Temperature Output Function - Mitsubishi Electric PSS**S72FT Manual

<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
2.2.3 Temperature output function V
(1) Usage of this function
This function measures the temperature of control LVIC by built in temperature sensor on LVIC.
The heat generated at IGBT and FWDi transfers to LVIC through molding resin of package and outer heat sink.
So LVIC temperature cannot respond to rapid temperature rise of those power chips effectively. (e.g. motor
lock, short circuit) It is recommended to use this function for protecting from slow excessive temperature rise
by such cooling system down and continuance of overload operation. （Replacement from the thermistor
which was mounted on outer heat sink currently）
[Note]
In this function, DIPIPM cannot shutdown IGBT and output fault signal by itself when temperature rises
excessively. When temperature exceeds the defined protection level, controller (MCU) should stop the DIPIPM.
←LVIC
(Detecting point)
Power Chip Area
Fig.2-2-6 Temperature detecting point
(2) V characteristics
OT
V output circuit, which is described in Fig.2-2-9, is the output of OP amplifier circuit. The current capability
OT
of V output is described as Table 2-2-6. The characteristics of V
OT
characteristics described in Fig.2-2-13. There are some cautions for using this function as below.
Table 2-2-6 Output capability
(Tc=-20°C ~100°C)
Source
Sink
Source: Current flow from V
Sink : Current flow from outside to V
 In the case of detecting lower temperature than room temperature
It is recommended to insert 5.1kΩ pull down resistor for getting linear output characteristics at lower
temperature than room temperature. When the pull down resistor is inserted between V
GND), the extra current calculated by V
continuously. In the case of only using V
necessary to insert the pull down resistor.
Fig.2-2-9 V
Publication Date: September 2015
OT
min.
1.7mA
0.1mA
to outside.
OT
.
OT
output voltage / pull down resistance flows as LVIC circuit current
OT
OT
Temperature
signal
Ref
output circuit in the case of detecting low temperature
OT
FWDi
Fig.2-2-7 Thermal conducting from power chips
OT
Temperature
signal
Ref
for detecting higher temperature than room temperature, it isn't
Inside LVIC
of DIPIPM
V
OT
V
NC
15
IGBT
LVIC
Temperature of
LIVC is affected
Heatsink
from heatsink.
output vs. LVIC temperature is linear
Inside LVIC
of DIPIPM
V
OT
V
NC
Fig.2-2-8 V output circuit
OT
and V
OT
MCU
5.1kΩ
5V
MCU
(control
NC