Hi Sir,
For our single phase inverter design we want to use DRV8705 gate driver IC with NPH2R608 NH (NMOSFET). Qg = 27nC.
According to our calculations it seems that we may be able to meet the requirements. I did the calculations as the TI document suggest. If any of you can varify the calculations or give experimental feedback it will be very helpful to us.
Thanks in advance.
Nayeem
Calculations:
Our target —- TPH2R608NH
Qg = 72nC
Ivcp = 1.44mA
Idrivep_HI = 18nC/750nsec = 24mA (1010b = 24 mA)
Idrivep_lo = 18nC/1000ns = 18mA (1001b = 20 mA)
Based on the calculations a value of 24mA was chosen for Idrivep;
Idriven_Hi = 18nC/250ns = 72mA (1111b = 62 mA)
Idriven_lo = 18nC/500ns = 36mA (1101b = 40 mA)
Based on the calculations a value of 62 mA was chosen for Idriven;
