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LM4990

ACTIVE

2-W mono, analog input Class-AB audio amplifier

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Data sheet

LM4990

ACTIVE
Data sheet Order now

Product details

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Control interface Hardware Output power (W) 2 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 THD + N at 1 kHz (%) 0.2 Load (min) (Ω) 4 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Control interface Hardware Output power (W) 2 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 THD + N at 1 kHz (%) 0.2 Load (min) (Ω) 4 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YZR) 9 3.0625 mm² (— mm × — mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm) HVSSOP (DGQ) 10 14.7 mm² (3 mm × 4.9 mm)
  • Available in Space-Saving Packages: WSON, Exposed-DAP MSOP-PowerPAD, VSSOP, and DSBGA
  • Ultra Low Current Shutdown Mode
  • Improved Click and Pop Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Unity-Gain Stable
  • External Gain Configuration Capability
  • User Selectable Shutdown High or Low Logic Level

Key Specifications

  • Improved PSRR at 217Hz & 1KHz: 62dB
  • Power Output at 5.0V, 1% THD+N,
    • 4Ω (NGZ and DGQ only): 2W (Typ)
  • Power Output at 5.0V, 1% THD+N, 8Ω: 1.25W (Typ)
  • Power Output at 3.0V, 1% THD+N, 4Ω: 600mW (Typ)
  • Power Output at 3.0V, 1% THD+N, 8Ω: 425mW (Typ)
  • Shutdown Current: 0.1µA (Typ)

All trademarks are the property of their respective owners.

  • Available in Space-Saving Packages: WSON, Exposed-DAP MSOP-PowerPAD, VSSOP, and DSBGA
  • Ultra Low Current Shutdown Mode
  • Improved Click and Pop Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Unity-Gain Stable
  • External Gain Configuration Capability
  • User Selectable Shutdown High or Low Logic Level

Key Specifications

  • Improved PSRR at 217Hz & 1KHz: 62dB
  • Power Output at 5.0V, 1% THD+N,
    • 4Ω (NGZ and DGQ only): 2W (Typ)
  • Power Output at 5.0V, 1% THD+N, 8Ω: 1.25W (Typ)
  • Power Output at 3.0V, 1% THD+N, 4Ω: 600mW (Typ)
  • Power Output at 3.0V, 1% THD+N, 8Ω: 425mW (Typ)
  • Shutdown Current: 0.1µA (Typ)

All trademarks are the property of their respective owners.

The LM4990 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8Ω BTL load and 2 watts of continuous average power (NGZ and DGQ only) to a 4Ω BTL load with less than 1% distortion (THD+N+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 LM4990 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 LM4990 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown pin to be driven in a likewise manner to enable shutdown.

The LM4990 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions.

The LM4990 is unity-gain stable and can be configured by external gain-setting resistors.

The LM4990 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8Ω BTL load and 2 watts of continuous average power (NGZ and DGQ only) to a 4Ω BTL load with less than 1% distortion (THD+N+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 LM4990 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 LM4990 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown pin to be driven in a likewise manner to enable shutdown.

The LM4990 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions.

The LM4990 is unity-gain stable and can be configured by external gain-setting resistors.

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* Data sheet LM4990  2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level datasheet (Rev. E) May 2, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Package Pins CAD symbols, footprints & 3D models
DSBGA (YZR) 9 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
HVSSOP (DGQ) 10 Ultra Librarian
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