kappa_am
Full Member level 6
Hi,
I was looking into the schematic of one of Infineon's demonstration boards which can be found on the link below:
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d4626fc1ce0b016fd334217c2fc3
There are 3 ground levels, GND_Internal, GND_System, and GND_shifted. A gate driver with an internal charging pump is used to fire the switch.
I can understand GND-internal and GND-system. But I cannot understand why they have separated the control system's ground from the battery negative! Supposedly, control ground and battery negative are at the same level, and in the schematic, they are "connected" using either a diode or PNP transistor. I appreciate it if you share your opinion.
Thank you
I was looking into the schematic of one of Infineon's demonstration boards which can be found on the link below:
https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d4626fc1ce0b016fd334217c2fc3
There are 3 ground levels, GND_Internal, GND_System, and GND_shifted. A gate driver with an internal charging pump is used to fire the switch.
I can understand GND-internal and GND-system. But I cannot understand why they have separated the control system's ground from the battery negative! Supposedly, control ground and battery negative are at the same level, and in the schematic, they are "connected" using either a diode or PNP transistor. I appreciate it if you share your opinion.
Thank you