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CSD25501F3: CSD25501F3

luo sui
Prodigy 70 points
Part Number: CSD25501F3
Other Parts Discussed in Thread: TINA-TI

大家好，我尝试用CSD25501F3来搭建一个开关控制电路，用来控制3.3V供电的开启与关闭。3V3_control.TSC

附件是使用tina搭建的仿真电路，在进行直流传输特性仿真时发现输出结果与预期不符，请帮忙检查下是什么原因，谢谢

  • 0
    TI__Mastermind 35660 points

    Hello Luo Sui,

    Thanks for your interest in TI FETs. I tried your simulation file with a DC voltage of 1.8V instead of VG1 and the results are not as expected. I believe there is an error in the model. I will review the model in more detail and respond to you when I have more information.

    Best Regards,

    John Wallace

    TI FET Applications

  • 0 in reply to John Wallace1
    TI__Mastermind 35660 points

    Hello Luo Sui,

    I looked into this further and I think you made a mistake with the pin assignments when creating the TINA-TI. The pins are: 1 = drain, 2 = gate and 3 = source. I created the macro in the attached TINA-TI simulation and it works as expected.

    Thanks,

    John

    6825.3V3_control.TSC

  • 0 in reply to John Wallace1
    Prodigy 70 points

    Hello John

    感谢你的分析解答，很有帮助。

    我尝试用你修正了的电路，进行直流传输特性仿真，发现输出的震荡很大，这个可以通过调整这个电路的哪些元器件参数来优化吗

  • +1 in reply to luo sui
    TI__Mastermind 35660 points

    Hi Luo,

    Try adding some resistance on the output side of your circuit to GND. I added a 1kΩ resistor and increased to 100kΩ and the circuit seems to work OK. I think what you are seeing is noise and/or leakage thru the FET. Let me know if you still have issues.

    Thanks,

    John

  • 0 in reply to John Wallace1
    Prodigy 70 points

    HI，John

    谢谢你的解答