4/27/2014

30W Power Audio Amplifier Circuit Diagram

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Description:

TIP141 si a npn silicon power darling tons designed for complementary use with TIP145, TIP146 and TP147. Can stand up to 125 W at 25°C Case Temperature, 10 A Continuous Collector Currentand has a minimum hFE of 1000 at 4 V, 5 A. This home audio amplifier can output 30W with a +- 32V symmetric power supply. If you want a stereo power amplifier please check out the other schematics.

Features:


Circuit diagram:




Layout

Partlist

R1=1KohmR16-17=270ohmD1=9.1V 0.4W zener
R2=47KohmR18=22ohm 1WD2-3=1N4148
R3=1.5KohmR19=NCQ1-2=BC550C
R4-5=10KohmR20-21=0.39ohm 4WQ3=MPSA56
R6=5.6KohmTR1=250ohm trimmerQ4=BC547B
R7=10ohmC1=470nF 100V MKTQ5=BC212
R8=47KohmC2=1nF 100V MKTQ6=BC183
R9=560ohmC3=68pF ceramicQ7-8=MPSAO6
R10-11=8.2KohmC4-8=22nF 100V MKTQ9=TIP141
R12-15=120ohmC5-6-7=100nF 100V MKTQ10=TIP146
R13=680ohmC9=47uF 25VF1-2=1.6AT FUSE
R14=330ohmC10-11=220uF 63VAll the resistors is 1/4W 1% except quote differently
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100W Subwoofer Amplifier

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Features for 100W Subwoofer Amplifier:
  • Output power (f=1 KHz, d=0.5 %): 100 W in 8 ohm
  • Supply voltage: ................ СЃ 40 V
  • Quiescent current: ............. 50 mA
  • Maximum current: ............... 2.6 A
  • Sensitivity: . 600 mV
  • Frequency response: ............ 10-35000 Hz (-1 dB)
  • Distortion HD: ................. 0.01 %
  • Intermodulation dist.: ......... 0.02 %
  • Signal/noise: 83 dBConstruction

Circuit diagram for 100W Subwoofer Amplifier:

100W Subwoofer Amplifier
more info to orifinal article sourse english.cxem.net

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4/23/2014

100 Watt MOSFET Amplifier Circuit

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Circuit Descpription

MOSFET based amplifiers as we all know are outstanding with their sound qualities and they can easilly beat the performance of other counterparts based on power transistors or linear ICs.
However amplifiers based on mosfets are not always easy to design or make.

Circuit Diagram

100 Watt MOSFET Amplifier Circuit

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100 Watt Amplifier Circuit Using Transistors

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Circuit Description



     A amplifier incorporating an input filter stage, an intermediate driver stage and a powerful symmetrical output stage consisting of the versatile 2N3055 power transistors. The circuit efficiently drives a 100 watt 4 Ohms speaker with inputs derived from any audio source like a cell phone or DVD player etc.
     100 watt amplifier circuit using 2N3055 transistors, a prior understanding of the involved circuit configuration would be very handy, let’s begin the explanation with the following points:
     A quick glance at the given circuit diagram makes us conclude that the output configuration is not symmetrical, since the transistors T15 and T16 are both NPN types.
     The input stage of the circuit begins or initiates with a symmetrical differential preamplifier stage consisting of the transistors T1, T2 and T3, T4. T5 and T6 are positioned as the current sources which are further extended as the driver stage consisting of the transistors T7 and T8. However a closer inspection tells us that of course the wiring is symmetrical, having the transistors T11, T13, T15 at the upper section acting like special booster transistor package. Similarly the lower section also employs identical super booster stage consisting of the transistors T12, T14 and T16. The above two sections are perfectly complementary to each other, with reference to the diagram which indicates their emitters being terminated to a common point through the resistors R25 to R27 and via R28 to R30, this effectively that the wiring is exclusively symmetrical by nature. The output stage is able to produce a massive 200,000 times amplification factor with comparatively very low quiescent current drain.
        Though not absolutely necessary, for better thermal stability the transistors T9 and T11 and also T10 and T12 should be glued together, preferably by attaching the respective pairs face to face.

Circuit Diagram


 100 Watt Amplifier Circuit Using Transistors

Parts List

 


  • R1 = 430 K,
  • R2 = 47K,
  • R3 = 330 Ohms,
  • R4, R5 = 12 K ,
  • R6, R7, R20, R21, R22, R23, R24 = 1 Ohm, 3 Watt, Wire Wound Type
  • R8, R17 = 68 Ohms,
  • R9 = 100 K,
  • R10, R11, R12, R13 = 5K6,
  • R14, R15 = 12 K,
  • R16, R19 = 100 Ohms,
  • R25 = 10 Ohms / 2 Watts,
  • P1 = 100 Ohms Preset, Linear
  • C1 = 1 µF / 25V,
  • C2 = 1 n, CERAMIC,
  • C3, C4 = 100Pf
  • C5 = 100 n,
  • C6, C7 = 1000 uF / 35 V,
  • L1 = 20 turns of enameled 1mm copper wire over R24,
  • D1, D2 = RED LED 5mm,
  • All other diodes are = 1N4148,
  • T1 = Matching BC546 pair,
  • T2 = Matching BC556 pair,
  • T3 = BC 557B,
  • T4, T7, T8 = BC 547B,
  • T5, T12 = BC 556B,
  • T6, T9 = BC 546B,
  • T10 = BD 140  
  • T13 = BD 139  
  • T11, T14 = 2N 3055  
  • General Purpose PCB,
  • All the transistors T10, T13, T11 and T14 ae mounted on suitable heatsinks
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4/22/2014

200W Audio Amplifier

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General Description:

This complete high quality, low noise mono audio power amplifier is based around the Hybrid Integrated Circuit STK4050 manufactured by Sanyo. The circuit incorporates volume and has a maximum music output power of 200W.The circuit incorporates an on board power supply; therefore, only centre tapped transformer is required to power the circuit. I t has very good quality sound. U can use it with your Home Theatre your PC & etc... You can also use it as Subwoofer Amplifier. It is a compact package for THIN-TYPE Audio sets. Easy Heatsink design to disperse heat generated in THIN-TYPE audio sets. Constant-Current circuit to Reduce supply switch-ON and switch-OFF shock noise. External supply switch-On and switch-OFF shock noise muting, Load short-circuit protection, thermal shutdown and other circuits can be tailored-designed.

