iC-NZ
FAIL-SAFE LASER DIODE DRIVER
Rev B2, Page 6/20
ELECTRICAL CHARACTERISTICS
Operating Conditions: VDD = 3.5...5.5 V, Tj = -20...85 °C; x: L, M, H, unless otherwise stated
Item Symbol
No.
Parameter
Conditions
Unit
Min.
100
0.25
10
Typ.
Max.
407 C(CIx)
408 |I(CIx)|
409 I(CIx)
Capacitance at CIx
nF
mA
mA
nA
Charge Current from CIx
Discharge Current in CIx
Pull-Down Current in CIx
iC active, control unit not yet settled
iC inactive, V(CIx) > 1 V
0.6
1
60
410 Ipd(CIx)
iC active, REGEN = lo
25
150
411
I(RMDx)
Permissible
Laser Monitor Diode Current
active safety function;
VDD = 5 V
2.5
1
mA
mA
VDD = 3.3 V
Status Outputs
501 I(NERR)
502 I(NERR)
Current at Error Message
Current in NERR
V(LDA) = V(VDD) = V(NERR), error state
1.5
0.1
10
1
mA
mA
V(LDA) = V(VDD) = V(NERR),
no error state, V(MDL) < 0.5 V
503 I(NSF)
504 I(SDIS)
505 Vsat()
Current at NSF Message
Current at SDIS Message
V(LDA) = V(VDD) = V(NSF), V(NSF) > 0.8 V
V(LDA) = V(VDD) = V(SDIS), V(SDIS) > 0.8 V
Isat = 1 mA, NERR in error state
1.5
1.0
10
10
mA
mA
mV
Saturation Voltage at NERR,
NSF, SDIS
600
Current Monitor RSI, LDA
601 V(RSI)
602 RSI
Controlled Voltage at RSI
EN = hi
430
0.78
440
490
490
560
9
mV
kΩ
Resistor at RSI
603 VLDA
LDAOK Monitor Threshold
VDD – V(LDA)
550
mV
604 Idc(LDA)
Current from LDA
DC
320
1
mA
kΩ
µs
605 Rpd(LDA) Pull-Down Resistor at LDA
Reset
606 td(SDIS)
607 rILDA
608 Ipd(RSI)
Timing
Overcurrent Shutdown Delay
I(LDA) > I(RSI) * 500
10
Current Ratio I(LDA)max / I(RSI) 780 Ω < RSI < 9000 Ω
400
1
500
650
10
Pull-Down Current in RSI
V(RSI) > 0.5 V
µA
µs
701 ten
Propagation Time: EN lo → hi
no error at self test, CLDA = 1 µF
300
system enable
702 tr
703 tf
Laser Current Rise Time
Laser Current Fall Time
see Fig. 2
see Fig. 2
see Fig. 3
1.5
1.5
10
ns
ns
ns
704 tplh
Propagation Time:
LENx lo → hi to Current lo → hi
705 tphl
Propagation Time:
see Fig. 3
see Fig. 4
10
ns
LENx hi → lo to Current hi → lo
Propagation Time:
706
ts0
V(SMD) > VSL to SMD(0) lo → hi Tj = 27 °C
220
240
ns
ns
Tj = 85 °C
707 ts0off
708 ts1
709 toff
710 td
Propagation Time:
V(SMD) < VSL to SMD(0) hi → lo
Propagation Time:
V(SMD) > VSH to SMD(1) lo → hi
Propagation Time:
SMD(1) lo → hi until shutdown
Propagation Time:
SMD(1) lo → hi until error
message
220
220
10
ns
ns
ns
ns
see Fig. 4
see Fig. 4
see Fig. 4
500
ICHAUS [ IC-HAUS GMBH ]
