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L9001 データシート(PDF) 35 Page - STMicroelectronics

部品番号 L9001
部品情報  Automotive power supply IC with multiple voltage regulators
PDF  38 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9001 データシート(HTML) 35 Page - STMicroelectronics

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DS12089 Rev 2
35/38
L9001
Appendix A
37
Appendix A
The following table summarizes what happens if a fault condition is detected in ACTIVE
state indicating the next state and the behavior of FC, Refresh FC counter and thresholds.
Table 20. Clarify transitions from and to ACTIVE mode
Fail / Current
status
ACTIVE
(no
overtemperature
& no CP
undervoltage)
ACTIVE
(after
overtemperature
fault)
ACTIVE
(after CP
undervoltage
fault)
ACTIVE
(after
overtemperature & CP
undervoltage)
VS undervoltage
– SAFE state
– FC = FC
– Refresh FC
threshold =
default (30 s)
– Refresh FC is not
triggered when
device comes
back in ACTIVE
– SAFE state
– FC = FC
– Refresh FC
threshold = 30 s
– Refresh FC restart
from 0 when device
comes back in
ACTIVE
– SAFE state
– FC = FC
– Refresh FC threshold
= 100 ms
– Refresh FC restart
from 0 when device
comes back in
ACTIVE
– SAFE state
– FC = FC
– Refresh FC threshold
= 30 s
– Refresh FC restart
from 0 when device
comes back in
ACTIVE
Overtemperature
– SAFE state
– FC = FC+1
– Refresh FC
threshold = 30 s
– Refresh FC is
triggered when
device comes
back in ACTIVE
– FC = FC+1 →SAFE
state if FC < 4
– FC = FC+1 →SAFE
state and the next
clk cycle Latch state
if FC = 4
– Refresh FC
threshold = 30 s
– Refresh FC restart
from 0 if device
comes back in
ACTIVE
– FC = FC+1 →SAFE
state if FC < 4
– FC = FC+1 →SAFE
state and the next clk
cycle Latch state if
FC = 4
– Refresh FC threshold
replaced from 100 ms
to 30 s
– Refresh FC restart
from 0 if device
comes back in
ACTIVE
– FC = FC+1 →SAFE
state if FC < 4
– FC = FC+1 →SAFE
state and the next clk
cycle Latch state if
FC = 4
– Refresh FC threshold
= 30 s
– Refresh FC restart
from 0 if device comes
back in ACTIVE
CP undervoltage
– SAFE state
– FC = FC+1
– Refresh FC
threshold =
100 ms
– Refresh FC is
triggered when
device comes
back in ACTIVE
– FC = FC+1 →SAFE
state if FC < 4
– FC = FC+1 →SAFE
state and the next
clk cycle Latch state
if FC = 4
– Refresh FC
threshold = 30 s
– Refresh FC restart
from 0 if device
comes back in
ACTIVE
– FC = FC+1 →SAFE
state if FC < 4
– FC = FC+1 →SAFE
state and the
– next clk cycle Latch
state if FC = 4
– Refresh FC threshold
= 100 ms
– Refresh FC restart
from 0 if device
comes back in
ACTIVE
– FC = FC+1 →SAFE
state if FC < 4
– FC = FC+1 →SAFE
state and the next clk
cycle Latch state if
FC = 4
– Refresh FC threshold
= 30 s
– Refresh FC restart
from 0 if device comes
back in ACTIVE



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