CN207304890U - 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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- CN207304890U CN207304890U CN201721082598.9U CN201721082598U CN207304890U CN 207304890 U CN207304890 U CN 207304890U CN 201721082598 U CN201721082598 U CN 201721082598U CN 207304890 U CN207304890 U CN 207304890U
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- 230000000694 effects Effects 0.000 abstract description 5
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Abstract
The utility model 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 assist circuit.The utility model 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 1 current rectifying and wave filtering circuit of power supply, assists 2 current rectifying and wave filtering circuit of power supply, fan voltage current rectifying and wave filtering circuit.The power amplifier module of the utility model 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
A kind of power amplification device is the utility model is related to, specifically, more particularly to a kind of double PWM units pulsewidth modulations
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 speaker is driven to make a 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 heat dissipation.The fine or not direct shadow of sound equipment power amplifier performance
Situations such as ringing to whole speaker and play the effect of tonequality, 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 processing 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 scopes and control
Regulatory function processed, different power amplifiers design and produce also different in technique in internal signal processing, circuit.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.
Utility model content
The purpose of the utility model is to overcome the shortcomings that the prior art, formed using PWM pulse-width modulation circuits, power amplifier module
Arrange for doubling plate, digital power amplifier PWM pulse-width modulation circuits (pulsewidth modulation power amplifier) include the PWM power amplifier lists of two groups of equities
Member, there is provided two sets assist circuit：Assist 1 current rectifying and wave filtering circuit of power supply, assist 2 current rectifying and wave filtering circuit of power supply, carry out rectification, filtering
Output voltage afterwards, is adapted to High-power amplifier output.
In order to achieve the above object, the technical solution of the utility model is using a kind of double PWM units (350W+350W of pulsewidth modulation
500W+500W) power amplifier module, implements in the following manner：
A kind of double PWM unit power amplifier modules of pulsewidth modulation of the utility model, power amplifier module are arranged for doubling plate, digital work(
Put PWM pulse-width modulation circuits (pulsewidth modulation power amplifier) and be distributed in layer circuit board (PCB), it is 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 power supply 1 whole
Stream filter circuit, assist 2 current rectifying and wave filtering circuit of power supply, fan voltage current rectifying and wave filtering circuit, assists 1 current rectifying and wave filtering circuit of power supply warp
Cross +/- 12V and assist and +/- 5V is connected after 1 circuit of voltage assist 1 circuit of voltage, +/- 5V assists 1 circuit output end of voltage connection number
Word power amplifier PWM pulse-width modulation circuits, assist 1 current rectifying and wave filtering circuit of power supply connection+5V after+12V assists 2 circuit of voltage and assist
2 circuit of voltage；
Digital power amplifier principal voltage current rectifying and wave filtering circuit connects output power limit circuit, electric current after overcurrent sensing circuit
Detection circuit output terminal connects digital power amplifier PWM pulse-width modulation circuits, and 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 terminal are connected after dynamic chip power circuit
Digital power amplifier output circuit, protection indicating circuit, digital power amplifier PWM pulse-width modulation circuits input terminal 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 terminal, electromagnetic interface filter output terminal connection bridge rectifier filter circuit,
Bridge rectifier filter circuit makes choice the alternating voltage of input, bridge rectifier filter circuit output terminal 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
The pin 4,5,7 of socket J5B connects +/- 5V boost voltages circuit 33, and the pin 3 of plug receptacle J5B is grounded, and plug receptacle J2B passes through
It is grounded after resistance R128A, capacitance C114；The pin 8 of plug receptacle J6B is grounded；Plug receptacle J4B passes through resistance R129A, capacitance C115
After be grounded.
In certain embodiments, PWM driving chips power circuit (pulse-width modulation power circuit) is equipped 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；The pin 5 of plug receptacle J6B connects the emitter E of the PNP triode Q4 of on/off control circuit, opens
The power supply that the +/- 12V of collector C connections of the PNP triode Q4 of dynamic/closing control circuit assists 1 circuit of voltage bears -12V, PNP
The collector C of triode Q5 connects the base stage B of PNP triode Q4 after resistance R187, and the base stage B of PNP triode Q4 passes through
It is grounded after capacitance C144, the mute interface MUTE of base stage B connections of PNP triode Q4.
