Other Parts Discussed in Thread: DRV8421, TMS320F28P550SJ
Tool/software:
- We want to connect SW1 to DRV8421 to driver a 12V, 0.4A stepper motor, will a 10uH output inductor be a proper choice? To confirm the compensation configuration settings, if Rload is about 30 ohms, Fsw = 500 kHz, Vout = 12 V, is it feasible to choose Rs = 200 kohm, Cc = 7.5 nF, Croll = 1.5 pF? Moreover, if we want to left VFB1 as default (0.8V), is a 46.4k ohm resistor for RFB1 and a 3.3k ohm for RFB2 resistor available?
- As the SW2 will connect to TMS320F28P550SJ to power it on, is the 500us soft start time okay for SW2?
