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STSPIN220 数据表(PDF) 16 Page - STMicroelectronics

部件名 STSPIN220
功能描述  Low voltage stepper motor driver
PDF  27 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STSPIN220 数据表(HTML) 16 Page - STMicroelectronics

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Figure 10. Overcurrent and short-circuit protection management
V
EN
Power
stage
FAULT
V
IH
V
RELEASE
V
IL
Overcurrent
protection
ENABLED
DISABLED
ENABLED
t
OCSD
t
DIS
t
discharge
t
charge
V
RELEASE
EN\FAULT
FAULT_MCU
MCU
DEVICE
EN_MCU
RELEASE
EN
OC\SC
THSD
FAULT
C
EN
I
PDEN
R
EN
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 10. Overcurrent and short-circuit protection management):
Equation 2
But tcharge is normally much higher than tdischarge, thus we can consider the following:
Equation 3
where VDD is the pull-up voltage of the REN resistor.
STSPIN220
Overcurrent and short-circuit protection
DS11633 - Rev 4
page 16/27



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