IC-NZ Datasheet, PDF (13/20 Pages) IC-Haus GmbH – FAIL-SAFE LASER DIODE DRIVER

iC-NZ
FAIL-SAFE LASER DIODE DRIVER
Rev B2, Page 13/20
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
+
−
VREF
+
−
GND
VREF
CREF
RVDD
LDA
LDKH
RMDH
CIH
CIH
RMDM
LDKM
CIM
LDKL
CIL
MDL
AGND
LD MD
RML
Figure 8: One-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
+
−
VREF
+
−
RVDD
LDA
MDL
RMDM
RMDH
CLDA
LDKH
CIH
CIH
LDKM
CIM
LDKL
CIL
GND
CREF
AGND
RMDH
LD MD
Figure 9: One-channel operation with safety function (P-type laser diode)