參數(shù)資料
型號: BTS452-R
英文描述: ?200mΩ. 6-52V 1.8A. P-TO-252-5
中文描述: ?200mΩ。 6 - 52V的1.8A。的P -給- 252 - 5
文件頁數(shù): 9/17頁
文件大?。?/td> 166K
代理商: BTS452-R
2000-02-22
Page 9
BTS 452 R
Open-load detection
OFF-state diagnostic condition:
V
OUT
> 3V typ.; IN=low
Vbb disconnect with charged inductive
load
PROFET
V
IN
ST
OUT
GND
bb
Vbb
high
Open load
detection
Logic
unit
VOUT
Signal GND
REXT
RO
OFF
GND disconnect
PROFET
V
IN
ST
OUT
GND
bb
Vbb
VINVST
VGND
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
Vbb
VGND
VINVST
Energy stored in load inductance: E
L
= * L * I
L2
While demagnetizing load inductance,
the enérgy dissipated in PROFET is
E
AS
= E
bb
+ E
L
- E
R
=
ò
V
ON(CL)
* i
L
(t) dt,
with an approximate solution for R
L
> 0
W
:
E
I
2
L
R
V
V
I
R
V
AS
L
L
bb
OUT CL
L
L
OUT CL
=
+
+
*
*
* (
|
)* ln(
*
|
|)
)|
(
)
1
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