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CC1310: transient current when startup

Cherry Zhou
Mastermind 22235 points
Part Number: CC1310


Hi team,

Here's a question from the customer may need your help:

Relevant description can be found in section  5.4 Power consumption Summary of CC1310 Spec. This project uses electrical power, special AC/DC devices, and the customer has found the following info:

"Input voltage again rises above the UVLO rising threshold.
During this time the output voltage will be loaded by less than 100 NA."

Special Powered Rear AC/DC Component Output Voltage DC 3.6V, Quiescent current 89nA. After 250 seconds of power, VOUT3.6 V, and the current can reach 50mA.

What is the minimum required transient current for the CC1310 to start-up? Does the unfunctional IO need to be grounded?

VDDR has changed to 1.65V output in 250 seconds, are there any other modifications needed?

Thanks.

Best Regards,

Cherry

  • 0
    TI__Mastermind 18435 points

    Hi Cherry,

    Apologies for the delay in answering this, we have had an unusually high number of enquiries this week - I will aim to answer your questions in the next couple of days.

    Regards,

    Zack 

  • +1
    Mastermind 6470 points
    Cherry Zhou said:
    "Input voltage again rises above the UVLO rising threshold.
    During this time the output voltage will be loaded by less than 100 NA."

    Could you elaborate some here? What is UVLO in this context? 

    Cherry Zhou said:
    VDDR has changed to 1.65V output in 250 seconds, are there any other modifications needed?

    What do you mean here, VDRR should be 1.65 V if not in boost mode?

    If the current draw increase to 50 mA the circuit is not functioning as it should. I would recommend requesting a schematic review to enable ZC understand more of the schematic.