SY6935QDC

{
  "schema_version": 1,
  "type": "component",
  "slug": "sy6935qdc",
  "title": "SY6935QDC",
  "brief": "Silergy Corp Battery Management ICs, QFN-16(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management ics",
    "sy6935qdc",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SY6935QDC",
    "manufacturer": "Silergy Corp",
    "package": "QFN-16(3x3)",
    "pin_count": 17,
    "category": "Power Management ICs",
    "subcategory": "Battery Management ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/da184dd51d68fb74e936ab103d895fab.pdf",
    "parts": {
      "symbol": "sy6935qdc.kicad_sym",
      "footprint": "sy6935qdc.kicad_mod",
      "model_3d": "sy6935qdc-hero.glb",
      "model_3d_plain": "sy6935qdc-etched.glb",
      "model_3d_step": "sy6935qdc-etched.step",
      "model_3d_step_plain": "sy6935qdc.step",
      "lbr": "sy6935qdc.lbr"
    },
    "distributor_links": {
      "lcsc": "C207625"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T19:25:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RS",
        "type": "input",
        "description": "Charge current sense resistor positive pin; the voltage drop between RS and BAT is used for charge current regulation and charge termination detection (RS limited to BAT±0.25V recommended)."
      },
      {
        "number": "2",
        "name": "CELL",
        "type": "input",
        "description": "Battery voltage selection pin: floating for two-cell battery and grounded for single-cell battery; must not be pulled higher than 3.3V."
      },
      {
        "number": "3",
        "name": "TIM",
        "type": "passive",
        "description": "Charge time-out programming pin; connect a capacitor to ground to set the time-out threshold for trickle and fast charge modes (TC limit is about 1/9 of fast charge time)."
      },
      {
        "number": "4",
        "name": "NTC",
        "type": "input",
        "description": "Battery thermal sense pin with UTP threshold typically 75% VIN and OTP threshold typically 45% VIN; pulling it low for more than 100ms refreshes the adaptive input power limit threshold."
      },
      {
        "number": "5",
        "name": "CV",
        "type": "input",
        "description": "Battery CV voltage selection pin (below 0.4V selects 4.2V/cell, above 1.5V selects 4.35V/cell)."
      },
      {
        "number": "6",
        "name": "VSEN",
        "type": "input",
        "description": "Input voltage sense pin for adaptive input power limit; when the voltage drops to the internal 1.19V reference, VIN is clamped and input current is limited."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Enable control pin: high logic (above 1.5V) enables, low logic (below 0.4V) disables."
      },
      {
        "number": "8",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal ground pin."
      },
      {
        "number": "9",
        "name": "STAT",
        "type": "output",
        "description": "Open-drain charge status indication pin; pulled high to IN through a LED, which is on during charging, off when done, and flashing at 1.3Hz in fault mode."
      },
      {
        "number": "10",
        "name": "BD",
        "type": "passive",
        "description": "Connects to the drain of the internal blocking FET; bypass with at least 10uF ceramic capacitor to GND."
      },
      {
        "number": "11",
        "name": "BST",
        "type": "passive",
        "description": "Boot-strap pin supplying the main FET gate driver; decouple to LX with a 0.1uF ceramic capacitor."
      },
      {
        "number": "12",
        "name": "IN",
        "type": "power_in",
        "description": "DC power input pin (4V to 14V operating) with OVP and UVLO functions; connect an MLCC to ground to decouple high-frequency noise."
      },
      {
        "number": "13",
        "name": "BD",
        "type": "passive",
        "description": "Connects to the drain of the internal blocking FET; bypass with at least 10uF ceramic capacitor to GND."
      },
      {
        "number": "14",
        "name": "LX",
        "type": "passive",
        "description": "Switch node pin; connect to the external inductor."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin."
      },
      {
        "number": "16",
        "name": "BAT",
        "type": "input",
        "description": "Battery voltage sense pin."
      },
      {
        "number": "17",
        "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-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pins 10 and 13 are both named BD in the datasheet; the pinout figure was not available in the text, ; Datasheet is a preliminary application note (Rev 0.1). The CV pin description is terse; the threshol"
        ],
        "pages_sent": 15,
        "cost_usd": 0.1225,
        "at": "2026-10-26T19:25:14"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/da184dd51d68fb74e936ab103d895fab.pdf",
        "pages": 15,
        "sha256": "a3eb13df3fdd227f",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "sy6935qdc.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.785
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sy6935qdc-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.785
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6ab02c86a4ae7e8e2891b56f4f30aa5c4addb4c19e942debbdd24a1b708c11b6",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Silergy Corp",
      "Package": "QFN-16(3x3)",
      "Category": "Power Management ICs",
      "Pins": "17"
    },
    "appearance": {
      "contacts": {
        "quote": "4) The PCB copper area associated with LX pin",
        "page": 12,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "a3eb13df3fdd227f395aa045dc1d9bb00b3608421a6d65b7632fec2608e5c83d"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a3eb13df3fdd227f395aa045dc1d9bb00b3608421a6d65b7632fec2608e5c83d",
      "rows": [
        {
          "name": "Supply voltage operation range",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 14,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input overvoltage protection",
          "symbol": "VIN_OVP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 13.5,
          "max": null,
          "conditions": "VIN rising and measured from IN to ground",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery discharge current",
          "symbol": "IBAT",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "VIN absent or EN=Low",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input quiescent current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.8,
          "max": 1.1,
          "conditions": "Disable Charge",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery charge voltage 1-cell 4.2V",
          "symbol": "VBAT",
          "kind": "electrical",
          "unit": "V",
          "min": 4.179,
          "typ": 4.2,
          "max": 4.221,
          "conditions": "1-cell battery, Vcv<0.4V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery charge voltage 1-cell 4.35V",
          "symbol": "VBAT",
          "kind": "electrical",
          "unit": "V",
          "min": 4.328,
          "typ": 4.35,
          "max": 4.371,
          "conditions": "1-cell battery, Vcv>1.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery charge voltage 2-cell 8.4V",
          "symbol": "VBAT",
          "kind": "electrical",
          "unit": "V",
          "min": 8.358,
          "typ": 8.4,
          "max": 8.442,
          "conditions": "2-cell battery, Vcv<0.4V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery charge voltage 2-cell 8.7V",
          "symbol": "VBAT",
