UCD3138ALLCEVM150: LLC

Yapeng

Hi，expert.

In LLC-HB firmware，The following statement：

#define TH (1 / (250e3)) //PWM mode period. 250khz This is also the maximum resonant frequency (ZCS feature increased from 150KHz）

But in UCD3138ALLCEVM150 User's Guide，

In pwm mode, why are the frequencies of the two different?

Thank you！

8 months ago

0 Yapeng 8 months ago

Prodigy 65 points

Can I modify these parameters directly in the code?

0 Ian Bower 8 months ago in reply to Yapeng

TI__Genius 17090 points

Yes, you should be able to modify the parameters directly in the code. However it looks like the user guide was not updated for the latest version of the code. I'd strongly suggest just using the latest version from the web. There may be other changes related to the change in the frequency. We're set up to support the web version.

0 Yapeng 8 months ago in reply to Ian Bower

Prodigy 65 points

Hi，lan，Thank you for your reply.The code is the latest version，I also want to ask why DT0 and DT0SR are 350 and 700？

0 Yapeng 8 months ago in reply to Yapeng

Prodigy 65 points

What do these parameters mean? How are their values calculated?

0 Xuemei Lu 8 months ago in reply to Yapeng

TI__Intellectual 1720 points

Hello Yapeng,

Sorry for the late reply. DT0 and DT0SR are the dead time for primary MOS and SR respectively, they shall be different from application to application.

DAC_OVP and OVP_EXP are used to translate ov_limit and uv_limit got over PMBus to be the value written to ACOMP register. You can search DAC_OVP and OVP_EXP within the project, and see how they are used.

Best Regards,

Xuemei

0 Ian Bower 8 months ago in reply to Xuemei Lu

TI__Genius 17090 points

this seems to be resolved, so I'm going to close it.

Power management

Power management forum

UCD3138ALLCEVM150: LLC