IC-NZ Datasheet, PDF (19/20 Pages) IC-Haus GmbH – FAIL-SAFE LASER DIODE DRIVER

iC-NZ
FAIL-SAFE LASER DIODE DRIVER
Rev B2, Page 19/20
Driving blue laser diodes
It is also possible to drive blue laser diodes with iC-
NZ. The laser diode is then directly powered by a
second, higher voltage. The laser power is set as de-
scribed above in Switching up to three laser power lev-
els. Figure 17 shows iC-NZ connected up to a blue
laser diode. It is important to note that here the laser
diode supply voltage should be as low as possible to
keep iC power dissipation to a minimum.
5..12 V
VDD
Safety
Monitor
Diode
RSMD
VDD
RSI
EN
Current Monitor
Safety Monitor Diode
SMD
RGND
VSAH
+ SMD(1)
−
+ SMD(0)
−
VSAL
iC−NZ
SDIS
VDD
REGEN
LENL LENM LENH
S1
NSEN
Finite State Machine
NSEN
LDAOK
NTREN
VREF
+
MDL
−
Laser Driver
APC
MDL
MDOK
Monitor
VREF
+
−
CLDA
RVDD
LDA
RMDM
RMDH
RMM
RMH
LDKH
CIH
CIH
LDKM
CIM
CIM
VREF
+
−
GND
CREF
LDKL
CIL
CIL
MDL
AGND
LD
MD
RML
Figure 17: Driving blue laser diodes
DEMO BOARD
The iC-NZ device is equipped with a Demo Board for
test purposes. A description of the demo board is
available as a separate document.
This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained herein,
design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the current data.
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areas of applications of the product.
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