al8861wt-7

{
  "slug": "al8861wt-7",
  "version": "0.1.0",
  "type": "component",
  "description": "Diodes Incorporated LED Drivers, TSOT-25. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "led-drv",
    "al8861wt-7"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "al8861wt-7.kicad_sym",
    "al8861wt-7.kicad_mod",
    "al8861wt-7.glb",
    "al8861wt-7.step",
    "al8861wt-7.lbr",
    "docs/hero.png",
    "docs/al8861wt-7-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "al8861wt-7-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray"
  },
  "component": {
    "mpn": "AL8861WT-7",
    "manufacturer": "Diodes Incorporated",
    "package": "TSOT-25",
    "pin_count": 5,
    "category": "LED Drivers",
    "datasheet": "https://www.diodes.com/assets/Datasheets/AL8861WT-7.pdf",
    "parts": {
      "symbol": "al8861wt-7.kicad_sym",
      "footprint": "al8861wt-7.kicad_mod",
      "model_3d": "al8861wt-7-etched.glb",
      "model_3d_plain": "al8861wt-7.glb",
      "model_3d_step": "al8861wt-7-etched.step",
      "model_3d_step_plain": "al8861wt-7.step",
      "lbr": "al8861wt-7.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "LX",
        "type": "output",
        "description": "Drain of the internal 40V NDMOS power switch. Connects to the external inductor L1 and the freewheeling Schottky diode D1 to form the buck converter switch node. Switch on-resistance is typically 0.2Ω at ILX = 100mA; leakage < 5µA."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference (0V). Return for internal control, driver, and bypass capacitor C1."
      },
      {
        "number": "3",
        "name": "VSET",
        "type": "input",
        "description": "Multi-function On/Off, brightness control, and soft-start pin. Floating: internal ~1.4µA source pulls up to 4.5V. Drive below 0.2V to disable output; drive with 0.3V-2.5V DC for analog dimming (5%-100% linear), or with a PWM signal (<500Hz for 1%-100% linear range). A capacitor from VSET to GND extends soft-start (~1.5ms/nF; default 0.1ms). Absolute max 6V; keep below 5V in normal operation."
      },
      {
        "number": "4",
        "name": "ISENSE",
        "type": "input",
        "description": "High-side current-sense input. Connect current-set resistor RS between this pin and VIN to define the nominal average LED current: IOUT(NOM) = 0.1V / RS. Mean sense threshold is 100mV (typ) with ±13% hysteresis; input current ~8µA."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply voltage, 4.5V to 40V (absolute max 42V). Decouple to GND with a 10µF or larger X7R/X5R ceramic capacitor placed close to the device. Also serves as the high-side reference for the ISENSE current-sense resistor."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "lcsc": "C581338",
      "digikey": "AL8861WT-7DITR-ND",
      "mouser": "621-AL8861WT-7"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T18:51:48Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": "AL8861WT-7DITR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "621-AL8861WT-7",
        "status": "found"
      }
    },
    "models_3d": [
      {
        "file": "al8861wt-7.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5120f0cee43ef7743cc08408d2c12f234fcac7355386e330a3a16f336e23da8d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "al8861wt-7-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "88706d8502ef58d8219e0bb11cc47e8d5e863d85f0c472082e40a1b1c5f10bae",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}