CN107396245A - A kind of pulsewidth modulation 700W+700W (PFC) power amplifier module - Google Patents
A kind of pulsewidth modulation 700W+700W (PFC) power amplifier module Download PDFInfo
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- CN107396245A CN107396245A CN201710744098.5A CN201710744098A CN107396245A CN 107396245 A CN107396245 A CN 107396245A CN 201710744098 A CN201710744098 A CN 201710744098A CN 107396245 A CN107396245 A CN 107396245A
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/007—Protection circuits for transducers
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Acoustics & Sound (AREA)
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Abstract
The present invention discloses a kind of pulsewidth modulation 700W+700W (PFC) power amplifier module, and containing PFC circuit of power factor correction, PWM pulse-width modulation circuits, PFC circuit of power factor correction improves the ability of power supply active power of output.Electromagnetic interface filter output end of the present invention connects PFC circuit of power factor correction, PFC circuit of power factor correction output end connects bridge rectifier filter circuit, Switching Power Supply isolating transformer circuit 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.The PFC circuit of power factor correction of power amplifier module of the present invention has ensured the stability ability of output power of power supply, 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 power amplifier module of pulsewidth modulation.
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, using PFC power
Factor correcting circuit, PWM pulse-width modulation circuits are formed, and PFC circuit of power factor correction improves the energy of power supply active power of output
Power, PWM carry out rectifying and wave-filtering to principal voltage, and power amplifier module is arranged for doubling plate, digital power amplifier PWM pulse-width modulation circuit (pulsewidths
Modulate power amplifier) comprising two groups of reciprocity PWM power amplifier units, there is provided two sets are assisted a ruler in governing a country circuit：Assist a ruler in governing a country the rectifying and wave-filtering of power supply 1 electricity
Road, the current rectifying and wave filtering circuit of power supply 2 is assisted a ruler in governing a country, carry out output voltage after rectification, filtering, be adapted to High-power amplifier output.
For the above-mentioned purpose, a kind of pulsewidth modulation 700W+700W (PFC) power amplifier module of the invention, using following skill
Art scheme：
A kind of pulsewidth modulation 700W+700W (PFC) power amplifier module of the present invention, power amplifier module are arranged for doubling plate, numeral
Power amplifier PWM pulse-width modulation circuits 24 (pulsewidth modulation power amplifier) are distributed in layer circuit board (PCB), other to be arranged in lower floor's electricity
On road plate (PCB)；The output end of electromagnetic interface filter 11 connection PFC circuit of power factor correction 20, PFC circuit of power factor correction 20
Output end connects bridge rectifier filter circuit 12, and bridge rectifier filter circuit 12 is after auto-excitation type half-bridge switch power source circuit 13
Connecting valve power isolation transformer circuit 14 is sequentially connected, and Switching Power Supply isolating transformer circuit 14 passes through on/off control
Digital power amplifier PWM pulse-width modulation circuits 24 are connected after circuit 15 processed, the output end of Switching Power Supply isolating transformer circuit 14 is in parallel even
Digital power amplifier principal voltage current rectifying and wave filtering circuit 21 is connect, the current rectifying and wave filtering circuit 31 of power supply 1 is assisted a ruler in governing a country, assists a ruler in governing a country the current rectifying and wave filtering circuit of power supply 2
37th, fan voltage current rectifying and wave filtering circuit 41；
Assist a ruler in governing a country the current rectifying and wave filtering circuit 31 of power supply 1 and connect +/- 5V after +/- 12V assists a ruler in governing a country the circuit 32 of voltage 1 and assist a ruler in governing a country voltage 1
Circuit 34, +/- 5V assist 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, assist a ruler in governing a country the rectification of power supply 1
Connection+the 5V after+12V assists a ruler in governing a country the circuit 33 of voltage 2 of filter circuit 31 assists a ruler in governing a country the circuit 35 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.
In certain embodiments, the output end of fan voltage current rectifying and wave filtering circuit 41 connection speed regulation circuit for fan 42, fan are adjusted
The fast connection of circuit 42 monitoring digital power amplifier temperature circuit 43；
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, self-excitation
The output end connecting valve power isolation transformer circuit 14 of formula half-bridge switch power source circuit 13.
