IC-NZ Datasheet, PDF (7/20 Pages) IC-Haus GmbH – FAIL-SAFE LASER DIODE DRIVER

iC-NZ
FAIL-SAFE LASER DIODE DRIVER
ELECTRICAL CHARACTERISTICS: DIAGRAMS
Rev B2, Page 7/20
V
VDD−0.45V
Vt()hi
Input/Output
Vt()lo
0.45V
t
1
0
Figure 1: Reference levels
I(LED)
t_r
t_f
I _pk
90% I _pk
10% I _pk
t
Figure 2: Laser current pulse
LENL
LENM
LENH
I(LDKL)
I(LDKM)
I(LDKH)
V(MDL)
t _plh
t _plh
t _plh
t _phl
t _phl
t _phl
Zeit
Figure 3: Turn on/turn off behavior of the laser current
ENCAL
LENL
LENM
LENH
P(Laser)
Ph
Pm
Pl
V(MDL)
0.5V
V(SMD)
VSH
VSL
SMD(0)
SMD(1)
NERR
NSEN
NTREN
Zeit
Zeit
t _S0
t _S1 t _d
t_off
Zeit
Figure 4: Safety shutdown times with failure of the control unit, for example