Small automotive front-end 16-W power reference design
PMP30548
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Key Document

Description

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

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP30548.1
(Output Voltage 1)
PMP30548.2
(Output Voltage 2)
PMP30548.3
(Output Voltage 3)
Vin (Min) (V)3.28.58.5
Vin (Max) (V)404040
Vout (Nom) (V)8.553.3
Iout (Max) (A)2.31.62.3
Output Power (W)19.5587.59
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDC
TopologyBoost- Non SyncBuck- SynchronousBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5150-Q1  Wide VIN Automotive Low IQ Boost Controller  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
LM53625-Q1  2.5/3.5A, 36 V Synchronous, 2.1MHz, Automotive Step Down DC-DC Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5150-Q1 Download
LM53625-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1522 25 Jan 2019
Design files (6)
Title Type Size (KB) Date
ZIP 410 25 Jan 2019
ZIP 214 25 Jan 2019
PDF 885 25 Jan 2019
PDF 58 25 Jan 2019
PDF 56 25 Jan 2019
PDF 189 25 Jan 2019

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