CN107343245A - A kind of double PWM unit power amplifier modules of pulsewidth modulation - Google Patents
A kind of double PWM unit power amplifier modules of pulsewidth modulation Download PDFInfo
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- CN107343245A CN107343245A CN201710749314.5A CN201710749314A CN107343245A CN 107343245 A CN107343245 A CN 107343245A CN 201710749314 A CN201710749314 A CN 201710749314A CN 107343245 A CN107343245 A CN 107343245A
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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
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Abstract
The present invention discloses a kind of double PWM unit power amplifier modules of pulsewidth modulation, and power amplifier module is arranged for doubling plate, and digital power amplifier PWM pulse-width modulation circuits include the PWM power amplifier units of two groups of equities, there is provided two sets are assisted a ruler in governing a country circuit.Switching Power Supply isolating transformer circuit of the present invention connects digital power amplifier PWM pulse-width modulation circuits after on/off control circuit, and Switching Power Supply isolating transformer circuit output end is connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit, assists a ruler in governing a country the current rectifying and wave filtering circuit of power supply 1, assists a ruler in governing a country the current rectifying and wave filtering circuit of power supply 2, fan voltage current rectifying and wave filtering circuit.The power amplifier module of the present invention has perfect protection circuit, and digital power amplifier PWM pulse-width modulation circuits are distributed in layer circuit board, other to be arranged on lower circuit plate, rationally distributed, excellent in heat dissipation effect, and tonequality fidelity effect is good.
Description
Technical field
The present invention relates to a kind of power amplification device, specifically, more particularly to a kind of double PWM units pulsewidth modulation 350W+
350W 500W+500W power amplifier modules.
Background technology
For sound equipment power amplifier using very wide, power amplifier abbreviation power amplifier in life, it is mainly that source of sound equipment is defeated that it, which is acted on,
Enter after relatively small-signal is amplified, produce sufficiently large electric current and be pushed to the playback that loudspeaker carries out sound, it is by audio
The loudspeaker of audio amplifier is driven to send sound after electric signal amplification.Professional power amplifier is generally used for meeting, performance, the Room, hall, field, shop
Amplify.With output power in design, protection circuit is perfect, based on good radiating.The fine or not direct shadow of sound equipment power amplifier performance
To ring to whole audio amplifier and play the effect of tonequality, situations such as having audio distortions often, speaker power amplifier has different power at present,
Different places use the power amplifier of different capacity, how to improve the design of signal transacting in power amplifier so as to fit in various differences
The demand of occasion is to be inquired into herein.Due to considering power, impedance, distortion, dynamic and different use ranges and control
Regulatory function processed, signal transacting, the circuit of different power amplifiers internally design and produce also different in technique.Professional power amplifier
Meeting is generally used for, is performed, the Room, hall, field, shop amplifies.With output power in design, protection circuit is perfect, and good dissipates
Based on heat.
The content of the invention
The purpose of the present invention is the shortcomings that overcoming prior art, is formed using PWM pulse-width modulation circuits, power amplifier module is double
Laminate is arranged, and digital power amplifier PWM pulse-width modulation circuits (pulsewidth modulation power amplifier) include the PWM power amplifier units of two groups of equities,
There is provided two sets and assist a ruler in governing a country circuit：Assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 1, assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 2, after carrying out rectification, filtering
Output voltage, it is adapted to High-power amplifier output.
