LM5116 WEBENCH DESIGH (Vin 70-80VDC, Imax 4A, Vout 60VDC )EW VALUE
USING THE T.I. WEBENCH PROGRAM THE FINAL DESIGN CALCULATED PIN 3 - Rt/Sync TO HAVE A VALUE OF 12.4 KOhm. DID NOT HAVE THAT EXACT VALUE RERSISTOR, SO I EDITED THE DESIGN TO CALCULATE A NEW VALE OF 15.0 KOhm RESISTANCE. RECACULATED THE DESIGN THRU WEBENCH AND THERE WERE NO ERRORS. I INSTALLED THE NEW VALUE OF 15.0 KOm FROM PIN 3 TO GROUND AND MEASURED THE RESISTANCE FROM PIN 3 TO GROUND AND IT SHOWED A 22.5 OHM RESISTANCE.
THE VOLTAGE MEASURED FROM PIN 3 TO GROUND WAS 0.0 VOLTS.
** WHY DOES THE INSTALLED VALUE OF RESISTANCE READING 15,000 OHMS WHILE THE MEASURED VALUE IS 22.5 OHMS?
** WHY DO I HAVE ZERO VOLTS ON PIN 3?
