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LMR70503: Power management

Anna
Intellectual 995 points
Part Number: LMR70503
Other Parts Discussed in Thread: LM5155, LM5156

Hi Dear,

The customer wants to find a power supply.

The input is 12-15V, the output is positive and negative 10V, the output current can reach 3A, and the rectifier is built in.

The specific application is to use two identical chips on a board, One output is positive 10V, and the other output is negative 10V. The specific model used by the customer before is LT1766.

Please ask whether there is a corresponding model recommendation

  • 0
    TI__Mastermind 19715 points

    Hello Anna,

    Thanks for promoting our products.

    Our Boost converters cannot handle a feedback signal with an inverted phase, so it is not possible to generate negative output voltages.
    Usually we propose using a Buck regulator for generating negative outputs.

    What about using a flyback topology with a single controller and two windings on the output?

    Best regards,
    Harry

  • 0 in reply to Harry Hofner
    Intellectual 995 points

    Is there a recommended model that can meet the customer's application

  • 0 in reply to Harry Hofner
    Intellectual 995 points

    Is there a recommended model that can meet the customer's application

  • 0 in reply to Anna
    TI__Mastermind 19715 points

    Hello Anna,

    For a single flyback converter with a transformer with two output windings, please have a look at the LM5155 / LM5156.

    For two separate (identical) Buck controllers (one for +12V to +10V, one for +12V to -12V), may I please ask you to open another thread with a part-number of a BUCK controller, so that it will get routed to the appropriate experts.

    Thanks and regards,
    Harry

  • 0 in reply to Harry Hofner
    TI__Mastermind 19715 points

    Hello Anna,

    I have not seen an update from you for two weeks, so I assume the questions are answered and the issue is solved.
    I close this thread now. If there is still something open, please reply and the thread will get opened again.
    If you have any other question or of the thread has been locked, please open a new one.

    Clicking the Resolved Button also helps us to maintain this forum.

    Best regards,
    Harry