UC3844DTR

{
  "slug": "uc3844dtr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3844dtr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc3844dtr.kicad_sym",
    "uc3844dtr.kicad_mod",
    "uc3844dtr.glb",
    "uc3844dtr.step",
    "uc3844dtr.lbr",
    "docs/hero.png",
    "docs/uc3844dtr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3844dtr-hero.glb",
    "uc3844dtr-hero.overlay.json"
  ],
  "component": {
    "mpn": "UC3844DTR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-14",
    "pin_count": 14,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/uc3842",
    "parts": {
      "symbol": "uc3844dtr.kicad_sym",
      "footprint": "uc3844dtr.kicad_mod",
      "model_3d": "uc3844dtr-hero.glb",
      "model_3d_plain": "uc3844dtr.glb",
      "model_3d_step": "uc3844dtr-etched.step",
      "model_3d_step_plain": "uc3844dtr.step",
      "lbr": "uc3844dtr.lbr"
    },
    "distributor_links": {
      "lcsc": 702407,
      "digikey": "296-46262-2-ND",
      "mouser": "595-UC3844DTR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T20:10:37Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-46262-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC3844DTR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier compensation output with internal current limiting; external connection to GROUND forces zero duty cycle."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "3",
        "name": "VFB",
        "type": "input",
        "description": "Inverting input to error amplifier; used for output voltage regulation feedback control with input voltage 2.5V typical."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "5",
        "name": "ISENSE",
        "type": "input",
        "description": "Current sense input to PWM comparator with 3V/V gain; maximum input signal 1V at 5V COMP voltage."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "7",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Oscillator timing pin for frequency setting with external RC network; switching frequency fOSC = 1.72 / (RRT × CCT) Hz with timing resistor 5-100kΩ and capacitor 1-100nF."
      },
      {
        "number": "8",
        "name": "PWRGND",
        "type": "power_in",
        "description": "Power ground return for high-current gate driver output stage; separate from signal ground GROUND in 14-pin packages."
      },
      {
        "number": "9",
        "name": "GROUND",
        "type": "power_in",
        "description": "Signal and analog ground for error amplifier and current detection circuits; serves as power and signal ground where PWRGND unavailable."
      },
      {
        "number": "10",
        "name": "OUTPUT",
        "type": "output",
        "description": "Totem-pole gate driver output capable of sourcing and sinking peak current up to 1A to directly drive N-channel MOSFET; actively held low when VCC below UVLO threshold."
      },
      {
        "number": "11",
        "name": "VC",
        "type": "power_in",
        "description": "Gate driver bias supply input for totem-pole output stage (14-pin packages only); requires bypass capacitor minimum 10× main switch MOSFET gate capacitance."
      },
      {
        "number": "12",
        "name": "VCC",
        "type": "power_in",
        "description": "Main analog controller bias supply input voltage 12-28V recommended; total current equals static quiescent current plus average OUTPUT current (IOUTPUT = Qg × fSW)."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection."
      },
      {
        "number": "14",
        "name": "VREF",
        "type": "power_in",
        "description": "Internal precision 5V reference voltage output with ±2% tolerance for UC284x or ±1.8% for UC384x; requires 0.1µF minimum ceramic bypass capacitor with maximum short-circuit current ±30-180mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: VC pin (11) is only present in 14-pin SOIC and CFP packages, not in 8-pin packages; confirmed correc"
        ],
        "pages_sent": 38,
        "cost_usd": 0.3393,
        "at": "2026-10-05T20:10:22"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/uc3842",
        "pages": 61,
        "sha256": "0f875fd24cbb5fda",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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}