Hi Rick,
For a new project we are starting for a customer of us we are also thinking of a combination of a PCA9629 and a DRV8833 as suggested here.
For this new project we have to control a maximum of 14x 2-phase bipolar stepper motors with a rated current of 0.7A and a coil resistance of 6.6 Ohm I guess this should be possible with a DRV8833 ? These drivers will be integrated on 1 PCB and controlled by an on-board mini PC module.
However we have to control 1 bigger 2 phase bipolar stepper motor (for each PCB 1 driver) with a rated currrent of 5.5A and 0.28 Ohm coil resistance so we need a high power driver for this. Or a combination of a MOSFET gate driver and external MOSFETs that can be controlled by the PCA9629. Do you have a suggestion for this? We want to use the NXP device for the I2C interface and possibilties to connect home sensors and other peripherals with this device by the GPIO pins.
Regards
Chris van der Aar
Sr Design Engineer
NTS Systems Development
Eindhoven, The Netherlands