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UCC25800-Q1: 仿真软起动电流

zhaodai li
Prodigy 10 points
Part Number: UCC25800-Q1

看启动时候 原边电感电流并没有很大，和想象的不一样。同时TI看了几个DEMO板的测试报告，也没有看到有测试启动的时候原边电感电流的。帮忙问一下原厂：启动时候，副边由于电容初始电压为0，相当于把变压器短路了，那么原边就相当于SW节点的电压施加在漏感上，由于漏感值比较小，那么原边的电流应该是比较大的，但是仿真时候看起来并没有很大。 另外在仿真软件中没有找到变压器模型，请问如何搭建新的变压器模型

  • 0
    TI__Mastermind 25545 points

    已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

  • 0 回复 Eirwen
    TI__Mastermind 38060 points

    Your E2E submission is difficult to understand from my side. I have copy/paste below several statements from your submission that need clarification. Could you please resubmit and clarify the exact question you are asking?

    The current in the primary inductor during startup is not very high, which is different from what was imagined. 

    • There is no inductor in the primary side of the LLC?

    At the same time, TI reviewed the test reports of several DEMO boards and did not see any evidence of the primary inductor current during test startup. 

    • Reviewed the test reports? Did not see any evidence of the primary inductor current?

    Can you help me ask the manufacturer: 

    • Ask the manufacturer...do you mean the transformer vendor?

    Also, no transformer model was found in the simulation software. How can I build a new transformer model

    • Which sim software has no transformer model?