High-voltage sampling: The high-voltage sampling circuit includes multiple high-voltage sampling resistors and isolation op amps. The high-voltage sampling resistors generally use 1206 or larger packages, and the isolation op amps are mainly Avago's C87A/BT.
Drive circuit: The drive circuit is to increase the drive signal carrying capacity of the drive signal output by the DSP through the isolation chip, drive the IGBT, and send the fault signal to the DSP. The isolation methods mainly include magnetic isolation, capacitive isolation and photoelectric isolation. We usually use magnetic isolation and capacitive isolation. The carrying capacity varies. Generally, a push-pull circuit is added later. Now there are also some chips with larger carrying capacity available.
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