IC-NZP_11 Datasheet, PDF (12/15 Pages) IC-Haus GmbH – P-TYPE LASER DIODE DRIVER

iC-NZP
P-TYPE LASER DIODE DRIVER
preliminary
Rev B1, Page 12/15
Special care must be taken in PCB layout when laying
out the path from the laser diode’s cathode to GND.
This path must be kept as short as possible to avoid
parasitic inductances. A snubber network across the
laser diode also helps to compensate for these para-
sitic inductances.
+3..+5.5V
CVDD
100 nF..
RSI
0.68.. 9kΩ
GND
VDD
RSI
NSLP
REGE
i(RSI)x540
LDA MONITOR
VD D
AVG
&
VSY
SYN
EP
EN
TTL
NCID
LVDS/TTL
+
-
VD D
VD D
NERR
T.PAD
GND
INPUT INTERFACE
OverTemp.
1
OverCurrent
Low V(LDA)
RVDD
VDDA
iC-NZP
VDDL
&
1
-
REF
+
ECI
CIS
ECI
x280
CI
LDA
IMON
MD
OUTPUT DRIVER
Bandgap, Reference, Overtemp
OUTPUT MONITOR
RGND
CVDDA
100 nF..
..10 nF..
CI
..300mA
RMD
PMD
Figure 7: Example set-up for current control
SLEEP MODE
The iC-NZP has a very low consuption mode that per-
mits hibernation in battery powered applications. Set-
ting the NSLP pin to low drives the chip into a state
where the VDDA pin is disconnected as supply and
pulled down. The wake up from sleep time is about
300 µs