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SSM2306,pdf datasheet

 (Class-D Audio Power Amplifie)
  • 软件大小:43KB
  • 更新日期:2009/8/27
  • 软件语言:简体中文
  • 软件类别:机械电子
  • 软件授权:共享软件
  • 软件官网:
  • 适用平台:Vista, Win2003, WinXP, Win2000, NT

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    The SSM2306 is a fully integrated, high efficiency, Class-D stereo audio amplifier designed to maximize performance for portable applications. The application circuit requires minimum external components and operates from a single 2.5 V to 5.0 V supply. It is capable of delivering 2 W of continuous output power with less than 10% THD + N driving a 4 Ω load from a 5.0 V supply.

    The SSM2306 features ultralow idle current, high efficiency, and a low noise modulation scheme. It operates with >87% efficiency at 1.4 W into 8 Ω from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is better than 96 dB. PDM modulation offers lower EMI radiated emissions compared to other Class-D architectures.

    The SSM2306 has a micropower shutdown mode with a typical shutdown current of 20 nA. Shutdown is enabled by applying a logic low to the SD pin.

    The architecture of the device allows it to achieve a very low level of pop and click to minimize voltage glitches at the output during turn-on and turn-off, thereby reducing audible noise on activation and deactivation. The fully differential input of the SSM2306 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the dc input common-mode voltage is approximately VDD/2.

    The SSM2306 also has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification.

    The SSM2306 has a preset gain of 18 dB that can be reduced by using external resistors.

    The SSM2306 is specified over the commercial temperature range (−40°C to +85°C). It has built-in thermal shutdown and output short-circuit protection. It is available in a 16-lead, 3 mm × 3 mm lead frame chip scale package (LFCSP).

    Applications

    • Mobile phones
    • MP3 players
    • Portable gaming
    • Portable electronics
    • Educational toys
    • Notebook computers

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