UC2854ADWTR

{
  "slug": "uc2854adwtr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc2854adwtr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc2854adwtr.kicad_sym",
    "uc2854adwtr.kicad_mod",
    "uc2854adwtr.glb",
    "uc2854adwtr.step",
    "uc2854adwtr.lbr",
    "docs/hero.png",
    "docs/uc2854adwtr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2854adwtr-hero.glb",
    "uc2854adwtr-hero.overlay.json"
  ],
  "component": {
    "mpn": "UC2854ADWTR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16-300mil",
    "pin_count": 16,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/uc3854a",
    "parts": {
      "symbol": "uc2854adwtr.kicad_sym",
      "footprint": "uc2854adwtr.kicad_mod",
      "model_3d": "uc2854adwtr-hero.glb",
      "model_3d_plain": "uc2854adwtr.glb",
      "model_3d_step": "uc2854adwtr-etched.step",
      "model_3d_step_plain": "uc2854adwtr.step",
      "lbr": "uc2854adwtr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2870219",
      "digikey": "296-48792-2-ND",
      "mouser": "595-UC2854ADWTR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T11:25:51Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-48792-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC2854ADWTR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all device voltages; bypass and timing capacitors connected to GND should have leads as short and direct as possible."
      },
      {
        "number": "2",
        "name": "PKLMT",
        "type": "input",
        "description": "Peak limit threshold is 0.0 V, so it connects to the negative voltage on the current sense resistor, optionally offset up to GND with a resistor to REF."
      },
      {
        "number": "3",
        "name": "CAO",
        "type": "output",
        "description": "Output of the wide-bandwidth current amplifier that commands the PWM to force the correct input current; it can swing from 0.1 V to 7.5 V."
      },
      {
        "number": "4",
        "name": "ISENSE",
        "type": "input",
        "description": "Inverting input of the switch current sense amplifier; it remains functional down to and below GND but should not be taken below -0.5 V because it is diode-protected to GND."
      },
      {
        "number": "5",
        "name": "MOUT",
        "type": "bidirectional",
        "description": "Multiplier output and non-inverting current amplifier input; it is a high-impedance current node that should not be taken below -0.5 V, with an output range of -0.3 V to 5.0 V and IMOUT ≤ 2 × IAC."
      },
      {
        "number": "6",
        "name": "IAC",
        "type": "input",
        "description": "Current input to the multiplier proportional to instantaneous line voltage, regulated to a nominal 500 mV, with the maximum current at high line limited to 250 µA for best performance."
      },
      {
        "number": "7",
        "name": "VAO",
        "type": "input",
        "description": "Voltage amplifier output that forms the third input to the multiplier; it is internally clamped to 6.0 V."
      },
      {
        "number": "8",
        "name": "VRMS",
        "type": "input",
        "description": "Input carrying the RMS line voltage to the multiplier, with a linear operating range of 0 V to 5.5 V and an external divider that should produce 1.5 V at low line (85 VAC)."
      },
      {
        "number": "9",
        "name": "VREF",
        "type": "power_out",
        "description": "Internal reference used to set the peak limit point and for various device functions; this voltage must be present for the device to operate."
      },
      {
        "number": "10",
        "name": "ENA",
        "type": "input",
        "description": "Enable input: a nominal voltage above 2.65 V allows operation to begin, the device shuts off below 2.15 V nominal, and the pin is internally clamped to approximately 10 V."
      },
      {
        "number": "11",
        "name": "VSENSE",
        "type": "input",
        "description": "Output feedback input into the voltage error amplifier, whose output is another input to the multiplier circuit."
      },
      {
        "number": "12",
        "name": "RSET",
        "type": "input",
        "description": "A resistor from RSET to ground programs the oscillator charging current; unlike the UC3854, it has no effect on clamping the maximum multiplier output current."
      },
      {
        "number": "13",
        "name": "SS",
        "type": "input",
        "description": "Soft-start pin held at GND while disabled or VCC is low, pulled up over 3 V by an internal 14-µA source when VCC is valid and the device is enabled, and quickly discharged on disable or supply dropout."
      },
      {
        "number": "14",
        "name": "CT",
        "type": "input",
        "description": "Capacitor from CT to GND sets the PWM oscillator frequency."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply rail for the device; the absolute maximum supply voltage is 22 V."
      },
      {
        "number": "16",
        "name": "GTDRV",
        "type": "output",
        "description": "PWM output as a 1.5-A peak totem-pole MOSFET gate driver; a series gate resistor of at least 5 Ω is required to prevent excessive GTDRV overshoot."
      }
    ],
    "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 7 (VAO) is listed as 'I' in the datasheet terminal table, but its description is a voltage ampli; Pins 13 (SS) and 14 (CT) are listed as 'I' in the datasheet terminal table; mapped to input per the ; Pin numbers were taken from the J/N/DW top-view diagram (page 6) and cross-checked against the DW co"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0708,
        "at": "2026-10-11T11:25:36"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/uc3854a",
        "pages": 29,
        "sha256": "20dbe220bdb2dfe8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2854adwtr-etched.step",
        "role": "eda",
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        "origin": "footprint origin = pad-pattern centre",
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        "extents_mm": [
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        "sha256": "0dfcacf6a3eb270cbb05b81bc45376e0c8204ae5bb093a8a54082636a983cf09",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}