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TPSM53604: TPSM53604 Inverter issue

Chen Alex1
Expert 2045 points
Part Number: TPSM53604

hi sir


I use TPSM53604 as the inverter output, but it is easy to burn,could you help me to check the schmatic ? thanks

  • 0
    TI__Mastermind 47060 points

    Hi,

    What type of load current are you trying to pull (IOUT =?). Referring to the SNVA897 app note, using the curve in red (VOUT = -1.8V) which is the closest to your application, the maximum output current for 24Vin is around 2.7A.

    What do you mean by easy to burn? Is the device being damaged or is it getting hot? If it is getting hot, how big is the PCB you have this IBB device on? The schematic looks correct following the aforementioned app note. 

    Regards,

    Jimmy

  • 0
    TI__Mastermind 47060 points

    Hi,

    May I get an update to my feedback and questions?

    -Jimmy 

  • 0 in reply to Jimmy Hua
    Expert 2045 points

    hi  Jimmy

    we found a key point,

    I pull the enable pin(Pin 2) to high direct,and apply the power to vcc , that the chip work correct

    If I apply the VCC to TPSM53604 First, then control the Enable pin By MCU I/O, the chip will damaged

    please advise it,thanks

  • 0 in reply to Chen Alex1
    TI__Mastermind 47060 points

    Hi Alex,

    After further inspection of the schematic I believe the issue is with the EN pin. The pin function states that EN pin should not be floating. As such I would suggest having a 10kΩ pull up resistor between EN and VIN. This will prevent the EN pin from floating. If you ever need to disable the device, GPO_N_PWR_EN can be pulled low to turn the device off.

    This may be why the chip is getting damaged.