Automotive Off-battery Dual-phase Boost Converter Reference Design
TIDA-01534
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Key Document

Description

This reference design is a high power, wide input voltage range circuit that uses synchronous boost controllers in a dual-phase configuration outputting four (4) switchable 12-V rails that each can supply up to 2.5 A with diagnostic features; plus a dual synchronous buck that generates two high current, lower voltage rails.

Features
  • Wide input voltage range of 9V to 20V, support transient down to 6V and up to 36V
  • Dual-phase high current synchronous boost controllers configuration with > 98% efficiency under typical operating conditions
  • Dual high-current synchronous outputs: 5V, 3A nominal; 3.8V, 6.5A nominal
  • Reverse battery protection with zero IQ smart diode controller
  • Minimized AM radio band interference

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM25122-Q1  Automotive Grade, 3-42V Wide Vin, Synchronous Boost Controller with Multiphase Capability  Step-up (boost)  Sample & Buy Not Available
LM5140-Q1  Wide Vin Dual 2.2MHz low Iq Synchronous Buck Controller  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM74700-Q1  Low Iq, ideal diode controller  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS1H100-Q1  40-V, 100-mOhm 1-Ch Smart High Side Switch  Power switches  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM25122-Q1 Download
LM5140-Q1 Download Download
LM74700-Q1 Download -
TPS1H100-Q1 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 9987 09 Nov 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1748 22 Dec 2017
ZIP 1704 22 Dec 2017
PDF 2276 22 Dec 2017
PDF 421 22 Dec 2017
PDF 65 22 Dec 2017
PDF 461 22 Dec 2017

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