Highly Efficient and Compact 100-W Automotive Amplifier Reference Design with Boost Converter
PMP9484
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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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Schematic/Block Diagram
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Test Data
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TI Devices (7)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| CSD18501Q5A |
40V, N ch NexFET MOSFET™, single SON5x6, 3.2mOhm |
MOSFETs |
Sample & Buy |
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| LM324A |
Quadruple improved offset operational amplifier |
Operational amplifiers (op amps) |
Sample & Buy |
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| LM5122 |
3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability |
Step-up (boost) regulators |
Sample & Buy |
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| TAS5404-Q1 |
Automotive, 26-W, 4-ch, 6- to 18-V analog SE input Class-D audio amplifier w/ I2C diag & load dump |
Audio amplifiers |
Sample & Buy |
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| TPA3116D2 |
50-W stereo, 100-W mono, 4.5- to 26-V supply, analog input Class-D audio amplifier w/ SpeakerGuard™ |
Audio amplifiers |
Sample & Buy |
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| TPA3116D2-Q1 |
Automotive, 50-W, 2-ch, 4.5- to 26-V supply analog input Class-D audio amplifier |
Audio amplifiers |
Sample & Buy |
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| TPA3118D2-Q1 |
Automotive, 30-W, 2-ch, 4.5- to 26-V supply analog input Class-D audio amplifier |
Audio amplifiers |
Sample & Buy |
View Design Kits & Evaluation Modules |
CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 3804 |
29 Sep 2014
|
Design files (3)
| | ZIP | 375 |
29 Sep 2014
|
| | PDF | 32 |
29 Sep 2014
|
| | PDF | 698 |
29 Sep 2014
|
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