BCT1901EGG-TR

{
  "slug": "bct1901egg-tr",
  "version": "0.1.0",
  "type": "component",
  "description": "BROADCHIP DC-DC Converters, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "bct1901egg-tr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bct1901egg-tr.kicad_sym",
    "bct1901egg-tr.kicad_mod",
    "bct1901egg-tr.glb",
    "bct1901egg-tr.step",
    "bct1901egg-tr.lbr",
    "docs/hero.png",
    "docs/bct1901egg-tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bct1901egg-tr-hero.glb",
    "bct1901egg-tr-hero.overlay.json",
    "bct1901egg-tr-etched.glb"
  ],
  "component": {
    "mpn": "BCT1901EGG-TR",
    "manufacturer": "BROADCHIP",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589837362483265536",
    "parts": {
      "symbol": "bct1901egg-tr.kicad_sym",
      "footprint": "bct1901egg-tr.kicad_mod",
      "model_3d": "bct1901egg-tr-hero.glb",
      "model_3d_plain": "bct1901egg-tr-etched.glb",
      "model_3d_step": "bct1901egg-tr-etched.step",
      "model_3d_step_plain": "bct1901egg-tr.step",
      "lbr": "bct1901egg-tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2962006"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T00:04:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "3",
        "name": "LX1",
        "type": "output",
        "description": "Power switching output of regulator 1 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "4",
        "name": "EN1",
        "type": "input",
        "description": "Active-high enable pin of regulator 1, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "5",
        "name": "FB2",
        "type": "input",
        "description": "Output feedback pin of regulator 2 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "6",
        "name": "IN2",
        "type": "power_in",
        "description": "Power supply input of regulator 2, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "9",
        "name": "LX2",
        "type": "output",
        "description": "Power switching output of regulator 2 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "10",
        "name": "EN2",
        "type": "input",
        "description": "Active-high enable pin of regulator 2, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "11",
        "name": "FB3",
        "type": "input",
        "description": "Output feedback pin of regulator 3 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "12",
        "name": "IN3",
        "type": "power_in",
        "description": "Power supply input of regulator 3, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "15",
        "name": "LX3",
        "type": "output",
        "description": "Power switching output of regulator 3 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "16",
        "name": "EN3",
        "type": "input",
        "description": "Active-high enable pin of regulator 3, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "17",
        "name": "FB4",
        "type": "input",
        "description": "Output feedback pin of regulator 4 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "18",
        "name": "IN4",
        "type": "power_in",
        "description": "Power supply input of regulator 4, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "20",
        "name": "LX4",
        "type": "output",
        "description": "Power switching output of regulator 4 that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS; the SWn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "21",
        "name": "EN4",
        "type": "input",
        "description": "Active-high enable pin of regulator 4, with a rising threshold of 1.5 V and a falling threshold of 0.4 V; the ENn pin is rated -0.3 V to VIN+0.3 V."
      },
      {
        "number": "22",
        "name": "FB1",
        "type": "input",
        "description": "Output feedback pin of regulator 1 that senses the output and regulates it to 0.6 V (VFB 0.585 V to 0.615 V) through an external resistive divider."
      },
      {
        "number": "23",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin, listed as NC in the datasheet pin description table."
      },
      {
        "number": "24",
        "name": "IN1",
        "type": "power_in",
        "description": "Power supply input of regulator 1, specified for VIN from 2.7 V to 5.5 V with an absolute maximum of 6.5 V."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "Ground and thermal pin (exposed pad) for the package."
      }
    ],
    "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: Pin types for LX (switching node), FB, and EN are inferred from the functional descriptions because ; The pin configuration drawing text was garbled in extraction, so pin positions were taken from the p; Pin 25 is the GND thermal pin that serves as the exposed pad of the QFN package. The datasheet names"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0482,
        "at": "2026-10-21T00:00:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589837362483265536",
        "pages": 8,
        "sha256": "babfcd0b56ad1306",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bct1901egg-tr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bct1901egg-tr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "be9598147f6795811233b30b9e251ebd808856a1afe96300f10a23d4485054ca",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}