10W R.M.S. Audio amplifier

INTRODUCTION
                             The aim of the project was to make an audio amplifier that can deliver up to 10W R.M.S. power output. input can be given via computer/mp3 player or a mic (mic circuit explanation at the end). there are many different types of amplifiers tda2003 is probably a class b amplifier because its power consumption is quiet low then normal amplifiers and also that its noise is very low.
the purpose for which i chose this ic is that it has very less external components, very low distortion,very low input power and a corresponding high output power.

ABOUT THE IC
                          TDA2003 is a 10W car radio audio amplifier The device provides a high output current capability (up to 3.5A) very low harmonic and cross-over distortion. Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground,thermal over-range,load dump voltage surge up to 40V

Step 1: Things Required

lists of components required to build the circuit

Resistors:

• R1:220 Ω
• R2: 2.2Ω
• R3: 1Ω 1 watt
• Rx: 39Ω                                  See the datasheet paw to alter the value of Rx
• RV1: 10kΩ

Capacitors

• C1: 2.2µF 25V electrolytic
• C2:470µF 35V electrolytic
• C3:0.1µF polyester or ceramic
• C4:1000µF/35 V electrolytic
• C5: 100nF polyester or ceramic
• C6: 100µF 35v electrolytic
• Cx 39nF                                       See the datasheet paw to alter the value of Cx

Semiconductors

• IC1: TDA2003

Miscellaneous
         :  connectors (cream shell connectors )
3-  2 pin connectors

Comments

[golddigger1559]

can a TDA2030av work???

[usbg3rd]

can't say for sure because this circuit is designed for TDA2003. but its circuit looks pretty similar , may be the components values are a bit different u can check the values from the datasheet.

[Lacrossanator1]

so do you mean i would do it just as shown in the schematic (with the 1 uf cap and 2k2 resistor) but instead of using 9v battery i could use one 1.5v cell?

[usbg3rd]

yes but mind that there are different types of mic so pick wisely and do not pic pizzo
the one i used i dont know the exact name or number but it was like

[usbg3rd]

yes but mind that there are different types of mic so pick wisely and do not pic pizzo
the one i used i dont know the exact name or number but it was like
http://www.google.com.pk/imgres?um=1&hl=en&safe=off&tbo=d&biw=1280&bih=930&tbm=isch&tbnid=PCkBoQMeHwIglM:&imgrefurl=http://www.panasonic.com/industrial/electronic-components/audio-components/electret-condenser-microphones.aspx&docid=PgAINLATIM6n6M&imgurl=http://www.panasonic.com/industrial/images/electronic-components/4.8-audio-components/audio-components-electret-condensor-mic-feature1.gif&w=144&h=104&ei=8ZLpULPjO4aD4ATQroHoDg&zoom=1&iact=hc&vpx=907&vpy=415&dur=3311&hovh=83&hovw=115&tx=87&ty=32&sig=109102747932937238433&page=2&tbnh=83&tbnw=102&start=33&ndsp=37&ved=1t:429,r:56,s:0,i:255

[Lacrossanator1]

I was just wondering if in the microphone add on circuit, is that two 9v batteries in series for a total of 18V? or just the one 9v battery?

[usbg3rd]

boy actually the microphone works on 1.5 or maximum i think 3 volts (depends on mic) and its power consumption is very very low .so u can use 1.5v cells they last so long in case of mic . so no need to build extra circuit to divert power to mic to .. but still u can do it if u like .

[SaurIMX]

you can use transistors too without using the TDA2003

[usbg3rd]

Making a amplifier with discrete components is the best punishment for anyone =P..
its too dificult to manage all of the transistors and even then all u get is a 1w or max 4w gain ..
if u have any link to discrete amplifier with gain greater than 10W do tell me i want to try one in summer.

[qwerty156]

2n3055 amplifier :O

[usbg3rd]

i have seen people making circuit from discrete components but when u will build one u will know that its more than 10 transformers that make up one amplifier 2 for the current mirrors 4 for the active loaded differential amplifier this completes one stage then comes the other stage which contains 2 transistors for the current mirror and 2 for providing bulk of gain so it is a HELL difficult making one discrete component amplifier and still u get 2W RMS output with consumption of 12V or greater

[usbg3rd]

BTW Kid keep on trying for making a discrete one it is an achievement and making amplifiers with ic's Even a Technition can do that an Engineer builds with discrete components

[kondzio29]

You should try the TDA1554Q amp 2x22W stereo
only four partsin circuit ;D

[usbg3rd]

Nice idea =)
but the IC works at 14V typically and delivers 44W output power which means that it will draw 3.2 Amperes current .. the transformers that are capable of supplying such amount of current are costly ..
B.T.W. it could be a very nice project for a music Lover ; )

[qwerty156]

why not use a computer power supply?
it will provide a lot of power on 12v

[usbg3rd]

U can use that just note that amplifiers do not draw continuous power so of the computer supply has some protection circuit it may stop giving power to the amplifier continually..
but still u can use that ... i will soon upload another supply circuit without transformer and rectifier circuit .. it will be quiet cheaper and efficient too..