UCC28C51QDRQ1

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  "title": "UCC28C51QDRQ1",
  "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",
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  "component": {
    "mpn": "UCC28C51QDRQ1",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/ucc28c51qdrq1.pdf",
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    "distributor_links": {
      "lcsc": "C20346027",
      "digikey": "296-UCC28C51QDRQ1TR-ND",
      "mouser": "595-UCC28C51QDRQ1"
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    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output providing compensation signal and control port for secondary isolation with internal current limiting to enable zero duty cycle command."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Inverting input to error amplifier with 2.5 V ±1% internally-trimmed noninverting reference for voltage-feedback loop control."
      },
      {
        "number": "3",
        "name": "CS",
        "type": "input",
        "description": "Primary-side current sense input to PWM comparator comparing sensed current against error amplifier signal to control switch conduction termination."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Oscillator timing pin for fixed-frequency operation via external resistor to VREF and capacitor to GND; switching frequency equals half fOSC for UCC28C51-Q1."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return pin for the output driver stage and the logic level controller section."
      },
      {
        "number": "6",
        "name": "OUT",
        "type": "output",
        "description": "MOSFET gate driver output sourcing/sinking 1 A peak current at half fOSC frequency with <50% maximum duty cycle and active-low behavior below UVLO threshold for UCC28C51-Q1."
      },
      {
        "number": "7",
        "name": "VDD",
        "type": "power_in",
        "description": "Analog controller bias input (0-30 V max) providing power to device; requires 0.1 µF bypass capacitor to GND with minimal trace and additional bulk capacitance."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "5-V regulated reference output providing charging current to oscillator timing capacitor through external resistor; requires minimum 0.1 µF ceramic bypass capacitor."
      }
    ],
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        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 12,
        "cost_usd": 0.1313,
        "at": "2026-10-05T22:03:08"
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      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/ucc28c51qdrq1.pdf",
        "pages": 54,
        "sha256": "17e157e3c78ffd7e",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
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    "email": "[email protected]"
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