LGS4056HEP-4.35

{
  "slug": "lgs4056hep-4-35",
  "version": "0.1.0",
  "type": "component",
  "description": "Legend Si Battery Management, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lgs4056hep-4.35",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lgs4056hep-4-35.kicad_sym",
    "lgs4056hep-4-35.kicad_mod",
    "lgs4056hep-4-35.glb",
    "lgs4056hep-4-35.step",
    "lgs4056hep-4-35.lbr",
    "docs/hero.png",
    "docs/lgs4056hep-4-35-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lgs4056hep-4-35-hero.glb",
    "lgs4056hep-4-35-hero.overlay.json",
    "lgs4056hep-4-35-etched.glb"
  ],
  "component": {
    "mpn": "LGS4056HEP-4.35",
    "manufacturer": "Legend Si",
    "package": "ESOP-8",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756400426168672256",
    "parts": {
      "symbol": "lgs4056hep-4-35.kicad_sym",
      "footprint": "lgs4056hep-4-35.kicad_mod",
      "model_3d": "lgs4056hep-4-35-hero.glb",
      "model_3d_plain": "lgs4056hep-4-35-etched.glb",
      "model_3d_step": "lgs4056hep-4-35-etched.step",
      "model_3d_step_plain": "lgs4056hep-4-35.step",
      "lbr": "lgs4056hep-4-35.lbr"
    },
    "distributor_links": {
      "lcsc": "C20618072"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T19:03:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TEMP",
        "type": "input",
        "description": "Battery temperature detection input connected to the battery NTC; charging is suspended if the voltage is below 45% or above 80% of the input voltage, and the function is disabled when the pin is grounded or floating."
      },
      {
        "number": "2",
        "name": "PROG",
        "type": "passive",
        "description": "Constant-current charge setting pin; a 1% resistor to ground sets the charge current as 1000/R_PROG (A, R in kΩ) above 300 mA or 900/R_PROG below 300 mA, e.g. 1K gives 1 A and 9K gives 0.1 A, and the pin voltage can be used to monitor charge current."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Chip ground, to be connected to the PCB ground plane and the exposed pad."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Power input pin connected to the supply positive terminal; bypass VCC to GND with at least 10 µF effective-value ceramic capacitor placed as close as possible to the pins."
      },
      {
        "number": "5",
        "name": "BAT",
        "type": "power_out",
        "description": "Battery charging output; connect to the battery positive terminal and place at least 10 µF effective-value ceramic capacitor to ground."
      },
      {
        "number": "6",
        "name": "DONE",
        "type": "output",
        "description": "Open-drain full-charge indicator that pulls low when the battery is full to turn on the LED; connect to the LED cathode, or ground it if the indicator is not used."
      },
      {
        "number": "7",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge indicator that pulls low while charging to turn on the LED; connect to the LED cathode, or ground it if the indicator is not used."
      },
      {
        "number": "8",
        "name": "CE",
        "type": "input",
        "description": "Enable input; high level enables charging and low level turns charging off, driven by VCC or an MCU."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 exposed pad is unnumbered on the package drawing (labelled 'EP PAD'); it is listed as 'EP' and i; The page 3 pin arrangement drawing text is garbled in extraction; pin numbers were taken from the Ta; PROG and BAT types are judgment calls: PROG is a resistor-set/monitor pin (passive), and BAT is the ",
          "exposed pad 9 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0872,
        "at": "2026-10-17T19:00:27"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756400426168672256",
        "pages": 16,
        "sha256": "2091f3fed91bac84",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lgs4056hep-4-35.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lgs4056hep-4-35-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.9,
          4.9,
          1.65
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b365e7c2ca9470a7f508c22d599364dd1c6e0342b3ce2cc936695cc3e936c34b",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}