iC-NZ
FAIL-SAFE LASER DIODE DRIVER
Rev B2, Page 18/20
ing RLDA. iC-HK is a fast, spike-free laser switch with L, M, H) on iC-NZ must be connected to the CI inputs
which up to 1.4 A can be driven in pulsed operation. of the relevant iC-HK and iC-NZ inputs LENx to iC-HK
An iC-HK can be connected to each channel on iC-NZ inputs EN1 and EN2 (Figure 16). Individual levels are
so that a maximum laser pulse current of 4.2 A can set as described above in Switching up to three laser
be achieved (depending on pulse frequency, duty cy- power levels.
cle and thermal dissipation). To this end pins CIx (x:
VDD
Q1
RLDA
LENL
LENM
LENH
R1
CLDA
LENM
REGEN LENL
LENH
SDIS
RVDD
LDA
MD
LD
LDKH
LDKM
VDD
LDK
LDKL
CIH
CIH
CI
VDD
RSI
EN1
EN2
VDD
LDK
iC−HK
Safety
Monitor
Diode
AGND1
AGND2
GND
CIM
CIM
CI
LENH
VDD
EN1
EN2
LDK
iC−HK
EN
AGND1
AGND2
GND
CIL
CIL
CI
LENM
EN1
EN2
LENL
iC−HK
SMD
LENL
AGND1
AGND2
iC−NZ
GND
MDL
RMDM
RSMD
RMM
RMDH
RGND
RMH
AGND
GND
RML
CREF
Figure 16: Extending the laser current
ICHAUS [ IC-HAUS GMBH ]
