MIC2871 Datasheet, PDF (14/24 Pages) Micrel Semiconductor – 1.2A High-Brightness LED Flash Driver with Single-Wire Serial Interface

Micrel, Inc.
Table 3. Flash Current Register Mapping into Internal
FEN and FCUR Registers, and Relationship between
Flash Current as % of Maximum Current and the
FCUR Register Setting
Value
FEN/FCUR[4:0]
Dec. Binary
FEN[4]
FCUR[3:0] % of IMAX
0
00000
0
100.00
1
00001
0
88.96
2
00010
0
79.04
3
00011
0
70.72
4
00100
0
63.04
5
00101
0
56.00
6
00110
0
49.92
7
00111
0
44.64
8
01000
0
39.68
9
01001
0
35.52
10
01010
0
31.68
11
01011
0
28.16
12
01100
0
25.12
13
01101
0
22.40
14
01110
0
20.00
15
01111
0
17.92
16
10000
1
100.00
17
10001
1
88.96
18
10010
1
79.04
19
10011
1
70.72
20
10100
1
63.04
21
10101
1
56.00
22
10110
1
49.92
23
10111
1
44.64
24
11000
1
39.68
25
11001
1
35.52
26
11010
1
31.68
27
11011
1
28.16
28
11100
1
25.12
29
11101
1
22.40
30
11110
1
20.00
31
11111
1
17.92
MIC2871
Torch Current Register (TEN/TCUR: default 0)
The torch current register enables and sets the torch
mode current level. Valid values are 0 to 31; values 0 −
15 will set the torch current without enabling the torch
(such that it can be triggered by setting the internal TEN
register value to 1), values 16 − 31 will set the torch
current and enable the torch. A value of 0 at the internal
TEN register will disable the torch. The torch current
register maps into the internal TEN and TCUR registers
as shown in Table 4. The table also describes the
relationship between the torch current as a percentage of
maximum current, and the TCUR register setting.
May 29, 2013
14
052913-1.0 (while in progress)
Revision 1.0 (final document)