ROHM has created Hall ICs, the BD5310xG-CZ/BD5410xG-CZ series, developed for automotive applications needing magnetic detection.
In recent years, the continuing computerisation of vehicle systems to fulfil the need for increasing electrification and functionality along with greater comfort and safety has required additional ECUs and sensors to provide control.
Among these sensors, Hall ICs are becoming one of the most adopted types due to their ability to detect position and motor rotation in a non-contact manner that reduces the wear-and-tear prevalent with mechanical switches while also being compact and can be equipped with protection circuits.
The company has developed Hall ICs for automotive applications that improve reliability by combining Hall IC expertise cultivated over many years for the mobile and consumer sectors with original high withstand voltage processes. As a result, the series has an industry-leading 42V withstand voltage that permits direct connection to a primary (12V battery) power supply. This adds to enhanced reliability under battery power, which can fluctuate rapidly depending on the operating conditions. At the same time, a wide operating supply voltage range of 2.7V to 38V allows support for various applications. The unique internal topology also reduces power consumption by approx. 20% over general products to achieve an industry-leading current consumption of 1.9mA. Both series comply with the AEC-Q100 (Grade 1) automotive reliability standard while incorporating multiple protection circuits required for vehicle systems.
The BD5310xG-CZ series is a unipolar detection type, while the BD5410xG-CZ series supplies latch-type detection, permitting designers to choose the ideal product based on set necessities. Eleven models are offered in detection magnetic flux densities – ranging from 2.0mT to 28.0mT. Unipolar detection can detect position in applications such as door open/close and door locks, whereas latch detection is ideal for rotation detection in various motors used in windows, sliding doors, and the like.
Typical application examples for automotive systems include door locks, seat position, seat belts, wiper motors, power windows, sliding doors, etc.