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25W Hi-Fi Audio Amplifier using ic LM1875

This circuit is the audio amplifier circuit has a very popular one.This is a simple circuit. Small pieces of equipment. And Watt are high.The circuit uses IC number LM1875, which is under the protection circuit IC output or Too short circuit. And a significant distortion as low as 0.015% at a frequency of 1kHz.

This circuit uses positive, negative ground power supply to get the audio signal with both halves of the signal swing, positive and negative halves,The sound that came out crystal clear.Work is. When paying into the audio input. Audio is through R1, R2, C1 and R3 to limit the audio signal appropriately.And limit the noise to the input signal mixed down to the ground.Then sends a signal to noise to the input pin of IC 1.A noninterting pin, amplifier non-return phase.Out of the 4 output pins to access the speakers.The R6 and C4 eliminate noise mixed with the output down to the ground.And another part of the audio output pin 4 of integrated circuit will be fed back into place through R5 to pin 2, which R4 and R5 determines the rate of boost up, can be calculated from R5/R4,will gain equal to 15 times, With a C2 to meet high frequencies better.

Be the first to comment - What do you think? Posted by admin - September 29, 2010 at 1:11 am

Categories: Power Amplifier Tags: Hi-Fi Audio amplifier, LM1875, Single Chip Amplifier

STA505 2X50 Watt Audio Amplifier

STA505 is a monolithic quad half bridge stage in Multipower BCD Technology. The device can be used as dual bridge or reconfigured, by connecting CONFIG pin to Vdd pin, as single bridge with double current capability, and as half bridge (Binary mode) with half current capability.

The device is particularly designed to make the output stage of a stereo All-Digital High Efficiency
(DDXâ„¢) amplifier capable to deliver 50 + 50W @ THD = 10% at Vcc 30V output power on 8W load and
80W @ THD = 10% at Vcc 36V on 8W load in single BTL configuration.
The input pins have threshold proportional to Ibias pin voltage.
40V 3.5A QUAD POWER HALF BRIDGE
*MINIMUM INPUT OUTPUT PULSE WIDTH DISTORTION
*200mW RdsON COMPLEMENTARY DMOS OUTPUT STAGE
*CMOS COMPATIBLE LOGIC INPUTS
*THERMAL PROTECTION
*THERMAL WARNING OUTPUT
*UNDER VOLTAGE PROTECTION
this circuit is a Typical Single BTL Configuration to obtain 80W @ THD 10%, RL = 8W, VCC = 36V

Source: www.elektropage.com

Be the first to comment - What do you think? Posted by admin - July 16, 2008 at 8:23 pm

Categories: Power Amplifier Tags: 50 watts stereo amplifier, Single Chip Amplifier, Stereo amplifiers

56W Audio Power Amplifier with Mute by LM3876

The LM3876 is a good quality component capable of delivering 56W continuously into an 8 ohm load and 100W peak – enough for any dorm! It has a quoted distortion figure of 0.06% at 40W output, and offers good sound quality in a simple design. It has comprehensive output protection circuitry, preventing not only thermal runaway, but protecting the device from short circuits on the output, and voltage spikes from inductive loads.

Source:http://www.headwize.com/projects/showfile.php?file=harrison2_prj.htm