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L9680 Datasheet(PDF) 240 Page - STMicroelectronics

Part # L9680
Description  Automotive advanced airbag IC for mid/high end applications
PDF  277 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 Datasheet(HTML) 240 Page - STMicroelectronics

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Electrical characteristics
L9680
240/277
DocID029257 Rev 1
16.10
ER switch
All electrical characteristics are valid for the following conditions unless otherwise noted:
-40 °C
 Ta  +95 °C, VINGOOD0  VIN  35 V.
Table 39. ER CAP current generators and diagnostic AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1TON_ERCAP
Energy reserve capacitor
charge-up time
CVER  10mF nominal,
BST33V = 0, Design Info
--
4
s
2TESR_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 40. ER Switch DC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1RDSON_ERSW
Power switch resistance
-
0.5
-
3
Ω
2ILIM_ERSW
ER switch current limit
-
608
810
980
mA
3VER_SW_OV_TH
ER switch Over Voltage
threshold
ER switch turned off when
VIN > VER + VER_SW_OV_TH
10
-
200
mV
4TJSD_ERSW
Thermal shutdown
-
150
175
190
°C
5THYS_TSDERSW
-
5
10
15
°C
Table 41. ER Switch AC specifications
No
Symbol
Parameter
Conditions
Min
Max
Unit
1TON_ERSW
ER turn-on time (time to
reach either RDSON_ERSW or
ILIM_ERSW)
CVIN = 10 μF-
-
5
μs
2TFLT_TSD_ERSW Thermal shutdown filter time -
-
-
10
μs
3TBLK_ERSW
ER switch activation
blanking time after thermal
shutdown
--
1
-
ms



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