In certain embodiments, PFC circuit of power factor correction 20 includes chip U3, connector CN9, connector CN11,
The the 1st, 2 of connector CN9 connection power supply bears VEE, connector CN9 the 3rd, 4 bit serials, connector CN11 the 1st, 2 bit strings
Connection, chip U3 pin 1 connect VEE, and chip U3 pin 4 connects the 2nd of connector CN11, and chip U3 pin 3 passes through
The 1st of connector CN11 is connected after resistance R11, chip U3 pin 8 connects the 3rd of connector CN9；
Chip U3 pin 6 passes through resistance R18, R10, R46 successively, is formed one time after diode D22 negative pole, positive pole
Road；
The 4th of diode D22 positive pole connection connector CN9, light emitting diode DS3 negative pole connection power supply bear VEE,
The PWM that chip U3 pin 8 is PFC drives output interface (the voltage output interface as PFC circuit of power factor correction 20)；
Chip U3 pin 7 is PFC driving currents power supply interface (current terminal as PFC circuit of power factor correction 20)；
Chip U3 pin 2 connects VEE after electric capacity C37, and chip U3 pin 4 is by electric capacity C30 in parallel, resistance
VEE is connected after R29.
In certain embodiments, digital power amplifier PWM pulse-width modulation circuits 24 (pulsewidth modulation power amplifier) include two groups of PWM
Power amplifier unit, the pin 15 that first group of PWM power amplifier unit includes PWM pulse width modulating chip U2, chip U2 connect after resistance R39
+ B end interfaces are connect, chip U2 pin 10 connects-B end interfaces, and chip U2 pin 14 connects NMOS tube after resistance R27
FDP53 grid G, chip U2 pin 13 connect NMOS tube FDP53 source S and NMOS tube FDP54 drain D, chip U2
The output work discharge signal of pin 13, NMOS tube FDP53 drain D connection+B end interfaces, chip U2 pin 16 passes through resistance
R44, diode D2 positive pole-negative pole after connect NMOS tube FDP53 drain D, be in series with electricity between resistance R44 and resistance R27
Hinder R29；
NMOS tube FDP53 source S connection NMOS tube FDP54 drain D, NMOS tube FDP54 source S connection chip U2
Pin 10, NMOS tube FDP54 grid G connects chip U2 pin 11, NMOS tube FDP54 grid G after resistance R28
NMOS tube FDP54 source S is connected after resistance R28, R45 and light emitting diode DS2.
In certain embodiments, first group of PWM of digital power amplifier PWM pulse-width modulation circuits 24 (pulsewidth modulation power amplifier)
Power amplifier unit is provided with thermal-shutdown circuit, and the thermal-shutdown circuit of first group of PWM power amplifier unit includes PNP triode Q1, heat
Quick resistance PR1, chip U2 pin 1 are connected in parallel thermistor PR1, PNP triode Q1 emitter E, chip U2 pin 1
PNP triode Q1 base stage B is connected after thermistor 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.
The PFC circuit of power factor correction of power amplifier module of the present invention has ensured the stability ability of output power of power supply, number
Word power amplifier PWM pulse-width modulation circuits (pulsewidth modulation power amplifier) are distributed in layer circuit board, power amplification output circuit output signal
/ energy regenerating is filtered/detects simultaneously, tonequality fidelity effect is good.
Brief description of the drawings
Fig. 1 show the circuit theory diagrams of the present invention；
Fig. 2 show the electronic-circuit diagram of PFC circuit of power factor correction 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, PFC circuit of power factor correction 20, digital power amplifier principal voltage current rectifying and wave filtering circuit 21, electricity
Current detection circuit 22, PWM driving chips power circuit 23, digital power amplifier PWM pulse-width modulation circuits 24, assist a ruler in governing a country the rectification of power supply 1 filter
Wave circuit 31, +/- 12V assist a ruler in governing a country the circuit 32 of voltage 1, and+12V assists 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 is auxiliary
The circuit 35 of voltage 2 is helped, assists 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, speed regulation circuit for fan 42,
Monitor 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 is distributed in, it is other to be arranged on lower circuit plate；
Electromagnetic interface filter 11, PFC circuit of power factor correction 20, bridge rectifier filter circuit 12, auto-excitation type half-bridge switch electricity
Source circuit 13, Switching Power Supply isolating transformer circuit 14 are sequentially connected, the output end of electromagnetic interface filter 11 connection PFC power factors school
Positive circuit 20, the output end of PFC circuit of power factor correction 20 connection bridge rectifier filter circuit 12, bridge rectifier filter circuit 12
Connecting valve power isolation transformer circuit 14 is sequentially connected after auto-excitation type half-bridge switch power source circuit 13, Switching Power Supply every
Digital power amplifier PWM pulse-width modulation circuits 24, Switching Power Supply are connected after on/off control circuit 15 from transformer circuit 14
The output end of isolating transformer circuit 14 is connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit 21, assists a ruler in governing a country the rectifying and wave-filtering of power supply 1
Circuit 31, the current rectifying and wave filtering circuit 37 of power supply 2, fan voltage current rectifying and wave filtering circuit 41 are assisted a ruler in governing a country, assist a ruler in governing a country the current rectifying and wave filtering circuit 31 of power supply 1
+/- 5V is connected 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 circuit 34 of voltage 1 and exported
End connection digital power amplifier PWM pulse-width modulation circuits 24, assist a ruler in governing a country the process+12V of 1 current rectifying and wave filtering circuit of power supply 31 and assist a ruler in governing a country the circuit of voltage 2
Connection+5V assists a ruler in governing a country the circuit 35 of voltage 2 after 33；
Auto-excitation type half-bridge switch power source circuit 13 carries out excess temperature/overvoltage/overcurrent protection, and signal protection circuit 17 is put
Greatly/patten transformation/buffer protection, digital power amplifier output circuit 18 are used as filtering/detection/energy regenerating, protect indicating circuit 19
Carry out direct current/excess temperature/excessively stream/overvoltage protection.
