回到顶部

单声道/立体声、2W、开关模式(D类)音频功率放大器

产品详情

主要特征

简化框图

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心

主要特征

  • +2.7V to +5.5V Single-Supply Operation
  • 2W/Channel Output Power at 5V
  • 0.7W/Channel Output Power at 3V
  • 87% Efficiency (RL = 4Ω, POUT = 2W)
  • 0.4% THD+N (RL = 4Ω, fOSC = 125kHz)
  • Logic-Programmable PWM Frequency Selection (125kHz, 250kHz, 500kHz, 1MHz)
  • Low-Power Shutdown Mode
  • Clickless Transitions Into and Out of Shutdown
  • 1A Current Limit and Thermal Protection
  • Available in Space-Saving Packages
    • 16-Pin QSOP or Narrow SO

应用/用途

  • AC放大器
  • 电池供电扬声器
  • 音箱
  • 无绳电话
  • 游戏卡
  • 掌上电脑/笔记本电脑
  • PDA音频
  • 便携式设备
  • 声卡

描述

The MAX4295 mono, switch-mode (Class D) audio power amplifier operates from a single +2.7V to +5.5V supply. The MAX4295 has > 85% efficiency and is capable of delivering 2W continuous power to a 4Ω load, making it ideal for portable multimedia and general-purpose high-power audio applications.

The MAX4295 features a total harmonic distortion plus noise (THD+N) of 0.4% (fOSC = 125kHz), low quiescent current of 2.8mA, high efficiency, and clickless power-up and shutdown. The active-low SHDN input disables the device and limits supply current to < 1.5µA. Other features include a 1A current limit, thermal protection, and undervoltage lockout.

The MAX4295 reduces the number of required external components. Internal high-speed power-MOS transistors allow operation as a bridge-tied load (BTL) amplifier. The BTL configuration eliminates the need for isolation capacitors on the output. The frequency-selectable pulse-width modulator (PWM) allows the user to optimize the size and cost of the output filter.

The MAX4295 is offered in a space-saving 16-pin QSOP or narrow SO package.

简化框图

MAX4295:典型工作电路 MAX4295:典型工作电路 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心