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.

TIDA-01168: Modification for lower power configuration

Part Number: TIDA-01168
Other Parts Discussed in Thread: LM5170-Q1

Hello,

When lower power for example 200W and we want to optimize the design, what we can do?

Single-phase configuration is enough? I think TIDA-01168 max current for each side are 41.5Arms for 12V side and 10.5Arms for 48V side.

We expecting 12V side (acutal usage is lower voltage) is 60Arms and 48V side is 4.2Arms.

It seems to be able to make the system by single-phase. Is my understand correct?

Best regards,

Toshihiro Watanbae

  • Hello,

    thank you for your interest in TIDA-01168. There are many factors which influence the decesion. I suggest that you first decide if you want to optimize your design for

    • Size
    • Efficiency
    • Cost.

    In general, it is possible to create a 200W step-down power stage. Based on the numbers you provided, I expect that voltages are 48 and 3.3 V. This means very low duty cycle ratio D= 0.068. This will affect efficiency, ripple current through the inductor and limit the switching frequency due to minimal ton.

    Such conversion ratio is rather unusual for a bidirectional DC/DC converter. I would suggest a different DC/DC step-down controller if you don't need a bidirectional power transfer. If you really need a bidirectional DC/DC converter then LM5170-Q1 based solution with two phases (100W each) would do the job.

    Our webench tool helps with components selection significantly.

    Alternatively I recommend Power Stage Designer which has been recently released in version 4.

    Best Regards, Jiri Panacek