Power Conversion Techniques for Complying with Automotive Emissions Requirements: EMI Sources and CISPR 25 limits
eFuses are highly integrated ICs that offer device and system-level protection at the input or the output. Traditionally, complete power path protection circuitry was accomplished with a handful of discrete components – components that can use up to 70% greater board space, introduce unnecessary design hurdles, and potentially slow your time to market if UL recognition is required. Those problems are eliminated with our fully integrated eFuses that include over current, over voltage, reverse polarity and more essential protection functions.
Enterprise data centers. Programmable logic controllers for fully-automated factories. Surround-view systems in your vehicle. What do these applications have common? If a fault impacts the power rails, the impact could be disastrous. Browse our video content or fully tested reference designs to see how our protection devices are solving real-world problems for these spaces.
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Browse through our beginner resources below if you’re brand new to eFuses or need a refresher on common eFuse functions.
This video presents a short overview of automotive frond-end and the transients tackled by the frond-end power conversion stage connected to an automotive battery rail.
This section presents a high level overview of automotive board net and the describes the conditions that the the tests simulate. These include:
- Reverse polarity
- Jump start
- Load sump
- Starting profile
- Superimposed ac
This section presents an approach to architecting the dc-dc conversion stage to handle the transients on automotive battery rail. Following topologies are covered:
- Always-on boost + buck
- On-demand boost + buck
- Buck + post boost
Pro/cons of the different approaches are also discussed.
This section presents the different methods of protecting the electronic loads connected to the automotive battery rail in the event of accidental reverse battery connection. The methods covered include:
- Schottky diode
- PFET + discretes
- Smart diode + NFET
This section presents the buck-boost dc-dc converter as an effective and efficient solution for the wide vin automotive battery rail. The advantages compared to pre-boost and two stage solutions are presented. Also contains an overview of buck-boost converter and controller offerings convering various current and power levels.