Datasheet

Smart High-Side Power Switch
BTS50080-1TEA
Diagnosis
Datasheet 22 Rev. 1.0, 2008-08-28
Figure 18 Current sense ratio
k
ILIS
1)
Details about timings between the diagnosis signal I
IS
, the forward voltage drop V
ON
and the load current I
L
in ON-
state can be found in Figure 19.
Note: During operation at low load current and at activated forward voltage drop limitation the “two level control”
of
V
ON(NL)
can cause a sense current ripple synchronous to the “two level control” of V
ON(NL)
. The ripple
frequency increases at reduced load currents.
Figure 19 Timing of Diagnosis Signal in ON-state
1) The curves show the behavior based on characterization data. The marked points are guaranteed in this Datasheet in
Section 7.1 (Position 7.1.1).
0
5000
10000
15000
20000
25000
0 5 10 15 20 25 30
max.
typ.
min.
A
k
ILIS
I
L
SwitchOn.emf
V
ON
I
IN
tV
ON
<1V typ.
I
L1
I
L2
I
IS1
I
IS2
t
son(IS)
t
slc(IS)
I
L
I
IS
0.9*I
IS1
I
IS(fault )
V
ON
>1V typ.
I
IS(lim)
I
IS(LL)
t
t
t
I
IN
V
ON
tV
ON
>V
ON(SC)
over-temperature
I
Lx(SC)
t
delay(fault)
I
L
I
IS
I
IS(fault)
t
t
t
I
L
V
ON
<1V typ.
I
IS(fault )
shortnormal operation