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, the pin 10 of chip U2, which connects +/- 12V and assists the power supply of 1 circuit of voltage, to be born, and the pin 14 of chip U2 passes through resistance
The grid G of NMOS tube D-FET3 is connected after R27, the pin 13 of chip U2 connects the source S and NMOS tube D- of NMOS tube D-FET3
The drain D of FET4, the 13 output work discharge signal of pin of chip U2, the drain D connection+B end interfaces of NMOS tube D-FET3, chip U2
Pin 16 by resistance R44, diode D2 cathode-anode after connect the drain D of NMOS tube D-FET3, resistance R44 and electricity
Resistance R29 is in series between resistance R27；
The drain D of the source S connection NMOS tube D-FET4 of NMOS tube D-FET3, the source S connection core of NMOS tube D-FET4
The pin 10 of piece U2, the grid G of NMOS tube D-FET4 connect the pin 11 of chip U2, NMOS tube D-FET4 after resistance R28
Grid G the source S of NMOS tube D-FET4 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 equipped with thermal-shutdown circuit, the thermal-shutdown circuit of first group of PWM power amplifier unit includes PNP triode Q1, temperature-sensitive
The pin 1 of resistance PR1, chip U2 are connected in parallel thermistor PR1, the emitter E of PNP triode Q1, and the pin 1 of chip U2 passes through
Cross after thermistor PR1 and connect the base stage B of PNP triode Q1, the base stage B of PNP triode Q1 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 utility model has perfect protection circuit, and digital power amplifier PWM pulse-width modulation circuits are distributed in
Upper layer 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 utility model；
Fig. 2 show the electronic-circuit diagram of the utility model PWM driving chip power circuits；
Fig. 3 show the electronic-circuit diagram of the utility model digital power amplifier PWM pulse-width modulation circuits；
Fig. 4 show the electronic-circuit diagram of first group of PWM power amplifier unit of the utility model.
The reference numerals are 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 1 current rectifying and wave filtering circuit 31 of power supply, and +/- 12V assists voltage
1 circuit 32 ,+12V assist 2 circuit 33 of voltage, and +/- 5V assists 1 circuit 34 of voltage, and+5V assists 2 circuit 35 of voltage, assists 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 that can further appreciate that the feature of the utility model, technological means and the specific purposes reached, function, parsing
The advantages of the utility model and spirit, by below in conjunction with attached drawing and embodiment the detailed description of the utility model is obtained into
The understanding of one step.
The power amplifier module of the utility model is arranged for doubling plate, 24 (pulsewidth modulation work(of digital power amplifier PWM pulse-width modulation circuits
Electric discharge 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 24,14 output terminal of Switching Power Supply isolating transformer circuit are connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit
21st, assist 1 current rectifying and wave filtering circuit 31 of power supply, assist 2 current rectifying and wave filtering circuit 37 of power supply, fan voltage current rectifying and wave filtering circuit 41, it is auxiliary
Assistant 1 current rectifying and wave filtering circuit 31 of power supply connects +/- 5V after +/- 12V assists 1 circuit 32 of voltage and assists 1 circuit 34 of voltage, +/-
5V assists 1 circuit of voltage, 34 output terminal connection digital power amplifier PWM pulse-width modulation circuits 24, assists 1 current rectifying and wave filtering circuit 31 of power supply
Connection+5V assists 2 circuit 35 of voltage after+12V assists 2 circuit 33 of voltage；
Digital power amplifier principal voltage current rectifying and wave filtering circuit 21 connects output power limit circuit after overcurrent sensing circuit 22
16,22 output terminal of current detection circuit 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
24 output terminal of modulation circuit connection digital power amplifier output circuit 18, protection indicating circuit 19, digital power amplifier PWM pulse-width modulation circuits
24 input terminals connection signal protection circuit 17.
Signal protection circuit 17：Signal amplification/pattern conversion/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/overcurrent/overvoltage protection, output protection instruction.
+/- 12V, which assists 1 circuit 32 of voltage and provides +/- 12V, assists voltage output 1；+ 12V assist 2 circuit 33 of voltage provide+
12V assists voltage output 2 (optional)；+ 5V, which assists 2 circuit 35 of voltage and provides+5V, assists voltage output 2 (optional)；Assist
2 current rectifying and wave filtering circuit 37 of power supply provides+48V outputs (optional).
