Leakage detection IC delivers benefits for backup power supplies in EVs and HEVs

July 02, 2013 // By Paul Buckley
ROHM has developed an automotive-grade leakage detection IC designed specifically for AC inverters and chargers for AC outlets in electric and hybrid vehicles.

The BD9582F-M features a wide operating temperature range and is AEC-Q100-certified, ensuring stable, reliable operation in automotive systems. In addition, industry-low current consumption (330uA) contributes to longer battery life.

In the wake of the Great East Japan Earthquake a growing number of hybrid and electric cars are being equipped with emergency or backup power systems, which include outlets that can power not only portable devices such as smartphones, but high power consumption consumer equipment as well. Safety systems similar to earth leakage circuit breakers that incorporate leakage detection ICs used in homes and buildings are currently being considered for cars in order to prevent electric shock or fires when using AC outlets. However, severe challenges regarding reliability (including temperature protection) must be overcome before full implementation is possible.

In response, ROHM developed a new leakage detection IC designed to provide safe, reliable operation of AC outlets in vehicles. The BD9582F-M expands the temperature range from the conventional -20°C to 95°C to a more robust -40°C to 105°C and protects against electromagnetic radiation, providing the necessary level of reliability for automotive applications.

ROHM’s leakage detection IC also complies with semiconductor standard AEC-Q100 for automotive applications and utilizes proprietary technology combined with a novel circuit design for improved cutoff (interrupt) performance and greater system safety. In addition, further circuit optimization results in the industry’s lowest current consumption of 330 uA, prolonging battery life while maintaining high reliability operation. Also, this IC is compatible with AC100~240 V, ensuring support not only for automotive systems but consumer devices as well.

Visit ROHM Semiconductor Europe at www.rohm.com/eu