LGS63040EP

{
  "schema_version": 1,
  "type": "component",
  "slug": "lgs63040ep",
  "title": "LGS63040EP",
  "brief": "Legend Si LED Drivers, ESOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "led-drv",
    "lgs63040ep"
  ],
  "component": {
    "mpn": "LGS63040EP",
    "manufacturer": "Legend Si",
    "package": "ESOP-8",
    "pin_count": 9,
    "category": "LED-drv",
    "subcategory": "LED Drivers",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2304071430_Legend-Si-LGS63040EP_C5280695.pdf",
    "parts": {
      "symbol": "lgs63040ep.kicad_sym",
      "footprint": "lgs63040ep.kicad_mod",
      "model_3d": "lgs63040ep-etched.glb",
      "model_3d_plain": "lgs63040ep.glb",
      "model_3d_step": "lgs63040ep-etched.step",
      "model_3d_step_plain": "lgs63040ep.step",
      "lbr": "lgs63040ep.lbr"
    },
    "distributor_links": {
      "lcsc": "C5280695"
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No external component required. Recommended to be grounded."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin. Return for power switch and control circuitry."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node (drain of the 350mΩ low-side NMOS, RDS(on) typ 350mΩ). Externally connected to power inductor and Schottky diode. Peak current limit ~1.7A typ. Pins 3 and 4 are internally tied and must both connect to the switching node."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node (second SW pin, internally tied to pin 3). Connect together with pin 3 to the inductor/Schottky junction."
      },
      {
        "number": "5",
        "name": "VIN/OUT",
        "type": "power_in",
        "description": "Combined output-voltage sense / input-voltage supply pin (3.0-60V operating range, 60V absolute max). Acts as VIN in boost/lift topologies and as the output-voltage sense point in buck topologies; connects to the top of the RSENCE current-sense resistor."
      },
      {
        "number": "6",
        "name": "CSN",
        "type": "input",
        "description": "LED current-sense (sampling) pin. Connect to the low side of external sampling resistor RSENCE. Regulation loop forces V(VIN)−V(CSN) ≈ 0.2V typ (0.195-0.205V), giving IOUT = (V(VIN)−V(CSN))/RSENCE."
      },
      {
        "number": "7",
        "name": "OVP",
        "type": "input",
        "description": "Output overvoltage-protection sense pin. Tie to a resistor divider from the output (RH/RL); OVP triggers at 1.0V typ (recovery 0.9V). Absolute max −0.3V to 6V. Used in boost/lift applications to protect against open-LED faults; VOUT_OVP = (1 + RH/RL) × 1.0V."
      },
      {
        "number": "8",
        "name": "EN",
        "type": "input",
        "description": "Enable / dimming input. Rising threshold >0.5V enables the output, falling <0.4V shuts the chip down (IS ~10µA). Analog dimming range 0.6-1.2V on LGS63040 sets LED current proportionally; above 1.2V (up to 6V max) gives 100% current. Internal ~800kΩ pull-down; do not leave floating. IEN typ 5µA at VEN=5V."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed thermal pad on package bottom, internally connected to GND. Must be soldered to the PCB ground plane for thermal dissipation (θJB ≈ 33.2°C/W, θJA ≈ 173°C/W).",
        "source": "renumbered-to-footprint-pad"
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2304071430_Legend-Si-LGS63040EP_C5280695.pdf",
        "pages": 22,
        "sha256": "13f24f98441db88d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm@sha256:5848244c5e72002e",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "lgs63040ep.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lgs63040ep-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f6727579d657d7e38d79ee80f0cfd07d4f1c840a04b70cfc81eac868d89bb7e0",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Legend Si",
      "Package": "ESOP-8",
      "Category": "LED-drv",
      "Pins": "9"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lgs63040ep"
  ],
  "discovery_pitch": "LGS63040EP (Legend Si) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lgs63040ep.kicad_sym",
    "lgs63040ep.kicad_mod",
    "lgs63040ep.glb",
    "lgs63040ep.step",
    "lgs63040ep-etched.step",
    "lgs63040ep.lbr",
    "docs/hero.png",
    "docs/lgs63040ep-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "variants": [
    {
      "mpn": "LGS63040EP",
      "kind": "packaging"
    },
    {
      "mpn": "LGS63040EPB5",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T23:58:03.135Z"
}