Start-up procedure of EVAL_2500W_PFC_GaN_A

[PowerStarter_]

Hello,

I got the EVAL_2500W_PFC_GaN_A and in the start-up procedure is stated that the recommended way is to use an electronic load in constant current mode and a programmed sink current of 100mA.

Can be instead of the electronic load a load resistor be used with 3.9kOhm?

Best regards

[Guruprasad_A · Accepted solution]

Hi @PowerStarter_ 
Thank you for posting in the Infineon community.
Ideally, there should not be any problem. Make sure that the resistor's ratings are adequate.

Regards,
Guruprasad A

[PowerStarter_]

Thank you @Guruprasad_A .
The only benefit of using a programmed sink current is due to a more reliable start-up, right? Or is there another reason for it aswell?
Is a startup with another output current than 100mA possible as well? Meaning that the desired output load is already connected during start-up?

[Guruprasad_A]

Hi @PowerStarter_ ,

Test procedure describes how to use the hardware for lab evaluations and results are used as a guide. 100mA is the minimum load requirement.

After validating the results you can use this for your application.

Regards,

Guruprasad A

[PowerStarter_]

Ok. The minimum load requirement of 100mA is at full output voltage (390V) right? Because when a Resistor is used as a load the current at start-up would be less than the 100mA, when a static resistance of 3900kOhm is being used.

[Guruprasad_A]

Hi @PowerStarter_ ,

Your interpretation is accurate. Make sure the resistor you are using is of a sufficient value; it should meet the minimum load requirement.

Regards,

Guruprasad A