• <xmp id="kyama">
  • 帕智電子(上海)有限公司

    400 0800 882

    產品中心

    當前位置:首頁 > 產品中心 > 圣邦微 > 音頻,視頻驅動器 > 耳機驅動器 > SGM4917

    產品中心

    SGM4917

    80mW, Capless, Stereo Headphone Amplifier with Shutdown
     
    80mW, Capless, Stereo Headphone Amplifier with Shutdown
    GENERAL DESCRIPTION

    The SGM4917 stereo headphone amplifier is designed for portable equipment where board space is at a premium. The SGM4917 uses capless architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capacitors for output, saving cost, board space, and component height. Additionally, for SGM4917B, the gain is set internally (-2V/V), further reducing component count. For SGM4917A, the gain can be adjusted by external feedback resistors.

    The SGM4917 delivers up to 80mW per channel into a 32Ω load and has low 0.02% THD+N. A -78dB power supply rejection ratio (PSRR) at 217Hz allows this device to operate from noisy digital supplies without an additional linear regulator. Comprehensive click-and- pop circuitry suppresses audible clicks and pops on startup and shutdown.

    The SGM4917 operates from a single 2.7V to 5.5V supply, consumes only 2.7mA supply current, and is specified over the extended -40 to +85 temperature range. The SGM4917 is available in a Green TQFN-3×3-16L package.

    PIN CONFIGURATIONS

    14159460526258.png

    FEATURES
    • SGM4917A: External Feedback Gain Network

      SGM4917B: Fixed -2V/V Gain

    • No Bulky DC-Blocking Capacitors Required

    • Ground-Referenced Outputs Eliminate DC-Bias Voltage on Headphone Ground Pin

    • No Degradation of Low-Frequency Response Due to Output Capacitors

    • Differential Inputs for Enhanced Noise Cancellation

    • 80mW into 32Ω Load from 5V Power Supply at THD+N = 0.1% (TYP, per Channel)

    • Low 0.02% THD+N

    • High PSRR (-78dB at 217Hz)

    • Integrated Click-and-Pop Suppression

    • 2.7V to 5.5V Single Supply Operation

    • Low Quiescent Current (2.7mA at VDD = 5V)

    • Shutdown Control

    • Under-Voltage Lockout Function

    • -40 to +85 Operating Temperature Range

    • Available in Green TQFN-3×3-16L Package

    APPLICATIONS

    Notebook PCs

    Cellular Phones

    PDAs

    MP3 Players

    Smart Phones

    Portable Audio Equipment

    ORDERING INFORMATION
    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM4917AYTQ16G/TRProductionTQFN-3×3-16L16Y-40℃ to +85℃
    SGM4917BYTQ16G/TRProductionTQFN-3×3-16L16Y-40℃ to +85℃

    香港赛马资讯