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UC846的GND接冷地，正激变压器的主NMOS管的源极应接热地还是冷地？

jiahu Hang
Prodigy 70 points
Other Parts Discussed in Thread: UC3846

UC3846的工作电压接15V的开关电源（UC846的GND接冷地）， 其Pin11和Pin14输出脉冲信号驱动正激变压器的主NMOS管。此时正激变压器的输入电压为310V，请问正激变压器的主NMOS管的源极应接热地还是冷地？