TPA741DGNRG4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Class AB
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	700mW x 1 @ 8 Ohm
Voltage - Supply:	2.5 V ~ 5.5 V
Features:	Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	8-MSOP-PowerPad
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
Base Part Number:	TPA741

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Introduction

The TPA741DGNRG4 is a linear amplifier designed for audio applications. It is part of Texas Instruments’ family of audio amplifiers, which provides high-efficiency, low power consumption and excellent sound quality, making it ideal for use in consumer and professional audio products. The TPA741DGNRG4 is capable of delivering up to 81 Watts of power over 1.5 Ohms of impedance, and features a wide bandwidth, low harmonic distortion and low noise, making it an excellent choice for applications where audio performance is critical. In addition, the amplifier includes a built-in thermal protection circuit and a low-battery-indication circuit, making it an all-in-one solution for audio products.

Application field

The TPA741DGNRG4 has a wide range of applications, from high-end home theater systems and professional studio equipment, to portable audio devices and car audio systems. Its 81 watts of power output make it ideal for driving small and medium-sized speaker systems, and its low distortion, wide frequency response and low noise make it a great choice for applications requiring low-noise, high-quality audio reproduction. The amplifier is also suitable for driving subwoofers, powered monitors and other applications requiring high-power output and superior sound reproduction.

Working principle

The TPA741DGNRG4 is a two-stage class-AB amplifier, consisting of an input stage with two differential pairs of circuit elements, and an output stage with two paralleled power output stages.The input stage consists of two differential pairs of high-frequency, high-voltage BJTs, coupled together with two inductors in the Emitter circuit of each BJT. This configuration provides a high common-mode gain and eliminates common-mode noise. The differential inputs also provide high input impedance, which helps reduce power dissipation due to input-loading.The output stage consists of two paralleled power output stages, each consisting of four complementary pairs of BJTs, connected in a Darlington configuration. The Darlington configuration provides a high output-driving current capability, making it ideal for driving speaker systems. The output stage also features a low-frequency compensation network, provided by the inductor in the Emitter-Emitter circuit of the Darlington’s first stage, which ensures excellent linearity and stability in the audio band.

Conclusion

The TPA741DGNRG4 is a high-efficiency, low-noise, high-power linear amplifier designed for audio applications. Its wide-bandwidth, low-harmonic distortion and low noise characteristics make it ideal for use in consumer and professional audio products, while its 81 watts of power output make it suitable for driving small and medium-sized speaker systems. The amplifier also includes a built-in thermal protection circuit and a low-battery-indication circuit, making it an all-in-one solution for audio products.

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