UCC28500DW

{
  "schema_version": 1,
  "type": "component",
  "slug": "ucc28500dw",
  "title": "UCC28500DW",
  "brief": "Texas Instruments AC-DC Controllers And Regulators, SOIC-20-300mil. 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)",
    "ucc28500dw",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "UCC28500DW",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ucc38503",
    "parts": {
      "symbol": "ucc28500dw.kicad_sym",
      "footprint": "ucc28500dw.kicad_mod",
      "model_3d": "ucc28500dw-hero.glb",
      "model_3d_plain": "ucc28500dw.glb",
      "model_3d_step": "ucc28500dw-etched.step",
      "model_3d_step_plain": "ucc28500dw.step",
      "lbr": "ucc28500dw.lbr"
    },
    "distributor_links": {
      "lcsc": "C2859883",
      "digikey": "2156-UCC28500DW-ND",
      "mouser": "595-UCC28500DW"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T23:10:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-UCC28500DW-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UCC28500DW",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VAOUT",
        "type": "output",
        "description": "Voltage amplifier output that regulates the output voltage and is internally limited to approximately 5.5 V to prevent overshoot."
      },
      {
        "number": "2",
        "name": "RT",
        "type": "passive",
        "description": "Oscillator charging-current programming pin; a resistor from RT to GND sets the charging current, with 10 kΩ to 100 kΩ recommended and a nominal pin voltage of 3 V."
      },
      {
        "number": "3",
        "name": "VSENSE",
        "type": "input",
        "description": "Inverting input of the voltage amplifier, normally connected to the compensation network and to the boost output through a divider network."
      },
      {
        "number": "4",
        "name": "OVP/ENBL",
        "type": "input",
        "description": "Window-comparator input that disables the PFC driver if the boost output is 6.67% above nominal, disables both drivers and resets SS2 if pulled below 1.9 V, and sets the active range of the second-stage PWM."
      },
      {
        "number": "5",
        "name": "CT",
        "type": "passive",
        "description": "Oscillator timing capacitor pin; a capacitor from CT to GND, with RT, sets the oscillator frequency, and its return lead should be as short as possible."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all voltages; VCC and VREF should be bypassed directly to GND with a 0.1 µF or larger ceramic capacitor."
      },
      {
        "number": "7",
        "name": "VERR",
        "type": "input",
        "description": "Error-signal input for the second stage, driven by an external amplifier, with an internal 4.5 V clamp that limits GT2 to less than 50% duty cycle."
      },
      {
        "number": "8",
        "name": "ISENSE2",
        "type": "input",
        "description": "Second-stage current-sense input, fed by a resistor from the lower FET source to ground, which may also sum the oscillator ramp for slope compensation."
      },
      {
        "number": "9",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, to be connected to at least 20 mA between 12 V and 17 V for normal operation, bypassed directly to GND, and with outputs inhibited unless VCC exceeds the upper UVLO threshold."
      },
      {
        "number": "10",
        "name": "GT2",
        "type": "output",
        "description": "Totem-pole MOSFET gate-drive output for the second stage, limited to a 50% maximum duty cycle."
      },
      {
        "number": "11",
        "name": "PWRGND",
        "type": "power_in",
        "description": "Ground return for the totem-pole output drivers."
      },
      {
        "number": "12",
        "name": "GT1",
        "type": "output",
        "description": "Totem-pole MOSFET gate-drive output for the PFC stage, which requires a series gate resistor of at least 10.5 Ω to limit overshoot."
      },
      {
        "number": "13",
        "name": "SS2",
        "type": "passive",
        "description": "Soft-start pin for the second-stage PWM, charged by an external capacitor through a current source and quickly discharged on a disable command or UVLO2 dropout."
      },
      {
        "number": "14",
        "name": "PKLMT",
        "type": "input",
        "description": "PFC peak current-limit input with a 0 V threshold, where a level-shift divider from the current-sense resistor to VREF sets the overcurrent level."
      },
      {
        "number": "15",
        "name": "CAOUT",
        "type": "output",
        "description": "Output of the wide-bandwidth current amplifier that commands the PFC PWM duty cycle and can swing close to GND to allow zero duty cycle."
      },
      {
        "number": "16",
        "name": "ISENSE1",
        "type": "input",
        "description": "Non-inverting input of the current amplifier, which remains functional down to and below GND."
      },
      {
        "number": "17",
        "name": "MOUT",
        "type": "input",
        "description": "Multiplier output and inverting input of the current amplifier, a high-impedance node to which current-loop compensation connects between MOUT and CAOUT."
      },
      {
        "number": "18",
        "name": "IAC",
        "type": "input",
        "description": "Analog multiplier current input used to sense instantaneous line voltage, with a recommended maximum of 500 µA."
      },
      {
        "number": "19",
        "name": "VFF",
        "type": "output",
        "description": "RMS feed-forward signal generated by mirroring one-half of IAC into a single-pole external filter, which should be 1.4 V at low line."
      },
      {
        "number": "20",
        "name": "VREF",
        "type": "power_out",
        "description": "Accurate 7.5 V reference output capable of supplying 10 mA to peripheral circuitry, internally short-circuit current limited, and bypassed to GND with 0.1 µF or larger ceramic."
      }
    ],
    "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 for RT, CT, SS2, MOUT and VFF are not stated as ERC classes in the datasheet; they were as; Pin numbers were taken from the DW top-view listing on page 2 and cross-checked against the block di; The page 27 package addendum lists UCC28500DW with status NRND (not recommended for new designs). Th"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0921,
        "at": "2026-10-08T23:09:50"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ucc38503",
        "pages": 36,
        "sha256": "5eaadcc6a0fa5e00",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "95a0ed7b859ad697cf67d9f44ca8395ddcf808dfdfc699000b623acc043a37c2",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-20-300mil",
      "Category": "Power Management (PMIC)",
      "Pins": "20"
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  "discovery_pitch": "UCC28500DW (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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