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TPS63030 unstable

eli
Guru 13485 points
Other Parts Discussed in Thread: TPS63030EVM-417

When we check it the TPS63030EVM-417 as is (the power-saving mode disabled) we can see that:

 

At No Load – Switching frequency = 800khz.

Up to 0.13A – Switching frequency unstable.

More than 0.13A – Switching frequency = 2.4Mhz.

 

No additional Cin/Cout help.

Our load will be 0.05A (Switching frequency unstable).

Is it normal operation?

  • 0
    TI__Guru*** 142860 points

    You will need to supply some waveforms of Vin, Vout, and L1/L2 to show what you mean by unstable.  Additionally, it is recommended to test with a resistive load.  Electronic loads can sometimes cause erratic operation with their active control loop.