MAX9762ETI+T

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The MAX9762ETI+T is a high-performance, stereo audio power amplifier for driving loudspeakers. This integrated, mono audio power amplifier is capable of delivering up to 150 watts in each channel into a 4Ω load, or 50 watts of continuous average power into an 8Ω load with 0.1 % THD+N. It features an advanced, high-efficiency Class-G architecture that combines a 500 mW class AB amplifier with a 1.5 A switch-mode amplifier. The Class-G architecture maximizes the efficiency of the audio power amplifier while offering superior performance in both the frequency response and transient response. The integration of the Class-G amplifier reduces external component count and simplifies the design of the audio power amplifier.

The MAX9762ETI+T features an integrated, low-noise input buffer for superior signal-to-noise performance. An adjustable loop filter provides flexibility to customize the low-frequency energy for speakers with different characteristics. The output-stage cross-conduction detector helps ensure that the output connection is safely protected and fault tolerant. The circuit is assembled in a 16-pin, TQFN package which is lead-free and RoHS compliant. The amplifier also features a thermal shutdown and power-saving standby mode.

The MAX9762ETI+T can be used in a variety of audio applications, such as portable speakers, multimedia sound systems and home-theater systems. It is suitable for driving small and medium-size speakers, such as 4Ω, 8Ω and 16Ω speakers. The device can be used with a variety of other amplifier components, such as line drivers, preamplifiers, high-pass filters, low-pass filters and crossovers. The low-noise input buffer and adjustable loop filter make it easy to customize the audio power amplifier’s frequency response for a variety of speaker types.

The MAX9762ETI+T works on the principles of Class-G amplification. Class-G audio amplifiers feature an integrated switch-mode amplifier (SMA) which allows the output power of the amplifier to be adjusted by varying the switching frequency of the SMA. The SMA provides additional gain to the amplifier when higher levels of output power are needed, while also providing a more efficient power supply as lower levels of output power are used. When the audio input level is low, the SMA draws less current and the amplifier operates in Class-B mode – this allows the amplifier to achieve a high efficiency rate at low volumes. When the audio input level is high, the SMA draws more current and the amplifier operates in Class-B/AB mode – this allows the amplifier to achieve a high power output and excellent frequency response.

In addition to the high-performance, stereo audio power amplifier, the MAX9762ETI+T is also capable of driving higher-impedance loads, such as 16Ω speakers. This is accomplished using an advanced, adjustable loop filter which is optimized for 16Ω speakers. The adjustable loop filter ensures that the amplifier has a stable operating point and can drive high-impedance loads without distortion. The adjustable loop filter also allows the amplifier to drive 4Ω, 8Ω and 16Ω speakers with equal efficiency.

The MAX9762ETI+T is an advanced, high-performance audio power amplifier that is capable of delivering up to 150 watts of continuous average power into a 4Ω load with 0.1 % THD+N. It features an integrated, mono audio power amplifier with an advanced, high-efficiency Class-G architecture. It also features an integrated, low-noise input buffer and adjustable loop filter which provide superior signal-to-noise performance and flexibility to customize the low-frequency energy for speakers with different characteristics. The integration of the Class-G amplifier reduces external component count and simplifies the design of the audio power amplifier, making it suitable for a wide range of audio applications including portable speakers, multimedia sound systems and home-theater systems.

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