BTS734L1 データシートの表示（PDF） - Infineon Technologies
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BTS734L1 Datasheet PDF : 16 Pages
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Inductive load switch-off energy
dissipation
E bb
E AS
IN
Vbb
ELoad
PROFET OUT
=
ST
GND
L
{Z L
EL
ER
RL
Energy stored in load inductance:
EL
=
1/2·L·I
2
L
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)|
)
Maximum allowable load inductance for
a single switch off (one channel)5)
L = f (IL ); Tj,start = 150°C, Vbb = 12 V, RL = 0 Ω
L [mH]
1000
100
10
1
3 4 5 6 7 8 9 10 11 12 13 14
IL [A]
Semiconductor Group
10
BTS 734 L1
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