How your automotive display can meet ASIL-B, cold-crank specifications

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Learn how a TFT-LCD display backlight driver IC can meet ASIL-B functionality requirements and exceed cold-crank specifications while maintaining a smaller size and low EMI...

www.ednasia.com, Jul. 01, 2020 – 

New automobile models are increasingly equipped with multiple displays for different functions. These "infotainment" displays may include an instrument cluster, a central information display, mirror replacement displays, and multiple rear-seat entertainment displays. Because an instrument cluster display provides relevant safety information to the driver, its electronics must be robust enough to not only withstand a harsh automotive environment (cold/hot crank, load dump, start/stop) but also incorporate additional diagnostics required to meet Automotive Safety Integrity Level (ASIL) safety standards, have low electromagnetic interference (EMI) to reduce interference with multiple RF receivers in the vehicle, and be small enough to fit additional electronics within the same space.

This design solution reviews the main challenges of TFT-LCD backlight designs, with an emphasis on how they can meet ASIL safety standards. We also examine how they can operate without display flickering in the presence of low battery voltage (cold crank) while maintaining low EMI and a smaller size. It then introduces a TFT-LCD backlight driver IC that meets these criteria.

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