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L9788 데이터시트(PDF) 87 Page - STMicroelectronics

부품명 L9788
상세설명  Multifunction IC for automotive engine management system
PDF  264 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9788 데이터시트(HTML) 87 Page - STMicroelectronics

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DS12308 Rev 4
87/264
L9788
Low-side drivers
263
Figure 33. Low-side driver OFF state diagnosis timings
If DiagOL or DiagLV signals remain high for a time higher than Diag Filter Time the fault bit
is set and can be read by Read Diag Communication.
This bit is reset by every Read Diag Communication.
7.1.5
Error handling
GADG0112161213PS
V_OL
VLVT
COMMAND
COMMAND
VOUT
< Tflt_diagoff
Tflt_diagoff
LOW SIDE OUTPUT VOLTAGE
OPEN LOAD
t
DIAG
OFF FAULT
OPEN LOAD
OFF
NO FAULT
NO FAULT
V_OL
VLVT
COMMAND
VOUT
Tflt_diagoff
LOW SIDE OUTPUT VOLTAGE
t
DIAG
OFF FAULT
OFF
NO FAULT
V_OL
VLVT
VOUT
< Tflt_diagoff
NORMAL LOAD
LOW SIDE OUTPUT VOLTAGE
t
DIAG
OFF
NO FAULT
NO FAUT
V_OL
VLVT
COMMAND
VOUT
< Tflt_diagoff
Tflt_diagoff
LOW SIDE OUTPUT VOLTAGE
t
DIAG
OFF
FAULT
FAULT
FASTCHARGE
OFF FAULT
SHORT-TO-GROUND LOAD
SHORT-TO-GROUND LOAD
SHORT-TO-GROUND LOAD
SHORT-TO-GROUND LOAD
Table 43. Low-side driver error handling
Type of error
Detection
condition
Action
Clear MSC
flag
Restart condition
Driver Diagnostic
Overcurrent (OVC)
Driver on
Driver is put in off
state. The fault is
latched in MSC
diagnosis register.
On read
At MSC read of diagnosis
register if MSC command is
still high. If MSC command
is low and high again.
Short to ground (STG)
Driver off
The fault is latched in
MSC diagnosis
register.
On read
-
Open load (OPL)
Driver off
The fault is latched in
MSC diagnosis
register.
On read
-



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