A6727 Single-Phase Automotive PWM Controller STMicroelectronics A6727 Single-Phase Automotive PWM Controller is an AEC-Q100 compliant step-down controller with integrated high-current drivers. The A6727 offers complete control logic, protection, and reference voltage for general DC-DC converter applications. Designed to drive N-channel MOSFETs in a synchronous buck topology, this highly-integrated device allows a reduction of cost and size of the power supply solution.