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UM1557 Datasheet(PDF) 86 Page - STMicroelectronics

Part # UM1557
Description  The aim of this document is to give the design engineer
PDF  111 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM1557 Datasheet(HTML) 86 Page - STMicroelectronics

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Operation with AMICO
UM1557
86/111
Doc ID 023521 Rev 2
The following tables display some recommended AMICO settings for the open load and
overload thresholds of the internal diagnostic, as well as the resulting ratio between IMUX
and ISENSE. ISENSE is the current sense of the HSD and IMUX is the current supplied by the
AMICO on the MUX_ST/CS pin.
Several combinations of load/HSD are considered. The green-highlighted rows are
recommended settings, based on the assumption that the ratio between overload and
nominal current at Vbat = 24 V is about 2:1.
Device
Typical K-factor
VN5T006ASP
10000
VN5T016ASP
5000
VND5T035AKLamp type
2870
VND5T100AJ
1500
Table 9.
Typical load currents and HSDs’ K-factors
Lamp type
DC current@Vbat=24 V
[A]
Table 10.
Amico’s typical on-board open load and overload thresholds
Device/Load
VN5T006ASP
Bulb 5x21W
4.40
12.0
2.73
0.50
0.11
0.83
0.59
0
0,0
4.40
24.0
5.45
0.50
0.11
0.50
0.35
0
0,1
4.40
36.0
8.18
1.00
0.23
0.33
0.23
0
1,0
4.40
60.0
13.64
4.00
0.91
0.17
0.12
0
1,1
VN5T006ASP
Bulb 6x21W
5.28
12.0
2.27
0.50
0.09
0.83
0.70
0
0,0
5.28
24.0
4.55
0.50
0.09
0.50
0.42
0
0,1
5.28
36.0
6.82
1.00
0.19
0.33
0.28
0
1,0
5.28
60.0
11.36
4.00
0.76
0.17
0.14
0
1,1
VN5T006ASP
Bulb 2x70W+2x21W
6.60
12.0
1.82
0.50
0.08
0.83
0.88
0
0,0
6.60
24.0
3.64
0.50
0.08
0.50
0.53
0
0,1
6.60
36.0
5.45
1.00
0.15
0.33
0.35
0
1,0
6.60
60.0
9.09
4.00
0.61
0.17
0.18
0
1,1
VN5T016ASP
4x21W + 10W
3.93
6.00
1.53
0.25
0.06
0.83
1.05
0
0,0
3.93
12.0
3.05
0.25
0.06
0.50
0.63
0
0,1
3.93
18.0
4.58
0.50
0.13
0.33
0.42
0
1,0
3.93
30.0
7.63
2.00
0.51
0.17
0.21
0
1,1



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