UC3845ADTR

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc3845adtr",
  "title": "UC3845ADTR",
  "brief": "Texas Instruments AC-DC Controllers And Regulators, SOIC-14. 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)",
    "uc3845adtr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC3845ADTR",
    "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/uc2845a",
    "parts": {
      "symbol": "uc3845adtr.kicad_sym",
      "footprint": "uc3845adtr.kicad_mod",
      "model_3d": "uc3845adtr-hero.glb",
      "model_3d_plain": "uc3845adtr.glb",
      "model_3d_step": "uc3845adtr-etched.step",
      "model_3d_step_plain": "uc3845adtr.step",
      "lbr": "uc3845adtr.lbr"
    },
    "distributor_links": {
      "lcsc": "C702408",
      "digikey": "296-UC3845ADTR-ND",
      "mouser": "595-UC3845ADTR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T18:51:03Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-UC3845ADTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC3845ADTR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Low-impedance 1 MHz internal error amplifier output, also the input to the peak current limit / PWM comparator, with 80 dB open-loop gain (AVOL); maximum sink current is 6 mA and it is not internally current-limited."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Error amplifier input used to close the converter voltage feedback loop and set stability."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "5",
        "name": "ISENSE",
        "type": "input",
        "description": "Input to the peak current limit / PWM comparator; the maximum peak current-sense signal is internally clamped at 1 V."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "7",
        "name": "RT/CT",
        "type": "input",
        "description": "Internal oscillator timing input programmed with external RT and CT; TI recommends CT of 470 pF to 4.7 nF and RT of 5 kΩ to 100 kΩ."
      },
      {
        "number": "8",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground and gate-driver return path, allowing a star-ground layout that keeps gate-driver return current away from the signal GND pin."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Controller signal ground."
      },
      {
        "number": "10",
        "name": "OUTPUT",
        "type": "output",
        "description": "1 A totem-pole gate driver output that can source and sink up to 1 A; a gate driver resistor must be used to limit gate-driver current."
      },
      {
        "number": "11",
        "name": "VC",
        "type": "input",
        "description": "Gate driver bias input; a bias capacitor at least 10 times the gate capacitance of the main switching FET must be placed on this pin."
      },
      {
        "number": "12",
        "name": "VCC",
        "type": "power_in",
        "description": "Gate driver bias supply input (recommended VCC minimum 11 V, absolute maximum 30 V); a bias capacitor at least 10 times the gate capacitance of the main switching FET must be placed on this pin."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "14",
        "name": "VREF",
        "type": "power_in",
        "description": "PWM controller voltage reference output that must supply no more than 10 mA in normal operation, is short-circuit protected at about 100 mA, and requires a 1 µF high-frequency bypass capacitor."
      }
    ],
    "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: Datasheet pin-number mapping for the SOIC-14 (D) variant was taken from Table 4-1 (page 4). The text; Table 4-1 lists VCC and VC as type 'I' (input). VCC is set to power_in here because it is the supply; UC3845ADTR is confirmed as the SOIC (D), 14-pin, 2500-piece T&R orderable part in the package option"
        ],
        "pages_sent": 27,
        "cost_usd": 0.1437,
        "at": "2026-10-11T18:50:47"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/uc2845a",
        "pages": 54,
        "sha256": "1f5ad8805f414728",
        "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"
    },
    "models_3d": [
      {
        "file": "uc3845adtr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3b9a775da256c8afcc28dcddfbc2eb3f266107fe61ce8446d96f2c52b6f44a70",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc3845adtr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          8.7,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4edea903a0a34136e74f284edaee1464497e95fe3084bf4cb42379520c229213",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-14",
      "Category": "Power Management (PMIC)",
      "Pins": "14"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "uc3845adtr"
  ],
  "discovery_pitch": "UC3845ADTR (Texas Instruments) 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",
    "uc3845adtr.kicad_sym",
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    "uc3845adtr.glb",
    "uc3845adtr.step",
    "uc3845adtr.lbr",
    "docs/hero.png",
    "docs/uc3845adtr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3845adtr-hero.glb",
    "uc3845adtr-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}