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L9679P Datasheet(PDF) 232 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) 232 Page - STMicroelectronics

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Electrical characteristics
L9679P
232/272
DocID029275 Rev 1
17.9
ER CAP current generators and diagnostic
All electrical characteristics are valid for the following conditions unless otherwise noted:
-40 °C
 Ta  +95 °C, VINGOOD0  VIN  35 V, 8 V ≤ ERBOOST.
5VFSTR_ERBST
Steering diode forward
voltage
IF=100 mA
-
-
0.85
V
6ILKGSTR_ERBST
Steering diode reverse
leakage
Ta = 95 °C
-
-
3
mA
Table 37. ERBOOST Converter external components design info (continued)
No
Symbol
Component
Conditions
Min
Typ
Max
Unit
Table 38. ER CAP current generators and diagnostic DC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1IER_CHARGE
ER charge current
ERBOOST
 8 V
60
65
70
mA
ERBOOST – VER
 2 V
2IER_DISCHARGE_LOW
ER discharge low level
current
VER
 6V
60
65
70
mA
3IER_DISCHARGE_HIGH
ER discharge high level
current
VER
 8V
589
640
691
mA
4RDSON_ERCHARGE
ER charge power
resistance
(VERBOOST - VVER)/IVER
IVER = 10mA
--
20
Ω
5
VERRANGE
VER voltage measurement
range
-
20
-
35
V
6
VERACC
VER voltage measurement
accuracy
VERRANGE
-8
-
+8
%
7
ERCAPRANGE
Energy reserve capacitor
measurement range
Design Info
-
-
10
mF
8
ERCAPACC
Energy reserve capacitor
measurement accuracy
VERMIN = 2 V
-7
-
+7
%
9
ERCAP_ESRRANGE
Energy reserve capacitor
ESR measurement range
-
200
-
600
mΩ
10
ERCAP_ESRACC
Energy reserve capacitor
ESR measurement
accuracy
All errors included
except the offset one
(OFFER_ESR)
-20
+20
%
11
GER_ESR
Energy Reserve Capacitor
ESR Measurement Gain
-
-13%
3
+13%
V/V
12
OFFER_ESR
Energy Reserve Capacitor
ESR Measurement Offset
Design Info
70
-
160
mΩ



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