CN3085

{
  "schema_version": 1,
  "type": "component",
  "slug": "cn3085",
  "title": "CN3085",
  "brief": "ShangHai Consonance Elec Battery Management, SOP-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "cn3085"
  ],
  "component": {
    "mpn": "CN3085",
    "manufacturer": "ShangHai Consonance Elec",
    "package": "SOP-8-EP",
    "pin_count": 9,
    "category": "PMIC",
    "subcategory": "Battery Management",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/865023591f894251be41442c55a28620.pdf",
    "parts": {
      "symbol": "cn3085.kicad_sym",
      "footprint": "cn3085.kicad_mod",
      "model_3d": "cn3085-etched.glb",
      "model_3d_plain": "cn3085.glb",
      "model_3d_step": "cn3085-etched.step",
      "model_3d_step_plain": "cn3085.step",
      "lbr": "cn3085.lbr"
    },
    "distributor_links": {
      "lcsc": "C93054"
    },
    "pins": [
      {
        "number": "1",
        "name": "TEMP",
        "type": "input",
        "description": "Battery temperature monitoring input. Connect to the output of an NTC divider tied to the battery. Charging is suspended (battery fault) when V(TEMP) is <45% or >80% of VIN. Tie TEMP to GND to disable temperature monitoring. Input current is <=0.5uA."
      },
      {
        "number": "2",
        "name": "ISET",
        "type": "input",
        "description": "Constant-charge-current programming pin. Connect a resistor RISET from ISET to GND; ICH = 1218V / RISET. V(ISET) is regulated to 0.12V in trickle, 1.205V in CC, and 0.72V in maintenance modes."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / power return."
      },
      {
        "number": "4",
        "name": "VIN",
        "type": "power_in",
        "description": "Positive input supply, 3.8V to 6V typical (absolute max 6.5V). Powers the internal circuitry and the pass transistor to BAT. When VIN-VBAT < 10mV, CN3085 enters sleep mode with BAT current <3uA. UVLO threshold ~3.2V (rising)."
      },
      {
        "number": "5",
        "name": "BAT",
        "type": "power_out",
        "description": "Battery connection / charge output. Sources charge current (up to 1A) to the battery positive terminal via the internal PMOS pass transistor. In sleep mode BAT sink current is <3uA. Requires 4.7uF-10uF cap from BAT to GND for stability."
      },
      {
        "number": "6",
        "name": "RC",
        "type": "passive",
        "description": "Maintenance-charge timer program pin. External R (R5, 20k-5M) and C (C1, >1nF) set the maintenance charge time: T(s) = 2654*R5*C1 + 4980*C1*1e3. When the timer expires, charging ends."
      },
      {
        "number": "7",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status indicator (active-low). Pulled low during trickle, constant-current and maintenance charging; high-Z otherwise (including battery-fault or no-battery states). Sink capability 10mA at V(CHRG)=0.3V; leakage <=1uA at 5.5V. Typically drives an LED to VIN through a series resistor."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Battery-voltage feedback input. Battery voltage is fed back via R3/R4 divider such that VBAT = VFB * (1 + R3/R4). FB thresholds: VMAX=1.205V (CC ceiling), VCCT=1.083V (CC termination, ~90% of max), VPRE=0.843V (trickle threshold, ~70% of max), VRECH=1.052V (auto-recharge, ~87.3% of max)."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "power_in",
        "description": "Exposed thermal pad on the underside of the SOP-8-PP package. Solder to the PCB ground copper plane for heat dissipation; required for full charge-current capability.",
        "source": "renumbered-to-footprint-pad"
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/865023591f894251be41442c55a28620.pdf",
        "pages": 13,
        "sha256": "424ad4101ca2b6d3",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm@sha256:5848244c5e72002e",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "cn3085.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cn3085-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "dd60a8dabc381c03a4f4472bc4cc86e9aff208b9b9a131b923554c64e088589b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ShangHai Consonance Elec",
      "Package": "SOP-8-EP",
      "Category": "PMIC",
      "Pins": "9"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cn3085"
  ],
  "discovery_pitch": "CN3085 (ShangHai Consonance Elec) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cn3085.kicad_sym",
    "cn3085.kicad_mod",
    "cn3085.glb",
    "cn3085.step",
    "cn3085-etched.step",
    "cn3085.lbr",
    "docs/hero.png",
    "docs/cn3085-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "variants": [
    {
      "mpn": "CN3085",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T19:20:06.107Z"
}