The Industry's First* Leakage Detection IC for Automotive Applications
Suitable for backup power supplies in EVs and HEVs that contribute to greater system safety delivery

※ROHM May 8 Survey

ROHM has recently announced the development of 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.

leakage detection IC 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 330uA, prolonging battery life while maintaining high reliability operation. Also, this IC is compatible with AC100~240V, ensuring support not only for automotive systems but consumer devices as well.

Availability: Samples (Now), OEM Quantities (June 2013)

Key Features
1. The industry's lowest current consumption
With cars, particularly electric vehicles, power is limited to the amount of battery charge remaining. And earth leakage circuit breakers for homes normally operate 24 hours a day year-round. Therefore, it is imperative that any safety systems implemented in vehicles minimize current consumption as much as possible. The industry's lowest current consumption
2.Application Circuit Examples
Application Circuit Examples
3. Product Lineup (Including Consumer-Grade Models)
Package Part No. Operating
Voltage (V)
Current (μA)
Trip Voltage*1
Method (Wave)
 -40~105 12~22 330 7.5 0.5 Yes Yes
SOP8 BD9582F -20~95 12~22 330 7.5 0.5 Yes -
SIP8  BD9582N  -20~95 12~22 330 7.5 0.5 Yes -
SOP8 BD9584F -20~95 8~22 250 9.2 1.0 Yes -
  *1: The voltage at which the IC determines a leakage detection event has occurred
*2:A quality standard that defines stress testing for automotive certification of ICs