For the above-mentioned purpose, technical scheme is using a kind of double PWM units (the 350W+350W 500W of pulsewidth modulation
+ 500W) power amplifier module, implement in the following manner：
A kind of double PWM unit power amplifier modules of pulsewidth modulation of the present invention, power amplifier module are arranged for doubling plate, digital power amplifier
PWM pulse-width modulation circuits (pulsewidth modulation power amplifier) are distributed in layer circuit board (PCB), other to be arranged in lower circuit plate
On；Electromagnetic interface filter, bridge rectifier filter circuit, auto-excitation type half-bridge switch power source circuit, Switching Power Supply isolating transformer circuit according to
Secondary connection, Switching Power Supply isolating transformer circuit connect digital power amplifier PWM pulsewidth modulations electricity after on/off control circuit
Road, Switching Power Supply isolating transformer circuit output end is connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit, to assist a ruler in governing a country power supply 1 whole
Stream filter circuit, the current rectifying and wave filtering circuit of power supply 2, fan voltage current rectifying and wave filtering circuit are assisted a ruler in governing a country, assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 1 warp
Cross +/- 12V and assist a ruler in governing a country and +/- 5V is connected after the circuit of voltage 1 assist a ruler in governing a country the circuit of voltage 1, +/- 5V assists a ruler in governing a country the circuit output end of voltage 1 connection number
Word power amplifier PWM pulse-width modulation circuits, assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 1 connection+5V after+12V assists a ruler in governing a country the circuit of voltage 2 and assist a ruler in governing a country
The circuit of voltage 2；
Digital power amplifier principal voltage current rectifying and wave filtering circuit connects output power limit circuit, electric current after overcurrent sensing circuit
Circuit output end connection digital power amplifier PWM pulse-width modulation circuits are detected, digital power amplifier principal voltage current rectifying and wave filtering circuit drives by PWM
Digital power amplifier PWM pulse-width modulation circuits, the connection of digital power amplifier PWM pulse-width modulation circuits output end are connected after dynamic chip power circuit
Digital power amplifier output circuit, protection indicating circuit, digital power amplifier PWM pulse-width modulation circuits input connection signal protection circuit.
In certain embodiments, fan voltage rectification filter circuit output end connection speed regulation circuit for fan, fan speed-regulating electricity
Road connection monitoring digital power amplifier temperature circuit；
The connection AC alternating current inputs of electromagnetic interface filter input, electromagnetic interface filter output end connection bridge rectifier filter circuit,
Bridge rectifier filter circuit is selected the alternating voltage of input, bridge rectifier filter circuit output end connection auto-excitation type half-bridge
Switching power circuit, auto-excitation type half-bridge switch power source circuit carry out excess temperature/overvoltage/overcurrent protection, auto-excitation type half-bridge switch power source
Circuit output end connecting valve power isolation transformer circuit.
In certain embodiments, PWM driving chips power circuit includes plug receptacle J5B, J2B, J6B, J4B, digital power amplifier
PWM pulse-width modulation circuits include two groups of PWM power amplifier units, one group of plug receptacle J5B, J2B connection of PWM driving chip power circuits
One PWM power amplifier units, another group of plug receptacle J6B, J4B of PWM driving chip power circuits connect another PWM power amplifier units, connect
Socket J5B pin 4,5,7 connects +/- 5V boost voltages circuit 33, and plug receptacle J5B pin 3 is grounded, and plug receptacle J2B passes through
It is grounded after resistance R128A, electric capacity C114；Plug receptacle J6B pin 8 is grounded；Plug receptacle J4B passes through resistance R129A, electric capacity C115
After be grounded.
In certain embodiments, PWM driving chips power circuit (pulse-width modulation power circuit) is provided with connection upper strata electricity
The port of road plate (PCB), PWM driving chips power circuit pass through two groups of symmetrical plug receptacle J5B, J2B and plug receptacle J6B, J4B
Layer circuit board in connection；Plug receptacle J6B pin 5 connects the PNP triode Q4 of on/off control circuit emitter E, opens
The power supply that the PNP triode Q4 of the dynamic/closing control circuit +/- 12V of colelctor electrode C connections assists a ruler in governing a country the circuit of voltage 1 bears -12V, PNP
Triode Q5 colelctor electrode C connects PNP triode Q4 base stage B after resistance R187, and PNP triode Q4 base stage B passes through
It is grounded after electric capacity C144, the PNP triode Q4 Jing Yin interface MUTE of base stage B connections.
