ROHM Announces Automotive Comparator with High EMI Withstand
Published2019.10.11 07:01As electronification and high-density integration are promoted in electric vehicle systems, the noise environment is deteriorating.
ROHM announced on the 10th that it has developed the 'BA8290xYxxx-C series' ground sense comparator for automotive systems.
The BA8290xYxxx-C series, consisting of BA82903YF-C, BA82903YFVM-C, BA82901YF-C, and BA82901YFV-C, is a comparator used for threshold determination, such as sensor output signals.
The BA8290xYxxx-C series [tests] output voltage fluctuation ± across all noise frequency bands in the noise evaluation test of the international standard ISO11452-2.Achieved an EMI resistance of less than 1%.
In the case of general products, the influence of noise may cause output voltage fluctuations of more than ±20%, potentially leading to malfunctions such as High/Low inversion.
The BA8290xYxxx-C series is unaffected by noise, which reduces the burden of noise design that previously used various filters as noise countermeasures, thereby enabling reduced system design effort and high reliability.
It can be used in all electronic systems equipped with electronic circuits where noise is a concern, such as EV/HEV inverters, ECUs, automatic transmissions, electric power steering, vehicle lamps, combination switches, EV chargers, navigation systems, and air conditioners.
Sample shipments of the new series began in February 2019 at 500 yen per unit, and mass production is scheduled to begin in October 2019 with a production capacity of 1 million units per month.
"We plan to apply high noise immunity technology to power ICs and the like in the future," said a ROHM official. "We plan to contribute to the high-level concise design and high reliability of automotive systems."
Meanwhile, ROHM offers the BA8290xYxxx-C series as the 'EMARMOUR' series, along with the high EMI-withstanding OP Amp series developed in 2017.
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▲ ROHM EM Armor Series Lineup (Table = ROHM)
With a standard comparator terminal layout and a lineup available in various surface-mount packages and channel counts, it can be used to replace existing products that are prone to noise.
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