LM1875 power amplifier

The LM1875 is a high-performance audio power amplifier IC designed for audio applications requiring moderate power output and excellent sound quality. Manufactured by Texas Instruments, this IC operates as a monolithic power amplifier capable of delivering up to 20 watts of output power into an 8-ohm load with low distortion. The LM1875 is designed to be used in audio amplification systems for hi-fi stereo amplifiers, home theater systems, and other audio equipment where reliable and high-quality sound reproduction is critical.

Key Features:

• Power Output: Up to 20 watts into an 8-ohm load at ±25V supply voltage
• Low Total Harmonic Distortion (THD): 0.015% (typical) at 1 kHz, 20 watts
• Wide Supply Voltage Range: ±16V to ±60V
• High Signal-to-Noise Ratio (SNR): 95 dB (typical)
• Short Circuit Protection: Ensures robustness against load faults
• Thermal Shutdown Protection: Protects against overheating
• External Components: Minimal external components required for operation
• Package Type: TO-220-11 (single in-line package)

Technical Specifications:

• Output Power: Up to 20W into 8 ohms, 30W into 4 ohms (with proper heat sinking)
• Supply Voltage Range: ±16V to ±60V (recommended ±25V)
• Input Impedance: 150 kΩ (typical)
• Frequency Response: 10 Hz to 100 kHz (-3 dB)
• Total Harmonic Distortion + Noise (THD+N): 0.015% at 1 kHz, 20W into 8 ohms
• Slew Rate: 4V/µs (typical)
• Operating Temperature Range: 0°C to +70°C

Applications:

• Audio Amplifiers: Hi-fi stereo amplifiers, home theater systems, and PA systems.
• Active Speakers: Powered speakers and studio monitors.
• Instrumentation: Test and measurement equipment requiring audio amplification.
• Consumer Electronics: Audio equipment for home and professional use.
• DIY Audio Projects: Custom audio amplifier designs and hobbyist projects.

Datasheet:
For detailed technical information, refer to the LM1875 Audio Power Amplifier Datasheet.