In certain embodiments, digital power amplifier PWM pulse-width modulation circuits (pulsewidth modulation power amplifier) include two groups of PWM work(
Unit is put, the pin 15 that first group of PWM power amplifier unit includes PWM pulse width modulating chip U2, chip U2 connects after resistance R39
+ B end interfaces, chip U2 pin 10, which connects +/- 12V, assists a ruler in governing a country the power supply of the circuit of voltage 1 and bears, and chip U2 pin 14 passes through resistance
NMOS tube D-FET3 grid G is connected after R27, chip U2 pin 13 connects NMOS tube D-FET3 source S and NMOS tube D-
FET4 drain D, the chip U2 output work discharge signal of pin 13, NMOS tube D-FET3 drain D connection+B end interfaces, chip U2
Pin 16 by resistance R44, diode D2 positive pole-negative pole after connect NMOS tube D-FET3 drain D, resistance R44 and electricity
Resistance R29 is in series between resistance R27；
NMOS tube D-FET3 source S connection NMOS tube D-FET4 drain D, NMOS tube D-FET4 source S connection core
Piece U2 pin 10, NMOS tube D-FET4 grid G connect chip U2 pin 11, NMOS tube D-FET4 after resistance R28
Grid G NMOS tube D-FET4 source S is connected after resistance R28, R45 and light emitting diode DS2.
In certain embodiments, first group of PWM work(of digital power amplifier PWM pulse-width modulation circuits (pulsewidth modulation power amplifier)
Put unit and be provided with thermal-shutdown circuit, the thermal-shutdown circuit of first group of PWM power amplifier unit includes PNP triode Q1, temperature-sensitive
Resistance PR1, chip U2 pin 1 are connected in parallel thermistor PR1, PNP triode Q1 emitter E, and chip U2 pin 1 passes through
Cross after thermistor PR1 and connect PNP triode Q1 base stage B, PNP triode Q1 base stage B is grounded after resistance R15；The
Two groups of PWM power amplifier units are identical with first group of PWM power amplifier unit structure.
The power amplifier module of the present invention has perfect protection circuit, and digital power amplifier PWM pulse-width modulation circuits are distributed in upper strata
Circuit board, other to be arranged on lower circuit plate, rationally distributed, excellent in heat dissipation effect, tonequality fidelity effect are good.
Brief description of the drawings
Fig. 1 show the schematic block circuit diagram of the present invention；
Fig. 2 show the electronic-circuit diagram of PWM driving chips power circuit of the present invention；
Fig. 3 show the electronic-circuit diagram of digital power amplifier PWM pulse-width modulation circuits of the present invention；
Fig. 4 show the electronic-circuit diagram of first group of PWM power amplifier unit of the invention.
Description of reference numerals is as follows：
Electromagnetic interface filter 11, bridge rectifier filter circuit 12, auto-excitation type half-bridge switch power source circuit 13, Switching Power Supply isolation
Transformer circuit 14, on/off control circuit 15, output power limit circuit 16, signal protection circuit 17, digital power amplifier is defeated
Go out circuit 18, protect indicating circuit 19, digital power amplifier principal voltage current rectifying and wave filtering circuit 21, current detection circuit 22, PWM driving cores
Piece power circuit 23, digital power amplifier PWM pulse-width modulation circuits 24 assist a ruler in governing a country the current rectifying and wave filtering circuit 31 of power supply 1, and +/- 12V assists a ruler in governing a country voltage
1 circuit 32 ,+12V assist a ruler in governing a country the circuit 33 of voltage 2, and +/- 5V assists a ruler in governing a country the circuit 34 of voltage 1, and+5V assists a ruler in governing a country the circuit 35 of voltage 2, assists a ruler in governing a country power supply 2
Current rectifying and wave filtering circuit 37, fan voltage current rectifying and wave filtering circuit 41, speed regulation circuit for fan 42, monitoring digital power amplifier temperature circuit 43.
Embodiment
For the feature of the present invention, technological means and the specific purposes reached, function can be further appreciated that, this hair is parsed
The advantages of bright and spirit, the detailed description of the present invention is further understood with embodiment by below in conjunction with accompanying drawing.
