UC2843BM

{
  "slug": "uc2843bm",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc2843bm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc2843bm.kicad_sym",
    "uc2843bm.kicad_mod",
    "uc2843bm.glb",
    "uc2843bm.step",
    "uc2843bm.lbr",
    "docs/hero.png",
    "docs/uc2843bm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2843bm-hero.glb",
    "uc2843bm-hero.overlay.json",
    "uc2843bm-etched.glb"
  ],
  "component": {
    "mpn": "UC2843BM",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602944236740358144",
    "parts": {
      "symbol": "uc2843bm.kicad_sym",
      "footprint": "uc2843bm.kicad_mod",
      "model_3d": "uc2843bm-hero.glb",
      "model_3d_plain": "uc2843bm-etched.glb",
      "model_3d_step": "uc2843bm-etched.step",
      "model_3d_step_plain": "uc2843bm.step",
      "lbr": "uc2843bm.lbr"
    },
    "distributor_links": {
      "lcsc": "C19193446"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T02:20:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "bidirectional",
        "description": "Error amplifier compensation node; the error amplifier can sink up to 10 mA (absolute maximum rating), and pulling this pin below two diode drops shuts the controller down."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input, regulated to a 2.5 V reference (VI(EA) 2.42 V to 2.58 V) with input bias current of -0.1 µA typical and -2 µA maximum."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current-sense comparator input with a maximum input signal of 0.9 V to 1.1 V (1 V typical) and an analog input absolute range of -0.3 V to +5.5 V; raising it above 1 V shuts the output off."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "RC oscillator timing input, with a recommended switching frequency range of 100 kHz to 500 kHz and an oscillator amplitude of about 1.6 V peak-to-peak."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; the supply bypass capacitor should be placed close to this pin to handle high peak currents from capacitive loads."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "PWM totem-pole output for driving an N-channel MOSFET, held low when off, with output current limited to ±1 A (absolute maximum) and 200 mA average; it is driven to high impedance during undervoltage lockout and needs a divider to GND to prevent leakage from turning on the power switch."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply pin with a recommended maximum of 28 V (absolute maximum 30 V), a startup current below 0.5 mA, and a 34 V typical Zener clamp at 25 mA."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "Internally trimmed 5.00 V reference output (4.95 V to 5.05 V at 1 mA, 25 °C) with a maximum reference output current of -20 mA."
      }
    ],
    "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: The datasheet pin table marks GND and VCC I/O as '/' (no direction given); types were assigned as po; The pinout is a single figure shared by DIP-8 and SOP-8 on page 2. The ordering table lists UC2843BM"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0425,
        "at": "2026-10-19T02:17:48"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602944236740358144",
        "pages": 11,
        "sha256": "2c475c66553f62aa",
        "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": "uc2843bm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2843bm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1a4d0bae579c58f5980eccbd52b21dee2f99bd0a1c1b332f6f9cfab9b8e5746b",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}