• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 2 answers
  • Subscribers 38 subscribers
  • Views 509 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

PMP30763: DO160 current harmonic limits

PMP30763: DO-160G harmonic request can handle full range or not

Chao Fu Chen
Intellectual 1170 points
Part Number: PMP30763
Other Parts Discussed in Thread: PMP31179

Hi Expert,

I saw the use guide said this design can meet the DO-160G harmonic limited.

but the AC input range only 96V ~134V , Is it can handle full range(90V~264V)  on this design ?

Eddie

  • 0
    TI__Expert 6005 points

    Hi Chao,

    The PMP30763 is a custom design, and the input AC voltage range has been defined by the customer.

    It covers only 90 VAC - 134 VAC, 400 Hz - 800 Hz input, therefore it is not possible to apply voltages > 134 VAC.

    If universal VAC input is needed, then the whole power supply has to be redesigned, both PFC and LLC stages.

    Regards,

    Roberto

  • 0 in reply to Roberto S.
    TI__Intellectual 1170 points

    Hi Roberto,

    Thanks ! and one more question about this application can also meet hte DO-160 Harmonic current request or not ?

    Because we checked the sample picture and schematic, there are 3 input bulk capacitors with larger capacitance. Does larger capacitance used for mitigating the harmonic current? In generally design, 400W PSU will not has so large capacitance.

    Eddie

  • 0 in reply to Chao Fu Chen
    TI__Expert 6005 points

    Hi Eddie,

    The PMP30763 and PMP31179 both meet the DO-160 G harmonic limits, regardless of the output electrolytic capacitance. This output capacitance is needed to hold Vout during hold-up situation and minimize the high frequency and low frequency ripple; in addition it provides power during load transients. Only if the output 2 x Fmains (input AC frequency) ripple is too high (typically > 5%) due to insufficient electrolytic capacitors, then this ripple can affect harmonic content; this is why we cannot minimize it too much.

    Best regards,

    Roberto

  • 0 in reply to Roberto S.
    TI__Intellectual 1170 points

    Hi Roberto,

    Got it , these board can apply the real sample for my customer to check performance or not ?

    Eddie 

  • 0 in reply to Chao Fu Chen
    TI__Expert 6005 points

    Hi Eddie,

    If I get it correctly, do you need a prototype to be shipped to your customer? If that is the case, please enter a PDS request by opening a Jira ticket.

    Just send me an email in case you need further details.

    Regards,

    Roberto