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BOOSTXL-AFE031-DF1:

yerra lokesh
Prodigy 40 points
Part Number: BOOSTXL-AFE031-DF1
Other Parts Discussed in Thread: LAUNCHXL-F28379D,

Tool/software:

hi sir/madam,

i'm using this BOOSTXL-AFE031-DF1 with LAUNCHXL-F28379D (DAC MODE) for powerline communication. i'm using it over a DC line. i have gone through this also (Interfacing the C2000Tm With an AFE03x: B-FSK Example). i have some questions regarding that.

1. what is the coupling capacitor rating for integrating it to a 28v DC line? is there any formula to find that?

2. and how can i integrate RTC (real time clock) for monitoring the working hours of a light and storing those working hours cumulative sum on the onboard memory. (using this PLC. i.e I want code modification)?

  • 0
    TI__Guru* 77541 points

    Hi Yerra,

    yerra lokesh said:
    1. what is the coupling capacitor rating for integrating it to a 28v DC line? is there any formula to find that?

    The standard practice is that you need to have 2X to 3X of overvoltage rating for selecting coupling capacitor for 28Vdc rating. It depending on the application requirement, perhaps low leakage capacitor should be used. So you would need a minimum 50Vdc or higher coupling capacitors for your application. It also depends on the DC line current rating, which you did not specify. If this is low current rating, then regular ceramic capacitor may work. Otherwise, you have to increase the coupling capacitor up to close to 100Vdc rating. 

    yerra lokesh said:
    2. and how can i integrate RTC (real time clock) for monitoring the working hours of a light and storing those working hours cumulative sum on the onboard memory. (using this PLC. i.e I want code modification)?

    The PLC is able to responsible to transmitting/receiving communication data. Are you using the PLC protocol to collect sunlight exposure information per your application. If this is the case, you would need to light detector or integrator sensor to monitor the light intensity information (this is separate analog function), and convert the analog data to digital information via MCU and send it back via your PLC controller. 

    Please take a look at the application note - SPRAC94D pdf.

    This is doable, but I need additional application details. 

    Best,

    Raymond

  • 0 in reply to Raymond Zhang1
    Prodigy 40 points

    hi sir,

    can we connect in a call, so that i can clearly explain what my requirement is.

  • 0 in reply to yerra lokesh
    TI__Guru* 77541 points

    Hi Yerra,

    I will be happy to have a technical support via a call or WebEx, but these are typically accompanied with TI's FAE. Could you find local FAE who is supporting the product line? Our FAE is able to arrange the support. 

    If you are unable to find our FAE in your location, please let us know. 

    Best,

    Raymond 

  • 0 in reply to Raymond Zhang1
    Prodigy 40 points

    HI SIR,

    I don't know how to approach them.

  • 0 in reply to yerra lokesh
    TI__Guru* 77541 points

    Hi Yerra,

    Could you tell me the city and country that you are in? And I will see that if we can find AFE to contact you. 

    Best,

    Raymond

  • 0 in reply to yerra lokesh
    TI__Guru* 77541 points

    Hi Yerra,

    Please give me a few days and I will see if I am able to request an AFE to contact you. 

    Best,

    Raymond

  • 0 in reply to Raymond Zhang1
    TI__Guru* 77541 points

    Hi Yerra,

    I have asked our Honeywell FAE to contact you in Banglore, India. If you are unable to hear from our AFE, please let me know.   

    Best,

    Raymond