LM4947TLEVAL

Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and TI 3D

LM4947TLEVAL

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Overview

The LM4947 is an integrated stereo subsystem with a filterless monoClass D speaker amplifier and selectable output low noise headphone amplifier in a 25-bump micro SMD package. The LM4947 also features RF suppression circuitry and TI 3D enhancement. The LM4947 is designed to meet the demands of mobile phones and other portable communication devices. It is capable of delivering 1.19W of average power into an 8 ohm load and 87 milliwatts of average power to a32 ohm load with less than 1% distortion (THD+N) from a 5V DC power supply.

The LM4947TLEVAL is an evaluation board designed to ease evaluation and effort during the development of a circuit using the LM4947TL. The evaluation board comes with an I2C card and cable. It is an easy-to-use stand-alone board that requires power and GND, an I2C control signal, aninput signal and anoutput load. Software for the product can be downloaded from TI's website.

Features
  • Tiny micro SMD
  • Very low iddq (12all outputs on at 5V)
  • High output power (1.19W into 8ohms at 5V)
  • 79dB PSRR 217Hz for speaker output
  • 86dB PSRR 217Hz for headphone outputs
  • 0.04% THD+N at 500mW for speaker output
  • 0.01% THD+N at 30mW for OCL headphone outputs

Applications

  • Mobile phones
  • Portable devices, such as PMPs, GPS

 

Speaker amps
LM4947 2.2-W, mono, analog input Class-D amp with 87-mW headphone amp & 3D enhancement
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Evaluation board

LM4947TLEVAL — Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and TI 3D

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GUI for evaluation module (EVM)

SNAC026 — LM4947 Control Software

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SNAC026 LM4947 Control Software

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Latest version
Version: 01.00.00.00
Release date: 21 Feb 2012
download LM4947 Control Software (zip)  — 1575 K

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Products
Speaker amps
LM4947 2.2-W, mono, analog input Class-D amp with 87-mW headphone amp & 3D enhancement
Hardware development
Evaluation board
LM4947TLEVAL Mono Class D and Stereo Audio Subsystem with OCL Headphone Amplifier and TI 3D

Release Infomation

The design resource accessed as www.ti.com/lit/zip/snac026 or www.ti.com/lit/xx/snac026/snac026.zip has been migrated to a new user experience at www.ti.com/tool/download/SNAC026. Please update any bookmarks accordingly.
TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
* Data sheet LM4947 Mono Class D & Stereo Audio Sub-Sys w/OCL Hp Amp & TI 3D datasheet (Rev. D) 01 May 2013
Certificate LM4947TLEVAL EU Declaration of Conformity (DoC) 02 Jan 2019

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