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L9679P Datasheet(PDF) 237 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) 237 Page - STMicroelectronics

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DS11627 Rev 7
237/279
L9679P
Electrical characteristics
278
18.10
ER switch
All electrical characteristics are valid for the following conditions unless otherwise noted:
-40 °C  Ta  +95 °C, VINGOOD0  VIN  35 V.
13
TJSD_ERBST
ER charge thermal
shutdown
-
150
175
190
°C
14
THYS_TSDERBST
-
5
10
15
°C
15
VVER_VBATMON_TH
Voltage difference
between VER and
VBATMON to activate the
ER Discharge in passive
mode
VER - VBATMON
1.6
2.2
2.5
V
Table 39. ER CAP current generators and diagnostic DC specifications (continued)
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 40. ER CAP current generators and diagnostic AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1
TON_ERCAP
Energy reserve capacitor
charge-up time
CVER  10mF nominal,
BST33V = 0, Design Info
-
-
4
s
2
TESR_DIAG
ER CAP ESR diagnostic
duration
Total duration time from SPI
command to ADC results
availability
-5%
225
+5%
µs
3
TFLT_TSD_ERCHARGE
Thermal shutdown filter
time
-
-
-
10
µs
Table 41. ER Switch DC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1
RDSON_ERSW Power switch resistance
Vin = 5.5 V and 35 V
0.5
-
3
Ω
2
ILIM_ERSW
ER switch current limit
VER = 17 V@ Vin = 12 V and
VER = 35 V@ VIN = 31 V
600
810
980
mA
3
VER_SW_OV_TH
ER switch Over Voltage
threshold
Test go / no go
ER switch turned off when
Vin > VER + VER_SW_OV_TH
Vin = 12 V and 35 V
10
-
200
mV
4
TJSD_ERSW
Thermal shutdown
-
150
175
190
°C
5
THYS_TSDERSW
-
5
10
15
°C



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