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TPS40057: Please help!The TPS40057 does work any more....

Harry Zhang
Prodigy 10 points
Part Number: TPS40057
Other Parts Discussed in Thread: TLV272, LM358

I try to use this circuit to modify my power moduel.However when i done the circuit.the TPS40057 didnt work any more! Even i remove the circuit.Could you please help me what's problem is?

I replaced LM358 with TLV272.

The ADJ pin connect to the VFB pin in TPS40057 with a 1.6K resistance to GND.

  • 0
    TI__Genius 11040 points
    Hello Harry,

    Can you please share the entire schematic with the entire applications circuit for the TPS40057?

    Also, what do you mean by did not work any more? Does this device regulator an irregular output or irregular switching waveform? Is this device unable to support a load current, etc? Can you please expand on this statement?

    What do you mean by: "Even i remove the circuit."? Do you mean you disconnect the TPS40057, and look at the remaining circuit without the TPS40057? Or do you mean you disconnect the TPS45007 and only observe the performance of the TPS40057?

    Thank you,
    Katelyn Wiggenhorn
  • 0 in reply to Katelyn Wiggenhorn
    TI__Genius 11040 points
    Hi Harry,

    Due to inactivity, I am going to close this thread. However, if you have any additional questions, please respond to this thread.

    Best Regards,
    Katelyn