AmplifierCircuits

Overview: The AN7510/7520 series is a 0.5W to 3W BTL audio power amplifier IC. Equipped with a standby function and mute or DC  volume circuit, the series includes a lineup of single and dual output models. With simplified set design due to minimum  external components, this IC has a wide variety of applications. Features: Operating power sourcs voltage: 3.0V to 13.5V. Built-in standby function. Built-in mute or DC volume circuit. Circuit Diagram:  0.5W to 3W BTL audio power amplifier IC

This article just promote for free whis project. Original article sourse www.adafruit.com/products/1788 Arduino 3W Stereo Amp

General description:      The SA58672 is a mono, filter-free class-D audio amplifier which is available in a 9 bump  WLCSP (Wafer Level Chip-Size Package) and 10-terminal HVSON packages.  The SA58672 features shutdown control. Improved immunity to noise and RF rectification  is increased by high PSRR and differential circuit topology. Fast start-up time and very  small WLCSP package makes it an ideal choice for both cellular handsets and PDAs.  The SA58672 delivers 1.7 W at 5 V and 800 mW at 3.6 V into 8 Ω. It delivers 3.0 W at 5 V  and 1.6 W at 3.6 V into 4 Ω. The maximum power efficiency is excellent at 90 % into 8 Ω  and 84 % to 88 % into 4 Ω. The SA58672 provides thermal and short-circuit shutdown  protection. Circuit Diagram: 3.0 W mono class-D audio amplifier

General description: The SA58631 is a one channel audio amplifier in an HVSON8 package. It provides power  output of 3 W with an 8 Ω load at 9 V supply. The internal circuit is comprised of a BTL  (Bridge Tied Load) amplifier with a complementary PNP-NPN output stage and  standby/mute logic. The SA58631 is housed in an 8-pin HVSON package which has an  exposed die attach paddle enabling reduced thermal resistance and increased power  dissipation. Circuit Diagram: 3 W BTL audio amplifier PCB layout: Pcb layout 3 W BTL audio amplifier

Circuit Diagram: 3W MONO BRIDGE AMPLIFIER

Features CAN DELIVER 2W THD 10% 12V/8Ω INTERNAL FIXED GAIN 32dB NO FEEDBACK CAPACITOR NO BOUCHEROT CELL THERMAL PROTECTION AC SHORT CIRCUIT PROTECTION SVR CAPACITOR FOR BETTER RIPPLE REJECTION LOW TURN-ON/OFF POP STAND-BY MODE General Description The device TDA7267 is a new technology Mono  Audio Amplifier in MINIDIP package specifically  designed for TV application.  Thanks to the fully complementary output configuration  the device delivers a rail to rail voltage  swing without need of boostrap capacitors Circuit Diagram: 2W MONO AMPLIFIER Circuit Diagram

Features: No external components No switch-on/off clicks Good overall stability Low power consumption Short circuit proof ESD protected on all pins. Circuit Diagram: 3 W mono BTL audio output amplifier

You probably know with the purpose of LM317 IC is used being an changeable voltage manager, but did you know it can take place used as an audio amplifier? This is a taste A audio amplifier built with LM317 so as to delivers a utmost 1W audio power. Manipulate a worthy heatsink pro the LM317 IC and adjust the 5K inconsistent resistor so with the aim of you allow 4.5V on 10Ω resistor (otherwise LM317 pin 2, Vout).