LM4946

ACTIVO

Amplificador de audio mono de 540 mW y estéreo de 35 mW de Clase AB y entrada analógica con interfaz

Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 85
Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RTW) 24 16 mm² 4 x 4

  • I 2 C/SPI Control Interface
  • I 2 C/SPI programmable National 3D Audio
  • I 2 C/SPI controlled 32 step digital volume control (-54dB to +18dB)
  • Three independent volume channels (Left, Right, Mono)
  • Eight distinct output modes
  • LLP and microSMD surface mount packaging
  • “Click and Pop” suppression circuitry
  • Thermal shutdown protection
  • Low shutdown current (0.02uA, typ)
  • RF immunity topology

  • I 2 C/SPI Control Interface
  • I 2 C/SPI programmable National 3D Audio
  • I 2 C/SPI controlled 32 step digital volume control (-54dB to +18dB)
  • Three independent volume channels (Left, Right, Mono)
  • Eight distinct output modes
  • LLP and microSMD surface mount packaging
  • “Click and Pop” suppression circuitry
  • Thermal shutdown protection
  • Low shutdown current (0.02uA, typ)
  • RF immunity topology

  • The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.

    The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I 2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels.

    The LM4946 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode).


    Key Specifications

    THD+N at 1kHz, 540mW into 8Ω BTL (3.3V) 1.0% (typ)
    THD+N at 1kHz, 35mW into 32Ω SE (3.3V) 1.0% (typ)
    Single Supply Operation (VDD) 2.7 to 5.5V
    I 2C/SPI Single Supply Operation  
    LLP 2.2 to 5.5V
    micro SMD 1.7 to 5.5V

    The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.

    The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I 2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels.

    The LM4946 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode).


    Key Specifications

    THD+N at 1kHz, 540mW into 8Ω BTL (3.3V) 1.0% (typ)
    THD+N at 1kHz, 35mW into 32Ω SE (3.3V) 1.0% (typ)
    Single Supply Operation (VDD) 2.7 to 5.5V
    I 2C/SPI Single Supply Operation  
    LLP 2.2 to 5.5V
    micro SMD 1.7 to 5.5V

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    Documentación técnica

    star =Principal documentación para este producto seleccionada por TI
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    Tipo Título Fecha
    * Data sheet LM4946 Output Capacitor-Less Audio Subsystem with Programmable TI 3D datasheet (Rev. E) 01 ago 2007
    Application note AN-1496 Noise, TDMA Noise, and Suppression Techniques (Rev. D) 01 may 2013

    Diseño y desarrollo

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    Herramienta de simulación

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    Paquete Pasadores Descargar
    WQFN (RTW) 24 Ver opciones

    Pedidos y calidad

    Información incluida:
    • RoHS
    • REACH
    • Marcado del dispositivo
    • Acabado de plomo/material de la bola
    • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
    • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
    • Contenido del material
    • Resumen de calificaciones
    • Monitoreo continuo de confiabilidad
    Información incluida:
    • Lugar de fabricación
    • Lugar de ensamblaje

    Soporte y capacitación

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