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LM22671 schematic review?

eric kim
Expert 1400 points
Other Parts Discussed in Thread: LM22671

Hi, 

Can I get LM22671 schematic review?

I'd like to use negative output Voltage that is -4.5Vout.

But below circuit's output Voltage is +0.2V measured only...

Could you please check what is wrong?

Thanks,

eric.

  • 0
    TI__Genius 15810 points

    Hello,

    Are R344 and R345 your feedback resistors? Why are they connected as such? You seem to have connected R345 from FB to SW. Your upper feedback resistor should be from FB to Vout and lower feedback resistor should be from FB to ground to form a resistor divider at FB.

    Regards,
    Akshay