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L99LD21 Datasheet(PDF) 65 Page - STMicroelectronics

No. de pieza L99LD21
Descripción Electrónicos  High power LED driver for automotive applications
PDF  73 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99LD21 Datasheet(HTML) 65 Page - STMicroelectronics

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DS11130 Rev 5
65/73
L99LD21
Electrical specifications
72
6.4.7
Digital timings
Table 46. Digital timings description
Symbol
Parameter
Test conditions
Min
Typ
Max
Unit
tWD
Watchdog timeout
period
45
50
55
ms
tCSN_TIMEOUT
CSN timeout
90
115
140
ms
tAUTORESTART
Autorestart time in limp
home mode
45
50
55
ms
tVS,UV
VS undervoltage filter
time
32
µs
tDIN_FT
(1)
DIN Filter time
32
µs
tDIN_ST
DIN status information
time
12.8
µs
tSKEW
Timing skew for DIN
2.5
µs
tVSPI_FT
VSPI Filtering Time
32
µs
tWAKE_UP
Time for a complete
wake up (V3V3 >
VPOR_L)
CSN low or DIN high for
t > tWAKEUP
Cap on V3V3 = 4.7 µF
V3V3 > 3 V
190
µs
tSTDBY
Time needed for a
transition to standby
mode (V3V3 < VPOR_L)
DIN low
Cap on V3V3 = 4.7 µF
V3V3 < 2.5 V
1.6
ms
tOVT
Filtering time for
overtemperature (OVT
bit will be set if Tj >
TTSD for more than
tOVT)
guaranteed by
frequency oscillator
(20 MHz typical) and
scan
1.2
µs
tBST_OVP
BST_OVP flag set
filtering time
32
µs
tBST_OVP_RST
BST_OVP flag reset
filtering time
10
ms
tBOOST_FB_FAIL
BST_FB_FAIL flag set
filtering time
1.6
µs
1.
Digital timings guaranteed by scan. WD and autorestart timings limits added to give indication on application cases.



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