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WEBENCH® Tools/LM5175QUICKSTART-CALC: 12V Project: I/P Voltage 9-16V, O/P Voltage 8.5V, O/P Current 1.2A - 1.8A & 24V Project: I/P Voltage 18-32V, O/P Voltage 18V, O/P Current 1.2A - 2A


Tool/software: WEBENCH® Design Tools


one of our customer has considered  LM5175QPWPTQ1 for below DC-DC LED drivers:

1. 12V Project: I/P Voltage 9-16V, O/P Voltage 8.5V,  O/P Current 1.2A - 1.8A

2.  24V Project: I/P Voltage  18-32V,  O/P Voltage 18V,  O/P Current 1.2A - 2A,

now they are facing problem with circuit that o/p voltage regulation is poor & Noise in circuit board ( Q1 Gate waveform distortion observed as I/p voltage changes). they have referred WEBENCH online tool of TI & component values selected are as per tool only. Still facing Regulation & Noise issues in both board ( 12V & 24V) So please  Suggest if any components need to change to overcome these issues or any change is required in schematic or PCB Layout.

please verify attached schematic & PCB Layout and suggest the corrections. Gerber Converter 22.01.2019.zipDC-DC Converter board.xls3660.schematic.pdf