PMP8740

anjana salgaonkar

Expert 1460 points

Other Parts Discussed in Thread: PMP8740

Hello,

CAn you provide any details and alternate part no for T4, T7, T2, used in PMP8740 DC-DC converter section.

T4: PQ50-50 145400-A

T7: PQ20-149

T2, T3: AF4779

Thanks,

Anjana

over 7 years ago

0 Roberto S. over 7 years ago

TI__Expert 5895 points

Hello,

The transformer T4 and the inductor T7 are custom made and alternate parts do not exist, sorry.

Also T7 in reality is an inductor. The current flowing through it doesn't have any DC component, and it's actually a resonant inductor. Normally these have low ripple current but here it is 200% peak-peak; this is why the wire is a multi-filar (like LITZ wire) and the delta-B flux density is kept very low.

Regarding T2 and T3, an alternate part can be found in the part number P0584ANL, from Pulse Engineering. I attached the datasheet accordingly.

Best regards,

RobertoP0584.pdf

0 anjana salgaonkar over 7 years ago in reply to Roberto S.

Expert 1460 points

Thanks Roberto.

0 anjana salgaonkar over 7 years ago in reply to anjana salgaonkar

Expert 1460 points

What is the purpose of Q12, Q17, Q25...Q31, Q20, Q32(A,B) and Q33 and periferal cicuit? Please eaxplain.

Anjana

0 Roberto S. over 7 years ago in reply to anjana salgaonkar

TI__Expert 5895 points

Hello,

For the explanation of all functions about Q12...Q20 (hot swap and reverse polarity protection) as well as other functions, plese refer to the attached white paper. Here lot of details are contained and this circuit is explained deeper.

Please let me know if you still have specific questions.

Best regards,

Roberto1452.2kW parallelable power supply module.pdf

0 anjana salgaonkar over 7 years ago in reply to Roberto S.

Expert 1460 points

Good morning,

Thanks Roberto. I will go through the white paper and still if have any doubt I will get back to you. thanks a lot.

Anjana

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PMP8740