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Original question:

TIDA-00951: bidirectional DC-DC converter

bidirectional DC-DC converter buck- boost

atish tailor
Prodigy 70 points
Other Parts Discussed in Thread: LM5170

I need to develop a bidirectional dc-dc converter using a buck-boost power stage.  I have seen these are limited to about 12v-48v bus rails for automotive applications. 

I have a bus rail of 84V on the LV battery side and 325V on the HV side.  what limits the IC to lower voltages? The power I need to transfer is 1.2kw.

  • 0
    Prodigy 5 points
    Hello Atish,
    If you would, what is your application?
  • 0 in reply to Ed Walker
    Prodigy 70 points

    The application is renewable energy systems.  Im not sure if the c2000 series IC can achieve this without detailed software understanding/ modifications (something im trying to avoid) or the LM5170 can manage it with some additional driver ICs to isolate the higher voltages?

    I am looking for a minimalistic transformer less, 2 switch solution (as apposed to using multiple Bridges which turns into 6-8 switches).

    Any recommendations/ suggestions highly appreciated. 

    I can reduce the high voltage spec down to 260V if it aids to simplify my problem.