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  • TPS40305: Reverse Voltage at SW Node

    Resolved
    Part Number: TPS40305 Hi, we make a buck controller topology in which USB PD input. This means input voltages are 5V, 9V, 15V, and 20V. The maximum current is 5A. We want, if the input voltage is 5V, İnput voltage will directly pass to the output. In…
    • Resolved
    • Answered

  • TPS40305: TI WEBench Power Designer shows Depletion Mosfet, BOM shows Enhancement Mosfet

    Resolved
    Part Number: TPS40305 I let Power Designer create a design for me : https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=6A2B344CF0EAC3CF When i checked the schematic and searched for the recommended mosfets i found out, that these were Enhancement…
    • Resolved

  • TPS40305: Low side MOS broken

    TI Thinks Resolved
    Part Number: TPS40305 Other Parts Discussed in Thread: CSD17507Q5A , , TPS40304 , CSD17501Q5A , CSD17506Q5A Hi, We have designed a circuit around the TPS40305DRCR. Vin = 9V to 16V. Vin is connected to an external battery. Vout = 5V/8A. The MOS are CSD17507Q5A…

  • TPS40305: Getting the peak of 35MHz

    TI Thinks Resolved
    Part Number: TPS40305 Hello Team, We are getting the 35MHz peak during the FCC-15B RE testing. Here is the original thread link . We have bypassed the input LC filter and looks like an improvement but that is not a major one that we can test in the lab…
    • Answered

  • TPS40305: TPS40305 Model in PSpice for TI

    Resolved
    Part Number: TPS40305 Hi I'm trying to simulate the buck controller TPS40305, seems even the model test circuit is not working properly. figures attached. Can you help? Thanks
    • Resolved

  • RE: TPS40305: Getting the EMI Peaks

    Pratik Panchal1 said: Pratik: Should I bypass/remove this L-C filter? You can try removing / bypassing the inductor to see if that eliminates the noise by removing the resonance, or you can look at improving the damping to maintain the filtering effect…

  • TPS40305: EMI Issue

    Part Number: TPS40305 Hello TI Team, We were working on the Final FCC & PTCRB certification where we got failure due to the high amount of EMI noise generated by the power ICs. We have identified that TPS40305 IC is the one who is generated the major…

  • 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

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