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TPS65150: Boost Converter issue in TPS65150

Anonymous
Prodigy 140 points
Part Number: TPS65150

Tool/software:

We are using the TPS65150PWPR IC to power our LCD. Below is the schematics along with the electrical parameters of the LCD module. We are encountering an issue where the input voltage appears on the output after the diode drop in the Boost Converter. We are not seeing any voltage boost in the AVDD_12V line. Could you provide advice on what might be causing this issue?

  • 0
    TI__Mastermind 27000 points

    Hi Anonymous,

    What are the resistance of Boost FB resistors? The schematic you uploaded is not with high resolution so it is not clear to see the details.

    BTW, did you capture any waveforms during the IC power on? You can monitor the Boost Vout to see whether the Vout ramps up to higher than VIN or it doesn't ramp at all.

    BR

    Patrick