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STSPIN32F0252 数据表(PDF) 19 Page - STMicroelectronics

部件名 STSPIN32F0252
功能描述  Advanced 250 V three-phase BLDC controller with embedded STM32 MCU
PDF  32 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STSPIN32F0252 数据表(HTML) 19 Page - STMicroelectronics

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Equation 1
(1)
t1≅RON_OD ∙COD∙ln VODVSSDl  
Equation 2
(2)
t2COD∙ VSSDh
IOD ∙ln VSSDl−VOD
VSSDh−VOD
Where VOD = VFLOAT_OD In case the OD pin is connected to VCC by an external pull-up resistor ROD_ext, the
OD discharge time is determined by the external network ROD_ext COD and by the internal MOSFET's RON_OD
(Equation 3), while the Restart time is determined by current in ROD_ext (Equation 4)
Equation 3
(3)
 t1≅COD∙ ROD_ext//RON_OD  ∙ln VOD−Von
VSSDl−Von
Equation 4
(4)
t2≅COD∙ ROD_ext ∙ln VSSDl−VOD
VSSDh−VOD  
where
Von= RON_OD 
ROD_ext+RON_OD ∙Vcc ; VOD=Vcc
Figure 10. Smart shutdown timing waveforms
SMART SHUTDOWN CIRCUIT
LVG/HVG
OD gate
(internal)
CIN
Fast shut down
the driver outputs are switched off
disable time
OD
FAULT
VREF
tFCIN
tFCIN
tCINoff
VSSDh
VSSDl
VOD
t1
t2
OD
COD
SMART
SD
LOGIC
RON_OD
IOD
5 V
VCC
OD
COD
SMART
SD
LOGIC
RON_OD
IOD
5 V
ROD_ext
external pull-up
2
1
immediately after the comparator triggering
STSPIN32F0251, STSPIN32F0252
Gate driver
DS13048 - Rev 4
page 19/32



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