Consideration of Oscillation Dilemma from Dual 3.3 kV and 6.5 kV High Voltage Common Package

Inhalt:
Considerations of Self Excited Oscillation (SE-Osc) and Plasma Extraction Transit Time Oscillation (PETT-Osc) and influences between the upper and lower arms of an industrial standard 100x140mm dual package are presented. To suppress SE-Osc, the combination of inductances shared between a pair of internal devices, which have an amplitude ratio suggesting an unstable solution derived through simulation, were surveyed. Although the resonant loop inductance ranges to suppress PETT-Osc conflict between 3.3 kV and 6.5 kV modules, countermeasures to suppress SE-Osc and PETT-Osc together are indicated by an optimum relation of the internal inductances for each module.