A dual audio power amplifier typically refers to a device or circuit that amplifies audio signals from two separate sources or channels. This type of amplifier is commonly used in stereo systems, home theaters, and other audio applications where separate audio channels need to be amplified and played through speakers.

Part Number: D2822

Function: Dual Power Amplifier

Package: DIP 8 Pin type

Manufacturer: Shaoxing Silicore

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Description

The D2822 is a monolithic integrated circuit in 8 lead Minidip package. It is intended for use as dual audio power amplifier in portable cassette tape players and radios.

1. Stereo Sound: In stereo systems, the left and right audio channels are amplified separately to maintain the spatial audio separation and provide a more immersive listening experience.

2. Speaker Output: The amplified audio signals from each channel are then sent to corresponding speakers. This is important for achieving balanced audio reproduction.

3. Power Output: The power output of each channel indicates how much power the amplifier can deliver to the speakers. It’s typically measured in watts (W) and determines how loud the speakers can play without distortion.

Features

1. Dual Low-voltage power amplifier

2. Supply voltage down to 1.8V

3. Low crossover distortion Outline Drawing

4. Low quiescent current

5. Bridge or stereo configuration

 

D2822 PDF Datasheet

This post explains for the amplifier.

The Part Number is TDA7265.

The function of this semiconductor is 25 +25W STEREO AMPLIFIER.

The package is Multiwatt11.

Manufacturer: ST Microelectronics

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Description

This is 25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY. A stereo amplifier, often simply referred to as an “amp,” is an electronic device designed to amplify audio signals in a stereo audio system. Stereo amplifiers are a fundamental component of audio systems, providing the necessary power to drive speakers and reproduce sound with clarity and fidelity.

The TDA7265 is class AB dual Audio power amplifier assembled in the Multiwatt package, specially designed for high quality sound application as Hi-Fi music centers and stereo TV sets.

A Class AB dual audio power amplifier is an electronic amplifier that is designed to amplify audio signals with two channels (typically left and right) using Class AB amplifier topology. Class AB amplifiers are known for their efficiency and good linearity, making them suitable for high-quality audio reproduction.

Features

1. WIDE SUPPLY VOLTAGE RANGE (UP TO ±25V ABS MAX.)

2. SPLIT SUPPLY

3. HIGH OUTPUT POWER : 25 + 25W @ THD =10%, RL = 8Ω, VS = +20V

4. NO POP AT TURN-ON/OFF

5. MUTE (POP FREE)

6. STAND-BY FEATURE (LOW Iq)

7. SHORT CIRCUIT PROTECTION

8. THERMAL OVERLOAD PROTECTION

 

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TDA7265 PDF Datasheet