<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
Publication Date: September 2015
16
In the case of using with low voltage controller(MCU)
In the case of using V
OT
with low voltage controller (e.g. 3.3V MCU), V
OT
output might exceed control supply
voltage 3.3V when temperature rises excessively. If system uses low voltage controller, it is recommended to
insert a clamp Di between control supply of the controller and this output for preventing over voltage.
Fig.2-2-10 V
OT
output circuit in the case of using with low voltage controller
In the case that the protection level exceeds control supply of the controller
In the case of using low voltage controller like 3.3V MCU, if it is necessary to set the trip V
OT
level to control
supply voltage (e.g. 3.3V) or more, there is the method of dividing the V
OT
output by resistance voltage divider
circuit and then inputting to A/D converter on MCU (Fig.2-2-11). In that case, sum of the resistances of divider
circuit should be almost 5.1k
Ω
. About the necessity of clamp diode, we consider that the divided output will not
exceed the supply voltage of controller generally, so it will be unnecessary to insert the clump diode. But it
should be judged by the divided output level finally.
Fig.2-2-11 V
OT
output circuit in the case with high protection level
Ref
V
OT
Temperature
signal
V
NC
Inside LVIC
of DIPIPM
MCU
Ref
V
OT
V
NC
MCU
R1
R2
DV
OT
DV
OT
=V
OT
·
R2/(R1+R2) R1+R2
≈
5.1k
Ω
Temperature
signal
Inside LVIC
of DIPIPM