The connection AC alternating current inputs of 11 input terminal of electromagnetic interface filter, 11 output terminal of electromagnetic interface filter connection bridge-type rectifying and wave-filtering electricity
Road 12, bridge rectifier filter circuit 12 make choice the alternating voltage of input, the connection of 12 output terminal of bridge rectifier filter circuit
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, limits power, and current limliting, alarms, shutdown；Overheat protector module -- hiccup protections-drop
Warm self-starting, Reset protections-electrification reset, software or manual reset), 13 output terminal of auto-excitation type half-bridge switch power source circuit connects
Connect Switching Power Supply isolating transformer circuit 14.
Digital power amplifier output circuit 18 exports signal and is carried out at the same time filtering/detection/energy regenerating.
41 output terminal of fan voltage current rectifying and wave filtering circuit 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, the pin 3 of plug receptacle J5B is grounded, and plug receptacle J2B passes through resistance
It is grounded after R128A, capacitance C114；The pin 8 of plug receptacle J6B is grounded；Plug receptacle J4B is followed by by resistance R129A, capacitance C115
Ground.
PWM driving chips power circuit 23 (pulse-width modulation power circuit) is equipped 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.
The pin 5 of plug receptacle J6B connects the emitter E of the PNP triode Q4 of on/off control circuit 15, startup/pass
The +/- 12V of collector C connections for closing the PNP triode Q4 of control circuit 15 assists the power supply of 1 circuit 32 of voltage and bears -12V, PNP tri-
The collector C of pole pipe Q5 connects the base stage B of PNP triode Q4 after resistance R187, and the base stage B of PNP triode Q4 is by electricity
It is grounded after holding C144, the mute interface MUTE of base stage B connections of PNP triode Q4.
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, the pin 10 of chip U2, which connects +/- 12V and assists the power supply of 1 circuit 32 of voltage, to be born, and the pin 14 of chip U2 is by resistance R27
The grid G of NMOS tube D-FET3 is connected afterwards, and the pin 13 of chip U2 connects the source S and NMOS tube D-FET4 of NMOS tube D-FET3
Drain D, the 13 output work discharge signal of pin of chip U2, the drain D connection+B end interfaces of NMOS tube D-FET3, chip U2's draws
Foot 16 by resistance R44, diode D2 cathode-anode after connect the drain D of NMOS tube D-FET3, resistance R44 and resistance R27
Between be in series with resistance R29.
The drain D of the source S connection NMOS tube D-FET4 of NMOS tube D-FET3, the source S connection core of NMOS tube D-FET4
The pin 10 of piece U2, the grid G of NMOS tube D-FET4 connect the pin 11 of chip U2, NMOS tube D-FET4 after resistance R28
Grid G the source S of NMOS tube D-FET4 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 equipped with
Thermal-shutdown circuit, the thermal-shutdown circuit of first group of PWM power amplifier unit include PNP triode Q1, thermistor PR1, chip
The pin 1 of U2 is connected in parallel thermistor PR1, the emitter E of PNP triode Q1, and the pin 1 of chip U2 passes through thermistor
The base stage B of PNP triode Q1 is connected after PR1, the base stage B of PNP triode Q1 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 utility model, its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to the scope of the utility model.It should be pointed out that the ordinary skill for this area
For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this
The protection domain of utility model.Therefore, the scope of protection of the utility model 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, its feature exists
In Switching Power Supply isolating transformer circuit (14) connects digital power amplifier PWM pulsewidth tune after on/off control circuit (15)
Circuit (24) processed, Switching Power Supply isolating transformer circuit (14) output terminal are connected in parallel digital power amplifier principal voltage current rectifying and wave filtering circuit
(21), assist 1 current rectifying and wave filtering circuit of power supply (31), assist 2 current rectifying and wave filtering circuit of power supply (37), fan voltage current rectifying and wave filtering circuit
(41), assist 1 current rectifying and wave filtering circuit of power supply (31) and connect +/- 5V after +/- 12V assists 1 circuit of voltage (32) and assist voltage 1
Circuit (34), +/- 5V assist 1 circuit of voltage (34) output terminal connection digital power amplifier PWM pulse-width modulation circuits (24), assist power supply
