Automotive transient and overcurrent protection filter reference design


Design files


This reference design showcases a protection system for voltage and current transient events typically found in automotive systems. This reference design optimizes functionality, size and protection capabilities while not sacrificing power delivery for premium audio amplifiers.

  • Ideal diode controller with external back-to-back N-channel MOSFETs for overvoltage protection and to emulate an ideal diode rectifier
  • Over-current protection along with analog current monitoring
  • Easily scalable solution for varying load sizes
??image.gallery.download_en_US?? View video with transcript Video

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.

TIDUEX5.PDF (4723 K)

Reference design overview and verified performance test data

TIDM718.PDF (229 K)

Detailed schematic diagram for design layout and components

TIDM719.PDF (97 K)

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

TIDM720.PDF (211 K)

Detailed overview of design layout for component placement

TIDM722.ZIP (2084 K)

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


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

TIDM721.PDF (874 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Ideal diode/ORing controllers

LM7481-Q1Automotive ideal diode controller with active rectification driving B2B NFETs

Data sheet: PDF | HTML
Analog current-sense amplifiers

INA302-Q1AEC-Q100, 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amp w/ dual comparators

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

TPS7B69-Q1Automotive 150-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator

Data sheet: PDF | HTML

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Design guide Automotive Transient and Overcurrent Protection Filter Reference Design PDF | HTML Oct. 12, 2020

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​