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L9679P Datasheet(PDF) 240 Page - STMicroelectronics

No. de pieza L9679P
Descripción Electrónicos  Automotive advanced airbag IC for mid/high end applications
PDF  272 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 240 Page - STMicroelectronics

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Electrical characteristics
L9679P
240/272
DocID029275 Rev 1
18
VCCUV3V
VCC under voltage
detection high
VCCSEL < VTH2_L_VCCSEL
3.0
-
3.17
V
19
VCCUV5V
VCCSEL > VTH2_H_VCCSEL
4.5
-
4.75
V
20
VCCUVL
VCC under voltage
detection low
-
1.8
2
2.2
V
Table 50. VCC converter DC specifications (continued)
No
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Table 51. VCC converter AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max Units
1FSW_VCCBCK
VCCBUCK switching
frequency
-
1.8
1.882
2.0
MHz
2
TRISE_VCCBCKSW
TFALL_VCCBCKSW
VCCBCKSW transition time
10% to 90% voltage on
VCCBCKSW
Design Info
8
-
20
ns
3TSOFTST_VCCBCK VCCBUCK soft start time
From 10% to 90%
0.5
-
2
ms
4TFLT_VCCOV
VCC over voltage
detection deglitch filter time
-27
30
33
μs
5
TFLT_VCCOV_RAMPUP
VCC Over voltage
detection deglitch filter time
during VCC_RAMPUP state
VCC reg in VCC_RAMPUP
state
1.5
2
2.5
μs
6TFLT_VCCUV
VCC under voltage
detection deglitch filter time
-27
30
33
μs
7TFLT_VCCUVL
VCC under voltage low
detection deglitch filter time
-
1.5
2
2.5
μs
Table 52. VCC converter external components design info
No
Symbol
Component
Conditions
Min
Typ
Max
Unit
1LVCCBCK
Inductance
Min 4.7 μH nominal
3.76
-
-
μH
2
ESRLVCCBCK
Inductance resistance
-
-
-
0.25
Ω
3CBLK_VCCBCK
Output bulk capacitance
Min 4.7 μF nominal
3
-
30
μF
4
ESRCBLK_VCCBCK Bulk capacitor ESR
-
-
-
50
mΩ



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