FET Turn-On and Turn-Off Characteristics
Following IEC 60407-8 for FETs, turn-on and turn-off characteristics are calculated as follows:
Turn-on Characteristics
| Parameter, | Description, | Corresponding section in IEC 60747-8 |
| Turn-on delay td(on), | Time between 10% VGS Þ 90% VDS, | 4.3.5 |
| Turn-on rise time tr, | Time between 90% VDS Þ 10% VDS, | 4.3.5 |
| Turn-on time ton, | ton = td(on) + tr, | 4.3.5 |
| Turn-on energy e(on,) | Integral of VDS x ID x dt (integration time 0-t1: 10% IP Þ VDS = 10%VDS), | 3.3.20 |
| di/dt (on), | Plot the derivative of the current between 10% and 90% of ID. Report the maximum., | Not addressed in the IEC standard |
| dv/dt (on), | Plot the derivative of the voltage between 90% and 10% of VDS. Report the maximum., | Not addressed in the IEC standard |
Turn-off Characteristics
| Parameter, | Description, | Corresponding section in IEC 60747-8 |
| Turn-off delay td(off,) | Time between 90% VGS Þ 10% VDS, | 4.3.5 |
| Turn-off fall time tf, | Time between 10% VDS Þ 90% VDS, | 4.3.5 |
| Turn-off time toff, | toff = td(off) + tr, | 4.3.5 |
| Turn-on energy e(off), | Integral of VDS x ID x dt (integration time 0-t1: 10% IP Þ VDS = 10%VDS), | 3.3.21 |
| di/dt (off), | Plot the derivative of the current between 90% and 10% of ID. Report the maximum., | Not addressed in the IEC standard |
| dv/dt (off), | Plot the derivative of the voltage between 10% and 90% of VDS. Report the maximum., | Not addressed in the IEC standard |