MAX9750BETI+T

Updated: 2026-09-16

Overview

The MAX9750BETI+T is a Class D audio amplifier integrated circuit (IC) manufactured by Maxim Integrated. It is designed to deliver high-efficiency audio amplification with minimal power consumption, making it suitable for battery-powered and portable devices. The IC features a compact form factor and integrates several protection mechanisms, including thermal shutdown and overcurrent protection. This amplifier is widely used in consumer electronics such as smartphones, tablets, and portable speakers, as well as in automotive and industrial audio systems. Its ability to operate at low voltages and high efficiencies makes it a preferred choice for applications where power conservation is critical.

Structure and Working Principle

The MAX9750BETI+T operates as a Class D amplifier, which uses pulse-width modulation (PWM) to convert analog audio signals into digital pulses. These pulses are then amplified and filtered to reproduce the original audio signal with high fidelity. The IC includes a built-in MOSFET driver and output stage, reducing the need for external components. The amplifier's efficiency is achieved by minimizing power loss during signal amplification, typically exceeding 90% efficiency. This is particularly advantageous in battery-operated devices, where extended playback time is essential. The IC also features a shutdown mode to further reduce power consumption when not in use.

Key Features

The MAX9750BETI+T offers several standout features, including high output power (up to 2.8W per channel into 4Ω loads), low quiescent current, and a wide supply voltage range (2.7V to 5.5V). Its integrated protection circuits safeguard against overcurrent, overtemperature, and undervoltage conditions. Additionally, the amplifier supports differential inputs, reducing common-mode noise and improving audio quality. Its small footprint and minimal external component requirements make it easy to integrate into compact designs. These features collectively enhance performance and reliability in demanding audio applications.

Application Areas

The MAX9750BETI+T is versatile and finds use in various audio amplification scenarios. In consumer electronics, it powers speakers in smartphones, tablets, and portable media players. Automotive applications include in-car entertainment systems and navigation devices, where space and power efficiency are paramount. Industrial applications leverage the amplifier for public address systems, intercoms, and other audio equipment requiring robust performance. Its ability to operate in harsh environments, coupled with low power consumption, makes it a reliable choice for industrial audio solutions.

Maintenance and Precautions

To ensure optimal performance and longevity, proper thermal management is essential when using the MAX9750BETI+T. Adequate heat sinking or ventilation should be provided, especially in high-power applications. The IC should be operated within its specified voltage range to prevent damage. Electrostatic discharge (ESD) protection measures should be observed during handling and installation. Additionally, designers should follow the manufacturer's layout guidelines to minimize noise and ensure signal integrity. Regular testing and monitoring can help identify potential issues early.

B2B Procurement Guide

When procuring the MAX9750BETI+T, buyers should verify the supplier's authenticity to avoid counterfeit components. Authorized distributors or direct purchases from Maxim Integrated are recommended. Bulk orders may qualify for discounts, but lead times should be confirmed in advance. Designers should ensure compatibility with their specific application requirements, including power supply, load impedance, and thermal constraints. Sample testing is advisable to validate performance before large-scale procurement. Pricing can vary based on order volume and market conditions.