Resistor choice for bldc card

[jmx66]

Hi all,

I only want to know, right power value for gate resistor of igbt module.

igbt module : infineon FS50R12W2T4 from datasheet rg on about 15 Ohm.

MEA1D1509SC pin 6 Vcc 9V
pin 4 Vee -9V

From p5 FOD3120 datasheet

Ioh High level output current Vo = Vcc - 3V so 6v -- 9V = 15V
Vo = Vcc - 6V so 3V -- 9V = 12 V

I is about 2A but for Vcc=30 V with 18V how to compute right values?


Iol Low level output current Vo = Vee + 3 V = - 6 V so -6 -- 9V = 3 V
Vo = Vee + 6 V = - 3 V so -3 -- 9V = 6 v


I]I is about 2A but for Vcc=30 V[/I] with 18 V how to compute right values?


Idem if i watch, p7 FOD3120 datasheet:

Fig 5 Output low voltage / output low current

1° Vcc = 15 > 30 V

I'd like to know maths, for R1 and R3 power values.


Thanks a lot.

jm