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：/ patten transformation/buffer protection is amplified, and receiving channel 1-2 power amplifiers signal inputs；
Digital power amplifier output circuit 18 can be filtered/detect/energy regenerating, and provide the output of passage 1-2 power amplifiers；Protect indicating circuit
19 provide 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 25 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.
PFC circuit of power factor correction 20 includes chip U3, connector CN9, the 1st, the 2 of connector CN11, connector CN9
Position connection power supply bear VEE, connector CN9 the 3rd, 4 bit serials, connector CN11 the 1st, 2 bit serials, chip U3 pin 1
VEE is connected, chip U3 pin 4 connects the 2nd of connector CN11, and chip U3 pin 3 patches after resistance R11
The 1st of part CN11, chip U3 pin 8 connect the 3rd of connector CN9；
Chip U3 pin 6 passes through resistance R18, R10, R46 successively, is formed one time after diode D22 negative pole, positive pole
Road；
The 4th of diode D22 positive pole connection connector CN9, light emitting diode DS3 negative pole connection power supply bear VEE,
The PWM drivings output that chip U3 pin 8 is PFC (is numeral for the output voltage interface of PFC circuit of power factor correction 20
Power amplifier PWM pulse-width modulation circuits 24 provide control source)；Chip U3 pin 7 is PFC driving currents feeder ear (for PFC power
The current interface of factor correcting circuit 20, electric current input is provided for digital power amplifier PWM pulse-width modulation circuits 24)；
Chip U3 pin 2 connects VEE after electric capacity C37, and chip U3 pin 4 is by electric capacity C30 in parallel, resistance
VEE is connected after R29.
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 connects-B end interfaces, and chip U2 pin 14 connects NMOS tube FDP53 grid after resistance R27
Pole G, chip U2 pin 13 connect NMOS tube FDP53 source S and NMOS tube FDP54 drain D, and chip U2 pin 13 is defeated
Go out power amplifier signal, NMOS tube FDP53 drain D connection+B end interfaces, chip U2 pin 16 is by resistance R44, diode D2
Positive pole-negative pole after connect NMOS tube FDP53 drain D, resistance R29 is in series between resistance R44 and resistance R27.
NMOS tube FDP53 source S connection NMOS tube FDP54 drain D, NMOS tube FDP54 source S connection chip U2
Pin 10, NMOS tube FDP54 grid G connects chip U2 pin 11, NMOS tube FDP54 grid G after resistance R28
NMOS tube FDP54 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.
Claims (5)
1. a kind of pulsewidth modulation 700W+700W (PFC) power amplifier module, includes electromagnetic interface filter 11, it is characterised in that the EMI filters
The output end of ripple device 11 connection PFC circuit of power factor correction 20, the output end of PFC circuit of power factor correction 20 connection bridge rectifier
Filter circuit 12, the connecting valve isolated from power after auto-excitation type half-bridge switch power source circuit 13 of bridge rectifier filter circuit 12 become
Transformer circuits 14 are sequentially connected, and Switching Power Supply isolating transformer circuit 14 connects numeral after on/off control circuit 15
Power amplifier PWM pulse-width modulation circuits 24, it is whole that the output end of Switching Power Supply isolating transformer circuit 14 is connected in parallel digital power amplifier principal voltage
Stream filter circuit 21, 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 rectifying and wave-filtering
Circuit 41, assist a ruler in governing a country the current rectifying and wave filtering circuit 31 of power supply 1 +/- 5V is connected after +/- 12V assists a ruler in governing a country the circuit 32 of voltage 1 and assist a ruler in governing a country the electricity of voltage 1
Road 34, +/- 5V assist 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, assist a ruler in governing a country the rectification of power supply 1 filter
Connection+the 5V after+12V assists a ruler in governing a country the circuit 33 of voltage 2 of wave circuit 31 assists a ruler in governing a country the circuit 35 of voltage 2；
Digital power amplifier principal voltage current rectifying and wave filtering circuit 21 connects output power limit circuit 16 after overcurrent sensing circuit 22, electricity
The output end of current detection circuit 22 connection digital power amplifier PWM pulse-width modulation circuits 24, digital power amplifier principal voltage current rectifying and wave filtering circuit 21
Digital power amplifier PWM pulse-width modulation circuits 24, digital power amplifier PWM pulsewidth modulations are connected after PWM driving chips power circuit 23
The output end of circuit 24 connection digital power amplifier output circuit 18, protection indicating circuit 19, digital power amplifier PWM pulse-width modulation circuits 24 are defeated
Enter end connection signal protection circuit 17.
