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  • LM74700-Q1: Vcap dropout problem of LM74700 on sync buck converter output side

    Part Number: LM74700-Q1 Tool/software: Hi every one, I made an battery charger using sync buck converter with a 48V 30A output. The LM74700 is used as a O-ring at the output side. When testing the board, I found the Vcap of LM74700 will drop from 12V…
    • Answered

  • LM5146-Q1: Loss Calculation of FET when paralleling MOSFETs

    Resolved
    Part Number: LM5146-Q1 Tool/software: Hello experts, My customer is using LM5146-Q1 and would like to know loss equations when they paralleled MOSFETs as shown in the image below. Could you please give me the loss equations table like in p.30 of the…
    • Resolved
    • Answered

  • BQ25750: Simple Buck Boost charger - no power path FET - no reverse mode

    Resolved
    Part Number: BQ25750 Other Parts Discussed in Thread: BQ25756 Tool/software: I am not sure where to connect the SYS terminal in this circuit. I think it should be directly connected to the battery, but some guidance would be very welcome. Regards…
    • Resolved
    • Answered

  • BQ25756: In buck mode, how is the HS BOOST FET always ON if the HS BOOST FET is driven by a bootstrap circuit which needs to be refreshed?

    Resolved
    Part Number: BQ25756 Tool/software: Datasheet Table 8-1 "Switching MOSFET Operation" states that the LS BOOST FET is OFF and the HS BOOST FET is ON when the charger is operating in Buck mode. Section 8.2 "Functional Block Diagram" shows that the HS…
    • Resolved
    • Answered

  • TPD1S514: How to calculate the total loss inside the device with FET current pass

    Resolved
    Part Number: TPD1S514 Tool/software: Dear Specialists, My customer is considering TPD1S514 and has a question. I would be grateful if you could advise. --- I think the total loss of the TPD1S514 needs to take into account not only its own current…
    • Resolved

  • LM5146: sync fly buck converter Ic heating

    TI Thinks Resolved
    Part Number: LM5146 Tool/software: Hey! We at bss-at ( https://bss-at.com/) are building power supply for input 14v to 60 volts and outout 12 volts. The circuit used by us was exported from TI power designer (webench.ti.com/.../switching-regulator) using…

  • MCT8329A: Motor Lock and Loss of Sync faults sometimes won't clear via I2C

    Part Number: MCT8329A Tool/software: Dear Texas Instruments Support Team, I am experiencing an issue with the MCT8329A High Speed Sensorless Trapezoidal Control Three-phase BLDC Gate Driver on a custom board based on the evaluation board schematic.…

  • CC3120: FATAL ERROR: Sync loss detected #012#015

    Part Number: CC3120 We are using the CC3120 in our product. After some time from powering up the device the wifi application repeatedly crashes with the following error: wifi_bridge_log[15626]: [ERROR] - FATAL ERROR: Sync loss detected #012#015 wifi_bridge_log…
    • Answered

  • TPS543C20A: Behavior during external SYNC signal loss

    Resolved
    Part Number: TPS543C20A Hello, In our design, we use one TPS543C20A and two TP S543B20 to generate three power rails from 12V. In order to avoid too much current demand on the 12V, we apply on each converter a external signal on the sync pin (each…
    • Resolved

  • LM5149-LM25149DESIGN-CALC: Update plan for limitation or alert for power loss

    TI Thinks Resolved
    Part Number: LM5149-LM25149DESIGN-CALC One customer requested that LM5149-LM25149DESIGN-CALC add notice or cell's limitation or alert if power loss are extremely increased. When output current and other specs enter severe spec, power loss are extremely…

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