The power amplifier module of the present invention is arranged for doubling plate, (the pulsewidth modulation power amplifier electricity of digital power amplifier PWM pulse-width modulation circuits 24
Road) layer circuit board (PCB) is distributed in, it is other to be arranged on lower circuit plate；
Electromagnetic interface filter 11, bridge rectifier filter circuit 12, auto-excitation type half-bridge switch power source circuit 13, Switching Power Supply isolation
Transformer circuit 14 is sequentially connected, and bridge rectifier filter circuit 12 carries out input ac voltage selection, auto-excitation type half-bridge switch electricity
Source circuit 13 carries out excess temperature/overvoltage/overcurrent protection.
Switching Power Supply isolating transformer circuit 14 connects digital power amplifier PWM pulsewidths after on/off control circuit 15
Modulation circuit 24, the output end of Switching Power Supply isolating transformer circuit 14 are connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit
21st, assist a ruler in governing a country the current rectifying and wave filtering circuit 31 of power supply 1, assist a ruler in governing a country the current rectifying and wave filtering circuit 37 of power supply 2, fan voltage current rectifying and wave filtering circuit 41, it is auxiliary
The assistant current rectifying and wave filtering circuit 31 of power supply 1 connects +/- 5V after +/- 12V assists a ruler in governing a country the circuit 32 of voltage 1 and assists a ruler in governing a country the circuit 34 of voltage 1, +/-
5V assists a ruler in governing a country the output end of 1 circuit of voltage 34 connection digital power amplifier PWM pulse-width modulation circuits 24, assists a ruler in governing a country the current rectifying and wave filtering circuit 31 of power supply 1
Connection+5V assists a ruler in governing a country the circuit 35 of voltage 2 after+12V assists a ruler in governing a country the circuit 33 of voltage 2；
Digital power amplifier principal voltage current rectifying and wave filtering circuit 21 connects output power limit circuit after overcurrent sensing circuit 22
16, the output end of current detection circuit 22 connection digital power amplifier PWM pulse-width modulation circuit 24, digital power amplifier principal voltage rectifying and wave-filtering electricity
Road 21 connects digital power amplifier PWM pulse-width modulation circuits 24, digital power amplifier PWM pulsewidths after PWM driving chips power circuit 23
The output end of modulation circuit 24 connection digital power amplifier output circuit 18, protection indicating circuit 19, digital power amplifier PWM pulse-width modulation circuits
24 inputs connection signal protection circuit 17.
Signal protection circuit 17：Signal amplification/patten transformation/buffer protection is carried out, and receiving channel 1-2 power amplifier signals are defeated
Enter；Digital power amplifier output circuit 18 can be filtered/detect/energy regenerating, and provide the output of passage 1-2 power amplifiers；Protection instruction
Circuit 19 provides direct current/excess temperature/excessively stream/overvoltage protection, output protection instruction.
+/- 12V, which assists a ruler in governing a country the circuit 32 of voltage 1 and provides +/- 12V, assists a ruler in governing a country voltage output 1；+ 12V assist a ruler in governing a country the circuit 33 of voltage 2 provide+
12V assists a ruler in governing a country voltage output 2 (optional)；+ 5V, which assists a ruler in governing a country the circuit 35 of voltage 2 and provides+5V, assists a ruler in governing a country voltage output 2 (optional)；Assist a ruler in governing a country
The current rectifying and wave filtering circuit 37 of power supply 2 provides+48V outputs (optional).
The connection AC alternating current inputs of the input of electromagnetic interface filter 11, the output end of electromagnetic interface filter 11 connection bridge-type rectifying and wave-filtering electricity
Road 12, bridge rectifier filter circuit 12 are selected the alternating voltage of input, the connection of the output end of bridge rectifier filter circuit 12
Auto-excitation type half-bridge switch power source circuit 13, auto-excitation type half-bridge switch power source circuit 13 carry out excess temperature/overvoltage/overcurrent protection (direct current
Protection module -- DC deflection, thermistor, power is limited, current limliting, is alarmed, shutdown；Overheat protector module -- hiccup protections-drop
Warm self-starting, Reset protections-electrification reset, software or manual reset), the output end of auto-excitation type half-bridge switch power source circuit 13 connects
Connect Switching Power Supply isolating transformer circuit 14.
