Q1 after passing through the thermistor PR1, and the base B of the PNP triode Q1 is grounded after passing through a resistor R15; the second group of PWM power amplifier units are identical to the first group of PWM power amplifier units.
2. The Pulse Width Modulation (PWM) unit power amplifier module set according to claim 1, wherein the output end of the fan voltage rectifying and filtering circuit (41) is connected with a fan speed regulating circuit (42), and the fan speed regulating circuit (42) is connected with a digital power amplifier temperature monitoring circuit (43).
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058496A (en) * | 1990-06-05 | 1992-02-05 | 大陆电子公司 | Method with power amplifier and this amplifier of operation of a plurality of switching stages |
| US5534768A (en) * | 1994-02-09 | 1996-07-09 | Harris Corporation | Regulated power supply having wide input AC/DC voltage range |
| JP2006340152A (en) * | 2005-06-03 | 2006-12-14 | Matsushita Electric Ind Co Ltd | Digital amplification method and digital amplification circuit |
| CN101023580A (en) * | 2004-09-21 | 2007-08-22 | 罗姆股份有限公司 | Audio power amplifier ic and audio system equipped therewith |
| JP2008048262A (en) * | 2006-08-18 | 2008-02-28 | D & M Holdings Inc | Switching amplifier unit |
| CN101247108A (en) * | 2008-03-24 | 2008-08-20 | 京信通信系统（中国）有限公司 | Integrated digital predistortion power amplifier |
| CN201585114U (en) * | 2009-12-22 | 2010-09-15 | 宁波启发电子有限公司 | Sound box |
| CN202374223U (en) * | 2011-12-07 | 2012-08-08 | 深圳东原电子有限公司 | Fully digital audio amplification circuit for household active speakers |
| CN202587375U (en) * | 2012-03-07 | 2012-12-05 | 东莞精恒电子有限公司 | Novel power amplification module system |
| CN102832694A (en) * | 2012-08-17 | 2012-12-19 | 佛山市柏克新能科技股份有限公司 | Auxiliary power supply of high-power UPS (uninterrupted power supply) |
| CN104485908A (en) * | 2014-11-14 | 2015-04-01 | 河北高达电子科技有限公司 | 1000w digital power amplifier |
| CN106160677A (en) * | 2016-06-16 | 2016-11-23 | 长沙湘计海盾科技有限公司 | A kind of carried shift PWM modulation type digital power amplifier and power-magnifying method |
-
2017
- 2017-08-28 CN CN201710749314.5A patent/CN107343245B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058496A (en) * | 1990-06-05 | 1992-02-05 | 大陆电子公司 | Method with power amplifier and this amplifier of operation of a plurality of switching stages |
| US5534768A (en) * | 1994-02-09 | 1996-07-09 | Harris Corporation | Regulated power supply having wide input AC/DC voltage range |
| CN101023580A (en) * | 2004-09-21 | 2007-08-22 | 罗姆股份有限公司 | Audio power amplifier ic and audio system equipped therewith |
| JP2006340152A (en) * | 2005-06-03 | 2006-12-14 | Matsushita Electric Ind Co Ltd | Digital amplification method and digital amplification circuit |
| JP2008048262A (en) * | 2006-08-18 | 2008-02-28 | D & M Holdings Inc | Switching amplifier unit |
| CN101247108A (en) * | 2008-03-24 | 2008-08-20 | 京信通信系统（中国）有限公司 | Integrated digital predistortion power amplifier |
| CN201585114U (en) * | 2009-12-22 | 2010-09-15 | 宁波启发电子有限公司 | Sound box |
| CN202374223U (en) * | 2011-12-07 | 2012-08-08 | 深圳东原电子有限公司 | Fully digital audio amplification circuit for household active speakers |
| CN202587375U (en) * | 2012-03-07 | 2012-12-05 | 东莞精恒电子有限公司 | Novel power amplification module system |
| CN102832694A (en) * | 2012-08-17 | 2012-12-19 | 佛山市柏克新能科技股份有限公司 | Auxiliary power supply of high-power UPS (uninterrupted power supply) |
| CN104485908A (en) * | 2014-11-14 | 2015-04-01 | 河北高达电子科技有限公司 | 1000w digital power amplifier |
| CN106160677A (en) * | 2016-06-16 | 2016-11-23 | 长沙湘计海盾科技有限公司 | A kind of carried shift PWM modulation type digital power amplifier and power-magnifying method |
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