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L9680 Datasheet(PDF) 243 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) 243 Page - STMicroelectronics

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DocID029257 Rev 1
243/277
L9680
Electrical characteristics
276
Table 45. SYNCBOOST converter AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1FSW_SYNCBST
SYNCBST
switching frequency
-
1.8
1.882
2.0
MHz
2
TRISE_SYNCBSTSW_SLOW
TFALL_SYNCBSTSW_SLOW
SYNCBSTSW
transition time
10% to 90% voltage on
SYNCBSTSW
VIN = VINFASTSLOPE_H
Design Info
15
-
30
ns
3
TRISE_SYNCBSTSW_FAST
TFALL_SYNCBSTSW_FAST
10% to 90% voltage on
SYNCBSTSW
VIN = VINFASTSLOPE_L
Design Info
5
-
20
ns
4TSOFTST_SYNCBST
SYNCBST Soft-
start Time
Design Info.
Time from activation of
SYNCBOOST when
overcurrent is 40 % of
IOC_SYNCBST_HIGH
(IOC_SYNCBST_LOW) to
instant when overcurrent is
100% of IOC_SYNCBST_HIGH
(IOC_SYNCBST_LOW)
-
-
1075
μs
5TFLT_TSD_SYNCBST
Thermal shutdown
filter time
--
-
10
μs
6TBLK_SYNCSW
Sync boost
activation blanking
time after thermal
shutdown
--
1
-
ms
Table 46. SYNCBOOST converter external components design info
No
Symbol
Component
Conditions
Min
Typ
Max
Unit
1LSYNCBST
Inductance
Min 4.7 μH nominal
3.76
-
-
μH
2
ESLSYNCBST
Inductance resistance
-
-
-
0.1
Ω
3CBLK_SYNCBST
Output bulk capacitance
Min 2.2 μF nominal
1.76
-
-
μF
4
ESRCBLK_SYNCBST Bulk capacitor ESR
-
-
-
50
mΩ
5VFSTR
Steering diode forward
voltage
IF = 1 A
-
-
0.5
V
6ILKGSTR
Steering diode reverse
leakage
Ta = 95 °C
-
-
3
mA



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