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PMP40379: UCC256302

Intellectual 865 points

Replies: 10

Views: 171

Part Number: PMP40379

Hello,

I am working off the PMP40379 reference design.

Can you all suggest alternatives to 750343844 Transformer, 220 uH, TH?

We are looking for a cost effective Transformer, off the shelf!

In addition, can you provide the PMP40379 Schematic in Eagle format. Trying to speed up time to market.

Best Regards,

Neil Henry

irad llc

  • Hi Neil,

    Thanks for your post. Unfortunately due to the power level and topology there really is no "off the shelf" component that can be used for the transformer.

    You can contact Swaroop at Wurth to help with sourcing the part.

     <Swaroop.Vaidyanath@we-online.com>

    Also, for the schematic we can not export to Eagle format, but you may try to import the design.

    Sorry there is not much else I can do to help.

    Thanks,

    Robert

  • In reply to Robert Taylor1:

    Robert,

    What tool can I use to import the design? Not sure what tool used for the schematic.

    Thanks,

    Neil

  • In reply to Neil Henry:

    Hi Neil,

    The designs are done using Altium.

    Thanks,

    Robert

  • In reply to Robert Taylor1:

    Hello Robert,

    Please recommend a suggested heat-sink for this board, part number 782653B04250G not available at Mouser.

    Is there an alternative to this part number!

    Is there another way to dissipate heat without the large heatsink?

    I have a board size constraint!

    Regards,

    Neil Henry

    IRAD

  • In reply to Neil Henry:

    Hi Neil,

    There is around 30W of power dissipation at full load (500W), so you can dissipate that heat in any manner necessary.

    If there is a case, or liquid cooling, or something along those lines, that would help.

    Either way, there is about 30W of heat that needs to go somewhere.

    Thanks,

    Robert

  • In reply to Robert Taylor1:

    Hello Robert,

    That info helped, for this supply will go into a power amplifier chassis!

    Kindly make suggestion for DC 2 DC conversion. In this reference design we have +-42 V.

    We need to leverage this supply for auxiliary supply for front end +-15V.

    With this reference design, what TI IC can you recommend for this conversion to +-15v?

    The client wants to add a front-end active filter pre-amp board using the NE5532 and or LM833.

    Therein we need to DC-DC voltage conversion to +-15 volts. We need a optimal but cost effective solution. The budget has over ran using this PMP40379: UCC256302 reference design.

    Appreciate the assist!

    Regards,

    Neil Henry

    IRad

  • In reply to Neil Henry:

    Hi Neil,

    It really depends on how much power you need for the +/- 15V rails.

    We have a large number of parts that are 60V rated that would work well for this.

    Take a look at LM5160A or LM5161 if you need a bit more margin.

    Thanks,

    Robert

  • In reply to Robert Taylor1:

    Robert,

    We like the TI MC34063. What is the VAC and VDC supply voltage?

    Datasheet says 40V MAX. Is this 40VAC?

    What is the VDC maximum?

    Neil

  • In reply to Neil Henry:

    Hi Neil,

    The max voltage is listed in DC.  This means 40V between VCC (and most other pins) and GND.

    So you can not use this with a 42V input.

    Thanks,

    Robert

  • In reply to Robert Taylor1:

    Robert,

    Thank you.

    We will work with LM5161.

    Regards,

    Neil

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