Datasheet

PROFET
®
BTS 443 P
Data Sheet Page 10 of 15 Rev. 1.0, 2007-02
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 1b: typical behaviour of sense output:
I
L(lim) = 20A
I
S
I
L
I
IS,fault >= 2.5mA
Figure 2a: Switching motors and lamps:
I
IN
t
V
OUT
I
IL
I
IS
Sense current above I
IS,fault
can occur at very high
inrush currents.
Figure 2b: Switching an inductive load:
I
IN
t
V
OUT
I
L
I
IS