Product details


Audio input type Analog Input Architecture Class-AB Speaker channels (Max) Mono Power stage supply (Max) (V) 5.5 Power stage supply (Min) (V) 2 Load (Min) (ohms) 8 Output power (W) 0.35 SNR (dB) 102 THD + N @ 1 kHz (%) 1 Iq (Typ) (mA) 1.5 Control interface Hardware Closed/open loop Closed Analog supply (Min) (V) 2 Analog supply (Max) (V) 5.5 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (NGL) 8 6 mm² 2.5 x 2.5 open-in-new Find other Speaker amps


  • WSON, SOIC, and VSSOP Surface Mount Packaging
  • Switch On/Off Click Suppression
  • Unity-Gain Stable
  • Minimum External Components

Key Specifications

  • THD+N at 1kHz, 350mW Continuous Average Output Power into 16Ω: 10% (max)
  • THD+N at 1kHz, 300mW Continuous Average Output Power into 8Ω: 10% (max)
  • Shutdown Current: 0.7μA (typ)

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The LM4819 is a mono bridged power amplifier that is capable of delivering 350mWRMS output power into a 16Ω load or 300mWRMS output power into an 8Ω load with 10% THD+N from a 5V power supply.

The LM4819 Boomer audio power amplifier is designed specifically to provide high quality output power and minimize PCB area with surface mount packaging and a minimal amount of external components. Since the LM4819 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally suited for low-power portable applications.

The closed loop response of the unity-gain stable LM4819 can be configured using external gain-setting resistors. The device is available in WSON, VSSOP, and SOIC package types to suit various applications.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM4819  350mW Audio Power Amplifier with Shutdown Mode datasheet (Rev. D) Mar. 21, 2013

Design & development

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

Hardware development


The LM4819 is a mono bridged power amplifier that is capable of delivering 350mWRMS output power into a 16Ω load or 300mWRMS output power into an 8Ω load with 10% THD+N from a 5V power supply.

This LM4819MBD is an evaluation board designed to ease the evaluation and effort during the development of a (...)

  • Available in SOP surface mount package.
  • Switch on/off click suppression.
  • Unity-gain stable.
  • Minimum external components.


  • General purpose audio
  • Portable electronic devices
  • Information Appliances (IA)


Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Camera Reference Design for ARM® Cortex®-M Microcontrollers (MCUs)
TIDM-TM4C129CAMERA This design implements a network camera with a QVGA display panel and an embedded web server for remote monitoring.  With a memory footrpint of 250KB for the web server, there is ample memory available on the TM4C129x microcontroller for additional customizations.
document-generic Schematic
Audio Communication With Power Over Ethernet (PoE) Reference Design
TIDM-TM4C129POEAUDIO — This design uses Texas Instrument's high performance TM4C129x microcontrollers (MCUs) with integrated Ethernet PHY to capture, exchange and playback audio efficiently with power supplied over the network (PoE solution) instead of separate external power sources. The application uses TivaWare (...)
document-generic Schematic
Connected Ethernet, USB, and LCD Reference Design
TIDM-CONNECTED-ETHERNET This TI Design will demonstrate several ethernet- and LCD-enabled applications such as remote sensor monitoring, ethernet configuration via web-based and LCD dashboards and aware applications that interface with weather websites.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options
WSON (NGL) 8 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

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