BTF50060-1TEA_11 Datasheet, PDF (21/38 Pages) Infineon Technologies AG – Smart High-Side Power Switch, One Channel

BTF50060-1TEA
Functional Description
VIN
t_RESET
t
IL
I_IS
90% (I_{IS static} - I_IS(OFFSET))
10% (I_{IS static} - I_IS(OFFSET))
t_sIS(ON)
Figure 21 Sense output timing
t_{sIS (OFF)}
t_sIS(LC)
t_{sIS (LC)}
t
I_{IS (OFFSET)}
t
CurrentSenseTiming .emf
Figure 22 shows the current sense as a function of the load current in the power DMOS. The curves represent
the minimum and maximum values for the sense current, as well as the ideal sense current, assuming an ideal k_IS
factor value as well as an ideal I_IS(OFFSET).
10
max I _IS(fault)
8
typ I _IS(fault)
min I _IS(fault)
6
max I _IS
4
typ I _IS
min I _IS
2
max I _L(SC)
typ I _L(SC)
min I _L(SC)
0
0
20
40
60
80 100
I _L [A]
PD[ , _,6
W\S , _,6
PLQ , _,6
PD[ , _{,6 2))6(7}
W\S , _{,6 2))6(7}
PLQ , _{,6 2))6(7}
, _/ >$@
Figure 22 Sense current as a function of the load current (V_SIS > 3V)
The sense current can be calculated out of the load current by the following Equation (4):
I_IS
=
-1-
k_IS
×
I_L
+
I_IS(OFFSET)
(4)
Or, vice versa, the load current can be calculated out of the sense current by following Equation (5):
I_L = k_IS × (I_IS – I_IS(OFFSET))
(5)
Datasheet
Speed PROFET^TM
21
Rev. 1.2, 2011-09-01