Data Sheet BTS555
Infineon Technologies AG 14 2008-June-24
Timing diagrams
Figure 1a: Switching a resistive load,
change of load current in on-condition:
I
IN
t
V
OUT
I
L
I
IS
t
son(IS)
tt
slc(IS)
Load 1
Load 2
soff(IS)
t
t
t
on
off
slc(IS)
90%
dV/dton
dV/dtoff
10%
The sense signal is not valid during a settling time
after turn-on/off and after change of load current.
Figure 2a: Switching motors and lamps:
I
IN
t
V
OUT
I
IL
I
IS
Sense current saturation can occur at very high
inrush currents (see I
IS,lim
on page 6).
Figure 2b: Switching an inductive load:
I
IN
t
V
OUT
I
L
I
IS
Figure 3a: Short circuit:
shut down by short circuit detection, reset by I
IN
= 0.
I
IN
I
L
I
L(SCp)
I
IS
t
t
d(SC)
V
OUT
=0
V
OUT
>>0
Shut down remains latched until next reset via input.
