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L9678P Datasheet(PDF) 182 Page - STMicroelectronics

Part # L9678P
Description  Automotive user configurable airbag and battery cut-off IC
PDF  215 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Datasheet(HTML) 182 Page - STMicroelectronics

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Electrical characteristics
L9678P, L9678P-S
182/216
DS11626 Rev 9
Table 28. ER boost converter AC specifications
N°
Symbol
Parameter
Condition
Min. Typ. Max. Unit
1
FSW_ERBST
ERBOOST switching
frequency
-
1.8 1.882 2.0 MHz
2
TRISE_ERBSTSW_SLOW
TFALL_ERBSTSW_SLOW
ERBSTSW transition time
10% to 90% voltage on
ERBSTSW
VIN ≥ VINFASTSLOPE_L =
10.3 V
Iload = 60mA
ERboost settings 23 V
Guaranteed by design
10
15
-
25
35
ns
3
TRISE_ERBSTSW_FAST
TFALL_ERBSTSW_FAST
10% to 90% voltage on
ERBSTSW
VIN ≤ VINFASTSLOPE_H=
9 V
Iload=60mA
ERboost settings 23 V
Guaranteed by design
10
-
25
ns
4
TON_ERBST
ERBOOST charge-up time
CERBOOST = 2.2µF,
Vin =12V, IO_ERBST=
5mA
BST33V = 1
Measured from CS edge
to VO_ERBST(min)
-
-
5
ms
5
TFLT_TSD_ERBST
Thermal shutdown filter time -
-
10
µs
Table 29. ER boost converter external components (Design Info)
N°
Symbol
Parameter
Condition
Min.
Typ. Max. Unit
1
LERBST
Inductance
-
8
10
-
µH
2
ESLERBST
Inductance resistance
-
-
-
0.1
Ω
3
CBLK_ERBST
Output bulk capacitance
to ensure regulator
stability
Min capacitance value including
derating factors
1
2.2
µF
4
ESRCBLK_ERBST Bulk capacitor ESR
-
-
-
0.1
5
VFSTR_ERBST
Steering diode forward
voltage
IF=100 mA
-
-
0.85
V
6
ILKGSTR_ERBST
Steering diode reverse
leakage
Ta = 95 °C
-
-
100
µA



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