MCT8314Z

The MCT8314Z provides a single-chip, code-free sensored trapezoidal commutation device for customers driving 12- to 24-V brushless-DC motors. The MCT8314Z integrates three 1/2-H bridges with 40-V absolute maximum capability and a low RDS(ON) of 575-mΩ (high-side and low-side combined) to enable high power drive capability. The integrated current limiting feature limits motor currents during start-up or high load conditions while eliminating the need for external sense resistors. An integrated 5-V LDO generates the necessary voltage rail for the device and can power external circuits.

MCT8314Z implements sensored trapezoidal control in a fixed-function state machine, so an external microcontroller is not required to spin the brushless DC motor. The MCT8314Z device integrates three analog Hall comparators for position sensing to achieve sensored trapezoidal BLDC motor control. The control scheme is highly configurable through hardware pins or registers settings ranging from motor current limiting behavior to fault response. The speed can be controlled through a PWM input.

There are a large number of protection features integrated into the MCT8314Z that are designed to protect the device, motor, and system against fault events.

Refer Application Information for design consideration and recommendation on device usage.