data/json/DLP/889133.json

{
  "ticketNumber" : "889133",
  "reporterName" : "Thomas Gati",
  "rankPoints" : "20",
  "resolutionStatus" : "",
  "ticketName" : "TPS50601A-SP: TPS50601A-SP Load and Line regulation; Vsense voltage not constant, it varies",
  "rankName" : "Prodigy",
  "replies" : " 3",
  "views" : " 55",
  "queryText" : "Part Number: TPS50601A-SP Hi Test results (24 degrees C case is shown) indicate load and line regulation issues. Voltages are measured with respect to analog return. In particular, the Vsense pin voltage is expected to remain constant (within micro volts) as load current and input voltage are varied. Test results indicate undue magnitudes of voltage variation of the Vsense pin. MHP50601A TPS50601A-SP EM319 Load Vout1 Vsense Vss PG EN Vin Tsink Iin Pin Pout Ploss efficiency ch1 ch2 ch3 ch4 ch5 ch8 ch9 ch10 Test Date UNIT amp volt volt volt volt volt volt °C amp watt watt watt 2/6/2020 SN1 0.101 0.886 0.809 1.486 1.647 1.345 3.292 26.2 0.037 0.1 0.1 0.0 72.6% 2/6/2020 SN1 6.004 0.802 0.798 1.447 1.658 1.319 3.268 25.9 2.532 8.3 4.8 3.5 58.2% 2/6/2020 SN1 0.101 0.887 0.809 1.497 3.001 1.761 5.997 26.2 0.031 0.2 0.1 0.1 47.8% 2/6/2020 SN1 6.004 0.727 0.785 1.429 3.006 1.753 5.985 26.4 1.270 7.6 4.4 3.2 57.4% 2/6/2020 SN1 0.101 4.385 0.810 1.495 2.501 1.655 4.996 28.1 0.106 0.5 0.4 0.1 83.6% 2/6/2020 SN1 6.004 4.410 0.814 1.498 2.525 1.639 4.939 28.2 6.060 29.9 26.5 3.5 88.5% 2/5/2020 SN1-16 0.101 0.884 0.809 1.517 1.646 1.347 3.289 28.5 0.037 0.1 0.1 0.0 73.1% 2/5/2020 SN1-16 6.004 0.802 0.798 1.484 1.512 1.321 3.264 28.4 2.610 8.5 4.8 3.7 56.5% 2/5/2020 SN1-16 0.101 0.883 0.809 1.528 2.999 1.760 5.994 28.5 0.031 0.2 0.1 0.1 47.7% 2/5/2020 SN1-16 6.004 0.721 0.784 1.453 3.005 1.752 5.982 28.7 1.282 7.7 4.3 3.3 56.5% 2/5/2020 SN1-16 0.101 4.381 0.809 1.526 2.499 1.655 4.993 30.4 0.106 0.5 0.4 0.1 84.0% 2/5/2020 SN1-16 6.004 4.406 0.814 1.528 2.524 1.639 4.935 30.3 6.057 29.9 26.5 3.4 88.5% 2/6/2020 SN2 0.101 0.889 0.809 1.449 1.649 1.344 3.295 22.3 0.039 0.1 0.1 0.0 70.6% 2/6/2020 SN2 6.004 0.808 0.798 1.405 1.659 1.318 3.271 22.4 2.559 8.4 4.9 3.5 58.0% 2/6/2020 SN2 0.101 0.889 0.809 1.458 3.002 1.762 5.999 23.1 0.032 0.2 0.1 0.1 47.3% 2/6/2020 SN2 6.004 0.734 0.786 1.376 3.007 1.754 5.987 23.6 1.294 7.7 4.4 3.3 56.9% 2/6/2020 SN2 0.101 4.387 0.810 1.456 2.501 1.655 4.997 25.7 0.107 0.5 0.4 0.1 82.8% 2/6/2020 SN2 6.004 4.412 0.815 1.455 2.526 1.639 4.940 26.0 6.068 30.0 26.5 3.5 88.4% 2/5/2020 SN2-16 0.101 0.874 0.807 1.503 1.646 1.347 3.289 28.6 0.037 0.1 0.1 0.0 73.1% 2/5/2020 SN2-16 6.004 0.792 0.796 1.465 1.603 1.320 3.265 28.1 2.518 8.2 4.8 3.5 57.8% 2/5/2020 SN2-16 0.101 0.873 0.807 1.514 2.999 1.760 5.994 28.3 0.031 0.2 0.1 0.1 48.0% 2/5/2020 SN2-16 6.004 0.720 0.784 1.437 3.005 1.752 5.982 28.5 1.267 7.6 4.3 3.3 57.1% 2/5/2020 SN2-16 0.101 4.371 0.807 1.511 2.499 1.655 4.993 29.8 0.106 0.5 0.4 0.1 83.9% 2/5/2020 SN2-16 6.003 4.404 0.814 1.515 2.524 1.639 4.935 30.0 6.048 29.8 26.4 3.4 88.6% 2/6/2020 SN3-16 0.101 0.866 0.806 1.496 1.646 1.342 3.288 28.7 0.037 0.1 0.1 0.0 72.0% 2/6/2020 SN3-16 6.004 0.764 0.791 1.458 1.656 1.315 3.265 28.2 2.481 8.1 4.6 3.5 56.6% 2/6/2020 SN3-16 0.100 0.866 0.806 1.507 2.999 1.758 5.994 28.5 0.031 0.2 0.1 0.1 47.4% 2/6/2020 SN3-16 6.004 0.696 0.780 1.432 3.005 1.750 5.982 28.7 1.262 7.5 4.2 3.4 55.4% 2/6/2020 SN3-16 0.101 4.364 0.806 1.505 2.499 1.652 4.993 30.1 0.106 0.5 0.4 0.1 83.8% 2/6/2020 SN3-16 6.003 4.394 0.812 