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L9679P Datasheet(PDF) 236 Page - STMicroelectronics

Part # L9679P
Description  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  279 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 236 Page - STMicroelectronics

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Electrical characteristics
L9679P
236/279
DS11627 Rev 7
18.9
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.
5
VFSTR_ERBST
Steering diode forward
voltage
IF=100 mA
-
-
0.85
V
6
ILKGSTR_ERBST
Steering diode reverse
leakage
Ta = 95 °C
-
-
3
mA
Table 38. ERBOOST Converter external components design info (continued)
No
Symbol
Component
Conditions
Min
Typ
Max
Unit
Table 39. ER CAP current generators and diagnostic DC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1
IER_CHARGE
ER charge current
ERBOOST  8
VERBOOST - VER 2V
ERBOOST = 24 V and
35 V
60
65
70
mA
2
IER_DISCHARGE_LOW
ER discharge low level
current
VER  6V
60
65
70
mA
3
IER_DISCHARGE_HIGH
ER discharge high level
current
VER  8V
589
640
691
mA
4
RDSON_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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