CN3722

{
  "schema_version": 1,
  "type": "component",
  "slug": "cn3722",
  "title": "CN3722",
  "brief": "ShangHai Consonance Elec Battery Management, TSSOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "cn3722"
  ],
  "component": {
    "mpn": "CN3722",
    "manufacturer": "ShangHai Consonance Elec",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "PMIC",
    "subcategory": "Battery Management",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e09b267b1b044776b539c00c1c147bff.pdf",
    "parts": {
      "symbol": "cn3722.kicad_sym",
      "footprint": "cn3722.kicad_mod",
      "model_3d": "cn3722-etched.glb",
      "model_3d_plain": "cn3722.glb",
      "model_3d_step": "cn3722-etched.step",
      "model_3d_step_plain": "cn3722.step",
      "lbr": "cn3722.lbr"
    },
    "distributor_links": {
      "lcsc": "C77905"
    },
    "pins": [
      {
        "number": "1",
        "name": "VG",
        "type": "power_out",
        "description": "Internal LDO regulator output that powers the internal gate-driver circuitry. Connect a 100 nF decoupling capacitor between VG and VCC."
      },
      {
        "number": "2",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the gate driver."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground reference for the control circuitry."
      },
      {
        "number": "4",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status indicator (active low). Internal transistor pulls this pin low during trickle-charge, constant-current, and constant-voltage charging; otherwise high-impedance. Rated up to 30 V, sink 12 mA typ."
      },
      {
        "number": "5",
        "name": "DONE",
        "type": "output",
        "description": "Open-drain charge-complete indicator (active low). Internal transistor pulls this pin low when charging ends; otherwise high-impedance. Rated up to 30 V, sink 12 mA typ."
      },
      {
        "number": "6",
        "name": "TEMP",
        "type": "input",
        "description": "Battery temperature sensing input. Connect an NTC thermistor (typ. 10 kΩ) between TEMP and GND. Internal 55 µA pull-up; charging is suspended when temperature is out of range (Vthh 1.61 V / Vthl 0.175 V)."
      },
      {
        "number": "7",
        "name": "MPPT",
        "type": "input",
        "description": "Solar panel maximum-power-point tracking input. Regulated to 1.04 V at 25 °C with a −0.4 %/°C temperature coefficient to match a Si solar cell's MPP voltage. Requires an external resistor divider from the panel to sense its terminal voltage."
      },
      {
        "number": "8",
        "name": "COM1",
        "type": "passive",
        "description": "Loop compensation input 1. Connect a 470 pF capacitor from this pin to GND."
      },
      {
        "number": "9",
        "name": "COM2",
        "type": "passive",
        "description": "Loop compensation input 2. Connect a 120 Ω resistor in series with a 220 nF capacitor from this pin to GND."
      },
      {
        "number": "10",
        "name": "FB",
        "type": "input",
        "description": "Battery voltage feedback input. Sense the battery voltage through an external resistor divider; the regulator holds this pin at 2.416 V. Bias current ~50 nA typ (300 nA max)."
      },
      {
        "number": "11",
        "name": "COM3",
        "type": "passive",
        "description": "Loop compensation input 3. Connect a 100 nF capacitor from this pin to GND. Absolute max 6.5 V."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection. Leave floating."
      },
      {
        "number": "13",
        "name": "CSP",
        "type": "input",
        "description": "Positive input of the charge-current sense amplifier. CSP and BAT measure the voltage across the sense resistor R_CS to close the current-regulation loop. In CC mode V(CSP−BAT) = 200 mV typ (→ I_chg = 200 mV / R_CS)."
      },
      {
        "number": "14",
        "name": "BAT",
        "type": "input",
        "description": "Negative input of the charge-current sense amplifier and battery-terminal connection. Together with CSP measures V(R_CS) and monitors the battery voltage for over-voltage protection (Vov = 1.08·V_REG typ)."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Main supply input for the chip and internal circuitry. Operating range 7.5-28 V; UVLO ≈ 6 V. Bypass to GND with a local filter capacitor."
      },
      {
        "number": "16",
        "name": "DRV",
        "type": "output",
        "description": "Gate drive output for the external P-channel MOSFET (buck high-side switch). Referenced to VCC: VH (VCC−DRV) = 60 mV @ −10 mA, VL = 6.5 V typ; ~40 ns rise/fall into 2 nF; f_osc = 300 kHz, D_max = 94 %."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/e09b267b1b044776b539c00c1c147bff.pdf",
        "pages": 12,
        "sha256": "311dd6f804ec3a0f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.8625,
        -2.275
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TSSOP-16_4.4x5mm_P0.65mm@sha256:fbac79fc5f310754",
      "mark": "drawn"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cn3722-etched.step",
        "role": "eda",
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        "units": "mm",
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        "extents_mm": [
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        "zmin_mm": 0,
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        "sha256": "08544536a79900009398ad71a934239a378a5e2d25435d476009b3054d1b26da",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ShangHai Consonance Elec",
      "Package": "TSSOP-16",
      "Category": "PMIC",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cn3722"
  ],
  "discovery_pitch": "CN3722 (ShangHai Consonance Elec) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "files": [
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    "cn3722-etched.step",
    "cn3722.lbr",
    "docs/hero.png",
    "docs/cn3722-datasheet.pdf",
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  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T19:22:22.748Z"
}