• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 297 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

LM34966-Q1: Using LM34966 as voltage doubler

Danilo A.
Mastermind 24705 points
Part Number: LM34966-Q1
Other Parts Discussed in Thread: LM5156

Hi Team,

Our customer wants to design a power supply using LM34966 with the following specifications.

Minimum input voltage = 8V
Maximum input voltage = 24V
Output voltage = 150V
Power Output = 80W

Upon simulating the device with Webench it seems that this is not possible using LM34966 and the solutions provided are using flyblack converter. However, our customer would like to use the voltage doubler as shown below. The output from the boost converter is 40V, 2.5A. Is this possible? If yes, can you please suggest one that would work for this application? 

Regards,

Danilo  

  • 0
    TI__Mastermind 42201 points

    Hi Danilo,

    the Webench for the LM34966 just now only supports the Sepic design, so not sure why and how a Flyback has been suggested with this inputs.

    When entering just the spec without device (8-24V Vin / Ouput:40 V /2.5A) several designs are suggested. As mentioned the LM34966 just now has support for Sepic in Webench but using the LM5156 also gives a very good reference.

    Said that generating an output of 40V/2.5A should work without issues.

    The boost from 40 to 150V with the Villard networks should also work. Just have not checked if the required power can be delivered by this.

    This needs to be either calculated, simulated or tested.

    Best regards,

     Stefan

  • 0 in reply to Stefan Schauer
    TI__Mastermind 24705 points

    Hi Stefan,

    Thank you very much for the confirmation and for your  suggestion.

    Regards,

    Danilo