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POWER AMPLIFIER WITH LM1875 AND NE5532 - 2 X 20W

The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumeraudio applications.

The LM1875 delivers 20 watts into a 4 or 8 load on 25V supplies. Using an 8 load and 30V supplies, over30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components.Device overload protection consists of both internal current limit and thermal shutdown. The LM1875 design takesadvantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high

output power levels. Other outstanding features include high gain, fast slew rate and a wide power bandwidth,large output voltage swing, high current capability, and a very wide supply range. The amplifier is internally

compensated and stable for gains of 10 or greater.Schematic diagram of a stereo amplifier using integrated circuit lm1875

Circuit description of the power audio amplifier with LM1875nThe schematic is simple and can be divided into three parts: Power supply, preamplifier and stereo power

amplifier.

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Power supply: This power supply is symmetrical, easy assembly, the transformer must be 60VA 18-0-18 volts inthe secondary to have a maximum of + 25 volts at the power supply, if you use speakers of 8 ohms can use upto 22 volt transformer and thus will have about 30 watts per channel. B1 is a bridge rectifier that must withstand

100 volts / 4 A, ex: GBU606. The capacitors C2 and C5 can be longer if you prefer, the power supply for thepreamplifier circuit is based on the integrated voltage regulators 7815 and 7915, beyond the initial source of the

capacitors, there are number of capacitors on supply lines of integrated circuits .Pre-Amplifier: This circuit is based on double operational amplifier NE5532N. The audio is coupled by C26, until

the pin 3 of ic5A is amplified and coupled via C25 to IC4 LM1875. In the right channel is the same thing.Stereo Power Amplifier: This circuit is based on two integrated circuit LM1875 audio amplifiers that allow

amplification of up to 20 watts per channel or 30 Watts maximum @ 8 ohms @ +-30Volts, are connected tospeakers 40 Watts RMS.

Board component side guidance for mounting the circuit with lm 1875

For those who do not want to use double-sided board, make red marks on the connection wires

Board Copper bottom side

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Copper board component-side

Connection diagram for the components

Users electronic tags:rangkaian power amplifier tda 2004, skema tda2004, lm1875 transistor, 1000 watt stereo power amplifier circuit,

SATELLITE CIRCUIT LM, skema amplifier matrix 150 watt, skema amply matrix, skema pre amp stereo, tda2030ne5532, preamplifier amplifier circuit diagram

Low Cost 150 Watt Amplifier Circuit

Description

http://www.electronica.mk/all_articles/Audio_Accessories/Amplifier_LM1875and_NE5532_2x20W/lm1875%20ne5532-top-2%20te1.com.br.pdfhttp://www.electronica.mk/all_articles/Audio_Accessories/Amplifier_LM1875and_NE5532_2x20W/lm1875%20ne5532-bottom%20te1.com.br.pdfhttp://www.electronica.mk/all_articles/Audio_Accessories/Amplifier_LM1875and_NE5532_2x20W/lm1875%20ne5532-top-2%20te1.com.br.pdfhttp://www.electronica.mk/all_articles/Audio_Accessories/Amplifier_LM1875and_NE5532_2x20W/lm1875%20ne5532-bottom%20te1.com.br.pdfhttp://www.electronica.mk/all_articles/Audio_Accessories/Amplifier_LM1875and_NE5532_2x20W/lm1875%20ne5532-top-2%20te1.com.br.pdfhttp://www.electronica.mk/all_articles/Audio_Accessories/Amplifier_LM1875and_NE5532_2x20W/lm1875%20ne5532-bottom%20te1.com.br.pdf

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This is the cheapest 150 Watt amplifier circuit you can make,I think.Based on two Darlington power

transistors TIP 142 and TIP 147 ,this circuit can deliver a blasting 150 W Rms to a 4 Ohm speaker.Enough for

you to get rocked?;then try out this.

TIP 147 and 142 are complementary Darlington pair transistors which can handle 5 A current and 100V

,famous for their ruggedness. Here two BC 558 transistors Q5 and Q4 are wired as pre amplifier and TIP 142

,TIP 147 together with TIP41 (Q1,Q2,Q3) is used for driving the speaker.This circuit is designed so rugged

that this can be assembled even on a perf board or even by pin to pin soldering.The circuit can be powered

from a +/-45V, 5A dual power supply.You must try this circuit.Its working great!

The preamplifier section of this circuit is based around Q4 and Q5 which forms a differential amplifier. The

use of a differential amplifier in the input stage reduces noise and also provides a means for applying negative

feedback. Thus overall performance of the amplifier is improved. Input signal is applied to the base of Q5

through the DC decoupling capacitor C2. Feedback voltage is applied to the base of Q4 from the junction of

0.33 ohm resistors through the 22K resistor. A complementary Class AB push-pull stage is built around the

transistors Q1 and Q2 for driving the loud speaker. Diodes D1 and D2 biases the complementary pair and

ensures Class AB operation. Transistor Q3 drives the push-pull pair and its base is directly coupled to the

collector of Q5.

Circuit Diagram & Parts List .

150 watt amplifier circuit diagram

Notes.

