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BSP742RI датащи(PDF) 9 Page - Infineon Technologies AG

номер детали BSP742RI
подробное описание детали  Smart Power High-Side-Switch
PDF  17 Pages
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производитель  INFINEON [Infineon Technologies AG]
домашняя страница  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

BSP742RI датащи(HTML) 9 Page - Infineon Technologies AG

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2004-03-16
Page 9
BSP 742 RI
Open-load detection
OFF-state diagnostic condition:
VOUT > 3V typ.; IN=low
Vbb disconnect with charged inductive
load
PROFET
V
IN
ST
OUT
GND
bb
V
bb
high
Open load
detection
Logic
unit
V
OUT
Signal GND
I L(OL)
OFF
GND disconnect
PROFET
V
IN
ST
OUT
GND
bb
V
bb
V
IN VST
V
GND
Inductive Load switch-off energy
dissipation
PROFET
V
IN
ST
OUT
GND
bb
=
E
E
E
EAS
bb
L
R
ELoad
RL
L
{
L
Z
GND disconnect with GND pull up
PROFET
V
IN
ST
OUT
GND
bb
V
bb
V
GND
V
IN
V
ST
Energy stored in load inductance: EL = ½ * L * IL2
While demagnetizing load inductance,
the enérgy dissipated in PROFET is
EAS = Ebb + EL - ER = VON(CL) * iL(t) dt,
with an approximate solution for RL > 0Ω:
E
IL
R
VV
IR
V
AS
L
L
bb
O U T C L
LL
OUT C L
=+
+
*
*
*(
|
) * ln (
*
||
)
()|
()
2
1



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