MIC2873 Datasheet, PDF (15/24 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
MIC2873
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, and the TCUR register setting.
Table 4. Torch Current Register Mapping into Internal TEN
and TCUR Registers, and Relationship between Torch
Current and the TCUR Register Setting
Dec.
TEN/TCUR[4:0] Value
Binary TEN[4] TCUR[3:0]
ITORCH (mA)
0
00000
0
0000
300.0
1
00001
0
0001
287.5
2
00010
0
0010
275.0
3
00011
0
0011
262.5
4
00100
0
0100
250.0
5
00101
0
0101
237.5
6
00110
0
0110
225.0
7
00111
0
0111
212.5
8
01000
0
1000
200.0
9
01001
0
1001
187.5
10 01010
0
1010
175.0
11 01011
0
1011
162.5
12 01100
0
1100
150.0
13 01101
0
1101
137.5
14 01110
0
1110
100.0
15 01111
0
1111
62.5
16 10000
1
0000
300.0
17 10001
1
0001
287.5
18 10010
1
0010
275.0
19 10011
1
0011
262.5
20 10100
1
0100
250.0
21 10101
1
0101
237.5
22 10110
1
0110
225.0
23 10111
1
0111
212.5
24 11000
1
1000
200.0
25 11001
1
1001
187.5
26 11010
1
1010
175.0
27 11011
1
1011
162.5
28 11100
1
1100
150.0
29 11101
1
1101
137.5
30 11110
1
1110
100.0
31 11111
1
1111
62.5
July 17, 2014
15
Revision 1.0