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Overture Audio Power Amplifier Series Dual 20-Watt Audio Power Amplifier with Mute and Standby Modes

The LM1876 is a stereo audio amplifier capable of delivering typically 20W per channel of continuous average output power into a 4 or 8 load with less than 0.1% THD+N.

Each amplifier has an independent smooth transition fade-in/out mute and a power conserving standby mode which can be controlled by external logic.

The performance of the LM1876, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, places it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are safeguarded at the output against overvoltage, undervoltage, overloads, including thermal runaway and instantaneous temperature peaks.

Circuit Diagram

Dual 20-Watt Audio Power Amplifier Circuit Diagram

Applications

High-end stereo TVs

Component stereo

Compact stereo

Features

SPiKe protection

Minimal amount of external components necessary

Quiet fade-in/out mute mode

Standby-mode

Isolated 15-lead TO-220 package

Non-Isolated 15-lead TO-220 package

Wide supply range 20V - 64V

Here is the circuit diagram of superb mini audio power amplifier, That can be power with 4.5 volt dc to 18 volts dc (maximum). This amplifier is based on TDA1015, Product of NXP Semiconductors formerly PHILIPS Semiconductors. The TDA1015 is a monolithic integrated audio amplifier circuit in a 9-lead single in-line (SIL) plastic package. The device is especially designed for portable radio and recorder applications and delivers up to 4 watt in a 4 ohm load impedance. The very low applicable supply voltage of 3,6 V permits 6 V applications.

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Parts:

R1330K
R25.6K
R34.7R
C11uF-25V
C21uF-25V
C3100pF
C4100nF-63V
C5182pF
C6224pF
C7100uF-25V
C8100nF-63V
C910uF-25V
C101KuF-25V
IC1TDA1015

Applications:

• In-car use
• Your own unique application
• Power amplifier for audio projects
• For use with portable audio equipment
• Small but powerful multi-purpose amplifier

Special features:

• Low current drain
• High output power
• Thermal protection
• High input impedance
• Separated preamplifier and power amplifier
• Limited noise behavior at radio frequencies
• Single in-line (SIL) construction for easy mounting

Specification:

• Quiescent current : 12mA
• Thermal and short circuit protection
• Frequency Response : 60Hz - 15Khz
• Max. output power : 3W (4ohm/12V)
• Input sensitivity : 20-15mV selectable
• Power supply : 4.5 - 15V DC @ 400mA