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STSPIN830 bảng dữ liệu(PDF) 13 Page - STMicroelectronics

tên linh kiện STSPIN830
Giải thích chi tiết về linh kiện  Compact and versatile three-phase and three-sense motor driver
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STSPIN830 bảng dữ liệu(HTML) 13 Page - STMicroelectronics

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Figure 7. Overcurrent and short-circuit protections management
FAULT_MCU
MCU
EN_MCU
V
EN
Power
stage
FAULT
VIH
V
VIL
Overcurrent
protection
ENABLED
DISABLED
ENABLED
CEN
REN
t
tDIS
t
t
V
EN\FAULT
DEVICE
RELEASE
EN
OC\SC
THSD
FAULT
AM040384
RELEASE
RELEASE
charge
OCSD
discharge
The total disable time after an overcurrent event is set sizing properly the external network connected to EN
\FAULT pin (refer to Figure 8. Disable time versus REN and CEN values (VDD = 3.3 V) ) and it is the sum of the
discharging and charging time of the CEN capacitor:
Equation 2
(2)
tDIS = tdischarge + tcharge
Considering tdischarge is normally significantly lower than tcharge, its contribution is negligible and the disable time
is almost equal to tcharge only:
Equation 3
(3)
tDIS≅REN×CEN×ln VDD−REN×IPD −VRELEASE
VDD−REN×IPD −VIH
Where VDD is the pull-up voltage of REN resistor.
The recommended value for REN and CEN are respectively 39 kΩ and 10 nF that allow obtaining 200 µs
disable time.
STSPIN830
Device protections
DS12584 - Rev 2
page 13/27



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