AK2572 Datasheet, PDF (33/50 Pages) Asahi Kasei Microsystems – APC for Burst Mode Applicable Direct Modulation Laser Diode

ASAHI KASEI
[AK2572]
8.5 At TXFAULT Detection / Release
TXFAULT detection / release sequences are shown in Figure 8-5 and Figure 8-6.
Figure 8-5 TXFAULT Detection / Release Sequence (When FAULT is released by TXDIS reset)
VDD
TXDIS
FAULT
TXFAULT
t_reset: 10μs [Min.]
2ms
TXFAULT with OPTALM enable
[Typ.] (When to set accelerated start-up sequence)
LD Current
Depend on the detcted ALM
(Refer to Table 6-1)
t_init: 160ms[Typ.]
TX_FAULT enable TXFAULT with
without OPTALM OPTALM enable
Figure 8-6 TXFAULT Detection / Release Sequence (When FAULT is not released)
VDD
TXDIS
FAULT
TXFAULT
t_reset: 10μs[Min.]
LD Current
t_fault
Depend on the detcted ALM
(Refer to Table 6-1)
TXFAULT detection with OPTALM
When to set accelerated start-up sequence: 2ms [Typ.]
When not to set accelerated start-up sequence: 160ms [Typ.]
TXFAULT detection with EXTALM1,2
2ms [Typ] or 0ms (Set by RE_TIMER_EXTALM1,2)
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< MS0290-E-01>
2004/8