Part Number: TIDA-00872 Other Parts Discussed in Thread: DRV8711 , , DRV8805 Tool/software: Code Composer Studio Don’t know if it’s my circuit problem? Or is it a software configuration problem? Please also help!
When DRV8711 is used in a unipolar…
Yes, but external circuitry is required. Please see www.ti.com/.../TIDA-00872 as an example.
The overcurrent feature must be disabled in this mode. The recirculation diodes and zeners may need to be resized depending on your application. …
The DRV8805 is rated at 2A.
There are a couple of options:
1) If possible, re-configure the stepper motor into bipolar. This allows more devices to choose from.
2) Look at www.ti.com/.../TIDA-00872 This shows how the DRV8711 can be configured…
Output current of 3A limits the options available. Please check if 2.5A will work.
What level of microstepping is desired? When using unipolar, what is the desired configuration to recirculate the current.
For unipolar, www.ti.com/.../TIDA…
I think you mean unipolar motor. We have DRV8803, DRV8805 can be used to drive unipolar motor. Also we have a reference design using DRV8711 for high current unipolar motor. www.ti.com/.../TIDA-00872
Hi Thomas, It may be possible to do so. It would require some additional circuitry between the DRV8701 and LM5109B to workaround overcurrent and predriver faults, and to lower the voltage at the inputs of the LM5109B. In addition, dead time may have…