Automotive-protection devices offer ideal-diode characteristics

摘要

The MAX16914 and MAX16915 overvoltage-protection controllers target use in automotive and industrial systems that must withstand high-voltage and transient characteristics. The devices sense the input and output voltages of two back-to-back P-channelrnMOSFETs to provide overvoltage protection with ideal-diode characteristics. When forward-biased, the two PFETs have a voltage drop that is lower than that of a traditional blocking diode. During reverse-battery fault conditions, the two PFETs turn off to prevent reverse current flow. The units operate from 30 mA of quiescent current. The overvoltage threshold is resistor-adjustable and uses an indicator flag to alert the system to an overvoltage event. Prices for the MAX16914 and MAX16915 start at $1.60(1000).