Showing posts with label audio. Show all posts
Showing posts with label audio. Show all posts

Saturday, August 3, 2013

Basic devices in the car audio system

car amplifier
Entertainment in the form of music, news or even movies, generated from a series of audio devices found in a car. The series device known as a car audio system.
What tool or device contained in car audio system?

  • Car Head Unit - Head unit is the core of a car audio system, part of the car audio system that plays sound. The continued development of technology makes the head unit is no longer only serve as a radio receiver FM / AM CD player and a player, some have additional functions to be able to play MP3s. There is also a car head unit that has the ability to play DVDs complete with monitors and can be connected with IPOD.
  • Power Amplifier - The function of the power amplifier is to amplify the signal coming out of the head unit. In the world of various types of car audio power amplifiers are divided into several classes, such as class A, B, AB, and D. Each class power amplifier has the advantage that its usefulness can be tailored to our needs in building a car audio system. In addition to class division, the division of power amplifiers can also be seen from the number of channels (channels) and the amount of power generated by the power amplifier.
  • Speaker - A device that functions convert electronic signals into audible sound. The speakers were divided into several parts / components, namely, subwoofers, woofers, mid-range, and tweeter. In order for speakers to work properly, required a series of electronic components that serves as a filter (cross over).
  • Processor - With advances in technology processors play a significant role in a car system. Inside there is a processor features like time correction, cross-over-active, etc. equalizer. With the functions it will be very easy at the time of tuning car audioaudio system.
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Tuesday, April 9, 2013

30W Audio Amplifier based TDA7296

30W Audio Amplifier based TDA7296
The audio power amplifier of this scheme is a power amplifier based on TDA7296 chip. The audio amplifier is a class AB amplifier, which can be used in high fidelity (stereo, speakers powered car, TV five stars). The maximum output power obtained with TDA7296 amplifier circuit is about 60 watts. Thanks to the wide range of voltages and high power output capability is able to provide the highest power in 4 and 8 ohm impedance load.

The TDA7296 is provided with both stand-by and mute two independently driven by CMOS logic input pin compatible and optimized to avoid any kind of uncontrolled audible transient at the output. The maximum power of 60 watts is obtained with a power supply around 29V VS = ± 8 ohm load impedance, VS = ± 24V, 6-ohm load impedance, VS = ± 22V 4-ohm impedance loading.

The 60-watt maximum power delivery of the audio circuit is obtained with a 10% total harmonic distortion. Use a power supply around VS = ± 24V, 8 ohm load impedance, VS = ± 21V, 6-ohm load impedance, VS = ± 18V 4-ohm load impedance of the maximum power delivered by the amplifier is 30W, but the total harmonic distortion is about 0.5%. Key features of this amplifier are: high output power, high voltage 30V operation, the mute and standby functions, thermal shutdown and short circuit protection.

Soure : electroniq.net
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Friday, April 5, 2013

1000W ICs audio amplifier with PA03

This is a series of amplifiers are based on the most high-ic power that I have ever known. Because the output is issued up to 1000 watts with the impedance RL 4Ohm. Current supply 120mA, and 30A output current. Minimum input voltage of about 30V and a maximum voltage up to 150V. This is an audio amplifier that I have come across use ICs that maximum voltage up to 150V and output power up to 1000W , the scheme below gan.
1000W ICs audio power amplifier


Part List
Resistor
R1 = 10K
R2 = 10K
R3 = 220K
R4 = 0.18R 5W
R5 = 2.2R 2W
R6 = 0.18R 5W
Capacitor
C1 = 1uF
C2 = 1000uF
C3 = 68pF
C4 = 1000uF
Inductor
L1 = 4MH
IC
U1 = PA03

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