Power ManagementのトピックRe: Power Supply for LS1046

Power Supply for LS1046

Ellu24 — Mon, 31 Oct 2022 04:14:52 GMT

I am trying to bring up a board using LS1046 and using a design similar to freeway board. I am using PF8100 and LTC7150 for multioutput voltages and VDD respectively. I am using programmable DC power supply for giving 3.3V,3 A and 12V,1.8A as input and not observing the expected voltages. Please find the attachment to see the measured and expected voltages. Please help me to resolve the problem.

Is there any software to simulate PF8100?

Thanks in advance

Re: Power Supply for LS1046

guoweisun — Mon, 31 Oct 2022 05:39:37 GMT

Did you add the load on each channel? If not please add load to test again.

Re: Power Supply for LS1046

Ellu24 — Mon, 31 Oct 2022 06:16:41 GMT

Thank you very much for your prompt response. I am testing the power supply with the complete board, so that I hope each channel has load. Or please recommend me on adding load on each channel.

Re: Power Supply for LS1046

guoweisun — Mon, 31 Oct 2022 06:21:58 GMT

You can try to add external 500mA on such as 2.5V output channel, then test again.

Re: Power Supply for LS1046

Ellu24 — Tue, 01 Nov 2022 01:27:38 GMT

Thank you very much for your advice.

I will do as per your recommendations and let you know the outcome. Is there any software that we can simulate PF8100 and observe the waveforms? Is there any reason for the unexpected voltages?

Thanks in advance

Re: Power Supply for LS1046

guoweisun — Tue, 01 Nov 2022 03:00:25 GMT

No more the simulation model for this part.

Lots of reasons can lead to the error output,for example mistake on mount components/mistake for select regulator components/etcs.