DK2649CB

{
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  "type": "component",
  "slug": "dk2649cb",
  "title": "DK2649CB",
  "brief": "Shenzhen DongKe Semicon AC-DC Controllers And Regulators, SOP-8. 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 (pmic)",
    "dk2649cb",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "DK2649CB",
    "manufacturer": "Shenzhen DongKe Semicon",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590234689576468480",
    "parts": {
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      "footprint": "dk2649cb.kicad_mod",
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      "lbr": "dk2649cb.lbr"
    },
    "distributor_links": {
      "lcsc": "C3013891"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T07:37:53Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the controller; the datasheet gives no electrical limit for this pin."
      },
      {
        "number": "2",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply pin with a stated AC-input operating range of 9 V to 34 V, UVLO turn-on at 7.0 to 8.4 V, and VDD overvoltage protection at 35 to 38 V."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input with a 4.8 to 6.2 V open-loop voltage, where FB falling below 1.6 V enters skip (burst) mode and the short-circuit current is 0.24 mA."
      },
      {
        "number": "4",
        "name": "CS",
        "type": "input",
        "description": "Current-sense input with an overcurrent threshold of 0.71 to 0.80 V, 270 ns leading-edge blanking and 40 kΩ input impedance, so no external RC filter is required."
      },
      {
        "number": "5",
        "name": "DRAIN",
        "type": "passive",
        "description": "Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts."
      },
      {
        "number": "6",
        "name": "DRAIN",
        "type": "passive",
        "description": "Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts."
      },
      {
        "number": "7",
        "name": "DRAIN",
        "type": "passive",
        "description": "Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts."
      },
      {
        "number": "8",
        "name": "DRAIN",
        "type": "passive",
        "description": "Drain of the internal 650 V power MOSFET (RDS(ON) 1.8 to 2 Ω); enlarge and tin the copper area for heat dissipation and keep at least 1.5 mm clearance from low-voltage parts."
      }
    ],
    "provenance": {
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  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen DongKe Semicon",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
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          "name": "功率管漏源电压",
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          "unit": "V",
          "min": null,
          "typ": 650,
          "max": 700,
          "conditions": "",
          "source_page": 3,
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        {
          "name": "VDD供电电压",
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        {
          "name": "IDD供电电流",
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          "name": "储存温度范围",
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          "name": "VDD工作电压",
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          "kind": "electrical",
          "unit": "V",
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          "typ": 17,
          "max": 34,
          "conditions": "AC 输入 85V-265V",
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          "name": "工作电流",
          "symbol": "IOP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.83,
          "max": null,
          "conditions": "VDD=17V, VFB=3V, VCS=0V",
          "source_page": 3,
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        {
          "name": "欠压保护开启电压",
          "symbol": "Vuvlo(ON)",
          "kind": "electrical",
          "unit": "V",
          "min": 7,
          "typ": 7.7,
          "max": 8.4,
          "conditions": "VDD 下降至 IC 关闭",
          "source_page": 3,
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        {
          "name": "欠压保护关断电压",
          "symbol": "Vuvlo (OFF)",
          "kind": "electrical",
          "unit": "V",
          "min": 15.5,
          "typ": 16,
          "max": 17,
          "conditions": "VDD 上升至 IC 开启",
          "source_page": 3,
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        },
        {
          "name": "跳频保护电压",
          "symbol": "VDD_ET",
          "kind": "electrical",
          "unit": "V",
          "min": 7.7,
          "typ": 8.2,
          "max": 8.7,
          "conditions": "FB=0V，CS=0V",
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        {
          "name": "过压保护",
          "symbol": "VOVP",
          "kind": "electrical",
          "unit": "V",
          "min": 35,
          "typ": 35.7,
          "max": 38,
          "conditions": "VDD=17V, VCS=0V, VFB=3V, VDD 上升直到 DRAIN 端频率消失",
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        },
        {
          "name": "FB 开环电压",
          "symbol": "VFB_OPEN",
          "kind": "electrical",
          "unit": "V",
          "min": 4.8,
          "typ": 5.55,
          "max": 6.2,
          "conditions": "",
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        {
          "name": "FB 短路电流",
          "symbol": "IFB_SHORT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.24,
          "max": null,
          "conditions": "VDD=17V, FB 短路到地",
          "source_page": 3,
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        {
          "name": "绿色模式阈值",
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          "kind": "electrical",
          "unit": "V",
          "min": null,
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          "conditions": "VDD=17V, VCS=0V, VFB=3V, FB 下降，当 DRAIN 端频率小于 35KHZ 时",
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        {
          "name": "跳频模式阈值",
          "symbol": "VTH_BM",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.6,
          "max": null,
          "conditions": "VDD=17V, FB 下降",
          "source_page": 3,
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        {
          "name": "前沿消隐时间",
          "symbol": "TLEB",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 270,
          "max": null,
          "conditions": "",
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        {
          "name": "CS 脚输入阻抗",
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          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 40,
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        {
          "name": "CS 脚过流保护阈值",
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          "kind": "electrical",
          "unit": "V",
          "min": 0.71,
          "typ": 0.77,
          "max": 0.8,
          "conditions": "VDD=17V, VFB=3V, CS 上升至关断功率管",
          "source_page": 3,
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        {
          "name": "过流保护延迟时间",
          "symbol": "TD_OC",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 120,
          "max": null,
          "conditions": "从过流保护至功率管开始关断的延迟时间",
          "source_page": 3,
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        {
          "name": "振荡频率",
          "symbol": "FOSC",
          "kind": "electrical",
          "unit": "KHz",
          "min": 60,
          "typ": 65,
          "max": 70,
          "conditions": "VDD=17V, VFB=3V, VCS=0V",
          "source_page": 3,
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        {
          "name": "最大占空比",
          "symbol": "DMAX",
          "kind": "electrical",
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          "min": 65,
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          "conditions": "VDD=17V, VFB=3.3V, VCS=0V",
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          "kind": "electrical",
          "unit": "KHz",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "",
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        {
          "name": "抖频范围",
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          "unit": "%",
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          "typ": null,
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        {
          "name": "功率管导通内阻",
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          "unit": "Ω",
          "min": null,
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          "name": "过温保护",
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          "kind": "electrical",
          "unit": "℃",
          "min": null,
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