UC2845BM

{
  "slug": "uc2845bm",
  "version": "0.1.0",
  "type": "component",
  "description": "HGSEMI AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc2845bm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "uc2845bm.kicad_sym",
    "uc2845bm.kicad_mod",
    "uc2845bm.glb",
    "uc2845bm.step",
    "uc2845bm.lbr",
    "docs/hero.png",
    "docs/uc2845bm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2845bm-hero.glb",
    "uc2845bm-hero.overlay.json",
    "uc2845bm-etched.glb"
  ],
  "component": {
    "mpn": "UC2845BM",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602944239701536768",
    "parts": {
      "symbol": "uc2845bm.kicad_sym",
      "footprint": "uc2845bm.kicad_mod",
      "model_3d": "uc2845bm-hero.glb",
      "model_3d_plain": "uc2845bm-etched.glb",
      "model_3d_step": "uc2845bm-etched.step",
      "model_3d_step_plain": "uc2845bm.step",
      "lbr": "uc2845bm.lbr"
    },
    "distributor_links": {
      "lcsc": "C19193450"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T21:58:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "bidirectional",
        "description": "Error amplifier compensation terminal; pulling this pin below two diode drops shuts down the controller and forces the PWM output high until the shutdown condition is removed."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier input (voltage-feedback node) with a recommended input voltage range of 0 to 5.0 V."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current-sense comparator input whose maximum input signal is 1.0 V (typ.), so peak sense current is set as Ismax = 1.0 V / Rs; raising it above 1 V shuts down the output."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "RC oscillator timing input with a recommended voltage range of 0 to 5.0 V and an oscillation frequency range of 100 kHz to 500 kHz."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; the datasheet requires the bypass capacitor to be placed close to pin 5 because of high peak currents when driving capacitive loads."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "PWM totem-pole output for driving an N-channel MOSFET, rated for ±1 A peak output current and 200 mA average output current, and held low when off; pin 6 needs a divider to GND during undervoltage lockout to prevent leakage from turning the power switch on."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply pin with a maximum recommended supply voltage of 28 V and an absolute maximum of 30 V, with start-up current below 0.5 mA and a 34 V (typ.) Zener clamp at 25 mA."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "Internally trimmed 5.00 V (4.95 V to 5.05 V at 25 °C) reference output, capable of sourcing up to 20 mA."
      }
    ],
    "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 pin table marks COMP and RT/CT as 'I/O'; mapped to KiCad class 'bidirectional' as the ; The datasheet lists the orderable part as UC2845BM/TR (SOP-8, tape and reel, 2500 pcs/reel). The req; Pin descriptions combine the page-2 function text with limits stated elsewhere in the datasheet (abs"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0325,
        "at": "2026-10-17T21:56:13"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602944239701536768",
        "pages": 11,
        "sha256": "bf9615dc0d4e1097",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "uc2845bm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2845bm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "786a0c2e6ab41994ea76210cdc0248f3ed4ff7f2edddd62fbb0e2ba34f4eb92a",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}