Datasheet4U Logo Datasheet4U.com

LM4949 - Stereo Class D Audio Subsystem

Datasheet Summary

Description

The LM4949 is a fully integrated audio subsystem designed for stereo cell phone applications.

The LM4949 combines a 2.5W stereo Class D amplifier plus a separate 190mW stereo headphone amplifier, volume control, and input mixer into a single device.

Features

  • National’s Output Capacitor-less (OCL) architecture that eliminates the output coupling capacitors required by traditional headphone amplifiers. Additionally, the headphone amplifiers can be configured with capacitively coupled (CC)loads, or used to drive an external headphone amplifier. When configured for an external amplifier, the VDD/2 output (VOC) controls the external amplifier’s shutdown input. For improved noise immunity, the LM4949 features fully differential left, right and mono inputs.

📥 Download Datasheet

Datasheet preview – LM4949

Datasheet Details

Part number LM4949
Manufacturer National Semiconductor
File Size 1.80 MB
Description Stereo Class D Audio Subsystem
Datasheet download datasheet LM4949 Datasheet
Additional preview pages of the LM4949 datasheet.

📁 Similar Datasheet

  • LM4940 - 6W Stereo Audio Power Amplifier (Texas Instruments)
  • LM4941 - 1.25 Watt Fully Differential Audio Power Amplifier (Texas Instruments)
  • LM4941SDBD - 1.25 Watt Fully Differential Audio Power Amplifier (Texas Instruments)
  • LM4941TMBD - 1.25 Watt Fully Differential Audio Power Amplifier (Texas Instruments)
  • LM49450 - Class D Audio SubSystem (Texas Instruments)
  • LM4946 - Output Capacitor-Less Audio Subsystem (Texas Instruments)
  • LM4947 - Mono Class D and Stereo Audio Sub-System (Texas Instruments)
  • LM4947TLEVAL - Mono Class D and Stereo Audio Sub-System (Texas Instruments)
  • LM4900 - Audio Power Amplifier (Texas Instruments)
  • LM4901 - 1.6 Watt Audio Power Amplifier (Texas Instruments)
Other Datasheets by National Semiconductor
  • LM494 - Pulse Width Modulated Controller
  • LM4940 - 6W Stereo Audio Power Amplifier
  • LM4940 - 6W Stereo Audio Power Amplifier
  • LM4941 - 1.25 Watt Fully Differential Audio Power Amplifier
  • LM4946 - Output Capacitor Less Audio Subsystem
  • LM4947 - Mono Class D and Stereo Audio Subsystem
  • LM4900 - 265mW at 3.3V Supply Audio Power Amplifier
  • LM4901 - 1.6 Watt Audio Power Amplifier

Full PDF Text Transcription

Click to expand full text
www.DataSheet4U.com LM4949 Stereo Class D Audio Subsystem with OCL Headphone Amplifier September 2006 LM4949 Stereo Class D Audio Subsystem with OCL Headphone Amplifier General Description The LM4949 is a fully integrated audio subsystem designed for stereo cell phone applications. The LM4949 combines a 2.5W stereo Class D amplifier plus a separate 190mW stereo headphone amplifier, volume control, and input mixer into a single device. The filterless class D amplifiers deliver 1.19W/channel into an 8Ω load with < 1% THD+N from a 5V supply. The headphone amplifier features National’s Output Capacitor-less (OCL) architecture that eliminates the output coupling capacitors required by traditional headphone amplifiers.
Published: |