Power Reference Design for 450W Automotive Audio Amplifier


Design files


The PMP7837 is a 4-phase synchronous boost converter that can take a 6-17V input and put out 24V at 450W. It is used for powering up to eight 50W automotive trunk amplifiers. The 4-phase synchronous design with 450kHz switching frequency per phase results in a compact and efficient circuit well suited for such applications.

  • Mininum 6V input voltage supports US automotive cold cranking requirement
  • 96% peak efficiency at 12V input
  • 1.8MHz effective switching frequency
  • Ripple cancellation as a result of 4-phase design
  • Synchronous operation saves power and eases thermal design.
Output voltage options PMP7837.1
Vin (Min) (V) 6
Vin (Max) (V) 17
Vout (Nom) (V) 24
Iout (Max) (A) 15
Output Power (W) 360
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Multiphase
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

SNVU254.PDF (605 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

SNVR241B.PDF (392 K)

Detailed schematic diagram for design layout and components

SNVR242A.PDF (28 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC287.ZIP (1087 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

Boost controllers (external switch)

LM51223-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability

Data sheet: PDF | HTML
Boost controllers (external switch)

LM5122-Q1Automotive, 3-V to 65-V wide VIN, current mode synchronous boost controller with multiphase

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18501Q5A40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 3.2 mOhm

Data sheet: PDF | HTML

Technical documentation

= Top documentation selected by TI
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Type Title Date
* Test report PMP7837 Test Results Apr. 14, 2013
Technical article Power Tips: Power Supplies for Car Audio Mar. 28, 2014

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