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LM4890

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Amplificador de potencia de audio de 1 vatio

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LM4890

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Detalles del producto

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 Load (min) (Ω) 8 Output power (W) 1.2 SNR (dB) 93 THD + N at 1 kHz (%) 0.1 Iq (typ) (mA) 5 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 PSRR (dB) 66 Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 Load (min) (Ω) 8 Output power (W) 1.2 SNR (dB) 93 THD + N at 1 kHz (%) 0.1 Iq (typ) (mA) 5 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 PSRR (dB) 66 Operating temperature range (°C) -40 to 85
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON
  • Ultra Low Current Shutdown Mode
  • BTL Output Can Drive Capacitive Loads
  • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Thermal Shutdown Protection
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.)
  • Power Output at 5.0V & 1% THD: 1W(typ.)
  • Power Output at 3.3V & 1% THD: 400mW(typ.)
  • Shutdown Current: 0.1μA(typ.)

All trademarks are the property of their respective owners.

  • Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON
  • Ultra Low Current Shutdown Mode
  • BTL Output Can Drive Capacitive Loads
  • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Thermal Shutdown Protection
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.)
  • Power Output at 5.0V & 1% THD: 1W(typ.)
  • Power Output at 3.3V & 1% THD: 400mW(typ.)
  • Shutdown Current: 0.1μA(typ.)

All trademarks are the property of their respective owners.

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4890 features an internal thermal shutdown protection mechanism.

The LM4890 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4890 is unity-gain stable and can be configured by external gain-setting resistors.

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4890 features an internal thermal shutdown protection mechanism.

The LM4890 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4890 is unity-gain stable and can be configured by external gain-setting resistors.

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Documentación técnica

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* Data sheet LM4890  1 Watt Audio Power Amplifier datasheet (Rev. L) 03 may 2013

Diseño y desarrollo

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Modelo de simulación

LM4890 PSpice Model

SNAM179.ZIP (22 KB) - PSpice Model
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Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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VSSOP (DGK) 8 Ultra Librarian
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Pedidos y calidad

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  • 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

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