Datasheet
V
bb
disconnect with charged external
inductive load
352)(7
9
67
,6
287
*1'
EE
,1
287
9
EE
KLJK
'
5
/
/
If other external inductive loads L are connected to the PROFET,
additional elements like D are necessary.
Inductive Load switch-off energy
dissipation
352)(7
,1
67
287
*1'
9
EE
(
(
(
(
$6
EE
/
5
(
/RDG
,6
287
9
EE
Energy stored in load inductance:
E
L
=
1
/
2
·
L·I
2
L
While demagnetizing load inductance, the energy
dissipated in PROFET is
E
AS
= E
bb
+ E
L
- E
R
=
V
ON(CL)
·i
L
(t) dt,
with an approximate solution for R
L
> 0 Ω:
E
AS
=
I
L
·
L
2
·
R
L
·(
V
bb
+|V
OUT(CL)
|)
· OQ
(1+
I
L
·
R
L
|V
OUT(CL)
|
)
Data Sheet 10 V1.1, 2008-19-08
Smart High-Side Power Switch
BTS640S2G