UC2843BD1

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc2843bd1",
  "title": "UC2843BD1",
  "brief": "STMicroelectronics AC-DC Controllers And Regulators, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "uc2843bd1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC2843BD1",
    "manufacturer": "STMicroelectronics",
    "package": "SO-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952494840299520",
    "parts": {
      "symbol": "uc2843bd1.kicad_sym",
      "footprint": "uc2843bd1.kicad_mod",
      "model_3d": "uc2843bd1-hero.glb",
      "model_3d_plain": "uc2843bd1.glb",
      "model_3d_step": "uc2843bd1-etched.step",
      "model_3d_step_plain": "uc2843bd1.step",
      "lbr": "uc2843bd1.lbr"
    },
    "distributor_links": {
      "lcsc": "C1529977",
      "digikey": "497-14805-5-ND",
      "mouser": "511-UC2843BD1"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T23:26:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-14805-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-UC2843BD1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output, made available for loop compensation, with the error amplifier output sink current rated at 10 mA maximum."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider; the analog inputs (pins 2 and 3) are rated -0.3 V to 5.5 V."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Input receiving a voltage proportional to inductor current, which the PWM uses to terminate output switch conduction; the analog input is rated -0.3 V to 5.5 V and the current-sense maximum input signal is 1 V typical."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin, with resistor RT connected to Vref and capacitor CT to ground to program the oscillator frequency and maximum output duty cycle; operation to 500 kHz is possible."
      },
      {
        "number": "5",
        "name": "GROUND",
        "type": "power_in",
        "description": "Combined control circuitry and power ground, to which all voltages on the device are referenced."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Drives the gate of a power MOSFET directly, sourcing and sinking peak currents of up to 1 A."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply of the control IC, rated at 30 V maximum from a low-impedance source; the supply is self-limiting when Ii is below 30 mA."
      },
      {
        "number": "8",
        "name": "Vref",
        "type": "power_out",
        "description": "Reference output providing a trimmed 5.00 V (4.90 to 5.10 V over temperature for UC384XB; 4.95 to 5.05 V at 25 °C for UC284XB) with up to 50 mA, also supplying charging current for CT through RT."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin types are assigned from each pin's function because the datasheet does not give ERC classes; RT/; The Vref 50 mA source capability is taken from the block diagram label (5V 50mA) rather than a tabul; Datasheet is a single family document (UC2842B/3B/4B/5B). The SO-8 variant UC2843BD1 is listed on pa",
          "1/8 pins cited to the wrong page (name found elsewhere): ['5:GROUND@p2']"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0612,
        "at": "2026-10-07T23:26:17"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952494840299520",
        "pages": 15,
        "sha256": "fedfd7362400f8b3",
        "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": "uc2843bd1.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2843bd1-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "412ee336c89d39bfbccbdc86215114c5487eeaf74a2c12406a70c4c112fd1a95",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "uc2843bd1"
  ],
  "discovery_pitch": "UC2843BD1 (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "uc2843bd1.kicad_sym",
    "uc2843bd1.kicad_mod",
    "uc2843bd1.glb",
    "uc2843bd1.step",
    "uc2843bd1.lbr",
    "docs/hero.png",
    "docs/uc2843bd1-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2843bd1-hero.glb",
    "uc2843bd1-hero.overlay.json"
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  "visibility": {
    "public": true
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}