LM3875T

Series:	Overture™
Packaging:	Tube
Part Status:	Obsolete
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	56W x 1 @ 8 Ohm
Voltage - Supply:	20 V ~ 84 V, ±10 V ~ 42 V
Features:	Short-Circuit and Thermal Protection
Mounting Type:	Through Hole
Operating Temperature:	-20°C ~ 85°C (TA)
Supplier Device Package:	TO-220-11
Package / Case:	TO-220-11 (Formed Leads)
Base Part Number:	LM3875

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LM3875T Application Field and Working Principle

The LM3875T is a high-performance audio power amplifier designed specifically for off-board power applications. It is intended for use in Class AB audio power amplifiers with operating class B audio power amplifiers of up to 150W. This IC from the Texas Instruments series of power audio amplifiers is incredibly versatile and suitable for many different applications.

Application Field of the LM3875T

The LM3875T is a power amplifier that was specifically designed for pick-up amplifiers, systems and other applications that require high-power audio amplification. These amplifiers are capable of delivering up to 150 watts of power to drive large loudspeakers. This makes them ideal for public address systems, as well as PA systems for bands or mobile DJ’s.The LM3875T is designed for use with class-B type power amplifiers, meaning that the output power of the amplifier is determined by the load rating of the components. In other words, the more power that is drawn from the amplifier, the greater the output power that is available. This makes the LM3875T amplifier highly efficient and its output power can be accurately set via the component configuration. It is also very robust and can be adapted to the specific needs of the user. This amplifier is suitable for installation in homes, cars, PA systems and many more places.The LM3875T is also well known for its low distortion and low noise floor. This allows it to deliver accurate and powerful sound with minimal distortion, producing high-quality audio.

Working Principle of the LM3875T

The LM3875T is a power amplifier based on a closed loop, cascade architecture. It uses a high-voltage control voltage feedback network to ensure that the amplifier is always working at its maximum efficiency. The amplifier’s input is provided by a low-voltage signal from the source, which is then amplified by the LM3875T.The LM3875T operates using two main stages: the driver stage and the output stage. The driver stage amplifies the input signal before it is sent to the output stage. The output stage then amplifies the signal and produces the level of power required. The power is then passed through a protection circuit to ensure that the power is spreading over the entire area of the speakers.The LM3875T also has a number of protection features. These features help to protect the amplifier and prevent damage due to short circuiting, overvoltage and overcurrent. These features help to ensure that the amplifier operates safely and reliably, even when subjected to a range of potentially damaging situations.The LM3875T is an excellent choice for a power amplifier application. Its versatility, high performance and ease of use make it highly suitable for a range of different needs. Its robust design, low distortion and low noise floor make it the ideal choice for many different applications.

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