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Maxim产品 - MAX98371介绍

MAX98371 - Digital Input Class D Speaker Amplifierwith Dynamic Headroom Tracking

MAX98371是Maxim美信半导体公司的一款音频芯片产品，MAX98371是Digital Input Class D Speaker Amplifierwith Dynamic Headroom Tracking，本站介绍了MAX98371的封装应用图解、特点和优点、功能等，并给出了与MAX98371相关的Maxim元器件型号供参考。

MAX98371 - Digital Input Class D Speaker Amplifierwith Dynamic Headroom Tracking - 音频芯片 - Efficient High-Power Digital Class D for Battery-Operated Devices Requires No Programming - 美信半导体

产品概述

The MAX98371 is a high-efficiency, mono Class D audioamplifier featuring dynamic headroom tracking (DHT).DHT automatically optimizes the headroom available tothe Class D amplifier as the power supply voltage varies,due to sudden transients and declining battery life tomaintain a consistent listening experience. A wide 5.5Vto 18V supply range allows the device to reach 19W intoan 8Ω load.

The MAX98371’s flexible digital audio interface (DAI)supports I²S, left-justified, and TDM formats. The digitalaudio interface accepts 32kHz, 44.1kHz, 48kHz, 88.2kHz,and 96kHz sample rates with 16-/24-/32-bit data supportedfor all data formats. In TDM mode, the device cansupport up to 16 channels of audio data. A unique clockingstructure eliminates the need for an external MCLKsignal that is typically needed for PCM communication.This reduces pin count and simplifies board layout.

Active emissions limiting with edge rate control minimizesEMI, and eliminates the need for output filtering found intraditional Class D devices.

An 8-bit PVDD supply voltage ADC enables the DynamicHeadroom Tracking circuit. DHT optimizes audio programpeak behavior as the supply voltage varies and providesflexible user-defined parameters.

Thermal foldback protection ensures robust behaviorwhen the thermal limits of the device are exercised. Thecircuit can be enabled to automatically reduce the outputpower above a user specified temperature. This allows foruninterrupted music playback even at high ambient temperatures.Traditional thermal protection is also availablein addition to robust overcurrent protection.

All MAX98371 control is performed using a standard2-wire, I²C interface. One of sixteen slave addresses canbe selected through two, four-level address pins. The ICis available in a 0.4mm pitch, 30-bump WLP package. It isspecified over the extended, -40°C to +85°C temperaturerange.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Wide Supply Range (5.5V to 18V)
  • Dynamic Headroom Tracking Maintains a ConsistentListening Experience
  • Integrated Thermal Foldback Allows RobustOperation in a WLP Package
  • Remote Output Sensing Allows Up to 20dB THD+NImprovement When Ferrites Are Used
  • Class D Edge Rate Control Enables FilterlessOperation
  • 110dB A-Weighted Dynamic Range
  • Output Power at 1% THD+N:
  • 15.7W into 8Ω, VPVDD = 17V
  • 13.2W into 4Ω, VPVDD = 12V
  • Output Power at 10% THD+N
  • 19W into 8Ω, VPVDD = 17V
  • 15.8W into 4Ω, VPVDD = 12V
  • Speaker Amplifier Efficiency
  • 91% at 10W into 8Ω, VPVDD = 12V
  • 81% at 15W into 4Ω, VPVDD = 12V
  • Extensive Click-and-Pop Suppression
  • Space Saving, 30-Bump WLP Package (2.1mm x2.6mm x 0.6mm, 0.4mm Pitch)
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