Remember TIP 142 and 147 are Darlington pairs .They are shown as conventional transistors in figurefor ease.So dont get confused.Even though each of them have 2 transistors ,2 resistors and 1 diode

inside ,only three pins ,base emitter and collector are coming out.Rest are connected internally.So its

quite OK to assume each of them as transistor for ease.

Use a well regulated and filtered power supply.

Connect a 10K POT in series with the input as volume control if you need.Not shown in circuitdiagram.

http://www.circuitstoday.com/wp-content/uploads/2008/03/150-watt-amplifer-circuit.png

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All electrolytic capacitors must be rated at least 50volts.Power supply for this circuit.

A +40/-40 unregulated dual supply for powering this amplifier project is shown below. This power supply is

only enough for powering one channel and for stereo applications double the current ratings of the

transformer, diodes and fuses.

Power supply for this project

TIP 142 & 147 Internal diagram and pin out.

TIP 142-TIP 147 Pin Out Diagram with Schematics

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1. 2 X 60 Watts Stereo Amplifier Circuit is designed using LM4780, an audio amplifier IC that can

deliver 60 Watt RMS output power per channel to 8 Ohms speakers. Advantages of using this IC are low

harmonic distortion compared to other IC amplifiers of similar category and a power supply rejection rate of

85db. In addition it require minimum components and a built in mute function.

2.Headphone Amplifier CircuitThis is a simple circuit which uses only 3 transistors, that can be used to

drive your headphone. It can be easily built by any one and can be powered using a 3 volts battery.

3.Mosfet Amplifier Circuit-This circuit is designed using two Mosfets and one transistor; which makes itan easy to build circuit. It can deliver 18 Watts output power to 8 ohms speaker or 30 watts to 4 ohms speaker;

you can do it the way you like it. Another advantage of this circuit is the minimal use of components.

4. 40 Watts Amplifier using TDA1514- TDA1514 is a high performance hi fi amplifier from Philips. It

requires a dual +25/-25 volts supply. Advantages of using TDA1514 are low THD, mute standby feature,

thermal protection and other features. It can deliver 40 watts of output power to an 8 ohm speaker. You need a

proper heat sink for the desired reliability of this circuit.

5.2 X 32 Watts Stereo Amplifier CircuitThis circuit is built using TDA2050 which is a 32 Watts Class

AB Audio amplifier IC (monolithic) . This IC has many features like thermal shut down, low THD, short

circuit protection etc. This circuit uses Two of these IC TDA205o; one for each channel. An 18 volts dualpower supply is required to power this circuit.

6 WATT POWER AMPLIFIERABHISHEK KAMDI NO COMMENTS

The TA7222 is a power amplifier for consumer application.

It is designed for high power, low distortion and low noise.

It also contains various kind of protectors.

It is suitable for car audio power amplifier with high performance.

Operating Supply Voltage Range Vcc = 9~18volt

High power is 6Watt

COMPONENTS LIST

Resistors:

P1=100k

R1=27 k

R2=220

Capacitors:

http://www.circuitstoday.com/2-x-60-w-audio-amplifier-circuithttp://www.circuitstoday.com/2-x-60-w-audio-amplifier-circuithttp://www.circuitstoday.com/head-phone-amplifier-circuithttp://www.circuitstoday.com/head-phone-amplifier-circuithttp://www.circuitstoday.com/head-phone-amplifier-circuithttp://www.circuitstoday.com/18-w-mosfet-amplifier-circuithttp://www.circuitstoday.com/18-w-mosfet-amplifier-circuithttp://www.circuitstoday.com/18-w-mosfet-amplifier-circuithttp://www.circuitstoday.com/40w-amplifier-using-tda1514http://www.circuitstoday.com/40w-amplifier-using-tda1514http://www.circuitstoday.com/2-x-32-watts-stereo-amplifierhttp://www.circuitstoday.com/2-x-32-watts-stereo-amplifierhttp://www.circuitstoday.com/2-x-32-watts-stereo-amplifierhttp://electronichobbyprojects.blogspot.com/2011/03/6-watt-power-amplifier.htmlhttp://electronichobbyprojects.blogspot.com/2011/03/6-watt-power-amplifier.html#comment-formhttp://3.bp.blogspot.com/-z7RqRHQaT80/TW5fVGWiWVI/AAAAAAAAADs/1HrqnLKQ8mA/s1600/TA7222.PNGhttp://electronichobbyprojects.blogspot.com/2011/03/6-watt-power-amplifier.html#comment-formhttp://electronichobbyprojects.blogspot.com/2011/03/6-watt-power-amplifier.htmlhttp://www.circuitstoday.com/2-x-32-watts-stereo-amplifierhttp://www.circuitstoday.com/40w-amplifier-using-tda1514http://www.circuitstoday.com/18-w-mosfet-amplifier-circuithttp://www.circuitstoday.com/head-phone-amplifier-circuithttp://www.circuitstoday.com/2-x-60-w-audio-amplifier-circuit

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C1=4,7F/50V

C2=470F/22V

C3=47F/22V

C4=100nF

C5=47F/22V

C5=470F/22V

Semiconductors:

IC1= TA7222AP

Miscellaneous:

Heatsink for IC1