1.508 2.524 1.636 4.936 30.1 6.056 29.9 26.4 3.5 88.3% 2/6/2020 SN4 0.101 0.877 0.808 1.466 1.648 1.349 3.292 25.8 0.037 0.1 0.1 0.0 72.3% 2/6/2020 SN4 6.004 0.802 0.797 1.428 1.659 1.323 3.268 25.5 2.607 8.5 4.8 3.7 56.5% 2/6/2020 SN4 0.101 0.878 0.808 1.476 3.001 1.762 5.997 25.9 0.031 0.2 0.1 0.1 48.1% 2/6/2020 SN4 6.004 0.727 0.785 1.402 3.007 1.755 5.985 26.2 1.320 7.9 4.4 3.5 55.3% 2/6/2020 SN4 0.101 4.376 0.808 1.474 2.501 1.657 4.996 28.0 0.106 0.5 0.4 0.1 83.5% 2/6/2020 SN4 6.004 4.396 0.812 1.476 2.526 1.641 4.938 28.0 6.074 30.0 26.4 3.6 88.0% 2/5/2020 SN8 0.101 0.889 0.809 1.485 1.646 1.346 3.289 29.1 0.037 0.1 0.1 0.0 73.2% 2/5/2020 SN8 6.004 0.812 0.799 1.453 1.501 1.319 3.263 28.8 2.745 9.0 4.9 4.1 54.5% 2/5/2020 SN8 0.101 0.889 0.809 1.495 2.999 1.759 5.994 28.8 0.031 0.2 0.1 0.1 47.8% 2/5/2020 SN8 6.004 0.733 0.786 1.421 3.005 1.751 5.981 29.1 1.363 8.1 4.4 3.7 54.0% 2/5/2020 SN8 0.101 4.386 0.810 1.492 2.499 1.654 4.993 30.6 0.106 0.5 0.4 0.1 83.4% 2/5/2020 SN8 6.003 4.387 0.811 0.987 0.032 1.638 4.935 30.8 6.094 30.1 26.3 3.7 87.6% 2/5/2020 SN14 0.102 0.883 0.808 1.505 1.646 1.349 3.290 27.6 0.038 0.1 0.1 0.0 72.6% 2/5/2020 SN14 6.004 0.797 0.796 1.469 1.657 1.323 3.265 27.8 2.562 8.4 4.8 3.6 57.2% 2/5/2020 SN14 0.101 0.883 0.808 1.516 3.000 1.761 5.995 28.4 0.032 0.2 0.1 0.1 46.9% 2/5/2020 SN14 6.004 0.729 0.785 1.443 3.005 1.753 5.983 28.5 1.300 7.8 4.4 3.4 56.3% 2/5/2020 SN14 0.101 4.380 0.809 1.513 2.499 1.656 4.994 29.9 0.106 0.5 0.4 0.1 83.9% 2/5/2020 SN14 6.004 4.405 0.814 1.516 2.524 1.640 4.936 29.9 6.070 30.0 26.4 3.5 88.3%",
  "partNumber" : " TPS50601A-SP",
  "allResponseList" : [ {
    "contentId" : "3288679",
    "userName" : "Christian Yots",
    "rankPoints" : "9520",
    "rankName" : "Genius",
    "date" : "Mar 17, 2020 3:17 PM",
    "userId" : "32944",
    "content" : "Hi, I can look into this but will need more information from you. The variation on the regulated output, and therefore, Vsense is highly dependent on the external circuitry of the converter. Could you please provide schematic for each scenario (target VOUT) including the ESR of the output capacitance being used. Also, please provide what regulation ripple you have designed for. You can send to me privately if you prefer not to post on this public forum. Thanks Christian"
  }, {
    "contentId" : "3299381",
    "userName" : "Thomas Gati",
    "rankPoints" : "20",
    "rankName" : "Prodigy",
    "date" : "Mar 27, 2020 4:01 PM",
    "userId" : "6301225",
    "content" : "simulation POL Hybrid 1-0.pdf"
  }, {
    "contentId" : "3323240",
    "userName" : "Christian Yots",
    "rankPoints" : "9520",
    "rankName" : "Genius",
    "date" : "Apr 21, 2020 5:53 PM",
    "userId" : "32944",
    "content" : "Hi, From the schematic provided it appears you are targeting the following applications: VIN=3.3, 5V, 6V IOUT = 100mA, 6A Fswitching = 300kHz VOUT = 2.515V Can you confirm these are the target applications. The VOUT measured is not 2.5V as it should be indicating a gross problem. The compensation circuit in the schematic does not look correct for me. I estimate the following comp circuit. R9=12kohms C3=22nF C6=650pF Thanks Christian"
  } ],
  "tags" : [ "/support/power-management/f/196/tags/TPS50601A_2D00_SP", "/support/power-management/f/196/tags/TPS50601A_2D00_SP%2bLoad%2band%2bLine%2bregulation", "/support/power-management/f/196/tags/Vsense%2bvoltage%2bnot%2bconstant" ],
  "fourmType" : "TI"
}