IC-NZ Datasheet, PDF (14/20 Pages) IC-Haus GmbH – FAIL-SAFE LASER DIODE DRIVER

iC-NZ
FAIL-SAFE LASER DIODE DRIVER
Safety
Monitor
Diode
VDD
C1
VDD
RSI
RSI
EN
Current Monitor
Safety Monitor Diode
RSMD
SMD
RGND
VSAH
VSAL
+
SMD(1)
−
+
SMD(0)
−
SDIS
VDD
REGEN
LENL
LENM
LENH
NSEN
Finite State Machine
S1
NSEN
LDAOK
NTREN
VREF
+
MDL
−
Laser Driver
APC
MDOK
MDL
Monitor
VREF
+
−
RVDD
LDA
CLDA
RMDH
LDKH
RMH
CIH
CIH
LDKM
CIM
VREF
+
−
GND
CREF
LDKL
CIL
CIL
MDL
AGND
Rev B2, Page 14/20
LD MD
RML
Figure 10: Two-channel operation with safety function (N-type laser diode)
VDD
VDD
C1
RSI
RSI
EN
Current Monitor
SMD
Safety Monitor Diode
RSMD
SMD
RGND
VSAH
VSAL
+
SMD(1)
−
+
SMD(0)
−
SDIS
VDD
REGEN
LENL LENM
LENH
NSEN
Finite State Machine
S1
NSEN
LDAOK
NTREN
VREF
+
MDL
−
Laser Driver
APC
MDOK
MDL
Monitor
VREF
+
−
RVDD
LDA
CLDA
MDL
RMDM
RMDH
RMH
LDKH
CIH
CIH
LDKL
CIM
VREF
+
−
LDKL
CIL
CIL
AGND
GND
CREF
RML
LD MD
Figure 11: Two-channel operation with safety function (P-type laser diode)