CN3703

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  "type": "component",
  "slug": "cn3703",
  "title": "CN3703",
  "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": [
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    "pmic",
    "cn3703"
  ],
  "component": {
    "mpn": "CN3703",
    "manufacturer": "ShangHai Consonance Elec",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "PMIC",
    "subcategory": "Battery Management",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dbebbd5ac1b14c4a934b4085494234bb.pdf",
    "parts": {
      "symbol": "cn3703.kicad_sym",
      "footprint": "cn3703.kicad_mod",
      "model_3d": "cn3703-etched.glb",
      "model_3d_plain": "cn3703.glb",
      "model_3d_step": "cn3703-etched.step",
      "model_3d_step_plain": "cn3703.step",
      "lbr": "cn3703.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VG",
        "type": "power_out",
        "description": "Internal voltage regulator output. Supplies power to the internal gate-drive circuitry. Connect a 100 nF ceramic capacitor between VG and VCC."
      },
      {
        "number": "2",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground return for the high-current gate-drive circuitry."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground reference for the internal control circuitry."
      },
      {
        "number": "4",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge-status output (active-low). Internal transistor pulls this pin low while charging; high-impedance otherwise. Sink current typ. 12 mA at V_CHRG=1V; leakage <1 uA at 25V."
      },
      {
        "number": "5",
        "name": "DONE",
        "type": "output",
        "description": "Open-drain end-of-charge status output (active-low). Internal transistor pulls this pin low when charging terminates; high-impedance otherwise. Sink current typ. 12 mA at V_DONE=1V; leakage <1 uA at 25V."
      },
      {
        "number": "6",
        "name": "TEMP",
        "type": "input",
        "description": "Battery temperature-sense input. Connect an NTC thermistor (10 kΩ at 25°C) between TEMP and GND. Internal 50 uA pull-up; upper threshold 1.61 V, lower threshold 0.175 V."
      },
      {
        "number": "7",
        "name": "EOC",
        "type": "input",
        "description": "End-of-charge current programming input. Connect a resistor R_ext from EOC to GND (or short to GND) to set the termination current: I_EOC = 1.278×(14350+R_ext)/(R_CS×1e6). R_ext must be ≤100 kΩ."
      },
      {
        "number": "8",
        "name": "COM1",
        "type": "passive",
        "description": "Loop compensation input 1. Connect a 470 pF capacitor between COM1 and GND."
      },
      {
        "number": "9",
        "name": "COM2",
        "type": "passive",
        "description": "Loop compensation input 2. Connect a 120 Ω resistor in series with a 220 nF capacitor between COM2 and GND."
      },
      {
        "number": "10",
        "name": "test",
        "type": "input",
        "description": "Test pin. Must be tied to GND in normal operation."
      },
      {
        "number": "11",
        "name": "COM3",
        "type": "passive",
        "description": "Loop compensation input 3. Connect a 100 nF capacitor between COM3 and GND. Absolute max voltage to GND is 6.5 V."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "13",
        "name": "CSP",
        "type": "input",
        "description": "Charge-current sense positive input. Together with BAT, senses the voltage across the external current-sense resistor R_CS to regulate the charging current (V_CS = 200 mV typ; I_CH = 200 mV / R_CS)."
      },
      {
        "number": "14",
        "name": "BAT",
        "type": "input",
        "description": "Battery voltage-sense input and current-sense negative input. Internal precision resistor divider and reference set the 12.6 V constant-voltage float level. Also serves as the return for the CSP current-sense measurement."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "External supply input (7.5-28 V) and also the internal circuit's supply rail. Decouple to GND with a bulk/filter capacitor. UVLO threshold ~6 V typical."
      },
      {
        "number": "16",
        "name": "DRV",
        "type": "output",
        "description": "Gate-drive output for the external P-channel power MOSFET. Referenced to VCC: V_H ≈ VCC−60 mV (I=−10 mA), V_L ≈ VCC−6.5 V (I=0 mA). PWM switching frequency 300 kHz typ, max duty 94%."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/dbebbd5ac1b14c4a934b4085494234bb.pdf",
        "pages": 11,
        "sha256": "86648ccf3673c5c3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "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",
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      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "ShangHai Consonance Elec",
      "Package": "TSSOP-16",
      "Category": "PMIC",
      "Pins": "16"
    }
  },
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "CN3703 (ShangHai Consonance Elec) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
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  "updated_at": "2026-09-24T19:21:58.745Z"
}