Automotive 12-V to 24-V engine load interface reference design


Design files


This reference design is a 3-phase 1/2 H-Bridge Motor Drive solution with independent FET capability that interfaces with solenoid loads found in Gasoline and Diesel Engine Platforms such as automotive solenoids, bidirectional Brushed- or Brushless-DC motors, unidirectional Brushed-DC motors, and relays.

Internal Combustion Engines (ICE) will be the largest market for Engine Control Units (ECUs) until the emergence of Hybrid Electric Vehicles, and engine platforms can require up to as many as 60 general purpose outputs. The DRV8343-Q1 motor driver is featured on this design and supports up to 6 independent loads per device, with configurability for any architecture of load output configurations.

This reference design features 4 distinct outputs to showcase the versatility of the DRV8343-Q1: solenoid with push-pull configuration, solenoid with high-side/low-side gate drivers, and independent high-side / low-side loads. These loads are independently driven using an automotive TMS320F28035 C2000 high-efficiency 32-bit microcontroller.

  • Supports 12-V or 24-V automotive systems
  • Operating range 5.5-V to 40-V continuous, up to 60-V transient capability
  • 20-A peak current load driving capability
  • Controls up to 6 engine loads independently in four different load configurations
  • AEC-Q100, Grade 1 qualified
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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.

TIDUEW6.PDF (8516 K)

Reference design overview and verified performance test data

TIDM542.PDF (414 K)

Detailed schematic diagram for design layout and components

TIDM543.PDF (99 K)

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

TIDM544.PDF (340 K)

Detailed overview of design layout for component placement

TIDM546.ZIP (5102 K)

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


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

TIDM545.PDF (1523 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

BLDC drivers

DRV8343-Q1Automotive 12-V to 24-V battery 3-phase smart gate driver with current shunt amplifiers

Data sheet: PDF | HTML
Buck converters (integrated switch)

LMR36006-Q14.2-V to 60-V, 0.6-A ultra-small synchronous step-down converter

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28035C2000™ 32-bit MCU with 60 MHz, 128 KB flash, CLA

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28035-Q1Automotive C2000™ 32-bit MCU with 60 MHz, 128 KB flash, CLA

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7B81-Q1Automotive 150-mA, off-battery (40-V), ultra-low-IQ, low-dropout voltage regulator with enable

Data sheet: PDF

Technical documentation

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* Design guide Automotive 12-V to 24-V Engine Load Interface Reference Design Apr. 07, 2020

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