The output signal of digital power amplifier output circuit 18 is filtered/detected/energy regenerating simultaneously.
The output end of fan voltage current rectifying and wave filtering circuit 41 connects speed regulation circuit for fan 42, the connection monitoring of speed regulation circuit for fan 42
Digital power amplifier temperature circuit 43.
PWM driving chips power circuit 23 includes plug receptacle J5B, J2B, J6B, J4B, digital power amplifier PWM pulsewidth modulations electricity
Road 24 includes two groups of PWM power amplifier units, and one group of plug receptacle J5B, J2B of PWM driving chips power circuit 23 connect a PWM power amplifiers
Unit, another group of plug receptacle J6B, J4B of PWM driving chips power circuit 23 connect another PWM power amplifier units, plug receptacle J5B
Pin 4,5,7 connect +/- 5V boost voltages circuit 33, plug receptacle J5B pin 3 is grounded, and plug receptacle J2B passes through resistance
It is grounded after R128A, electric capacity C114；Plug receptacle J6B pin 8 is grounded；Plug receptacle J4B is followed by by resistance R129A, electric capacity C115
Ground.
PWM driving chips power circuit 23 (pulse-width modulation power circuit) is provided with the end of the upper layer circuit board (PCB) of connection
Mouthful, PWM driving chips power circuit 23 passes through layer circuit board on two groups of plug receptacles J5B, J2B and plug receptacle J6B, J4B connection.
Plug receptacle J6B pin 5 connects the PNP triode Q4 of on/off control circuit 15 emitter E, startup/pass
The +/- 12V of colelctor electrode C connections for closing the PNP triode Q4 of control circuit 15 assists a ruler in governing a country the power supply negative -12V, PNP tri- of the circuit 32 of voltage 1
Pole pipe Q5 colelctor electrode C connects PNP triode Q4 base stage B after resistance R187, and PNP triode Q4 base stage B is by electricity
It is grounded after holding C144, the PNP triode Q4 Jing Yin interface MUTE of base stage B connections.
Digital power amplifier PWM pulse-width modulation circuits 24 (pulsewidth modulation power amplifier) include the PWM power amplifier units of two groups of equities,
The pin 15 that first group of PWM power amplifier unit includes PWM pulse width modulating chip U2, chip U2 connection+B after resistance R39 is terminated
Mouthful, chip U2 pin 10, which connects +/- 12V, assists a ruler in governing a country the power supply of the circuit 32 of voltage 1 and bears, and chip U2 pin 14 is by resistance R27
NMOS tube D-FET3 grid G is connected afterwards, and chip U2 pin 13 connects NMOS tube D-FET3 source S and NMOS tube D-FET4
Drain D, the chip U2 output work discharge signal of pin 13, NMOS tube D-FET3 drain D connection+B end interfaces, chip U2's draws
Pin 16 by resistance R44, diode D2 positive pole-negative pole after connect NMOS tube D-FET3 drain D, resistance R44 and resistance R27
Between be in series with resistance R29.
NMOS tube D-FET3 source S connection NMOS tube D-FET4 drain D, NMOS tube D-FET4 source S connection core
Piece U2 pin 10, NMOS tube D-FET4 grid G connect chip U2 pin 11, NMOS tube D-FET4 after resistance R28
Grid G NMOS tube D-FET4 source S is connected after resistance R28, R45 and light emitting diode DS2.
First group of PWM power amplifier unit of digital power amplifier PWM pulse-width modulation circuits 24 (pulsewidth modulation power amplifier) is provided with
Thermal-shutdown circuit, the thermal-shutdown circuit of first group of PWM power amplifier unit include PNP triode Q1, thermistor PR1, chip
U2 pin 1 is connected in parallel thermistor PR1, PNP triode Q1 emitter E, and chip U2 pin 1 passes through thermistor
PNP triode Q1 base stage B is connected after PR1, PNP triode Q1 base stage B is grounded after resistance R15；Second group of PWM power amplifier
Unit is identical with first group of PWM power amplifier unit structure.
