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  • LM5121-Q1: LM5121 efficiency improvement

    TI Thinks Resolved
    Part Number: LM5121-Q1 We had assemble the board and tested with upto 10A. Initially we got efficiency less than 90%. After the removal of snubber circuit parallel to high side N channel MOSFET, we got efficiency upto 93%. Is there any method such that…
    • Answered

  • LM5121-Q1: will not start switching

    Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 Hi there, I have implemented a 55V 5A boost converter design using the LM5121 (stepping up from ~30-42V battery input voltage). However, the design will not start switching - I only get the…
    • Resolved
    • Answered

  • LM5121-Q1: Kindly review the Boost Converter schematics

    Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 Hi Ti Team, Kindly review the Boost Converter scheme attached below. Kindly review Critical design Parameters as follows Output Voltage: 24V Output Voltage: 215W Input Nominal Voltage: 11…
    • Resolved
    • Answered

  • LM5121-Q1: Inquire about output

    Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5122 , LM5122-Q1 , , LM5121 Hi TI experts, We have to design according to the specifications below. Vin : 10~16V Vout : 36V Iout : 30A I did use TI's webench. LM5122-Q1_simulation(30A).pdf However…
    • Resolved

  • LM5121-Q1: Alternate wide and narrow duty cycles resulting in higher voltage ripple

    TI Thinks Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 Boost converter Input : 5V Output : 10V@ 6A Switching frequency:450 Khz Output ripple is observed around 400mV.After probing Switch node,Wide and narrow duty cycles observed alternately. Changed…

  • LM5121-Q1: Can the location of the disconnect FET be moved before the current sense resistor

    TI Thinks Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 , LM2766 I would like to use the disconnect FET as an inrush limiter to the input capacitor. That means that the FET would be before the input cap and the Vin/SCP connections. Will this work…

  • LM5121-Q1: Is it Possible to Use IC without Inrush Current Limit and Disconnection Switch Functions ?

    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 Hello Team, My question is, in the "simplified application diagram" that is mentioned in the datasheet, what would happen, if i could choose not to use the MOSFET in input side (which gate…

  • LM5121-Q1: LM5121 Boost converter with external gate driver

    TI Thinks Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 , LM5114 Hi, I am planning to use LM5121 for converting input (18V to 50V) to output 55V @ 8A. To reduce the switching FET losses,I have selected GAN FET(GS61008). It needs a gate driver since…
    • Answered

  • LM5121-Q1: Input Bulk capacitor after series disconnection switch

    Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 , LM5069 , LM5122 Hi, In LM5121,Shall I put bulk capacitor after disconnection switch? So that I can limit my input inrush current due to Filter capacitors. By doing so,Will it affect current…
    • Resolved

  • LM5121-Q1: Can we use series disconnection FET Rds ON for current sensing

    TI Thinks Resolved
    Part Number: LM5121-Q1 Other Parts Discussed in Thread: LM5121 Hi, I am going to use LM5121 for 5V to 10V@6A Can we use series disconnection switch Rds,on for current sensing instead of Current sensing resistor to reduce the component and converter size…

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