Audio Boom Box/Portable Speaker Reference Design with Efficient Boost Converter.

(ACTIVE) PMP9491

Description & Features

Technical Documents

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Description

PMP9491 is a 30W highly efficient and compact Portable Speaker/Audio Boom Box reference Design which can be used in 15W +15W Stereo or 30W Woofer Applications. The Power Source for the Design is 1 or 2 Li ion in Series . The design is broadly divided into three main stages:

  1. Highly efficient Single-Phase Non Synchronous Boost Converter using the LM3481 controller IC.  The design accepts an input voltage of 3.3Vin to 9Vin and provides an output of 12 V capable of supplying 2.5A of continuous current to the load.  The peak efficency acheived is 95 percent .
  2. 15W+15W Stereo Audio Amplifier with TPA3118D2 Class D device.
  3. Very Low Cost Stereo Inputs to Woofer Bass Input Conversion.
  4. Battery Charger bq24133 , 2.5A Synchronous Switch-Mode Li-Ion/Li-Polymer Stand-Alone Battery Charger with Integrated MOSFETs and Power Path Selector.

Features
  • Low Cost Non Synchronous Boost for Audio Boom Box application.
  • Ultra Low Footprint Area for LM3481 Actual Power Stage
  • Single Speaker (Woofer), Dual Speaker(Stereo) Support in the design
  • Low Vin Support for Single as well as Dual Li ion Battery support
  • 100-kHz to 1-MHz Adjustable / Synchronizable Clock Frequency and limits the inrush current at start-up.
  • Battery Charger with Dynamic Power Path management


 


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Schematic/Block Diagram

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Design Files

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Bill of Materials (BOM)

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TI Devices (10)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ24133  Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger  Battery management  Sample & Buy View Design Kits & Evaluation Modules
CSD16321Q5  N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
CSD17313Q2  30V N Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
CSD25310Q2  20-V P-Channel NexFET Power MOSFET, CSD25310Q2  MOSFETs  Sample & Buy Not Available
LM324  Quadruple Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
LM324-MIL  Quadruple Operational Amplifier  Analog and Mixed-Signal  Not Available Not Available
LM3481  2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPA3116D2  50-W Stereo (BTL) Class-D Audio Amp w/ SpeakerGuard™  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPA3118D2  30W, 2 Ch, 4.5-26V supply, Stereo Class D amplifier with Multiple Switching Frequencies  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPA3130D2  15W Filter-Free Class D Stereo Amplifier with AM Avoidance  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ24133 Download -
CSD16321Q5 Download Download
CSD17313Q2 WSON (DQK)| 6 Download -
CSD25310Q2 WSON (DQK)| 6 Download
LM324 Download Download
Download Download
Download Download
Download Download
LM3481 Download Download
TPA3116D2 Download
TPA3118D2 Download Download
TPA3130D2 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 4694 26 Feb 2015 6
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 322 26 Feb 2015 8
PDF 24 26 Feb 2015 4
PDF 148 26 Feb 2015 17

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