1 current rectifying and wave filtering circuit (31) connection+5V after+12V assists 2 circuit of voltage (33) assists 2 circuit of voltage (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 terminal 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 terminal connection digital power amplifier output circuit (18), protection indicating circuit (19), digital work(
Put PWM pulse-width modulation circuits (24) input terminal 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 terminal 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 terminal, electromagnetic interface filter (11) output terminal connection bridge-type rectifying and wave-filtering electricity
Road (12), bridge rectifier filter circuit (12) output terminal connection auto-excitation type half-bridge switch power source circuit (13), auto-excitation type half-bridge are opened
Powered-down source circuit (13) output terminal 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), the pin 4 of plug receptacle J5B,
5th, the 7 +/- 5V boost voltages circuit (33) of connection, the pin 3 of plug receptacle J5B are grounded, and plug receptacle J2B is by resistance R128A, capacitance
It is grounded after C114；The pin 8 of plug receptacle J6B is grounded；Plug receptacle J4B is grounded after resistance R129A, capacitance 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 equipped 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；
The pin 5 of plug receptacle J6B connects the emitter E of the PNP triode Q4 of on/off control circuit (15), on/off
The power supply that the +/- 12V of collector C connections of the PNP triode Q4 of control circuit (15) assists 1 circuit of voltage (32) bears -12V, PNP
The collector C of triode Q5 connects the base stage B of PNP triode Q4 after resistance R187, and the base stage B of PNP triode Q4 passes through
It is grounded after capacitance C144, the mute interface MUTE of base stage B connections of PNP triode Q4.
A kind of 5. double PWM unit power amplifier modules of pulsewidth modulation according to claim 1, it is characterised in that the numeral 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
The pin 15 of U2, chip U2 connection+B end interfaces after resistance R39, the pin 10 of chip U2 connect +/- 12V and assist voltage 1
The power supply of circuit (32) is born, and the pin 14 of chip U2 connects the grid G of NMOS tube D-FET3 after resistance R27, chip U2's
Pin 13 connects the source S of NMOS tube D-FET3 and the drain D of NMOS tube D-FET4, and the pin 13 of chip U2 exports power amplifier letter
Number, the drain D connection+B end interfaces of NMOS tube D-FET3, the process resistance of pin 16 R44 of chip U2, the cathode of diode D2-
The drain D of NMOS tube D-FET3 is connected after anode, resistance R29 is in series between resistance R44 and resistance R27；
The drain D of the source S connection NMOS tube D-FET4 of NMOS tube D-FET3, the source S connection chip U2 of NMOS tube D-FET4
Pin 10, the grid G of NMOS tube D-FET4 connects the pin 11 of chip U2, the grid of NMOS tube D-FET4 after resistance R28
Pole G connects the source S of NMOS tube D-FET4 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 numeral work(
First group of PWM power amplifier unit for putting PWM pulse-width modulation circuits (24) is equipped with thermal-shutdown circuit, first group of PWM power amplifier unit
Thermal-shutdown circuit include PNP triode Q1, thermistor PR1, the pin 1 of chip U2 be connected in parallel thermistor PR1,
The emitter E of PNP triode Q1, the pin 1 of chip U2 connect the base stage B, PNP of PNP triode Q1 after thermistor PR1
The base stage B of triode Q1 is grounded after resistance R15；Second group of PWM power amplifier unit and first group of PWM power amplifier unit structure phase
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721082598.9U CN207304890U (en) | 2017-08-28 | 2017-08-28 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721082598.9U CN207304890U (en) | 2017-08-28 | 2017-08-28 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207304890U true CN207304890U (en) | 2018-05-01 |
Family
ID=62437908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721082598.9U Expired - Fee Related CN207304890U (en) | 2017-08-28 | 2017-08-28 | A kind of double PWM unit power amplifier modules of pulsewidth modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207304890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112601164A (en) * | 2020-12-30 | 2021-04-02 | 东莞精恒电子有限公司 | Power amplifier circuit system of high-power 6000W digital power amplifier |
-
2017
- 2017-08-28 CN CN201721082598.9U patent/CN207304890U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112601164A (en) * | 2020-12-30 | 2021-04-02 | 东莞精恒电子有限公司 | Power amplifier circuit system of high-power 6000W digital power amplifier |
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Granted publication date: 20180501 |