UCC2809PWTR-1

{
  "schema_version": 1,
  "type": "component",
  "slug": "ucc2809pwtr-1",
  "title": "UCC2809PWTR-1",
  "brief": "Texas Instruments AC-DC Controllers & Regulators, TSSOP-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 supply chip",
    "ucc2809pwtr-1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UCC2809PWTR-1",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-8",
    "pin_count": 8,
    "category": "Power Supply Chip",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ucc2809-2",
    "parts": {
      "symbol": "ucc2809pwtr-1.kicad_sym",
      "footprint": "ucc2809pwtr-1.kicad_mod",
      "model_3d": "ucc2809pwtr-1-hero.glb",
      "model_3d_plain": "ucc2809pwtr-1.glb",
      "model_3d_step": "ucc2809pwtr-1-etched.step",
      "model_3d_step_plain": "ucc2809pwtr-1.step",
      "lbr": "ucc2809pwtr-1.lbr"
    },
    "distributor_links": {
      "lcsc": "C702421",
      "digikey": "296-34869-2-ND",
      "mouser": "595-UCC2809PWTR-1"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T04:16:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-34869-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UCC2809PWTR-1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "FB",
        "type": "input",
        "description": "Summing node for current sense feedback, optocoupler voltage feedback and slope compensation, compared against a 1V threshold; an internal 250 on-resistance NMOS discharges external leading-edge-blanking capacitance during PWM off time."
      },
      {
        "number": "2",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start timing capacitor node, charged by an internal 6µA current source; if taken below 0.5V the output driver is inhibited and held low."
      },
      {
        "number": "3",
        "name": "RT1",
        "type": "passive",
        "description": "Connects timing resistor RT1 and sets the oscillator positive ramp time, Tr = 0.74 × (CT + 27pF) × RT1; minimum recommended value is 10kΩ."
      },
      {
        "number": "4",
        "name": "RT2",
        "type": "passive",
        "description": "Connects timing resistor RT2 and sets the oscillator negative ramp time, Tf = 0.74 × (CT + 27pF) × RT2; minimum recommended value is 4.32kΩ."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Reference ground and power ground for all functions of the device."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "High-current power driver output for an N-channel MOSFET, with a minimum series gate resistor of 3.9 recommended and an absolute IOUT limit of -0.4A to 0.8A (tpw < 1µs, duty cycle < 10%)."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Power input, shunt-regulated at 17.5V (absolute maximum VDD 19V), to be bypassed with a 1µF ceramic capacitor."
      },
      {
        "number": "8",
        "name": "REF",
        "type": "power_out",
        "description": "Buffered internal 5V reference output (5.0V typical, 4.75V to 5.25V), to be bypassed with at least a 0.47µF ceramic 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: Pin numbers for the TSSOP-8 (PW) package were taken from the page 2 pin-out, whose text extraction i; The datasheet's Package Option Addendum (page 9) lists UCC2809PWTR-1 with status NRND (not recommend; Units and symbols were dropped in the text extraction (e.g., the ohm symbol on 250 and 3.9, the micr"
        ],
        "pages_sent": 24,
        "cost_usd": 0.1093,
        "at": "2026-10-08T04:16:30"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ucc2809-2",
        "pages": 24,
        "sha256": "7fc852aa75a77966",
        "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": "ucc2809pwtr-1.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "cf28a51742b2e31065e201d1b313207140cbfb49062efd938788f7a310d02738",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ucc2809pwtr-1-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "9521bd057f6808e8986290f44afffe800b4a7666ae4413aec4a059ce86a7227d",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-8",
      "Category": "Power Supply Chip",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ucc2809pwtr-1"
  ],
  "discovery_pitch": "UCC2809PWTR-1 (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": [
    "page.json",
    "README.md",
    "ucc2809pwtr-1.kicad_sym",
    "ucc2809pwtr-1.kicad_mod",
    "ucc2809pwtr-1.glb",
    "ucc2809pwtr-1.step",
    "ucc2809pwtr-1.lbr",
    "docs/hero.png",
    "docs/ucc2809pwtr-1-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ucc2809pwtr-1-hero.glb",
    "ucc2809pwtr-1-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}