UCD3138A: Compensation design of half bridge LLC converter.

PP N

Part Number: UCD3138A
Other Parts Discussed in Thread: UCD3138

Hi,

I have a UCD3138ALLEVM150 evaluation board along with me. Also, I have gone through Fusion Digital Power Designer user guide.

I want to learn more about determination of compensation parameter for half bridge LLC converter for my custom hardware design.

Can you please help me with some related documentation with above required specific details for stable control compensator design.

Thanks.

over 2 years ago

0 Jacob Wang(SZ) over 2 years ago

TI__Intellectual 1510 points

Hi,

Please refer to chapter 4.2.9 of the document below.

https://www.ti.com/lit/an/slua676c/slua676c.pdf?ts=1698893498186&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FFUSION-DIGITAL-POWER-STUDIO%253FkeyMatch%253DFUSION%2BDIGITAL%2BPOWER%2BDESIGNER

Best Regards!

Jacob

0 PP N over 2 years ago in reply to Jacob Wang(SZ)

Prodigy 210 points

Hello,

Thank you for the reply, but I have gone through this document earlier.

Instead, can you please suggest a suitable document such as: https://www.ti.com/lit/an/slua709/slua709.pdf

(used for PFC compensation tuning in detail)

I want some documentation for tuning of compensator for a stable converter performance.

0 Sean Xu over 2 years ago in reply to PP N

TI__Genius 14580 points

Hello,

Yes, the application note is very handy. For LLC application, the loop tuning is not that complex. Because of this, we don't offer every application note for every EVM or topology.

The method is the same. Kp, Ki, Kd are used for tuning. If you have firmware, you can change Ki, Kp, Kd, and then measure Bode plot. I do have one application note called UCD3138 Control Theory. If you tell me your email box, I can forward it to you.

Regards,

Sean

0 PP N over 2 years ago in reply to Sean Xu

Prodigy 210 points

Thanks Sean,

Please do email me the same.

+1 Sean Xu over 2 years ago in reply to PP N

TI__Genius 14580 points

I sent the app note to your email box.

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UCD3138A: Compensation design of half bridge LLC converter.