electronic circuit amplifier

The LM380 is a power audio amplifier designed for consumer applications. To minimize system costs, the gain is internally fixed at 34 dB. It features a unique input stage that allows for ground-referenced input signals. The output automatically self-centers to half the supply voltage. Additionally, the output is short circuit proof and includes internal thermal limiting. The package outline is a standard dual-in-line configuration. The LM380N model utilizes a copper lead frame, with the center three pins on either side functioning as a heat sink, facilitating its integration into standard printed circuit board (PCB) layouts. Typical applications include simple phonograph amplifiers, intercoms, line drivers, teaching machine outputs, alarms, ultrasonic drivers, television sound systems, AM-FM radios, small servo drivers, and power converters.

The LM380 power audio amplifier is specifically engineered for consumer electronics, emphasizing cost-effectiveness and ease of integration. The fixed gain of 34 dB simplifies circuit design, as external components for gain adjustment are unnecessary. This feature makes the LM380 particularly suitable for applications where consistent audio amplification is required without the need for user intervention.

The unique input stage of the LM380 allows for ground-referenced signals, which enhances compatibility with various audio sources. This design choice is critical for ensuring minimal noise and distortion, thereby improving overall audio quality. The self-centering output capability, which stabilizes at half the supply voltage, ensures that the amplifier can handle a variety of input signal levels without distortion or clipping.

Safety features such as short circuit protection and internal thermal limiting are integrated into the LM380 to enhance reliability, making it suitable for long-term use in consumer devices. The dual-in-line package design, with its copper lead frame, not only provides an effective thermal management solution through the heat sink configuration but also promotes ease of assembly on standard PCBs. This aspect is particularly beneficial for manufacturers looking to streamline production processes.

The versatility of the LM380 is evident in its wide range of applications. It is commonly used in phonograph amplifiers, which require high fidelity sound reproduction, as well as in intercom systems where clear audio communication is essential. Furthermore, its role as a line driver and in teaching machines illustrates its adaptability in educational settings. The amplifier's use in alarms and ultrasonic drivers showcases its capability to operate in specialized applications, while its integration into TV sound systems and AM-FM radios highlights its importance in consumer audio products.

In summary, the LM380 power audio amplifier stands out for its combination of fixed gain, unique input design, and robust safety features, making it a reliable choice for a variety of consumer electronic applications.The LM380 is a power audio amplifier for consumer applications. In order to hold system cost to a minimum, gain is internally fixed at 34 dB. A unique input stage allows ground referenced input signals. The output automatically self-centers to one-half the supply voltage. The output is short circuit proof with internal thermal limiting. The packag e outline is standard dual-in-line. The LM380N uses a copper lead frame. The center three pins on either side comprise a heat sink. This makes the device easy to use in standard PC layouts. Uses include simple phonograph amplifiers, intercoms, line drivers, teaching machine outputs, alarms, ultrasonic drivers, TV sound systems, AM-FM radio, small servo drivers, power converters, etc. 🔗 External reference