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TPS65150: TPS65150 schematic review

David Park
Expert 5670 points
Part Number: TPS65150

Hi,

Could you review the schematic of TPS65150?

There is no switching at boost converter block.

Thanks.TPS65150_TIDE.pdf

  • +1
    TI__Mastermind 18550 points

    Hi David,

    Reviewing the schematics, nothing particular jumps out that should cause boost to not switch but I did notice that compensation network is not ideal for 5V input. For 5V input, please use C112 of 2.2nF and R134 of zero ohm as recommended in table 1 in the datasheet.. The other issue I am thinking of is that with AVDD output of 10.4V and VGH of 16V, you should only need one stage of the positive charge pump. So I suggest to remove D16, C89. Please see if the circuit works with these changes. If not, please capture some scope plots of AVDD, VGH, VGL and VIN at at power up at few different time scales. These plots may reveal more as to why the boost is not switching. Does the boost switch at power up and than stops switching after few mili seconds  or does it not switch at all?

    Kind Regards,

    Liaqat