SD4950TR

{
  "slug": "sd4950tr",
  "version": "0.1.0",
  "type": "component",
  "description": "Hangzhou Silan Microelectronics DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "sd4950tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sd4950tr.kicad_sym",
    "sd4950tr.kicad_mod",
    "sd4950tr.glb",
    "sd4950tr.step",
    "sd4950tr.lbr",
    "docs/hero.png",
    "docs/sd4950tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sd4950tr-hero.glb",
    "sd4950tr-hero.overlay.json"
  ],
  "component": {
    "mpn": "SD4950TR",
    "manufacturer": "Hangzhou Silan Microelectronics",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908813950337025",
    "parts": {
      "symbol": "sd4950tr.kicad_sym",
      "footprint": "sd4950tr.kicad_mod",
      "model_3d": "sd4950tr-hero.glb",
      "model_3d_plain": "sd4950tr.glb",
      "model_3d_step": "sd4950tr-etched.step",
      "model_3d_step_plain": "sd4950tr.step",
      "lbr": "sd4950tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C19712348"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T23:21:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 539 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Drain of the internal 150 V power MOSFET for the DC/DC flyback stage, rated -0.3 to 150 V referenced to CS."
      },
      {
        "number": "2",
        "name": "VDD",
        "type": "power_in",
        "description": "PoE positive power input for the PD controller, rated -0.3 to 100 V referenced to VSS, with internal UVLO turning on above 38 V and off below 31 V."
      },
      {
        "number": "3",
        "name": "VSS",
        "type": "power_in",
        "description": "PoE negative power input and the reference node for the PD controller electrical parameters."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the DC/DC controller, with the GND input current internally limited to 960 mA."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply for the DC/DC controller, with an operating range of 9.5 to 20 V, start-up at 16.2 V, UVLO off at 8.4 V, absolute maximum of 26 V, and VCC overvoltage protection at 22.5 V."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "DC/DC loop compensation pin, with a high clamp of 2.3 to 2.5 V (2.4 V typical) and an absolute maximum rating of -0.3 to 7 V."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "DC/DC feedback input sampled at half the demagnetization time and regulated to a 3 V reference, with output overvoltage at 3.5 V, short-circuit detection at 1.45 V, and an absolute maximum rating of -0.3 to 7 V."
      },
      {
        "number": "8",
        "name": "CS",
        "type": "input",
        "description": "DC/DC peak-current sense input, with CS maximum of 0.8 V typical, abnormal-current protection at 1 V, and an absolute maximum rating of -0.3 to 7 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin-arrangement diagram text on page 3 is garbled and its numbering is hard to map to physical p"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0565,
        "at": "2026-10-09T23:18:53"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590908813950337025",
        "pages": 13,
        "sha256": "c941bc2793c9cecd",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sd4950tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sd4950tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7b7992afa141e56ea782384767ed54f8ea774d26f3825b1140220c196414625f",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}