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L9788 Datasheet(PDF) 252 Page - STMicroelectronics

Part # L9788
Description  Multifunction IC for automotive engine management system
PDF  264 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9788 Datasheet(HTML) 252 Page - STMicroelectronics

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Device behavior
L9788
252/264
DS12308 Rev 4
Figure 108. Overcurrent not permanent battery OVC not permanent after VB present with
WK_IN/WAKE_UP_EOT/CAN detection - no retry
Figure 109. Overcurrent in permanent battery restart conditions during KEY or WK_IN or
WK_UP_EOT/CAN detection
Note:
In permanent battery when power on by KEY the MSC CMD can only restart driver after
OVC. The MSC CMD OFF has no effect.
GADG1612160817PS
t
SCENARIO 31 - MRD - Overcurrent not permanent battery
VPRE
Power On Reset
VB_IN
Internal OVC flag
FAULT
MRD out
PHOLD
WAKE_UP_CAN_DET
WAKE_UP_EOT_DET
WK_IN_DET
KEY_IN_DET
on
UV_VB_IN
V
UV_VB_CP_OFF
V
I_LS_ovc_flt
off
OVC
OVC permanent after VB present with WK_IN / WAKE_UP_EOT / CAN high – no retry
GADG1612160823PS
t
VPRE
Power On Reset
V3V3A/D
VB_IN
Internal OVC flag
FAULT
MRD out
MSC CMD (ON/OFF)
MSC READ
PHOLD
WAKE_UP_CAN_DET
WAKE_UP_EOT_DET
WK_IN_DET
KEY_IN
power on by KEY detection
power on by WK_IN detection
detection
power on by WAKE_UP_EOT / CAN
on
I_LS_ovc_flt
off
OVC
restart
I_LS_ovc_flt
OVC
on
off
restart
restart conditions during KEY or WK_IN or WAKE_UP_EOT / CAN detection
SCENARIO 19 - MRD overcurrent in permanent battery
on
I_LS_ovc_flt
OVC
off
restart



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