5SHX2645L0004 3BHL000389P0104 3BHB003154R0101 5SXE04-0150 GVC707AE01 High Voltage Accessories

Operating Junction Temperature (Tvj):

• Definition:
  • Tvj is the operating junction temperature of the IGCT, representing the temperature of the semiconductor junction during operation.
• Lower Limit:
  • The lower limit of Tvj is determined by turn-on and turn-off characteristics. Extremely low temperatures may increase latching current, hindering device turn-on, and reduce turn-off capability.
• Upper Limit:
  • The upper limit is determined by the blocking capability of the main pn junction. Leakage current rises exponentially with temperature, and thermal instabilities may arise at high voltage.

Storage Temperature (Tstg):

• Definition:
  • Tstg is the storage temperature range for short-term events.
• Recommendation:
  • Recommended storage at a stable temperature of 20°C ± 10°C with relative humidity below 55% to maximize storage lifetime.

Operating Ambient Temperature (Ta):

• Definition:
  • Ta is the operating ambient temperature around the gate-unit components, including the electrolytic capacitors.
• Effects on ITGQM:
  • Temperatures below Ta min reduce ITGQM due to increased gate unit impedance.
• Ambient Temperature Limits:
  • Ta max is the ambient temperature where aging of the gate unit becomes significant. For a 20-year lifetime, limit the case temperature of electrolytic capacitors to 60°C.
• Effect of Cooling on Turn-Off Current:
  • Fig. 5 shows the effect of light forced air-cooling on allowable turn-off current as a function of switching frequency.
• Considerations for Different Conditions:
  • When Ta, Tcase GCT, or cooling conditions differ significantly from the datasheet, measuring the case temperature of electrolytic capacitors is recommended.

Power Supply Capability of Gate Unit:

• PGIN Max:
  • The curve PGIN Max illustrates the power supply capability of the gate unit. Understanding this curve is crucial to ensure proper gate unit operation within specified temperature limits.

Careful consideration of Tvj, Tstg, and Ta is essential for reliable IGCT operation. Monitoring temperature limits and adjusting cooling conditions accordingly is crucial, especially in cases where operating conditions deviate from the standard datasheet values.