HITFET - BTS3080TF
Smart Low-Side Power Switch
Power Stage
5.3.1.1 Maximum Load Inductance
While demagnetization of inductive loads, energy has to be dissipated by the BTS3080TF.
This energy can be calculated by the following equation:
⎡
⎢
⎤
⎥
⎛
⎜
⎝
⎞
⎟
⎟
⎠
VBAT −VOUT(CLAMP)
RL × IL
VBAT −VOUT(CLAMP)
L
⎜
E =VOUT(CLAMP)
×
×ln 1−
+ IL
×
(5.1)
(5.2)
RL
RL
⎢
⎣
⎥
⎦
Following equation simplifies under the assumption of RL = 0
⎛
⎜
⎞
⎟
⎟
⎠
1
VBAT
2
⎜
E = LIL × 1−
2
VBAT −VOUT(CLAMP)
⎝
For maximum single avalanche energy please also refer to EAS value in “Energies” on Page 6.
1000
100
10
1
0,1
1
10
IL [A]
Figure 13
Maximum load inductance for single pulse
L = f(IL), TJ(0) = TJ, start = 150°C, VBAT = 13.5 V
5.4
Reverse Current capability
A reverse battery situation means the OUT pin is pulled below GND potentials to -VBAT via the load ZL.
Datasheet
13
Rev. 1.0
2016-06-01
INFINEON [ Infineon ]
