MIC2874 Datasheet, PDF (16/22 Pages) Micrel Semiconductor – 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface

Micrel, Inc.
Safety Timer Threshold Current Register
(ST_TH: default 4)
Safety timer threshold current determines the amount of
LED current flowing through the external LED before the
internal LED safety timer is activated. Setting ST_TH to 0
disables the safety timer function, and setting the register
to values 1 to 5 set the safety time threshold current
100mA to 300mA in 50mA steps.
Table 7. Safety Timer Threshold Current Register Setting
and Safety Timer Threshold Current
Value
Dec. Binary
ST_TH[2:0]
Safety Timer Threshold
Current (mA)
0
000
000
Disabled
1
001
001
100
2
010
010
150
3
011
011
200
4
100
100
250
5
101
101
300
MIC2874
August 26, 2014
16
Revision 1.0