Series:	Boomer®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Class D
Output Type:	1-Channel (Mono)
Max Output Power x Channels @ Load:	1.3W x 1 @ 8 Ohm
Voltage - Supply:	2.7 V ~ 5.5 V
Features:	Depop, Differential Inputs, Short-Circuit Protection, Shutdown
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	10-VSSOP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Base Part Number:	LM4667

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LM4667MM Application Field and Working Principle

Introduction

The LM4667MM is a high-performance, low-power audio system amplifier produced by Texas Instruments. It provides cost-effective solutions for applications related to both speakers and microphones, and is an ideal choice for audio development. This article discusses the application fields and working principle of LM4667MM audio systems amplifiers.

Application Fields

The LM4667MM audio amplifier integrates two audio systems whose outputs can be used independently or combined together to form a single signal amplification signal. The gain can be digitally adjusted, and the output power varies with the signal level. This audio system amplifier is ideal for applications such as audio signal restoration, active noise cancellation, audio output amplification, and multi-channel signal processing. In addition, its high-performance, low-power consumption makes it an ideal choice for audio applications in low-power sources such as portable devices.

Working Principle

The LM4667MM audio amplifier uses an enhanced Class D amplifier topology that enables high efficiency and low distortion as well as low frequency response characteristics. The amplifier\'s input signal passes through a low-noise input stage, after which it is converted to a digital signal using a pulse width modulated (PWM) signal. In addition, the amplifier offers a flexible output stage with adjustable gain and output current allowing the user to adjust the power according to the application need. The output voltage is regulated and monitored by an integrated analog-to-digital converter (ADC) allowing the system to remain in a stable state. The amplifier output can be used in both single-ended and balanced applications.

Conclusion

The LM4667MM audio amplifier offers an ideal solution for audio system amplifications. It is a low-power, highly-efficient device that is suitable for a variety of applications such as audio signal restoration, active noise cancellation, audio output amplification, and multi-channel signal processing. Furthermore, its adjustable gain and output current capabilities allow the user to adjust the output power. The LM4667MM audio system amplifier is an ideal choice for audio development in portable devices.

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