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STSPIN840 Datasheet(PDF) 19 Page - STMicroelectronics

Part # STSPIN840
Description  Compact dual brushed DC motor driver
PDF  28 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STSPIN840 Datasheet(HTML) 19 Page - STMicroelectronics

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DocID031835 Rev 1
19/28
STSPIN840
Detailed description
28
Considering tdischarge is normally significantly lower than tcharge, its contribution is negligible
and the disable time is almost equal to tcharge only:
Equation 3
Where VDD is the pull-up voltage of REN resistor.
The recommended value for REN and CEN are respectively 39 k and 10 nF that allow
obtaining 300 µs disable time.
Figure 10. Disable time versus REN and CEN values (VDD = 3.3 V)
tDIS REN CEN In
VDD REN I
PD
–
 V
RELEASE
–
VDD REN I
PD
–
 V
IH
–
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