Choosing IGBT

[salah_edu]

Hi all, I want to use an igbt for 60A 160khz and 300v , is the ghtg30n60a4d useful for me. Datasheet is attached

 

[FvM]

Don't think that the linked IGBT is an active Onsemi part, although it's still stocked at catalog distributors.

I would rather go for a recent hight speed IGBT, e.g. https://www.onsemi.com/download/data-sheet/pdf/fgh40n60smd_f085-d.pdf

Although slightly higher rated for frequency operation, it still won't achieve 60A, 160 kHz, 300V.

 

[D.A.(Tony)Stewart]

• >100 kHz Operation 390 V, 30 A
• 200 kHz Operation 390 V, 18 A
• 600 V Switching SOA Capability
• Typical Fall Time 60 ns at TJ = 125°C

600V 60A is rated for a low duty cycle , not steady switching at 160 kHz Each transition adds a certain mJ of heat and the frequency accumulates this heat over the time constant of the heatsink and results in a temperature rise that may exceed your expectations.

Stock: https://www.digipart.com/part/HGTG30N60A4D

Does Figure 3. make sense?

You start with Design Specs for load impedance and power, then target efficiency losses and then design and choose components with a reasonable safety margin for a good MTBF.

Good design tools and the best parts may be found here.

Design Support | Semiconductors & Devices | Mitsubishi Electric

Design support pages provide information that will facilitate your product development, such as catalogs and application notes.

www.mitsubishielectric.com

 

[Easy peasy]

I agree with: " it still won't achieve 60A, 160 kHz, 300V." from FvM

you need to look at 600/650V SiC for 160kHz, 60A

although Si mosfets could serve too with sufficient gate drive ...

 

[salah_edu]

thank you,
if i reduce the switching frequency to 50khz , is it possible to use the hgtg30n60a4d for 50a 50% duty cycle and 300VDC, i increased the switching frequency because my transformer saturates at low frequency and dont know why.

 

[FvM]

i increased the switching frequency because my transformer saturates at low frequency and dont know why.

I think you should spend the time to calculate transformer parameters accurately before selecting switching frequency.

 

[Easy peasy]

" if i reduce the switching frequency to 50khz ... can it do 50A and 300VDC ...? "

if you read the data sheet - the max turn off energy ( worst case ) + turn on energy for 30A and 390V is 1200uJ + 750uJ = 1950uJ x 50kHz = 97.5 watts - and this is with zero conduction losses ...

Still completely untenable for a TO-247 ....

--- Updated Oct 30, 2022 ---

looking at ll the conditions - At 50A you will be closer to 110W per device just for sw losses ....