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TPS5210: TPS5210

Sadik Cinik
Prodigy 30 points
Part Number: TPS5210

I would like to design a high-precision hysteresis analog current controller board that provides 5V logic output to the IGBT gate driver. The board will be able to set reference from 0V to 5V which corresponds to 0A to 300A. I want to set the reference externally therefore TPS5210 is not suitable due to the limited voltage range of 1.3 V to 3.5 V. Since high precise control is critical, the hysteresis band should also be around 300uV (18mA). I would appreciate hearing some ic or design suggestions. 

 

  • 0
    TI__Expert 5310 points

    Hello,

    If possible, I want to clarify your design intentions first. Do you intend on using the output of a buck power supply to supply the reference voltage to the IGBT gate driver? If so, how much current do you need to supply the driver logic?How do you plan to vary the reference voltage or change the programming of the reference voltage? I am not sure if a buck controller/converter is necessarily the right product to provide precision voltage control to drive an IGBT gate driver (none of our current buck converters are designed for the 0V (unless the part is disabled of course). If so would you mind sketching out the system you intend on creating?

    I'm more than happy to point you in the direction of any products or ideas I may have to accomplish this. More than anything I am curious about the means you wish to use to command a programmable reference voltage? For an application such as this, I may recommend a precision op-amp buffer or an op-amp with a configurable gain (such that the op-amp can supply any requisite current/voltage to drive the logic value, which I assume is relatively low current but needs a precise voltage) that has its input voltage decoded to a value between 0V and 5V. This also assumes the ability to properly bias the op-amp. That being said, I need to know how you intend on setting the reference voltage to begin with as that will likely involve a process of converting that control input (whether it be a digital code, voltage or current) into the desired reference voltage.

    Regards,

    Alec Biesterfeld