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L9965P Scheda tecnica(PDF) 88 Page - STMicroelectronics

Il numero della parte L9965P
Spiegazioni elettronici  Automotive single channel pyro-fuse driver
PDF  104 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9965P Scheda tecnica(HTML) 88 Page - STMicroelectronics

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4.1.4
24 V DC-DC with MCU and ERBST not mounted
The Figure 32 shows a typical application diagram for a pyro-fuse system not using the ERBST regulator and
interfaced with a generic MCU.
Figure 32. Application circuit: 24 V DC-DC with MCU and ERBST not mounted
Arming logic
Deployment
driver
3V3 int
regulator
ER boost regulator
ER discharge
switch
Global configuration and
control, ADC, bias and
diagnostics
5V or 3.3V
PS
FAULTN
CWUP
NCS
SCLK
SDI/MOSI
SDO/MISO
Power management, diagnostics and monitoring
CIN
PF
PR
PYRO
FUSE
VIO
PGND
RFAULTN
CVIO
CPF
CPR
MCU
CFAULTN
24V
DC-DC
+
-
DIN
MCU
PMIC
CER1
CER2
The ERBST regulator is kept disabled and its components are not mounted. The diode DIN is optional and is used
to avoid back feeding to the DC-DC regulator.
Note:
See the dedicated Application Note.
L9965P
Application scenarios
DS14702 - Rev 4
page 88/104



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