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BM63375S-VA Datasheet(PDF) 17 Page - Rohm

Part No. BM63375S-VA
Description  600V IGBT Intelligent Power Module (IPM)
Download  24 Pages
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Maker  ROHM [Rohm]
Homepage  http://www.rohm.com
Logo ROHM - Rohm

BM63375S-VA Datasheet(HTML) 17 Page - Rohm

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© 2020 ROHM Co., Ltd. All rights reserved.
30.Jul.2020 Rev.001
Operational Notes
Reverse Connection of Power Supply
Connecting the power supply in reverse polarity can damage the IPM. Take precautions against reverse polarity when
connecting the power supply, such as mounting an external diode between the power supply and the IPM
’s power
supply pins.
Power Supply Lines
Design the PCB layout pattern to provide low impedance supply lines. Separate the ground and supply lines of the
digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog
block. Furthermore, connect a capacitor to ground at all power supply pins. Consider the effect of temperature and
aging on the capacitance value when using electrolytic capacitors.
Ground Voltage
Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition. However,
pins that drive inductive loads (e.g. motor driver outputs, DC-DC converter outputs) may inevitably go below ground
due to back EMF or electromotive force. In such cases, the user should make sure that such voltages going below
ground will not cause the IPM and the system to malfunction by examining carefully all relevant factors and conditions
such as motor characteristics, supply voltage, operating frequency and PCB wiring to name a few.
Ground Wiring Pattern
When using both small-signal and large-current ground traces, the two ground traces should be routed separately but
connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal
ground caused by large currents. Also ensure that the ground traces of external components do not cause variations
on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance.
Thermal Consideration
Should by any chance the maximum junction temperature rating be exceeded the rise in temperature of the chip may
result in deterioration of the properties of the chip.
Recommended Operating Conditions
These conditions represent a range within which the expected characteristics of the IPM can be approximately
obtained. The electrical characteristics are guaranteed under the conditions of each parameter.
Inrush Current
When power is first supplied to the IPM, it is possible that the internal logic may be unstable and inrush current may
flow instantaneously due to the internal powering sequence and delays, especially if the IPM has more than one
power supply. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground
wiring, and routing of connections.
Testing on Application Boards
When testing the IPM on an application board, connecting a capacitor directly to a low-impedance output pin may
subject the IPM to stress. Always discharge capacitors completely after each process or step. The IPM
’s power supply
should always be turned off completely before connecting or removing it from the test setup during the inspection
process. To prevent damage from static discharge, ground the IPM during assembly and use similar precautions
during transport and storage.
Inter-pin Short and Mounting Errors
Ensure that the direction and position are correct when mounting the IPM on the PCB. Incorrect mounting may result
in damaging the IPM. Avoid nearby pins being shorted to each other especially to ground, power supply and output
pin. Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment)
and unintentional solder bridge deposited in between pins during assembly to name a few.
Unused Input Pins
Input pins of an IPM are often connected to the gate of a MOS transistor. The gate has extremely high impedance and
extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small
charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and
cause unexpected operation of the IPM. So unless otherwise specified, unused input pins should be connected to the
power supply or ground line.
Area of Safe Operation (ASO)
Operate the IPM such that the output voltage, output current, and power dissipation are all within the Area of Safe
Operation (ASO).

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