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I found what I need to apply my xilinx virtex5 FPGA board, PTH05050W 6-A, 5-V INPUT NON-ISOLATED WIDE OUTPUT ADJUST POWER MODULE at www.ti.com.

Maybe, this need to change by resistor to set output voltage. But there's not any information about what kind of resistor type I need it.

Would you please help me what kind of type resistor do I need to set the voltage level.

My question is not about resistor charicteristic. I can read this form the PDF. My question is the type what type of SMT resistor or ceramic resistor or something else.

update

I'd like to change the resistor in http://www.ti.com/lit/ds/symlink/pth05050w.pdf But I found so many type resistors as bwlows.

1005(1%) 1005(5%) 1005 1608(0.1%) 1608(1%) 1608(5%) 1608 2012(0.1%) 2012(1%) 2012(5%) 2012 3216(5%) 3216 3225 5025 5025..

I don't know what kind of type resistor I need it. Would you help any hint?

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    \$\begingroup\$ Rset is shown as a 1%, 0.1W type with values between 698 and 36k5 according to the chart on page 3 of the pdf ti.com/lit/ds/symlink/pth05050w.pdf \$\endgroup\$
    – JIm Dearden
    Commented May 15, 2016 at 12:04
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    \$\begingroup\$ You couldn't even be bothered to proofread the title! If you don't take your problem seriously, then there's no reason we should either. Screw this \$\endgroup\$
    – Olin Lathrop
    Commented May 15, 2016 at 12:19

1 Answer 1

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According to the datasheet, page 6, which is always a good reading. The requirements for the \$ R_{SET} \$ are:

  • Power rating 0.05 W
  • Tolerance 1%
  • Temperature stability 100ppm/°C

enter image description here

Also there information about the correct placement too.

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  • \$\begingroup\$ I'd like to change the resistor in ti.com/lit/ds/symlink/pth05050w.pdf But I found so many type resistors as bwlows. 1005(1%) 1005(5%) 1005 1608(0.1%) 1608(1%) 1608(5%) 1608 2012(0.1%) 2012(1%) 2012(5%) 2012 3216(5%) 3216 3225 5025 5025.. I don't know what kind of type resistor I need it. Would you help any hint? \$\endgroup\$
    – nashile
    Commented May 16, 2016 at 6:32
  • \$\begingroup\$ If you are going to solder the resistor by hand then 2012(1%) will be good. Also these numbers are the metric size of the resistors in inches, so a 2012 is 2.0 x 1.25 inch a 3216 is 3.2 x 1.6 inch, and so on. Recommended reading. \$\endgroup\$
    – Bence Kaulics
    Commented May 16, 2016 at 9:26
  • \$\begingroup\$ How about 1608 by hand? \$\endgroup\$
    – nashile
    Commented May 17, 2016 at 2:45
  • \$\begingroup\$ If you are not experienced in soldering, I do not recommend. \$\endgroup\$
    – Bence Kaulics
    Commented May 17, 2016 at 10:20

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