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TPS55287-Q1: Programming output to 22V

Gerardo Vanoni
Prodigy 240 points
Part Number: TPS55287-Q1


Tool/software:

Hello

The datasheet of the TPS55287-Q1 states that the output can be adjusted up to 22V.


On the other hand, when setting REF to max (1200mV) and INTFB ot min (0.0564), the output voltage is about 21.2V according to Vout=Vref/INTFB.

What can be done to reach the 22V as stated in the datasheet?

Is it done by using external voltage feedback? Or by changing the CDC (cable voltage droop compensation)?

Are there other (new) alternative parts, which would allow a higher programmable output voltage (I mean in-application programmable, to change the output on the fly)? Needed current is below 1A, nominal Vin is 24VDC.

Best Regards

Gerardo

  • +1
    TI__Genius 16690 points

    Hi Gerardo,

    Thank you for reaching out. 

    Gerardo Vanoni said:
    Is it done by using external voltage feedback?

    Yes, you can use external voltage feedback to get 22V output.

    For higher output voltage, you can consider LM5177-Q1 currently, but the cost will be high. May I know what is your application here and what is your target output voltage?

    Regards,

    Mulin