UC3854BN

{
  "slug": "uc3854bn",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers And Regulators, PDIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3854bn",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "uc3854bn.kicad_mod",
    "uc3854bn.glb",
    "uc3854bn.step",
    "uc3854bn.lbr",
    "docs/hero.png",
    "docs/uc3854bn-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3854bn-hero.glb",
    "uc3854bn-hero.overlay.json",
    "uc3854bn-etched.glb"
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  "component": {
    "mpn": "UC3854BN",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-16",
    "pin_count": 16,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/cn/lit/gpn/uc3854a",
    "parts": {
      "symbol": "uc3854bn.kicad_sym",
      "footprint": "uc3854bn.kicad_mod",
      "model_3d": "uc3854bn-hero.glb",
      "model_3d_plain": "uc3854bn-etched.glb",
      "model_3d_step": "uc3854bn-etched.step",
      "model_3d_step_plain": "uc3854bn.step",
      "lbr": "uc3854bn.lbr"
    },
    "distributor_links": {
      "lcsc": "C2861852",
      "digikey": "296-11311-5-ND",
      "mouser": "595-UC3854BN"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T10:16:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-11311-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC3854BN",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "All bypass and timing capacitors connected to GND should have leads as short and direct as possible, and all voltages are measured with respect to GND."
      },
      {
        "number": "2",
        "name": "PKLMT",
        "type": "input",
        "description": "The peak limit threshold is 0.0 V, so this pin connects to the negative voltage on the current sense resistor, with a resistor to REF used to offset that signal up to GND."
      },
      {
        "number": "3",
        "name": "CAO",
        "type": "output",
        "description": "Output of the wide-bandwidth current amplifier, which commands the PWM to force the correct input current and can swing from 0.1 V to 7.5 V."
      },
      {
        "number": "4",
        "name": "ISENSE",
        "type": "input",
        "description": "Inverting input of the current amplifier for switch current sensing; 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, which should not be taken below -0.5 V and must satisfy IMOUT ≤ 2 × IAC."
      },
      {
        "number": "6",
        "name": "IAC",
        "type": "input",
        "description": "Current input to the multiplier proportional to instantaneous line voltage, where the maximum current at high line should be 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 and is internally clamped to 6.0 V."
      },
      {
        "number": "8",
        "name": "VRMS",
        "type": "input",
        "description": "Input providing the RMS voltage to the multiplier, with a linear operating range of 0 V to 5.5 V and a 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, which must be present for the device to operate."
      },
      {
        "number": "10",
        "name": "ENA",
        "type": "input",
        "description": "Enable input where a nominal voltage above 2.65 V allows operation and the device shuts off below 2.15 V nominal; the pin is internally clamped to approximately 10 V."
      },
      {
        "number": "11",
        "name": "VSENSE",
        "type": "input",
        "description": "Feedback input from the output that goes into the voltage error amplifier, whose output is another input to the multiplier."
      },
      {
        "number": "12",
        "name": "RSET",
        "type": "input",
        "description": "A resistor from RSET to ground programs the oscillator charging current and the multiplier limit."
      },
      {
        "number": "13",
        "name": "SS",
        "type": "input",
        "description": "Soft-start pin that is pulled up to over 3 V by an internal 14 µA source when VCC is valid and the device is enabled, and quickly discharges to ground on disable or supply dropout."
      },
      {
        "number": "14",
        "name": "CT",
        "type": "input",
        "description": "A capacitor from CT to GND sets the PWM oscillator frequency."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply rail for the device."
      },
      {
        "number": "16",
        "name": "GTDRV",
        "type": "output",
        "description": "PWM output as a 1.5-A peak totem-pole MOSFET gate driver, where a series gate resistor of at least 5 Ω should be used to limit 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: The PDIP-16 (N) package is confirmed for UC3854BN in the ordering and package addendum tables (pages; The datasheet lists VAO as 'I' in the terminal table but describes it as the voltage amplifier outpu; MOUT is listed as I/O in the terminal table and is recorded as bidirectional; it is a current output"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0708,
        "at": "2026-10-16T10:15:53"
      },
      "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
      }
    },
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        "seat": "body on z = 0, through-hole leads below",
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        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "bc7fd78834262c94ad13f6a0a12a203a29a4310d6f58ecdf3d4a6cd8d5778b72",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}