UCC2818DW

{
  "slug": "ucc2818dw",
  "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)",
    "ucc2818dw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "ucc2818dw.kicad_sym",
    "ucc2818dw.kicad_mod",
    "ucc2818dw.glb",
    "ucc2818dw.step",
    "ucc2818dw.lbr",
    "docs/hero.png",
    "docs/ucc2818dw-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ucc2818dw-hero.glb",
    "ucc2818dw-hero.overlay.json"
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  "component": {
    "mpn": "UCC2818DW",
    "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/ucc2818",
    "parts": {
      "symbol": "ucc2818dw.kicad_sym",
      "footprint": "ucc2818dw.kicad_mod",
      "model_3d": "ucc2818dw-hero.glb",
      "model_3d_plain": "ucc2818dw.glb",
      "model_3d_step": "ucc2818dw-etched.step",
      "model_3d_step_plain": "ucc2818dw.step",
      "lbr": "ucc2818dw.lbr"
    },
    "distributor_links": {
      "lcsc": "C2860798",
      "digikey": "2156-UCC2818DW-ND",
      "mouser": "595-UCC2818DW"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T21:31:26Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-UCC2818DW-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UCC2818DW",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "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": "2",
        "name": "PKLMT",
        "type": "input",
        "description": "PFC peak current limit threshold is 0 V, reached when PKLMT falls below 0 V, with an absolute maximum input voltage of 5 V and maximum input current of 10 mA."
      },
      {
        "number": "3",
        "name": "CAOUT",
        "type": "output",
        "description": "Output of a wide-bandwidth current amplifier that commands the PFC PWM duty cycle, with compensation components placed between CAOUT and MOUT."
      },
      {
        "number": "4",
        "name": "CAI",
        "type": "input",
        "description": "Noninverting input of the current amplifier, connected through a resistor to the GND side of the current sense resistor, remaining functional down to and below GND, with an absolute maximum input voltage of 8 V."
      },
      {
        "number": "5",
        "name": "MOUT",
        "type": "bidirectional",
        "description": "Multiplier output and current amplifier inverting input, with the multiplier output current limited to 2 × IIAC and an absolute maximum input voltage of 8 V and minimum voltage of −0.5 V."
      },
      {
        "number": "6",
        "name": "IAC",
        "type": "input",
        "description": "Input current proportional to instantaneous line voltage for the analog multiplier, with a recommended maximum IIAC of 500 µA and an absolute maximum input current of 10 mA."
      },
      {
        "number": "7",
        "name": "VAOUT",
        "type": "output",
        "description": "Voltage amplifier output that regulates output voltage, internally limited to approximately 5.5 V to prevent overshoot."
      },
      {
        "number": "8",
        "name": "VFF",
        "type": "input",
        "description": "Feed-forward voltage, the RMS signal produced by mirroring one-half of IIAC into a single-pole external filter, which should be 1.4 V at low line."
      },
      {
        "number": "9",
        "name": "VREF",
        "type": "power_out",
        "description": "Output of an accurate 7.5-V reference capable of delivering 20 mA to peripheral circuitry, internally short-circuit current-limited, and held at 0 V when VCC is below the UVLO threshold; bypass with 0.1 µF or larger."
      },
      {
        "number": "10",
        "name": "OVP/EN",
        "type": "input",
        "description": "Window comparator input that disables the output driver on output overvoltage, and disables the driver and resets SS when pulled below 1.9 V (typical), with an absolute maximum input voltage of 10 V."
      },
      {
        "number": "11",
        "name": "VSENSE",
        "type": "input",
        "description": "Voltage amplifier inverting input, normally connected to a compensation network and to the boost output through a divider, with an absolute maximum input voltage of 10 V and recommended sense voltage of 7.5 V to 10 V."
      },
      {
        "number": "12",
        "name": "RT",
        "type": "input",
        "description": "Oscillator charging current programming pin, where a resistor between 10 kΩ and 100 kΩ to GND is recommended, with a nominal voltage of 3 V on this pin."
      },
      {
        "number": "13",
        "name": "SS",
        "type": "input",
        "description": "Soft-start pin charged by a current source to slowly increase the PWM duty cycle during start-up, discharged when VCC is low, with an absolute maximum input voltage of 8 V."
      },
      {
        "number": "14",
        "name": "CT",
        "type": "input",
        "description": "Oscillator timing capacitor connected to GND, setting the PWM oscillator frequency as f ≈ 0.6/(RT × CT), with its lead to GND kept as short and direct as possible."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, to be connected to a stable source of at least 20 mA between 10 V and 17 V for normal operation, with an absolute maximum supply voltage of 18 V and bypassed directly to GND."
      },
      {
        "number": "16",
        "name": "DRVOUT",
        "type": "output",
        "description": "Totem-pole gate drive output for the boost switch, which should use a series gate resistor to limit overshoot, with absolute maximum gate drive current of 1.2 A and 0.2 A continuous."
      }
    ],
    "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: The datasheet's pin table is shared across the D, DW, N and PW packages, so the DW pinout is inferre; KiCad types are mapped by judgment: the datasheet labels pins only as I, O or I/O. VCC is mapped to ; Internal inconsistency in the datasheet: the VREF pin table and electrical text give 7.5 V, while Se"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0828,
        "at": "2026-10-10T21:31:10"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ucc2818",
        "pages": 46,
        "sha256": "ca94b4ec262a1f44",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ucc2818dw-etched.step",
        "role": "eda",
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        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}