TPS54531: About the calculation of R3, C6, C7

Yuta Nishie

Part Number: TPS54531
Other Parts Discussed in Thread: TPS54302, TPS54538, TPS62933

Tool/software:

Hi,

Am I correct in understanding that the simulation tool that Ryan-san is referring to in the following thread is Webench?

If it's a different tool, would you be able to provide it?

Best Regards,

Nishie

0 Gui He 5 months ago

Hi Nishie

Sorry that this is old device and I'm also not sure what the simulation tool is. We can't find the tool.

Thanks and best regards.

0 Yuta Nishie 5 months ago in reply to Gui He

Genius 5005 points

Hi Gui-san,

Thank you for your reply.

1. I understood that there is no tool. To calculate it, should I use the following formula that was posted in another thread?

R3=2*pi*fc*VOUT*COUT/(Gmea*Vref*Gmps)=2*3.14*20kHz*5V*(47uF+47uF)/(92umhos*0.8V*20A/V)=40k

2. Also, I understood that the TPS54531 is an old product, so could you recommend a successor product?

Best Regards,

Nishie

+1 Gui He 5 months ago in reply to Yuta Nishie

Hi Yuta

Recommend TPS54302/ TPS62933 for 3A Iout. TPS54538 for 5A Iout.

Thanks and best regards.

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