Texas Instruments' LM74670-Q1 is a controller device that can be used with an N-channel MOSFET in full- or half-bridge rectifier architectures for alternators. It is designed to drive an external MOSFET to emulate an ideal diode. A unique advantage of this scheme is that it is not ground referenced, thus it has zero I_Q. The Schottky diodes in full- or half-bridge rectifiers and alternators can be replaced with the LM74670-Q1 solution to avoid forward conduction diode losses and produce more efficient AC-DC converters.

The LM74670-Q1 controller provides a gate drive for an external N-channel MOSFET and a fast response internal comparator to pull-down the MOSFET gate in the event of reverse polarity. This device can support an AC signal frequency up to 300 Hz.