Features:

  • Output Power : 200Watts
  • Load Resistance : 8ohms
  • Input impedance : 55K
  • Maximum supply voltage : (+95v)-0-(-95v)
  • Recommended supply voltage : (+66v)-0-(-66v)

Circuit Diagram:

200 W Audio Amplifier

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100W Audio Amplifier with MUTE/ST-BY

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General description:


  • VS - Supply Voltage (No Signal) ±50 V
  • IO - Output Peak Current 10 A
  • Ptot - Power Dissipation Tcase= 70°C 50 W
  • Top - Operating Ambient Temperature Range 0 to 70 °C
  • Tstg,- Tj Storage and Junction Temperature 150 °C

Amplifier circuit diagram

:




Layout circuit diagram

:



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100w audio amplifier

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General description:

 

All resistors are standard metal film 250mW except: R1/3/4/7, these are 2W metal film, and the 0.22ohm beeing 5W. Around R7 is wounded a 0.6mm isolated (enamelled) copper wire forming the output coil. (~12 windings)  For c19 i used 470uf/16v, all other electrolytics 63v. The 10/100/330pF should be mica-caps. The 100nf and 47nf is recommended to be Wima MKS2 (or better), also for C1 i suggest Wima MKS2, 4.7uf is enough. For Trimpot i use a Piher. The MPSA18 can be substituted by BC550C, for all other parts i do not recommend changes, especially the feedback network (r29/30) should be kept unchanged, feedback compensation is very delicate for this circuit ! Be careful when substituting the MPSA18 with BC550C, the pinout is reversed between these 2 transistors !!! The bias is adjusted via the trimpot (R22). Recommended bias is 55ma, resulting in 12mv across a single 0.22ohms or 24mv across both 0.22ohms. Connect a DMM to the upper wires of these resistors and adjust trimpot until DMM reads wanted voltage.

Features:

 


THD: ~0.005% (measured) sim'd: 0.002%
Power into 8ohm: 60 watts
Power into 4ohm: 100 watts
Gain: 32dB (~1:40) full output at 0.7v input (0.5v rms)
Feedback: 57dB
GainBandWidth: ~400Mhz
Slewrate: ~20v/us (symetrical)
Supply voltage: +/- 36v
Biasing: 55ma, ~12mv across a single 0.22 ohm
Measurings:The measuring setup itself is far from perfect, but gives a good idea !
Frequency response: 3.2hz to 145khz (-1db) using 4.7uf input cap
Phaseshift at 10khz: <3°
More will follow !

Circuit Diagram:

100w audio amplifier  circuit diagram

 

Layout Diagram:

100w audio amplifier  layout diagram


Partlist:


Device
Qty
Value
Notes
Q1,Q2
2
MPSA18
can be substituted by BC550C (pins reversed !)
Q7,Q8
2
BC546B
or maybe 2n5551 (pins reversed !)
Q3,Q9
2
2N5551
OnSemi/Fairchild/Philips
Q4,Q5,Q12
3
2N5401
OnSemi/Fairchild/Philips
T1
1
BD139
or bd135, bd135-16
U$5
1
MJE15030
OnSemi
U$6
1
MJE15031
OnSemi
U$3
1
MJL3281A
OnSemi
U$4
1
MJL1302A
OnSemi


Device
Qty
Value
Notes
C14
1
10pF (has been 22pF)
Mica
C2,C7
2
100pF
Mica
C3,C4
2
330pF
Mica
C18
1
47nF
Wima MKS2
C5, C6, C10, C11, C16, C17, C20
7
100nF
Wima MKS2
C1
1
10uF (4.7uF also fits)
Wima MKS2
C8,C9
2
100uF
Electrolytic 63v (at least 40v)
C19
1
470uF
Electrolytic 16v
C12,C13
2
1000uF
Electrolytic 63v (at least 40v)


Device
Qty
Value
Notes
R27,R28
2
0R22
5Watts
R1, R3
2
1R2
2Watts metal film
R4
1
4R7
2Watts metal film
R7
1
10
2Watts metal film
R2
1
10
250mW metal film
R8, R9
2
22
250mW metal film
R31, R32
2
47 (have been 22)
250mW metal film
R26
1
33
250mW metal film
R10
1
68
250mW metal film
R15,R17
2
150
250mW metal film
R11
1
220
250mW metal film
R24,R30
2
499 (or 500)
250mW metal film
R5,R6
2
680
250mW metal film
R13,R23
2
2k
250mW metal film
R12,R14,R29
3
22k
250mW metal film
R18,R20
2
47k
250mW metal film
R22
1
1k pot
Piher, small (470ohm might be better)

Device
Qty
Value
Notes
F1,F2
2
2.5T Fuse
Slow blow
F1,F2
2
---
Fuse holder
L1
1
---
0.6mm isolated (enamelled) copper wire wounded around R7 forming the output coil.

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