LM3875 56W High-Performance Audio Amplifier – Datasheet

The LM3875 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8Ω load with 0.1% (THD + N) from 20 Hz–20 kHz. The performance of the LM3875, utilizing its Self Peak Instantaneous Temperature Protection Circuitry, puts 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 completely safeguarded at the output against overvoltage, Undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.

LM3875T Pinout

LM3875T Pin Configuration

Pin No	Pin Name	Description
1	V+	Positive Supply Voltage
2	NC	No Connection
3	OUTPUT	Output Pin
4	V-	Negative Supply Voltage
5	NC	No Connection
6	NC	No Connection
7	Vin+	Positive Input Voltage
8	Vin-	Negative Input Voltage
9	NC	No Connection
10	NC	No Connection
11	NC	No Connection

LM3875T Key Features

• 6W continuous average output power into 8Ω
• 100W instantaneous peak output power capability
• Signal-to-Noise Ratio >95 dB (min)
• Output protection from a short to ground or to the
• supplies via internal current limiting circuitry
• Output over-voltage protection against transients from inductive loads

Application

• Compact stereo
• Self-powered speakers
• Surround-sound amplifiers
• High-end stereo TVs

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