Micronas announced the first ISO 26262 compliant, low-power Hall switch family HAL 15xy in SOT23 JEDEC package. Micronas has supplied to the automotive market with more than 1.5 billion HALL switches for a very wide variety of applications.
“ISO 26262 is currently changing the vehicle development in a way, which no-one dared to imagine ten years ago when functional safety was coming more and more to the fore in the automotive industry”, says Dirk Behrens, Vice President Automotive at Micronas. “Our first generation of ASIL-ready Hall switches is one-of-a-kind on the market and meets the trend for enhanced safety requirements and increasing low-power demands. This success is another step towards our vision to become the most preferred partner for sensing and control.”
Micronas explains "To enable most efficient failure localization and elimination, the HAL 15xy family provides a single-point fault metric (SPFM) of more than 60% which exceeds even the standard requirements of an ASIL A classification. The sensor monitors for example internal voltage, current and bias levels which derive from the band gap reference and compares them with predefined reference values in order to supervise the operating conditions of the Hall plate and its signal chain. Besides these monitoring functions, which were considered for the SPFM calculation, the HAL 15xy family features an optional and unique power-on self-test allowing the system to test the full signal path inside the sensor before the ordinary operation starts. In contrary to competitive solutions, this special self-test can be enabled without the need for an additional pin within the standard SOT23 3-pin package while the current consumption of only 1.6 mA of the devices is not influenced. To complete the sensors' safety package, the HAL 15xy switches are able to report incorrect operations via an integrated fail safe state directly to the control unit."
Start of production is planned for 2015.