UC3853DTR

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc3853dtr",
  "title": "UC3853DTR",
  "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": [
    "component",
    "power management (pmic)",
    "uc3853dtr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC3853DTR",
    "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/uc3853",
    "parts": {
      "symbol": "uc3853dtr.kicad_sym",
      "footprint": "uc3853dtr.kicad_mod",
      "model_3d": "uc3853dtr-hero.glb",
      "model_3d_plain": "uc3853dtr.glb",
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      "model_3d_step_plain": "uc3853dtr.step",
      "lbr": "uc3853dtr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2867169",
      "digikey": "296-28973-2-ND",
      "mouser": "595-UC3853DTR"
    },
    "distributor_check": {
      "checked_at": "2026-10-11T11:14:33Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-28973-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC3853DTR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "IAC",
        "type": "input",
        "description": "AC waveform input to the multiplier, a low-impedance input nominally at 2V that accepts a current proportional to input voltage (resistor sized for 500mA at maximum line; absolute maximum input current 1mA)."
      },
      {
        "number": "2",
        "name": "VCC",
        "type": "power_in",
        "description": "Input supply voltage and RMS line-voltage signal to the squarer, operating range 12V to 40V, bypassed with at least a 0.1µF ceramic capacitor."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "output",
        "description": "Gate driver output with 15V clamp for the external power MOSFET, use at least 5 ohm series gate resistor, 0.125A continuous and 0.5A peak drive current."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all voltages, with the VCC bypass capacitor connected as close to this pin as possible."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Voltage amplifier inverting input, overvoltage comparator input and sync input, regulated to a nominal 3V, trips OVP at 5% above nominal, maximum input voltage 5V."
      },
      {
        "number": "6",
        "name": "VCOMP",
        "type": "output",
        "description": "Voltage loop transconductance error amplifier output, compensated with impedance to GND, multiplier output current is zero below 1.5V, maximum voltage 6.2V."
      },
      {
        "number": "7",
        "name": "IMO",
        "type": "bidirectional",
        "description": "Multiplier output current and current amplifier inverting input summing node, avoid going below -0.5V, input resistance should be 3.9k, maximum output current -2mA."
      },
      {
        "number": "8",
        "name": "ICOMP",
        "type": "output",
        "description": "Current loop error amplifier output with 150µA current source class A stage, compensated by impedance between ICOMP and IMO, sinks 20mA maximum and 7.2V maximum voltage."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 11,
        "cost_usd": 0.2903,
        "at": "2026-10-11T11:14:19"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/uc3853",
        "pages": 11,
        "sha256": "b2507c5b7940ba26",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc3853dtr-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": 0,
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        "sha256": "19c1fa4d5692b0e84b406c3ace0fd162a8f2843974bb1de2b63b058595e801e4",
        "checked": "2026-10-11",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "uc3853dtr"
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  "discovery_pitch": "UC3853DTR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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}