UC3844BNG-TUDI

{
  "slug": "uc3844bng-tudi",
  "version": "0.1.0",
  "type": "component",
  "description": "Tudi AC-DC Controllers And Regulators, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3844bng-tudi",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc3844bng-tudi.kicad_sym",
    "uc3844bng-tudi.kicad_mod",
    "uc3844bng-tudi.glb",
    "uc3844bng-tudi.step",
    "uc3844bng-tudi.lbr",
    "docs/hero.png",
    "docs/uc3844bng-tudi-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3844bng-tudi-hero.glb",
    "uc3844bng-tudi-hero.overlay.json",
    "uc3844bng-tudi-etched.glb"
  ],
  "component": {
    "mpn": "UC3844BNG-TUDI",
    "manufacturer": "Tudi",
    "package": "DIP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604436241534771200",
    "parts": {
      "symbol": "uc3844bng-tudi.kicad_sym",
      "footprint": "uc3844bng-tudi.kicad_mod",
      "model_3d": "uc3844bng-tudi-hero.glb",
      "model_3d_plain": "uc3844bng-tudi-etched.glb",
      "model_3d_step": "uc3844bng-tudi-etched.step",
      "model_3d_step_plain": "uc3844bng-tudi.step",
      "lbr": "uc3844bng-tudi.lbr"
    },
    "distributor_links": {
      "lcsc": "C42372726"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T20:21:14Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output for loop compensation; error amp sinks 2 mA min (7 mA typ) and sources 0.5 mA min (1.0 mA typ)."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input (feedback) with a 2.5 V typical input threshold; analog input limited to -0.3 to 5.5 V."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current sense comparator input with 1.0 V typical maximum input signal; analog input limited to -0.3 to 5.5 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin for external RT and CT, setting frequency (52 kHz typical at RT=10 kΩ, CT=3.3 nF) up to 500 kHz."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground and power ground return for the IC and the output stage."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "High-current totem-pole output driving a power MOSFET gate, rated for ±1 A output current."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply with undervoltage lockout (16 V on / 10 V off for UC3844), with an internal 30 V min zener clamp."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "5.0 V reference output (4.9 to 5.1 V) with 1 mA to 20 mA load range and -100 mA minimum short-circuit current."
      }
    ],
    "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: The Tudi datasheet covers the whole UC2842/43/44/45 and UC3842/43/44/45 family. Pins are taken from ; The datasheet draws RT/CT as a single timing node and does not state its direction. 'passive' is an ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 11,
        "cost_usd": 0.1991,
        "at": "2026-10-15T20:21:00"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604436241534771200",
        "pages": 11,
        "sha256": "fa001136cdaccd5a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "uc3844bng-tudi.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc3844bng-tudi-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          9.27,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "718edc67e2d46667a5f03534e59489e3a1c4ad25ab3f47ef84745e273eda4985",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}