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          帕智電子(上海)有限公司

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          SGM4809

          Dual 158mW Headphone Amplifier with Active Low Shutdown Mode
           
          Dual 158mW Headphone Amplifier with Active Low Shutdown Mode
          GENERAL DESCRIPTION

          The SGM4809 is a dual audio power amplifier capable of delivering 158mW per channel of continuous average power with typically 0.1% distortion (THD+N) when it drives a 16Ω speaker from a 5.0V power supply. It is designed to maximize audio performance in portable applications such as mobile phone. The portable application requires audio power amplifier has minimum of external components and can operate from a single 2.5V to 5.5V power supply.

          SGM4809 features an externally controlled, active-low, micro-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.

          SGM4809 does not require bootstrap capacitors or snubber networks. It is optimally suited for low power portable systems.

          For maximum flexibility, the SGM4809 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on time (with the bypass capacitor).

          The SGM4809 is available in a Green MSOP-8 package. It operates over an ambient temperature range of -40 to +85.

          PIN CONFIGURATIONS

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          FEATURES
          • Active-Low Shutdown Mode

          • 158mW into 16Ω Load from 5V Power Supply at THD+N = 0.1% (Typical, per Channel)

          • 87mW into 32Ω Load from 5V Power Supply at THD+N = 0.1% (Typical, per Channel)

          • Unity Gain Stable

          • Shutdown Current: 0.6μA (TYP)

          • 2.5V to 5.5V Operation

          • Shutdown Pin is Compatible with 1.8V Logic

          • Pop/Click Reduction Circuitry

          • -40 to +85 Operating Temperature Range

          • Available in a Green MSOP-8 Package

          APPLICATIONS

          Portable Systems
          Headphone Amplifier
          Microphone Preamplifier
          Notebook Computers
          Mobile Phone
          PDAs
          GPS

          ORDERING INFORMATION
          Part NumberStatusPackagePinsPb-FreeTemp Range
          SGM4809YMS/TRProductionMSOP-88Y-40℃ to +85℃

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