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AM62A7-Q1: Is it need use the remote sense in PMIC FB pin?

Part Number: AM62A7-Q1

Hi Expert,

as I know, usually in customer board PCB design, we will ask customer use the remote sense in some power rail for more accurate feedback. but in our EVM schematic, I find we only ask customer Route as Pseudo differential pair trace. so in AM62A customer can don't use the remote sense? need you double confirm.

...

BR,

Biao

  • Hello Biao,

    Thank you for the query.

    Can you please elaborate your query. Is this a query related to the PMIC where you are doing remote sensing.

    If yes, please share the part number and also refer to the PMIC data sheet and checklist.

    Regards,

    Sreenivasa

  • Hi Sreenivasa,

    I am asking for the TPS6593 for AM62A, there is any additional requirement for customer's PCB layout in TPS6593 FB pin? 

    BR,

    Biao

  • Hello Biao,

    Thank you. 

    Please refer to the guideline in the data sheet.

    I am not sure if there is a schematics and layout checklist in works for the PMIC.

    https://www.ti.com/lit/ds/symlink/tps6593-q1.pdf

    11 Layout

    11.1 Layout Guidelines

    4.If the processor load supports remote voltage sensing, connect the feedback pins FB_Bx of the device to the respective sense pins on the processor. If the processor does not support remote voltage sensing, then connect the FB_Bx pin to a representative load capacitor. With differential feedback, also connect the negative feedback pin to the negative terminal of the same load capacitor. The minimum recommended trace width is 6 mils. The sense lines are susceptible to noise. They must be kept away from noisy signals such as PGND, PVIN_Bx, and SW_Bx, as well as high bandwidth signals such as the I2C. Avoid capacitive and inductive coupling by keeping the sense lines short, direct, and close to each other. Run the lines in a quiet layer. Isolate them from noisy signals by a voltage or ground plane if possible. Running the signal as a differential pair is recommended. If series resistors are used for load current measurement, place them after connection of the voltage feedback

    Regards,

    Sreenivasa

  • Hi Sreenivasa,

    Thanks a lot. 

    BR,

    Biao

  • Hello Biao,

    Thank you for the note.

    Regards,

    Sreenivasa