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Two TPS60110 in Parallel Use

Thomas Stockklauser
Prodigy 10 points
Other Parts Discussed in Thread: TPS60110

Hello,

i have a customer Projekt with two TPS60110 onbard, the two DC/DC Regulators are Parallel in One line to have more Output Current, is this a Problem or can mak this Problems?

Regards

Thomas Stockklauser

  • 0
    TI__Guru**** 155706 points

    I do not forsee a problem but would like to test on the bench today and respond tomorrow.  Regardless of this testing, your customer needs to understand that the two charge pumps will not share the load current equally, i.e., one will pull slightly more current than the other because one will have a reference voltage that is slightly higher than the other and therefore provide a slightly higher output voltage.  If your customer is expecting the full 300mA from both, for a total of 600mA, then one charge pump will be running in current limit. 

  • 0 in reply to Jeff F
    TI__Mastermind 45250 points

    I tested this setup yesterday in the lab and everything worked fine. The two chips will not equally share the load as stated by Jeff in the previous post.

    You might want to read Ballast Resistors Allow Load Sharing Between Two Paralleled DC/DC Converters. This app note will help you to optimize the configuration.

    Please let me know if you have any further questions.

    Richard Elmquist