Riding Out Automotive Transients : Architecting Front End Power Conversion Stage for Automotive Off-Battery Loads
With rapidly expanding electronic content in latest generation of cars, there is an ever increasing need for power conversion from the car battery rail. The 12-V battery rail is subject to a variety of transients. This presents a unique challenge in terms of the power architecture for off-battery systems. This presentation introduces the different types of transients that occur in automotive battery rails, the causes of those transients, and the standards and specifications defining the test conditions for those transients.
The presentation demonstrates the different power architectures for power conversion and protection circuits to ride out the transients and minimize the interruption to the loads. It compares the advantages and trade-offs associated with buck-boost, boost, and pre-boost approaches for surviving cold-cranks and load dump. The different approaches for reverse battery protection are presented and the advantages of smart diode compared to alternate methods.
What you will learn: This presentation equips the designer with a deeper understanding of automotive transients and the approaches to tackle these transients while architecting the power conversion stage.