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MSP430I2041: MSP430i2041 Load switch issue

user4719845
Intellectual 315 points
Part Number: MSP430I2041
Other Parts Discussed in Thread: EVM430-I2040S,

Hi

I has a Smart Plug use MSP430i2041 Has buy EVM430-I2040S 2pcs for test 

but when I input 110AV output use different device about (table lamp,Electric fan)when I power on MSP430i2041 will reset I want to know protect is MSP430i2041 reset?

The figure shows the test waveform Ch1(VIN_P), Ch2(VIN_M), Ch3(IIN_P), Ch4(IIN_M)

  • 0
    TI__Mastermind 49692 points

    Hello,

    user4719845 said:
    I has a Smart Plug use MSP430i2041 Has buy EVM430-I2040S 2pcs for test 

    Are you using these individually or connecting them together?

    user4719845 said:
    but when I input 110AV output use different device about (table lamp,Electric fan)when I power on MSP430i2041 will reset I want to know protect is MSP430i2041 reset?

    I'm sorry, but I'm not sure what you're asking. Are you using the EVM430-i2040S on-board power supply? Your shared scope shot seems normal. Perhaps the on-board power supply cannot supply enough power at 110VAC, which could be why the MSP430 is resetting. I suspect that raising the input to 230VAC should help. You could also disable the on-board power supply by removing the jumpers and using two AA batteries in series to supply 3.0V and use an input voltage of 110VAC.

    Last but not least, since you're using the EVM430-i2040S, have you heard about our new Energy Measurement Design Center (EMDC) and Software Library? The GUI allows you to quickly configure the software library, view results, and calibrate your system. There are several example EMDC projects and related, pre-calibrated binary images that you can use for evaluation. Then, you can use these projects (or create a new one) for your design. You can learn more by visiting the EMDC product folder.

    Energy Measurement Design Center for MSP430 MCUs

    [FAQ] MSP-EM-DESIGN-CENTER: Announcing the new Energy Measurement Design Center (EMDC) and Software Library for MSP430 MCUs!

    Regards,

    James

  • 0 in reply to James Evans
    Intellectual 315 points
    Hi James

    I use individually, I try MSP430i2041 DC use Power supply apply 3.3V , so it should not be affected by AC power you can see video.

    www.youtube.com/watch
  • 0 in reply to user4719845
    TI__Mastermind 49692 points
    Hello,

    Thanks for sharing the video. After watching it, this doesn't seem like a reset issue but instead a power issue. Are you saying that even when supplying the EVM430-i2040S with 3.3V from a bench supply the same issue is observed? When using an external supply, make sure you remove the two jumpers that disable the on-board supply. As I mentioned earlier, sometimes I've observed this when using 110VAC or 115VAC but the issue goes away at higher AC input voltages such as 230V. With your setup, the voltage could be dropping below what the on-board power supply requires for power the EVM.

    Regards,

    James

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