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TPS40210 High Voltage Output

Taesoo Im
Prodigy 10 points
Other Parts Discussed in Thread: TPS40210

I'd like to design a High Voltage Power Supply using TPS40210.

Would you provide me the input 12V and output 100V/100uA reference design?

Thank you. 

  • 0
    TI__Expert 3875 points

    Hi Taesoo,

    Sorry for the delayed reply. TI has a software called SwitcherPro which can be used to make DC/DC switching mode power supply designs. However, the TPS40210 is not well supported in SwitcherPro. I will transfer your post to the "Non-Isolated DC/DC" forum. Maybe someone in that forum has a design with specs similar to what you need.

    Thanks,
    Michael

    Michael Krasnicki
    Analog eLab
    Texas Instruments

  • 0
    TI__Guru 56925 points

    Taesoo,

     

    The applications support forum is not designed to provide reference design for a specific application.  TI does provide such services, however they require specific customer and project related information prior to committing to provide that service.

    If you would like me to push your reference design request to that group, please select my name and send a private message with:

     

    Name

    Company Name

    Project Reference Name

    Expected Annual Build Quantity

    Design Specification:

    Input Voltage Range - Vin(min) Vin(typ) Vin(max)

    Output Voltage Range Vout (typ) & acceptable tolerance

    Output Current Range: Minimum, average, Maximum (sustained > 30 seconds) and Maximum (peak < 30 seconds)

    Additional requirements:  Shut-down/Enable/Disable control, Line or Load transient specifications, required output capacitance, size contraints, etc

  • 0 in reply to Peter James Miller
    TI__Guru 56925 points

    Otherwise, there are design equations provided in the TPS40210 datasheet that will guide you through a design.

     

    One possible issue - the TPS40210 design equation for selecting the current limit resistor adds 500mA of current to the expected peak switch current to account for the additional current in the source of the MOSFET during FET turn-on.  With such a low output current (100uA) the switch current will also be quite low and this will result in a current sense resistor that is too small.  Due to this, I would recommend taking the following steps:

    1) Add a 20W resistor between GDRV and the gate of the external MOSFET, this will reduce the gate drive current to a more managable level.

    2) Select the current sense filter components for 1/3 the calculated On-Time rather than the normally recommend 1/10.  This will remove more of the gate drive pulse from current sense and allow a much larger current sense resistor. 

     

    If you do not do this to allow a much larger current sense, the small current sense resistor will suppress the current feedback and the compensation equations in the datasheet that were developed for a current mode control boost converter will not function properly.