WEBENCH-POWER-DESIGNER: The way to view transformer design

Satoshi

Guru 19575 points

Part Number: WEBENCH-POWER-DESIGNER
Other Parts Discussed in Thread: PMP22764

Below is screenshot of Webench transformer reference.

※Upper left: 24Vinput, Lower left: AUX, Right: Isolated 56Vout, it is based on Isolated flyback by PMP22764.

https://www.tij.co.jp/tool/jp/PMP22764

Please let me confirm two points below for transformer information;

・For example, is "Ns1 to Np = 4.563" equal to "Ns1 : Np = 1 : 4.563", correct?

・Please let me know the transformer pin name of Upper left, Lower left, and Right.

　I didn't judge which is Ns1, Ns2, and Np.

　And I guess Np mean secondary output by turn ratio, I feel strange because usually Np=primary side.

Best regards,

Satoshi

over 2 years ago

0 Brigitte over 2 years ago

TI__Guru 59755 points

Hello Satoshi,

Could you please share your Webench design?

Best regards,
Brigitte

0 Satoshi over 2 years ago in reply to Brigitte

Guru 19575 points

Hi Brigitte

Thank you for reply,

I attached shared Webench design, please see below;

https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=AFFC2A5AC76210E7

※I send email request for share design just now, but I could share on above URL.

　Therefore, please ignore email request.

Best regards

Satoshi

0 Brigitte over 2 years ago in reply to Satoshi

TI__Guru 59755 points

Hello Satoshi,

Thank you for sharing the design. When checking the transformer values, Np is the primary winding, Ns1 is the secondary winding and Ns2 is the winding for the auxiliary supply.

I will request that the transformer drawing will be updated to reflect this.

Best regards,
Brigitte

0 Satoshi over 2 years ago in reply to Brigitte

Guru 19575 points

Hi Brigitte

Thank you for reply,

I understood the position of Np, Ns1, and Ns2.

I looking forward your update.

Best regards,

Satoshi

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WEBENCH-POWER-DESIGNER: The way to view transformer design