圣邦微电子

SGM4809 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 Green MSOP-8 package. It operates over an ambient temperature range of -40 to +85.


PIN CONFIGURATIONS


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 Green MSOP-8 Package

APPLICATIONS

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


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM4809YMS/TR Production MSOP-8 8 Y -40℃ to +85℃ Samples

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