Stepper motor driver IC provides multiple monitoring and protection functions
The MP6602 from Monolithic Power Systems provides a small and integrated solution for bipolar or unipolar microstepping motors which draw up to 4A per phase.
The Monolithic Power Systems MP6602 is a highly integrated solution for stepper motor driving which is supplied in a 4mm x 5mm 25-lead QFN package.
Featuring two internal full-bridge drivers, a built-in indexer/translator, and internal current regulation, the MP6602 requires no external current-sense resistors. Operating over a 4.5V to 35V input-voltage range, the MP6602 can supply an output current to the motor of up to 4A per phase, depending on the ambient temperature and board layout. The MP6602 can operate a stepper motor in full, half-, quarter-, eighth-, 1/16-, or 1/32-step modes.
An automatic hold-current mode can lower the winding current to automatically save power when full current is not required, such as when the motor is stopped or lightly loaded.
Diagnostic capabilities enabled by the MP6602 include:
- Rotor stall detection
- Back EMF measurement
- Thermal warning and shutdown
- Fault indication output
A serial control interface enables the developer to set control functions such as the step mode, direction, and output current. The serial interface can also read diagnostic registers.