Embodiment described above only expresses some embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore limitation of the scope of the invention can not be interpreted as.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.Therefore, protection scope of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of double PWM unit power amplifier modules of pulsewidth modulation, power amplifier module are arranged for doubling plate, digital power amplifier PWM pulsewidth modulations
Circuit (24) is distributed in layer circuit board, other to be arranged on lower circuit plate；Electromagnetic interface filter (11), bridge rectifier filtered electrical
Road (12), auto-excitation type half-bridge switch power source circuit (13), Switching Power Supply isolating transformer circuit (14) are sequentially connected, and its feature exists
In Switching Power Supply isolating transformer circuit (14) connects digital power amplifier PWM pulsewidths tune after on/off control circuit (15)
Circuit (24) processed, Switching Power Supply isolating transformer circuit (14) output end are connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit
(21), assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 1 (31), assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 2 (37), fan voltage current rectifying and wave filtering circuit
(41), assist a ruler in governing a country the current rectifying and wave filtering circuit of power supply 1 (31) and connect +/- 5V after +/- 12V assists a ruler in governing a country the circuit of voltage 1 (32) and assist a ruler in governing a country voltage 1
Circuit (34), +/- 5V assist a ruler in governing a country the circuit of voltage 1 (34) output end connection digital power amplifier PWM pulse-width modulation circuits (24), assist a ruler in governing a country power supply
1 current rectifying and wave filtering circuit (31) connection+5V after+12V assists a ruler in governing a country the circuit of voltage 2 (33) assists a ruler in governing a country the circuit of voltage 2 (35)；
Digital power amplifier principal voltage current rectifying and wave filtering circuit (21) connects output power limit circuit after overcurrent sensing circuit (22)
(16), current detection circuit (22) output end connection digital power amplifier PWM pulse-width modulation circuits (24), digital power amplifier principal voltage rectification
Filter circuit (21) connects digital power amplifier PWM pulse-width modulation circuits (24) after PWM driving chips power circuit (23), numeral
Power amplifier PWM pulse-width modulation circuits (24) output end connection digital power amplifier output circuit (18), protection indicating circuit (19), digital work(
Put PWM pulse-width modulation circuits (24) input connection signal protection circuit (17).
A kind of 2. double PWM unit power amplifier modules of pulsewidth modulation according to claim 1, it is characterised in that the fan electricity
Press current rectifying and wave filtering circuit (41) output end connection speed regulation circuit for fan (42), speed regulation circuit for fan (42) connection monitoring digital power amplifier
Temperature circuit (43)；
The connection AC alternating current inputs of electromagnetic interface filter (11) input, electromagnetic interface filter (11) output end connection bridge-type rectifying and wave-filtering electricity
Road (12), bridge rectifier filter circuit (12) output end connection auto-excitation type half-bridge switch power source circuit (13), auto-excitation type half-bridge are opened
Powered-down source circuit (13) output end connecting valve power isolation transformer circuit (14).
A kind of 3. double PWM unit power amplifier modules of pulsewidth modulation according to claim 1, it is characterised in that the PWM drivings
Chip power circuit (23) includes plug receptacle J5B, J2B, J6B, J4B, and digital power amplifier PWM pulse-width modulation circuits (24) include two groups
PWM power amplifier units, one group of plug receptacle J5B, J2B of PWM driving chips power circuit (23) connect a PWM power amplifier units, and PWM drives
Another PWM power amplifier units of another group of plug receptacle J6B, J4B connection of dynamic chip power circuit (23), plug receptacle J5B pin 4,
5th, the 7 +/- 5V boost voltages circuit (33) of connection, plug receptacle J5B pin 3 are grounded, and plug receptacle J2B is by resistance R128A, electric capacity
It is grounded after C114；Plug receptacle J6B pin 8 is grounded；Plug receptacle J4B is grounded after resistance R129A, electric capacity C115.
