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TPS2660: TPS26600 schematic review

Rock Shao
Expert 2995 points
Part Number: TPS2660

Hi Team,

My customer used the TPS26600 for a 24V/10W power supply, and the schematic is as follows.

Please help to confirm whether the schematic can meet the customer's specifications, and suggest which pin can add NTC for the OTP function. thanks.

  • 0
    TI__Guru* 78921 points

    Hi Rock,

    Thanks for reaching out. Can you share schematic that shows component values also? That will help in better review.

    Regards

    Kunal Goel

  • 0 in reply to Kunal Goel
    Expert 2995 points

    Hi Kunal,

    I will ask the customer to provide the component values.
    But may I confirm the SHDN can for the OTP function If I use the PTC or NTC to reach the threshold voltage? thank.

  • 0 in reply to Rock Shao
    TI__Guru* 78921 points

    Hi Rock,

    No need of PTC. This device has a built-in over temperature protection called as thermal shutdown. 

    Regards

    Kunal Goel

  • 0 in reply to Kunal Goel
    Expert 2995 points

    Hi Kunal,

    Please check the components' values. 

    SMD RESISTOR

    0603 0Ω F

    EA

    2

    R104,R103

    SMD RESISTOR

    0603 100K F

    EA

    1

    R105

    SMD RESISTOR

    0603 15.8K F

    EA

    1

    R106

    NC

    NC

    EA

    1

    R107

    SMD CAP

    474K/50V X7R 1206

    EA

    1

    C102

    SMD CAP

    106K/50V X5R 1206

    EA

    2

    C103,C104

    SMD CAP.

    104K/50V X7R 0603

    EA

    1

    C105

    The customer needs the OTP function for the latch mode in the ambient <75%. so we need the external circuit to make sure the function. 

    So please help to check if the used SHDN can meet this function, thanks.

  • 0 in reply to Rock Shao
    TI__Guru* 78921 points

    Hi Rock,

    1. Schematic looks fine. But one thing UVLO pin should also be connected through a resistor to VIN pin. 

    2. If they need latch mode they can use below configuration : 

    3.  Yes SHDN can be used to turn off device. 

    Regards

    Kunal Goel