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L9679P датащи(PDF) 31 Page - STMicroelectronics

номер детали L9679P
подробное описание детали  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  279 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P датащи(HTML) 31 Page - STMicroelectronics

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DS11627 Rev 7
31/279
L9679P
Start-up and power control
278
Figure 5. Wake-up input signal behaviour
Condition summary:
1. No change of sleep mode state but current consumption may exceed specification for
sleep mode.
2. The sleep mode current returns to within specified limits.
3. Power supply exits sleep mode. Switchers start operating if applicable voltages exceed
under voltage lockouts. As Twakeup timeout is not elapsed, a low level at WAKEUP
instantaneously sends the system back to sleep.
4. Sleep reset is released and the entire system starts operating. An SPI command to
enter sleep state would not be executed.
5. No change in system status, an SPI command to turn off switchers would be ignored.
6. No change in system status, but an SPI command to turn off switchers would be
accepted and turn the system off.
With the below table, all the functionalities of the device are shown with respect to the power
states. When one function is flagged, the related circuitry cannot be activated on that state.
WAKEUP
t
<1ms
1ms
<1ms
1ms
1
2
3
5
6
10ms
4
SLEEP MODE
ACTIVE MODE
PASSIVE MODE
WU_on
WU_off
WakeUpFilt
t
GAPGPS02251
Table 4. Functions disabling by state
Functions
Power MODE
Power
off
Sleep
Active
Passive
Power
off
Wakeup
monitor Awake Startup Run
Power mode
shutdown
ER
VINGOOD
blanking
Wakeup detector
X
Internal regulators
X
X
ERBOOST regulator
X
X
X
X
SYNCBOOST regulator
X
X
X
ER CAP charge current
X
X
X
X
X
X
ER CAP discharge current
X
X
X
X
X
ER switch
X
X
X
X
X
COVRACT
X
X
X
X
X
X



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