SRK2000A: IC skips the gate pulses.

[PKulk]

Hi, 

We are working on LLC converter Vout=12V; Pout=100W.

We are using SRK2000A IC at the output.

We are facing some issues related to it.

The IC behaves as expected while driving the load from 30% to 100%.

But when we start reducing the load below 30% the IC starts skipping the gate pulses.

Primary side we dont see burst mode operation.

Attaching the waveforms for reference:

1. Full Load VGS and VDS waveforms; working as expected.

2. <30% load VGS and VDS waveforms; having issue.

 

[Billy OWEN]

Hi @PKulk 

This post has been escalated to the ST Online Support Team for additional assistance.  We'll contact you directly.

Regards,

Billy