A kind of 2. pulsewidth modulation 700W+700W (PFC) power amplifier module according to claim 1, it is characterised in that the wind
The output end of voltage of fan current rectifying and wave filtering circuit 41 connects speed regulation circuit for fan 42, the connection monitoring digital power amplifier temperature of speed regulation circuit for fan 42
Spend circuit 43；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
Circuit 12, the output end of bridge rectifier filter circuit 12 connection auto-excitation type half-bridge switch power source circuit 13, auto-excitation type half-bridge switch electricity
The output end connecting valve power isolation transformer circuit 14 of source circuit 13.
3. a kind of pulsewidth modulation 700W+700W (PFC) power amplifier module according to claim 1, it is characterised in that described
PFC circuit of power factor correction 20 includes chip U3, connector CN9, connector CN11, connector CN9 the 1st, 2 connection electricity
VEE is born in source, connector CN9 the 3rd, 4 bit serials, connector CN11 the 1st, 2 bit serials, chip U3 pin 1 connects VEE,
Chip U3 pin 4 connects the 2nd of connector CN11, and chip U3 pin 3 connects connector CN11's after resistance R11
1st, chip U3 pin 8 connects the 3rd of connector CN9；
Chip U3 pin 6 passes through resistance R18, R10, R46 successively, and primary Ioops are formed after diode D22 negative pole, positive pole；
The 4th of diode D22 positive pole connection connector CN9, light emitting diode DS3 negative pole connection power supply bear VEE, chip
U3 pin 8 is the driving output interface of PFC circuit of power factor correction 20, and chip U3 pin 7 is PFC PFCs
The power supply interface of circuit 20；
Chip U3 pin 2 connects VEE after electric capacity C37, and chip U3 pin 4 is by electric capacity C30, resistance R29 in parallel
After connect VEE.
A kind of 4. pulsewidth modulation 700W+700W (PFC) power amplifier module according to claim 1, it is characterised in that the number
Word power amplifier PWM pulse-width modulation circuits 24 include two groups of PWM power amplifier units, and first group of PWM power amplifier unit includes PWM pulsewidth modulation cores
Piece U2, chip U2 pin 15 connection+B end interfaces after resistance R39, chip U2 pin 10 connect-B end interfaces, chip
U2 pin 14 connects NMOS tube FDP53 grid G after resistance R27, and chip U2 pin 13 connects NMOS tube FDP53's
Source S and NMOS tube FDP54 drain D, the chip U2 output work discharge signal of pin 13, NMOS tube FDP53 drain D connection+B
End interface, chip U2 pin 16 by resistance R44, diode D2 positive pole-negative pole after connect NMOS tube FDP53 drain D,
Resistance R29 is in series between resistance R44 and resistance R27；
NMOS tube FDP53 source S connection NMOS tube FDP54 drain D, NMOS tube FDP54 source S connection chip U2's draws
Pin 10, NMOS tube FDP54 grid G connect chip U2 pin 11 after resistance R28, and NMOS tube FDP54 grid G is passed through
NMOS tube FDP54 source S is connected after resistance R28, R45 and light emitting diode DS2.
A kind of 5. pulsewidth modulation 700W+700W (PFC) power amplifier module according to claim 4, it is characterised in that the number
First group of PWM power amplifier unit of word power amplifier PWM pulse-width modulation circuits 24 is provided with thermal-shutdown circuit, first group of PWM power amplifier list
The thermal-shutdown circuit of member includes 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 is identical with first group of PWM power amplifier unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744098.5A CN107396245B (en) | 2017-08-25 | 2017-08-25 | Pulse width modulation 700W+700W (PFC) power amplifier module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710744098.5A CN107396245B (en) | 2017-08-25 | 2017-08-25 | Pulse width modulation 700W+700W (PFC) power amplifier module |
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| Publication Number | Publication Date |
|---|---|
| CN107396245A true CN107396245A (en) | 2017-11-24 |
| CN107396245B CN107396245B (en) | 2023-12-22 |
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Cited By (1)
| 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 |
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