IC-HT Datasheet, PDF (19/42 Pages) IC-Haus GmbH – DUAL CW LASER DIODE DRIVER

iC-HT
DUAL CW LASER DIODE DRIVER
Pin
EC2
DISC2
(Addr. 0x15 )
EMCOPEN
INSOPEN
preliminary
Rev A1, Page 19/42
1
&
ENCH2
STATUS0 (Addr. 0x00)
0 INITRAM
1 PDOVDD
2 MEMERR
3
OVT
4 OVC2
5 OVC1
6
7 CFGTIMO
DISC1
(Addr. 0x10 )
EC1
Pin
1
1
1
&
Figure 7: Laser control logic in MCU mode
ENCH1
COMBINING BOTH CHANNELS
iC-HT can drive one laser diode up to 1500 mA with
both channels combined.
MERGE
0
1
Addr. 0x1B; bit 6
R/W 0
Channel 1 and 2 operate independently
Power transistor from channel 2 in parallel with
channel 1, controlled by channel 1
Table 42: Channel merging
Therefore register bit MERGE must be set to 1. Dis-
able channel register bits DISC1 and DISC2 must both
be set to 0 and both enable channel pins EC1 and EC2
must be set hi.
When both channels are combined the control is done
by channel 1. APC and ACC can both be used with
both channels combined. In ACC mode, the reference
needs be set to 50% of the desired current value. This
is not required for APC.