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L9680 Datasheet(PDF) 237 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) 237 Page - STMicroelectronics

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DocID029257 Rev 1
237/277
L9680
Electrical characteristics
276
12
VERBST_OK
ERBOOST voltage
threshold
BST33V = 0
18
20
22
V
13
BST33V = 1
26
28
30
V
14
VERBST_OV
ERBOOST Over Voltage
threshold
SYS_CTL(ER_BST_V) = 0
22.6
-
25
V
15
SYS_CTL(ER_BST_V) = 1
31.65
-
35
V
16
VERBST_DIS_TH
Voltage difference
between VIN and
ERBOOST to deactivate
the ER Boost regulator
VIN – ERBOOST
1.6
2.2
2.5
V
17 VERBST_CLAMP_EN_TH
Voltage difference
between ERBSTSW and
ERBOOST to activate the
ER Boost CLAMP
VERBSTSW – VERBOOST
2.7
3.3
3.7
V
18
TJSD_ERBST
Thermal shutdown
-
150
175
190
°C
19
THYS_TSDERBST
-
5
10
15
°C
Table 35. ERBoost regulator DC specifications (continued)
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 36. ERBoost regulator AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1FSW_ERBST
ERBOOST switching
frequency
-
1.8
1.882
2.0
MHz
2
TRISE_ERBSTSW_SLOW
TFALL_ERBSTSW_SLOW
ERBSTSW transition
time
10% to 90% voltage on
ERBSTSW
VIN ≥ VINFASTSLOPE_H =
10.3 V
Iload = 6 0mA
SYS_CTL(ER_BST_V) = 1
Guaranteed by Design
15
-
35
ns
3
TRISE_ERBSTSW_FAST
TFALL_ERBSTSW_FAST
10% to 90% voltage on
ERBSTSW
VIN = VINFASTSLOPE_L =9 V
5
-
15
ns
4TON_ERBST
ERBOOST charge-up
time
CERBOOST = 2.2 μF
Vin =12V, IO_ERBST= 5mA
SYS_CTL(ER_BST_V) = 1
Measured from CS_G
edge to VO_ERBST(min)
50
-
500
μs
5TFLT_VIN_ERBST_COMP
Deglitch filter on
VIN_ERBoost
comparator
-27
30
33
μs



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