IndustrialDriveDataDrive Board & Diagnostic Database
Functional board area

Emerson TD900 Gate-Drive Stage

Controls IGBT switching and turn-off behavior through the driver and discharge path.

Record status

IdentifierBoard part number not yet confirmed
Record typeFunctional board area

Observed functional elements

3120 driver stageM5C/P5C diode observationGate resistor/capacitor network

Diagnostic use

  • Investigate module-repeat failures
  • Investigate no-output after module replacement
  • Verify turn-off discharge path

Linked circuit records

Circuit
Emerson TD900 IGBT Turn-Off Drive Stage

A documented TD900 gate-drive observation shows a 3120 driver arrangement using a diode/resistor/capacitor network to improve IGBT turn-off charge removal where no negative gate supply is used.

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