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TPS548D22: control output use soft within 0.8V ±0.01V

user5006944
Intellectual 630 points
Part Number: TPS548D22
Other Parts Discussed in Thread: TPS548D21

Now I use tps548d22 in  miner. Input is 12Vdc output is 0.8V 40A.I want to control output  using soft within  0.8V ±0.01V.How can I do it .thanks.

  • 0
    TI__Guru**** 191445 points

    Hi User,

    TPS548D22 has selectable precision reference voltage by pin strapping.  There is an internal option for 0.8008  V.  Connect a 100 k resistor from BP to VSEL and connect a 22.1 k resistor from VSEL to GND for latch off OCP or a 19.1 k resistor from VSEL to GND or hiccup mode OCP.  In this case you can connect RSP and RSN directly to the output without feedback resistors.  See figure 18 in the datasheet.

  • 0 in reply to JohnTucker
    Intellectual 630 points
    Dear John
    Thanks for your help . Maybe I didn't express clearly what I mean. I know how to get 0.8V, but I don't know how to use software to control ±0.01V.Because of ensure accurate core voltage.so I will adjustment Real-time. Can I use a DAC output connect RSP?Internal ref voltge is 0.9V.Does 0.9V affect?
    Best Regards,
  • 0 in reply to user5006944
    TI__Guru**** 191445 points
    User,

    If you need to scale the voltage, then TPS548D21 provides for adjustable output scaling. Let me know what you think.
  • 0 in reply to JohnTucker
    Intellectual 630 points
    Dear John
    I want to control the output ±0.01V followed by Core voltage at any time?How can I get it. Can I use a DAC output connect RSP?Internal ref voltge is 0.9V.Does 0.9V affect?
    Best Regards,