WINDING Q R 220 nF OUT 2 S L6203 SENSE Q GND R S OSC L6506 Vref B SENSE Vref A RESISTORS PBL3717, TEA3717, TEA3718 and L6219 Devices like the PBL3717, TEA3717 TEA3718 and L6219 can also be used to implement microstepping. The main limitationinthesedevices is that, dueto their internalconnections,theycanonlyimplement
frequency modulation like imple- odes should have switching characteristics that mented in the PBL3717A, TEA3717, TEA3718, are the same or better than the switching time of and L6219is more useful. the output transistors. Usually diodes that have a reverserecovery time of less than 150 ns are suf- ficient
