MAX9777ETI+

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Class AB
Output Type:	2-Channel (Stereo) with Stereo Headphones
Max Output Power x Channels @ Load:	2.6W x 2 @ 4 Ohm; 200mW x 2 @ 16 Ohm
Voltage - Supply:	4.5 V ~ 5.5 V
Features:	Depop, I²C, Input Multiplexer, Mute, Shutdown, Thermal Protection
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	28-TQFN (5x5)
Package / Case:	28-WFQFN Exposed Pad
Base Part Number:	MAX9777

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Introduction

The MAX9777ETI+ is a high-performance, low-power linear audio amplifier designed for mobile and portable audio applications. The device features a low quiescent current and high power efficiency, as well as an integrated shutdown and mute feature to save battery life and improve sound quality. With its simplified power requirements, it is ideal for handheld devices, such as cellular phones and mp3 players.

Applications

The MAX9777ETI+ is well suited for all cellular phone and portable audio applications, such as personal digital assistants (PDAs) and MP3 players. It is also commonly used in laptop computers and other portable audio devices. In addition, it is ideal for any audio application requiring low distortion and low quiescent power consumption.

Working Principles

The MAX9777ETI+ works based on the principle of class-D amplification. This type of amplification uses pulse-width modulation (PWM) to generate audio tones. The audio signal is converted into a series of on-off pulses, and the varying pulse widths create the desired sound. Each pulse is converted into a voltage, which is then amplified. The resulting audio signal is clean and distortion-free.The MAX9777ETI+ features a low quiescent current, allowing it to operate without draining the battery life of the device. It also features a low noise floor and a high signal-to-noise ratio, providing clear and distortion-free audio. The integrated shutdown and mute functions help to save power and reduce any potential acoustic feedback.

Conclusion

The MAX9777ETI+ is an ideal amplifier for use in mobile and portable audio applications. With its low quiescent current, high power efficiency and low noise floor, it is an ideal choice for devices such as cellular phones and mp3 players. The integrated shutdown and mute functions help to conserve battery life and improve sound quality.

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