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L9396 Folha de dados(PDF) 71 Page - STMicroelectronics

Nome de Peças L9396
Descrição Electrónicos  Automotive multiple power supply IC
PDF  109 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9396 Folha de dados(HTML) 71 Page - STMicroelectronics

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DS12539 Rev 6
71/109
L9396
System functional safety implementations
108
After that FAULT stays enabled until power down by wake-up is triggered or undervoltage of
VPREREG is generated.
Here the table of masking bits and fault sources
40°C ≤ Tj ≤ 175°C; 3 V ≤ VCC ≤ 5.5 V, unless otherwise specified.
7.4
Watchdog control
This device offers a 2-level watchdog control approach. The first control level is given by
means of a query & answer watchdog (WD1). The second control level controls the PRN
input pin to assert the proper frequency is delivered by the microcontroller (WD2).
Table 51. Masking bits and fault sources
-
FAILSAFE / FAULT
OUTPUT
WD1 and WD2
FAULT MASK
FAILSAFE / FAULT
OUTPUT
THERMAL WARNING
MASK
FAILSAFE / FAULT
OUTPUT
µC VOLTAGE FAULT
MASK
FAILSAFE / FAULT
OUTPUT
BOOST FAULT
MASK
WD Q/A ERR
MASKED
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
WD PRUN ERR MASKED
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
BOOST OT
INTERRUPT /
WARNING LAMP
MASKED
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
BUCK OT
INTERRUPT /
WARNING LAMP
MASKED
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
CP OT
INTERRUPT /
WARNING LAMP
MASKED
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
VCORE UV/OV
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
MASKED
INTERRUPT /
WARNING LAMP
VCC5 UV/OV
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
MASKED
INTERRUPT /
WARNING LAMP
BOOST UV
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
INTERRUPT /
WARNING LAMP
MASKED
IGN EDGE
INTERRUPT
INTERRUPT
INTERRUPT
INTERRUPT
Table 52. Fault characteristics
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
VOL
Fault logic output low voltage
Isource = 1 mA
-
-
0.4
V
VOH
Fault logic output high voltage
Isink = 1 mA
VCC-0.4
-
-
V
tFAULT_ACT Fault actuation time
-
35
48
60
µs



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