UC3844D8TR

{
  "slug": "uc3844d8tr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3844d8tr",
    "factory-2.0.0",
    "extractor-text"
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  "dependencies": {},
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    "path": "docs/hero.png"
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    "uc3844d8tr.step",
    "uc3844d8tr.lbr",
    "docs/hero.png",
    "docs/uc3844d8tr-datasheet.pdf",
    "viewers/symbol.html",
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  "component": {
    "mpn": "UC3844D8TR",
    "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/uc3842",
    "parts": {
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      "footprint": "uc3844d8tr.kicad_mod",
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      "model_3d_plain": "uc3844d8tr.glb",
      "model_3d_step": "uc3844d8tr-etched.step",
      "model_3d_step_plain": "uc3844d8tr.step",
      "lbr": "uc3844d8tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2657919",
      "digikey": "296-47907-2-ND",
      "mouser": "595-UC3844D8TR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T08:32:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-47907-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-UC3844D8TR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier compensation pin. Connect external compensation elements to modify error amplifier output; internal current limiting allows forcing COMP to GROUND externally to control zero duty cycle."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Inverting input of internal error amplifier used to control power converter voltage feedback loop for stability."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Primary side current sensing pin connected to current sense resistor; PWM uses this signal to terminate OUTPUT switch conduction; voltage ramp can be applied for voltage mode control configuration."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "Fixed frequency oscillator setting point; timing resistor RRT connects from this pin to VREF and timing capacitor CCT connects to GROUND to set switching frequency; keep timing capacitor leads as short as possible and directly connected to device GROUND."
      },
      {
        "number": "5",
        "name": "GROUND",
        "type": "power_in",
        "description": "Analog ground. For device packages without PWRGND, GROUND serves as both power ground and analog ground."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Gate driver for external MOSFET; on-chip driver output designed to directly drive MOSFET with peak current up to 1A sourced and sunk; actively held low when VCC is below turn-on threshold."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Analog controller bias input for powering the device; total VCC current equals static VCC current plus average OUTPUT current; requires 0.1µF bypass capacitor directly connected to GROUND with minimal trace length."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "5V reference voltage providing charging current to oscillator timing capacitor through timing resistor; bypass to ground with ceramic capacitor placed close to pin connection; minimum 0.1µF ceramic capacitor required for reference stability."
      }
    ],
    "provenance": {
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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": 38,
        "cost_usd": 0.3092,
        "at": "2026-10-07T08:31:55"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/uc3842",
        "pages": 61,
        "sha256": "0f875fd24cbb5fda",
        "source_tier": "lcsc"
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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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        "checked": "2026-10-07",
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}