BTS307 查看數據表（PDF） - Siemens AG
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BTS307 Datasheet PDF : 13 Pages
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Vbb disconnect with charged external
inductive load
S
3
high
IN
Vbb
2
PROFET
OUT
5
D
ST
4
GND
1
Vbb
If other external inductive loads L are connected to the PROFET,
additional elements like D are necessary.
BTS 307
Inductive Load switch-off energy
dissipation
E bb
IN
Vbb
E AS
ELoad
PROFET OUT
=
ST
EL
GND
L
{Z L RL
ER
Energy stored in load inductance:
EL = 1/2·L·I2L
While demagnetizing load inductance, the energy
dissipated in PROFET is
∫ EAS= Ebb + EL - ER= VON(CL)·iL(t) dt,
with an approximate solution for RL > 0 Ω:
EAS=
2IL·R· LL·(Vbb
+
|VOUT(CL)|)·
ln
(1+
IL·RL
|VOUT(CL)|
)
Semiconductor Group
8
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