<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
Publication Date: September 2015
45
4.2 Bootstrap Supply Circuit Current at Switching State
Bootstrap supply circuit current I
DB
at steady state is maximum 1.10mA. But at switching state, because gate
charge and discharge are repeated by switching, the circuit current exceeds 1.10mA and increases
proportional to carrier frequency. For reference, Fig.4-2-1~2 show typical I
DB
- carrier frequency fc
characteristics for PSSxxS72FT.
(Conditions: V
D
=V
DB
=15V, Tj=125°C at which I
DB
becomes larger, IGBT ON Duty=10, 30, 50, 70, 90%)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0
5
10
15
20
Ci
rc
u
it
c
u
rre
n
t [
m
A]
Carrier frequency [kHz]
Fig.4-2-1 I
DB
vs. Carrier frequency for PSS05S72FT
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0
5
10
15
20
Ci
rc
u
it
c
u
rre
n
t [
m
A]
Carrier frequency [kHz]
Fig.4-2-2 I
DB
vs. Carrier frequency for PSS10S72FT
