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  • TPS40305: Getting the EMI peaks

    Part Number: TPS40305 Hello Peter, We have incorporated below list of changes in the design. FB15= 330ohm ferrite bead (MPZ2012S331AT000) C589= 820pF C590= 22uF C101=10nF R789= 3R3 R790=10R also added 0.1uF on parallel to C590 & C64 I have added 3R3…
    • Answered

  • TPS40305: Generating high noise and failing in the Certification

    Resolved
    Part Number: TPS40305 Hi, We are using TPS40305 to convert 8-16V (VIN) to 4.5V (@9A) Vout. This power supply is becoming main culprit in the PTCRB certification (not able to reach to the limitations for TIS). As soon as we remove this supply from equation…
    • Resolved
    • Answered

  • TPS40305: Issue with transient current

    Resolved
    Part Number: TPS40305 Hi I use the evm sample and design my own board, but I have issue with output voltage which does not stabilize after input transient voltage or current. you can see in below graph the voltage stay off until high current or transient…
    • Resolved
    • Answered

  • TPS40305: Ripple to large

    Resolved
    Other Parts Discussed in Thread: TPS40305 art Number: TPS40305 Hi I am using TPS40305 in my circuit and the output ripple does not match my calculation. My ripple is around 75mV which is a lot higher than 35mv calculated. What could be the reason, the only…
    • Resolved

  • TPS40305: Device failed in the 200MHz-1GHz FCC EMI Testing

    TI Thinks Resolved
    Part Number: TPS40305 Our product is failing in the 200MHz-1GHz FCC EMI Testing. After the debugging we have identified that we TPS40305 is generating that noise specifically Q7 & Q8. Kindly find the result of EMI test. Kindly find the layout screenshot…

  • TPS40305: circuit is not regulating correctly under load

    Part Number: TPS40305 Team, Can you please help my customer with an implementation of TPS40305: The circuit is not regulating correctly under load. I see your WEBENCH tool for the device but it is very limited since my MOSFETs and Inductor are not in…
    • Answered

  • TPS40305: Output accuracy for constant current application

    Resolved
    Part Number: TPS40305 Other Parts Discussed in Thread: TPS40303 , TPS62130 , TPS82130 Hi - I have a design that uses the TPS40305 configured in a feedback regulated constant current configuration to deliver 26A to an LED. This design has been adapted in…
    • Resolved

  • TPS40305: OCP protection issue

    TI Thinks Resolved
    Part Number: TPS40305 Hi team, We have some issues using TPS40305. Our condition is Vin = 12V / Vout = 6V / Iout = 1.5A. After calculation, I set Rs = 3kohm and our MOSFET is using https://www.infineon.com/dgdl/irfs4615pbf.pdf?fileId=5546d462533600a4…

  • TPS40305: TPS40305 Ripples Issue

    TI Thinks Resolved
    Part Number: TPS40305 Hi, I am using TPS40305DRCR switcher IC to generate 3.3V from 5V input. It is designed to generate 3.3V with 9A load. The switching frequency is 1.2 MHz. When I connect an external load of 1A or more, I am receiving ripples at input…

  • TPS40305: 3.3V Switcher EMI issue

    Part Number: TPS40305 Hi TI Team, We are using TPS40305 switcher with 5V input and 3.3V, 9A output. We are facing issue in pre-compliance test (FCC Part 15B). We are getting out of limit 160MHz broadband noise. Can you please help on reducing this broadband…

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