UC3872DW

{
  "slug": "uc3872dw",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Lighting Drivers & Controllers, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "led drivers",
    "uc3872dw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "uc3872dw.kicad_sym",
    "uc3872dw.kicad_mod",
    "uc3872dw.glb",
    "uc3872dw.step",
    "uc3872dw.lbr",
    "docs/hero.png",
    "docs/uc3872dw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3872dw-hero.glb",
    "uc3872dw-hero.overlay.json"
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  "component": {
    "mpn": "UC3872DW",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16-300mil",
    "pin_count": 16,
    "category": "LED Drivers",
    "subcategory": "Lighting Drivers & Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/uc2872",
    "parts": {
      "symbol": "uc3872dw.kicad_sym",
      "footprint": "uc3872dw.kicad_mod",
      "model_3d": "uc3872dw-hero.glb",
      "model_3d_plain": "uc3872dw.glb",
      "model_3d_step": "uc3872dw-etched.step",
      "model_3d_step_plain": "uc3872dw.step",
      "lbr": "uc3872dw.lbr"
    },
    "distributor_links": {
      "lcsc": "C1519159",
      "digikey": "296-11328-5-ND",
      "mouser": "595-UC3872DW"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T03:29:57Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-11328-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC3872DW",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BOUT",
        "type": "output",
        "description": "Push-pull N-channel MOSFET drive output, complementary to AOUT, high 50% of the time and switching states on each zero-detect."
      },
      {
        "number": "2",
        "name": "AOUT",
        "type": "output",
        "description": "Push-pull N-channel MOSFET drive output, complementary to BOUT, high 50% of the time and switching states on each zero-detect."
      },
      {
        "number": "3",
        "name": "VC",
        "type": "power_in",
        "description": "Power supply for the output drivers (absolute max 24V); bypass to ground with a 0.1µF ceramic capacitor."
      },
      {
        "number": "4",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output; compensation components connect between COMP and INV, and a capacitor to ground limits turn-on current and blanks open lamp detect so the lamp can start."
      },
      {
        "number": "5",
        "name": "SS",
        "type": "passive",
        "description": "Soft start pin that limits initial turn-on currents and blanks open lamp detect until soft start completes (soft start threshold 2.9 to 3.8V)."
      },
      {
        "number": "6",
        "name": "N/C",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "7",
        "name": "INV",
        "type": "input",
        "description": "Inverting input of the error amplifier and input to the open lamp detect circuit; outputs are disabled if INV is below the 1V open lamp detect threshold."
      },
      {
        "number": "8",
        "name": "CT",
        "type": "passive",
        "description": "Timing capacitor to GND sets the synchronization frequency range; charged with approximately 200µA to form the ramp for the COUT PWM comparator."
      },
      {
        "number": "9",
        "name": "ZD",
        "type": "input",
        "description": "Zero-detect input sensing the transformer primary center-tap voltage with a threshold of about 0.5V; connect through a resistor (typically 10k) to limit input current at turn-off."
      },
      {
        "number": "10",
        "name": "N/C",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "11",
        "name": "REF",
        "type": "power_out",
        "description": "3V reference output for internal logic; bypass to ground with a 0.01µF ceramic capacitor."
      },
      {
        "number": "12",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply for the chip, operating range 4.2V to 24V; bypass to ground with a 0.1µF ceramic capacitor."
      },
      {
        "number": "13",
        "name": "ENBL",
        "type": "input",
        "description": "Enable input: high enables the device, low shuts the IC down to typically 1µA supply current (input high threshold 2V, low threshold 0.8V)."
      },
      {
        "number": "14",
        "name": "COUT",
        "type": "output",
        "description": "Directly drives the bulk regulator P-channel MOSFET, synchronized to each zero-detect at twice the AOUT/BOUT frequency, with smooth control up to 100% duty cycle."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "High-current ground connection for the three output drivers."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference point for the internal reference and all thresholds."
      }
    ],
    "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": [
          "extractor flagged: Pin numbers taken from the SOIC-16/SSOP-16 (DW, M) connection diagram on page 2. The block diagram p",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.3701,
        "at": "2026-10-08T03:29:41"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/uc2872",
        "pages": 12,
        "sha256": "4f021ba16ffe9cab",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": -0.0,
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        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
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        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "a295d7c62ebdaa7708594ccef5db9925627562b9d2a2cc4cbb047407da37f436",
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  }
}