Highly Efficient and Compact 100W Automotive Amplifier Reference Design with Boost Converter PMP9484 (ACTIVE)

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Description

PMP9484 is a 100W highly efficient and compact automotive amplifier reference design which can be used in 50W +50W stereo or 100W woofer applications.  The design is broadly divided into three main stages:
1.) Highly efficient single-phase synchronous boost converter using the LM5122 controller IC.  The design accepts an input voltage of 7.5Vin to 20Vin (12Vin nominal) and provides an output of 24V capable of supplying 5A of continuous current to the load.  The peak efficiency acheived is 98 percent.
2.) 50W+ 50W stereo audio amplifier with TPA3116D2 Class D device
3.) Very low cost stereo input to woofer bass input conversion

Features
  • Synchronous rectification in boost for very high efficiency
  • Ultra-low footprint area for LM5122
  • Actual power stage combo with highly efficient class D amplifier
  • Single speaker (woofer), dual speaker (stereo) support in the design
  • Low Vin support for automotive application

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Design Files

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Parametrics
 PMP9484.1
(Output Voltage 1)
Vin (Min) (V)6.5
Vin (Max) (V)20
Vout (Nom) (V)24
Iout (Max) (A)5
Output Power (W)120
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBoost- Synchronous

TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18501Q5A  40V, N ch NexFET MOSFET™, single SON5x6, 3.2mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
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
LM5122  3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TAS5404-Q1  26-W Analog Single-Ended Input 4-Ch Class-D Amp w/Load Dump Protection and I2C Diagnostics  Audio amplifiers  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
TPA3116D2-Q1  2-Ch, 50-W Analog Input Class-D Audio Amplifier  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPA3118D2-Q1  2-Ch, 30-W Analog Input Class-D Audio Amplifier  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18501Q5A VSONP (DQJ)| 8 Download Download
LM324 Download Download
Download Download
Download Download
Download Download
LM5122 Download Download
Download -
TAS5404-Q1 Download
TPA3116D2 Download
TPA3116D2-Q1 Download Download
TPA3118D2-Q1 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3804 29 Sep 2014
Design files (3)
Title Type Size (KB) Date
ZIP 375 29 Sep 2014
PDF 32 29 Sep 2014
PDF 698 29 Sep 2014

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