          "kind": "electrical",
          "unit": "V",
          "min": 8.656,
          "typ": 8.7,
          "max": 8.744,
          "conditions": "2-cell battery, Vcv>1.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Recharge threshold 1-cell",
          "symbol": "ΔVRCH",
          "kind": "electrical",
          "unit": "mV",
          "min": 50,
          "typ": 100,
          "max": 150,
          "conditions": "1-cell battery",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Recharge threshold 2-cell",
          "symbol": "ΔVRCH",
          "kind": "electrical",
          "unit": "mV",
          "min": 100,
          "typ": 200,
          "max": 300,
          "conditions": "2-cell battery",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge rising edge threshold 1-cell",
          "symbol": "VTRK",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": 2.8,
          "max": 2.9,
          "conditions": "1-cell battery",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge rising edge threshold 2-cell",
          "symbol": "VTRK",
          "kind": "electrical",
          "unit": "V",
          "min": 5.4,
          "typ": 5.6,
          "max": 5.8,
          "conditions": "2-cell battery",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Charge current accuracy CC mode",
          "symbol": "ICC",
          "kind": "tolerance",
          "unit": "%",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "ICC=25mV/RS",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Charge current accuracy trickle mode",
          "symbol": "ITC",
          "kind": "tolerance",
          "unit": "%",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "ITC=2.5mV/RS",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Termination current accuracy",
          "symbol": "ITERM",
          "kind": "tolerance",
          "unit": "%",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "ITERM=2.5mV/RS",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage OVP threshold",
          "symbol": "VO_OVP",
          "kind": "electrical",
          "unit": "% VCV",
          "min": 105,
          "typ": 110,
          "max": 115,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reference for adaptive input power limit",
          "symbol": "VSEN",
          "kind": "electrical",
          "unit": "V",
          "min": 1.16,
          "typ": 1.19,
          "max": 1.22,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle current charge timeout",
          "symbol": "TTC",
          "kind": "timing",
          "unit": "hour",
          "min": 0.36,
          "typ": 0.5,
          "max": 0.64,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Constant current charge timeout",
          "symbol": "TCC",
          "kind": "timing",
          "unit": "hour",
          "min": 3.5,
          "typ": 4.5,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output short protection threshold, falling edge",
          "symbol": "VSHORT",
          "kind": "electrical",
          "unit": "V",
          "min": 1.7,
          "typ": 2,
          "max": 2.3,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Auto shutdown voltage threshold",
          "symbol": "ΔVASD",
          "kind": "electrical",
          "unit": "mV",
          "min": 40,
          "typ": 90,
          "max": 140,
          "conditions": "VIN fall, Measured from IN to VBAT",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Under temperature protection",
          "symbol": "UTP",
          "kind": "electrical",
          "unit": "% VIN",
          "min": 70,
          "typ": 75,
          "max": 80,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Over temperature protection",
          "symbol": "OTP",
          "kind": "electrical",
          "unit": "% VIN",
          "min": 43,
          "typ": 45,
          "max": 47,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High level logic for enable control",
          "symbol": "VEN",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low level logic for enable control",
          "symbol": "VEN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "CV high level logic",
          "symbol": "VCV",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "CV low level logic",
          "symbol": "VCV",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input voltage lockout threshold",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "VIN rising and measured from IN to ground",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": 500,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RDS(ON) of Main N-FET",
          "symbol": "RNFET_M",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RDS(ON) of Rectified N-FET",
          "symbol": "RNFET_R",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 45,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RDS(ON) of Blocking N-FET",
          "symbol": "RNFET_B",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 35,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal fold-back threshold",
          "symbol": "TFold",
          "kind": "thermal",
          "unit": "ºC",
          "min": null,
          "typ": 120,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown temperature",
          "symbol": "TSD",
          "kind": "thermal",
          "unit": "ºC",
          "min": null,
          "typ": 160,
          "max": null,
          "conditions": "Rising Threshold",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Abs max IN, BAT, LX, NTC, STAT, BD, EN, CV, VSEN",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 18,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Abs max TIM, CELL",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Abs max BST-LX voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Abs max LX pin current continuous",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 2.1,
          "conditions": "TA = 25°C, QFN3x3",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature range (abs max)",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Lead temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 sec.",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 48,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to case",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended IN voltage",
          "symbol": "IN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": 14,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended BAT, LX, NTC, STAT, BD, EN, CV, VSEN",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 16,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended TIM, CELL",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 3.3,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended BST-LX voltage",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 3.3,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended LX pin current continuous",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 4.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended junction temperature range",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Recommended ambient temperature range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sy6935qdc"
  ],
  "discovery_pitch": "SY6935QDC (Silergy Corp) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sy6935qdc.kicad_sym",
    "sy6935qdc.kicad_mod",
    "sy6935qdc.glb",
    "sy6935qdc.step",
    "sy6935qdc.lbr",
    "docs/hero.png",
    "docs/sy6935qdc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sy6935qdc-hero.glb",
    "sy6935qdc-hero.overlay.json",
    "sy6935qdc-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}