PMP30548

Small automotive front-end 16-W power reference design

PMP30548

Design files

Overview

This reference design is an automotive front-end power supply able to provide 16 W for the 12-V car battery. The first stage is a pre-boost LM5150-Q1 to maintain a stable, mid-rail voltage of 8.5 V during cold-crank operation. Two downstream buck converters are able to handle jump start requirements of up to 40 V. Additionally, an LC filter is built in to improve EMI behavior.

Features
  • Small & thin solution of 44 mm x 32 mm
  • Designed to handle cold cranking operation of 3.2 V
  • Wide-Vin buck supply to handle jump start operation of 40 V
  • An EMI friendly solution
  • Output power contains 5 V at 1.6 A rail and 3.3 V at 2.3 A
  • No usage of electrolytic capacitors
Output voltage options PMP30548.1 PMP30548.2 PMP30548.3
Vin (Min) (V) 3.2 8.5 8.5
Vin (Max) (V) 40 40 40
Vout (Nom) (V) 8.5 5 3.3
Iout (Max) (A) 2.3 1.6 2.3
Output Power (W) 19.55 8 7.59
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC
Topology Boost- Non Sync Buck- Synchronous Buck- Synchronous
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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.

TIDT080.PDF (1593 K)

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

TIDRYT0.PDF (189 K)

Detailed schematic diagram for design layout and components

TIDRYT1.PDF (56 K)

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

TIDRYT2.PDF (58 K)

Detailed overview of design layout for component placement

TIDRYT4.ZIP (214 K)

Files used for 3D models or 2D drawings of IC components

TIDCF93.ZIP (410 K)

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

TIDRYT3.PDF (885 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM5150-Q1Automotive 1.5-V to 42-V VIN, low IQ boost controller with 6.8V, 7.5V, 8.5V, 10.5V output options

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LM53625-Q12.5-A, 36-V synchronous, 2.1-MHz, automotive step-down DC-DC converter

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report Small automotive front-end 16-W power reference design Jan. 25, 2019

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