UCC28C44QDRQ1

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  "slug": "ucc28c44qdrq1",
  "title": "UCC28C44QDRQ1",
  "brief": "Texas Instruments AC-DC Controllers And Regulators, SOIC-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": [
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    "power management (pmic)",
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  "component": {
    "mpn": "UCC28C44QDRQ1",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/ucc28c44-q1",
    "parts": {
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      "lbr": "ucc28c44qdrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C2866195",
      "digikey": "296-UCC28C44QDRQ1TR-ND",
      "mouser": "595-UCC28C44QDRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T11:12:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-UCC28C44QDRQ1TR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-UCC28C44QDRQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output for loop compensation, internally current limited so zero duty cycle can be commanded by forcing COMP to GND, and it can also serve as a control port across an opto-isolator."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the error amplifier used for voltage-feedback loop stability, with the non-inverting input internally trimmed to 2.5 V ±1%."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Primary-side current sense input to the PWM comparator that terminates OUT conduction, with a typical current sense amplifier gain of 3 V/V and an RC filter that may be required to prevent leading-edge false triggering."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Oscillator timing pin where a resistor from VREF sets the charging current and a capacitor to GND sets the frequency, with TI recommending timing resistors of 1 kΩ to 100 kΩ and timing capacitors of 220 pF to 4.7 nF."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for the output driver stage and the logic-level controller section, which should be kept separate from the high-current gate driver return path."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "Totem-pole gate drive output that directly drives a MOSFET with up to ±1 A peak current, and on the UCC28C44-Q1 its frequency is one-half the oscillator frequency so the duty cycle is limited to below 50%."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Analog controller bias supply input with an absolute maximum of 20 V and no internal clamp, requiring a ceramic bypass capacitor (typically 0.1 µF) connected directly to GND."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "5-V reference output (±1% tolerance) that supplies oscillator timing current and the logic supply, requiring at least 0.1 µF ceramic bypass to GND and not to be pulled to ground to stop switching."
      }
    ],
    "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 lists RT/CT as I/O; it is mapped to KiCad bidirectional here. The pin desc; The datasheet pin table classifies VDD as an analog input (I) rather than a power input, so it is ma; The source text is the Chinese translation (ZHCSK44G) of the TI datasheet, with the English data she"
        ],
        "pages_sent": 11,
        "cost_usd": 0.064,
        "at": "2026-10-11T11:12:14"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/ucc28c44-q1",
        "pages": 49,
        "sha256": "0ab76ce5a6cf1522",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-11",
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        "sha256": "0f8912be215f1f5ace80d6d405717a326d12c6036470d52a806f0ed47488d0c4",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  "discovery_pitch": "UCC28C44QDRQ1 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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