In this project we made an amplifier using Hi-fi and popular LM3886 Gainclone Amplifier IC. Many of us wants to make Virtual 5.1 or 7.1 Music System with this ic, but due to a lot of wiring we made a design with expandable feature, This Circuit has inbuilt Zobel Network,

ABOUT THE PERFORMANCE

The LM3886 is a high performance audio power amplifier capable of delivering 68W of continuous average power to a 4 Ohms load and 38W into 8 Ohms Load with 0.1% THD+N from 20Hz - 20Khz.

The performance of the LM3886, utilizing its self peak instandaneous TEMPRATURE ( SPIKE ) Protection Circuitry, Puts It in a class Above Discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area. SPIKE Protection means that these parts are completely Safegaurded at the output against OVERVOLTAGE, UNDERVOLTAGE, OVERLOADS, Including shorts to the supplies, thermal runaway, and instantenous temprature peaks,

The LM3886 Maintains an excellent signal to noise ratio of greater than 92dB with a typical low noise floor of 2.0 uV. it exhibits extremely low THD+N Values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD typical rating of 0.004%.

FEATURES

? 68W Continuous Average Output Power at 4 ohms at Vcc = ±28V

? 38W Continuous Average Output Power at 8 ohms at Vcc = ±28V

? 50W Continuous Average Output Power at 8 ohms at Vcc = ±35V

? 135W Instant Peak Power Output Capability

? Signal to noise ratio >92dB

? Input Mute Function

? Output Portection from short to ground or to the supplies via internal current limiting circuitry

? Output Over Voltage Protection against Transients from Inductive Loads

? Wide Supply Range 20V - 94V

APPLICATIONS

? Component Stereo

? Compact Stereo

? Self-powered speakers

? Surround Sound Amplifiers

? High End Stereo TVs

? Studio Monitors

? Active Towers

BILL OF MATERIALS

BILL OF MATERIALS

RESISTORS

QTY VALUE

3X 22K ohms 1/4 Watts

2X 1K ohms 1/4 Watts

2X 10 Ohms 1 Watts

CAPACITORS

2X 150nf 100V NON POLAR

3X 100nf 100V NON POLAR

1X 220pf 100V Polyster

1X 2.2uf 250V NON POLAR

2X 470uf 63V Electrolytic

2X 100uf 63V Electrolytic

ICs

1X LM3886TF GAINCLONE AMPLIFIER IC

CONNECTORS

2X 2 PIN SCREW TERMINAL BLOCK

2X 3 PIN SCREW TERMINAL BLOCK

Refer the tutorial Video

INDIAN XTREME AUDIO

Link- https://www.youtube.com/watch?v=Icin6rnPTDs&t=698s

Project Gerber, and pcb layout pdf is given in the videos Description.