Datasheet

iC-NZN
N-TYPE LASER DIODE DRIVER
Rev C1, Page 13/17
RMD
&
REF
GND
AGND
100 nF..
IMON
LDK
EN
+
SYN
Bandgap, Reference, Overtemp
T.PAD
..300mA
RSI
Low V(LDA)
GND
VDD
..10 nF..
EP
1
+3..+5.5V
NSLP
NERR
1
CI
VDD
0.68..
1
REGE
TTL
LDA MONITOR
-
MD
..300mA
VDD
x240
-
+
CID
AVG
&
RVDD
CVDD
OUTPUT DRIVER
CI
RSI
VSY
i(RSI)x540
1
RSI
LVDS/TTL
CIS
&
ECI
ECI
INPUT INTERFACE
PMD
&
9kΩ
iC-NZN
CI
LDA
CLDA
OUTPUT MONITOR
OverTemp.
OverCurrent
RMD
100 nF..
PMD
Figure 7: Example set-up for current control
BLUE LASER DIODES
With the iC-NZN also blue laser diodes can be driven.
Due to the high forward voltage of these laser diodes,
an appropriate supply voltage must be provided. The
current limitation at pin LDA cannot be used then, since
only pin LDK is capable of handling the higher voltage
required for the blue laser diodes. Nevertheless, the
current limitation protection in pin LDK (cf. Electrical
Characteristics No. 107) is still active. Figure 8 shows
a typical set-up for blue laser diodes with APC and fig-
ure 9 with ACC.
EP
T.PAD
MD
i(RSI)x540
LDK
LDA
PMD
TTL
+
NERR
VDD
REF
RMD
VSY
GND
SYN
RVDD
LDA MONITOR
..300mA
CIS
+
OUTPUT DRIVER
-
GND
..10 nF..
VDD
LVDS/TTL
ECI
-
CI
AVG
RSI
CID
..300mA
..12V
ECI
RGND
INPUT INTERFACE
&
AGND
1
1
&
IMON
Low V(LDA)
RSI
x240
RMD
NSLP
&
100 nF..
PMD
Bandgap, Reference, Overtemp
RSI
1
VDD
&
EN
CVDD
OverCurrent
OUTPUT MONITOR
1
M
CI
0.68..
100 nF..
iC-NZN
9kΩ
OverTemp.
CL
REGE
M
+3..+5.5V
CI
Figure 8: Set-up for blue laser diodes with APC