Inicio Audio, háptica y piezoeléctrica Amplificadores de audio Amplificadores de audio de uso general
Inicio
Audio, háptica y piezoeléctrica
Amplificadores de audio
Amplificadores de audio de uso general

LM49251

ACTIVO

Amplificador de audio estéreo de Clase AB, entrada analógica y 1.37 W, con amplificador de auricular

Haga su pedido ahora
Hoja de datos

LM49251

ACTIVO
Hoja de datos Haga su pedido ahora

Detalles del producto

Audio input type Analog Input Architecture Class-D Speaker channels (max) Stereo Control interface I2C Output power (W) 1.37 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.7 THD + N at 1 kHz (%) 0.02 Load (min) (Ω) 4 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-D Speaker channels (max) Stereo Control interface I2C Output power (W) 1.37 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.7 THD + N at 1 kHz (%) 0.02 Load (min) (Ω) 4 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YZR) 30 8.9375 mm² (— mm × — mm)
  • Class G Ground Referenced Headphone Outputs
  • E2S Class D Amplifier
  • No Clip Function
  • Power Limiter Speaker Protection
  • I2C Volume and Mode Control
  • Advanced Click-and-Pop Suppression
  • Micro-Power Shutdown

Key Specifications

  • Class G Headphone Amplifier, HPVDD = 1.8V, RL = 32Ω
    • IDDQHP: 1.15 mA (Typ)
    • Output Power, THD+N ≤ 1%: 20 mW (Typ)
  • Stereo Class D Speaker Amplifier RL = 8Ω
    • Output Power, THD+N ≤ 1%, LSVDD = 5.0V: 1.37 W (Typ)
    • Output Power, THD+N ≤ 1%, LSVDD = 3.6V: 680 mW (Typ)
    • Efficiency: 90% (Typ)

All trademarks are the property of their respective owners.

  • Class G Ground Referenced Headphone Outputs
  • E2S Class D Amplifier
  • No Clip Function
  • Power Limiter Speaker Protection
  • I2C Volume and Mode Control
  • Advanced Click-and-Pop Suppression
  • Micro-Power Shutdown

Key Specifications

  • Class G Headphone Amplifier, HPVDD = 1.8V, RL = 32Ω
    • IDDQHP: 1.15 mA (Typ)
    • Output Power, THD+N ≤ 1%: 20 mW (Typ)
  • Stereo Class D Speaker Amplifier RL = 8Ω
    • Output Power, THD+N ≤ 1%, LSVDD = 5.0V: 1.37 W (Typ)
    • Output Power, THD+N ≤ 1%, LSVDD = 3.6V: 680 mW (Typ)
    • Efficiency: 90% (Typ)

All trademarks are the property of their respective owners.

The LM49251 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI’s PowerWise family of products, the LM49251 utilizes a high efficiency class G headphone amplifier topology as well as a high efficiency class D loudspeaker.

The headphone amplifiers feature TI’s class G ground referenced architecture that creates a ground-referenced output with dynamic supply rails for optimum efficiency. The stereo class D speaker amplifier provides both a no-clip feature and speaker protection. The Enhanced Emission Suppression (E2S) outputs feature a patented, ultra low EMI PWM architecture that significantly reduces RF emissions.

The LM49251 features separate volume controls for the mono and stereo inputs. Mode selection, shutdown control, and volume are controlled through an I2C compatible interface.

Click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49251 is available in an ultra-small 30-bump DSBGA package (2.55mmx3.02mm)

The LM49251 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI’s PowerWise family of products, the LM49251 utilizes a high efficiency class G headphone amplifier topology as well as a high efficiency class D loudspeaker.

The headphone amplifiers feature TI’s class G ground referenced architecture that creates a ground-referenced output with dynamic supply rails for optimum efficiency. The stereo class D speaker amplifier provides both a no-clip feature and speaker protection. The Enhanced Emission Suppression (E2S) outputs feature a patented, ultra low EMI PWM architecture that significantly reduces RF emissions.

The LM49251 features separate volume controls for the mono and stereo inputs. Mode selection, shutdown control, and volume are controlled through an I2C compatible interface.

Click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49251 is available in an ultra-small 30-bump DSBGA package (2.55mmx3.02mm)
filter Buscar otro/a Amplificadores de audio de uso general
Descargar Ver vídeo con transcripción Video

Documentación técnica

No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 1
Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Stereo Audio w/Class G Headphone Amp & Class D Speaker Amp w/Speaker Protection datasheet (Rev. A) 6/04/2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YZR) 30 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

Ver todos los temas del foro en inglés

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene alguna pregunta sobre calidad, encapsulados o pedido de productos de TI, consulte el servicio de asistencia de TI. ​​​​​​​​​​​​​​

Videos