PMP4344: Components values

CRISTIAN SOUZA

Prodigy 20 points

Part Number: PMP4344

On Universal AC input 5V@1.2A Cube Charger, what are the values and purpose for C6 and R15?

Best Regards

over 7 years ago

0 Don Dapkus over 7 years ago

TI__Guru**** 189401 points

Hi Cristian,

Please see Figure 29 of the d/s for the values.

As for the purpose, I need to ask my colleague about that. I'll let you know what I find tomorrow.

0 Don Dapkus over 7 years ago in reply to Don Dapkus

TI__Guru**** 189401 points

Hi Cristian,

I verified with my colleague, and the RC across the diode is to lower the diode ringing to lower its voltage stress. It can also alter the ringing frequency in order help with EMI emission.

Let me know if you have any other questions. If this answered your question, please press the Green button to let me know!

0 CRISTIAN SOUZA over 7 years ago in reply to Don Dapkus

Prodigy 20 points

Hello Don, thank you for the quick answer.

It became clear to me the purpose of the RC circuit but i could not find any figure referred by the number 29 in any document. The only documents i found referring these components were the BOM list and the schematic and in both documents the values are N/A. Can you send me this d/s (cristian@etereo.com.br) or paste the link?

0 Don Dapkus over 7 years ago in reply to CRISTIAN SOUZA

TI__Guru**** 189401 points

Hi Cristian,

Sorry I wasn't clear. Here is the link to the section of the on-line data sheet. Scroll down a little to find Fig 29:
www.ti.com/.../layout

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PMP4344: Components values