STSPIN820 datasheet(19/29 Pages) STMICROELECTRONICS

No de pièce	STSPIN820

Description	Advanced 256 microsteps integrated motor driver with step-clock and direction interface

PDF	29 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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19 / 29 page

DocID031065 Rev 2

19/29

STSPIN820

Functional description

5.4

Overcurrent and short-circuit protections

The device embeds circuitry protecting each power output against the overload and short-

circuit conditions (short-circuit to ground, short-circuit to VS and short-circuit between

outputs).

When the overcurrent or the short-circuit protection is triggered the power stage is disabled

and the EN\FAULT input is forced low through the integrated open-drain MOSFET

discharging the external CEN capacitor (refer to Figure 8).

The power stage is kept disabled and the open-drain MOSFET is kept ON until the

EN\FAULT input falls below the VRELEASE threshold, then the CEN capacitor is charged

through the external REN resistor.

Figure 8. Overcurrent and short-circuit protections management

The total disable time after an overcurrent event can be set sizing properly the external

network connected to the EN\FAULT pin (refer to Figure 9).

Equation 2

tDIS = tdischarge + tcharge

STSPIN820 Fiches technique(PDF) 19 Page - STMicroelectronics