BL8851

{
  "slug": "bl8851",
  "version": "0.1.0",
  "type": "component",
  "description": "BL(Shanghai Belling) AC-DC Controllers & Regulators, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "bl8851",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bl8851.kicad_sym",
    "bl8851.kicad_mod",
    "bl8851.glb",
    "bl8851.step",
    "bl8851.lbr",
    "docs/hero.png",
    "docs/bl8851-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bl8851-hero.glb",
    "bl8851-hero.overlay.json",
    "bl8851-etched.glb"
  ],
  "component": {
    "mpn": "BL8851",
    "manufacturer": "BL(Shanghai Belling)",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Power Management ICs",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/6b1b048892d3c095cda6559e19db38c1.pdf",
    "parts": {
      "symbol": "bl8851.kicad_sym",
      "footprint": "bl8851.kicad_mod",
      "model_3d": "bl8851-hero.glb",
      "model_3d_plain": "bl8851-etched.glb",
      "model_3d_step": "bl8851-etched.step",
      "model_3d_step_plain": "bl8851.step",
      "lbr": "bl8851.lbr"
    },
    "distributor_links": {
      "lcsc": "C314014"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:06:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the controller."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Feedback input whose voltage level, together with the current-sense signal at pin 4, sets the PWM duty cycle; open-loop voltage 3.9 to 4.2 V and absolute maximum -0.3 to 7 V."
      },
      {
        "number": "3",
        "name": "RT",
        "type": "input",
        "description": "Dual-function pin connected through an NTC resistor to ground for over-temperature shutdown/latch control, or through a Zener to VDD for adjustable over-voltage protection; absolute maximum -0.3 to 7 V."
      },
      {
        "number": "4",
        "name": "CS",
        "type": "input",
        "description": "Current sense input with 220 ns leading edge blanking and 0.75 V internal current limit threshold; absolute maximum -0.3 to 7 V."
      },
      {
        "number": "5",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply input, recommended 10 to 30 V, absolute maximum 40 V DC, with UVLO on at 9 V typ and off at 15.3 V typ."
      },
      {
        "number": "6",
        "name": "GATE",
        "type": "output",
        "description": "Totem-pole gate driver output for the external power MOSFET, clamped at 15 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 7,
        "cost_usd": 0.1071,
        "at": "2026-10-22T21:06:23"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/6b1b048892d3c095cda6559e19db38c1.pdf",
        "pages": 7,
        "sha256": "0553dcea6b39e677",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bl8851.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bl8851-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "668e1286019c9bac34f97a87def0bd8606c9df1fad9ec710cb8fb6944e3a36b4",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}