A kind of 4. double PWM unit power amplifier modules of pulsewidth modulation according to claim 3, it is characterised in that the PWM drivings
Chip power circuit (23) is provided with the port of the upper layer circuit board of connection, and PWM driving chips power circuit (23) passes through two groups pairs
Layer circuit board on plug receptacle J5B, J2B and J6B of title, J4B connections；
Plug receptacle J6B pin 5 connects the PNP triode Q4 of on/off control circuit (15) emitter E, on/off
The power supply that the PNP triode Q4 of control circuit (15) the +/- 12V of colelctor electrode C connections assists a ruler in governing a country the circuit of voltage 1 (32) bears -12V, PNP
Triode Q5 colelctor electrode C connects PNP triode Q4 base stage B after resistance R187, and PNP triode Q4 base stage B passes through
It is grounded after electric capacity C144, the PNP triode Q4 Jing Yin interface MUTE of base stage B connections.
A kind of 5. double PWM unit power amplifier modules of pulsewidth modulation according to claim 1, it is characterised in that the digital work(
Put PWM pulse-width modulation circuits (24) and include two groups of PWM power amplifier units, first group of PWM power amplifier unit includes PWM pulse width modulating chips
U2, chip U2 pin 15 connection+B end interfaces after resistance R39, chip U2 pin 10 connect +/- 12V and assist a ruler in governing a country voltage 1
The power supply of circuit (32) is born, and chip U2 pin 14 connects NMOS tube D-FET3 grid G after resistance R27, chip U2's
Pin 13 connects NMOS tube D-FET3 source S and NMOS tube D-FET4 drain D, and chip U2 pin 13 exports power amplifier letter
Number, NMOS tube D-FET3 drain D connection+B end interfaces, the chip U2 process resistance of pin 16 R44, diode D2 positive pole-
NMOS tube D-FET3 drain D is connected after negative pole, resistance R29 is in series between resistance R44 and resistance R27；
NMOS tube D-FET3 source S connection NMOS tube D-FET4 drain D, NMOS tube D-FET4 source S connection chip U2
Pin 10, NMOS tube D-FET4 grid G connects chip U2 pin 11, NMOS tube D-FET4 grid after resistance R28
Pole G connects NMOS tube D-FET4 source S after resistance R28, R45 and light emitting diode DS2.
A kind of 6. double PWM unit power amplifier modules of pulsewidth modulation according to claim 5, it is characterised in that the digital work(
First group of PWM power amplifier unit for putting PWM pulse-width modulation circuits (24) is provided with thermal-shutdown circuit, first group of PWM power amplifier unit
Thermal-shutdown circuit include PNP triode Q1, thermistor PR1, chip U2 pin 1 be connected in parallel thermistor PR1,
PNP triode Q1 emitter E, chip U2 pin 1 connect PNP triode Q1 base stage B, PNP after thermistor PR1
Triode Q1 base stage B is grounded after resistance R15；Second group of PWM power amplifier unit and first group of PWM power amplifier unit structure phase
Together.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710749314.5A CN107343245B (en) | 2017-08-28 | 2017-08-28 | Pulse width modulation double PWM unit power amplifier module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710749314.5A CN107343245B (en) | 2017-08-28 | 2017-08-28 | Pulse width modulation double PWM unit power amplifier module |
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| CN107343245A true CN107343245A (en) | 2017-11-10 |
| CN107343245B CN107343245B (en) | 2023-12-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112637744A (en) * | 2020-12-30 | 2021-04-09 | 东莞精恒电子有限公司 | Power amplifier system of high-power 6000W digital power amplifier |
| CN112660086A (en) * | 2020-12-08 | 2021-04-16 | 太原工业学院 | Electro-hydraulic brake-by-wire system |
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| CN112637744A (en) * | 2020-12-30 | 2021-04-09 | 东莞精恒电子有限公司 | Power amplifier system of high-power 6000W digital power amplifier |
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