UC2845BD

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc2845bd",
  "title": "UC2845BD",
  "brief": "lingxingic 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)",
    "uc2845bd",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC2845BD",
    "manufacturer": "lingxingic",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603345057739259904",
    "parts": {
      "symbol": "uc2845bd.kicad_sym",
      "footprint": "uc2845bd.kicad_mod",
      "model_3d": "uc2845bd-hero.glb",
      "model_3d_plain": "uc2845bd-etched.glb",
      "model_3d_step": "uc2845bd-etched.step",
      "model_3d_step_plain": "uc2845bd.step",
      "lbr": "uc2845bd.lbr"
    },
    "distributor_links": {
      "lcsc": "C22390258"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T17:10:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output (比较端) that the datasheet specifies with a sink current capability of 2 to 12 mA and a limit of 10 mA for the error amplifier output sink current."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Negative feedback input (负反馈) of the error amplifier, with a 2.50 V reference (2.42 to 2.58 V) and an input bias current of -0.1 to -2 µA at VFB = 5 V."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current sense input (电流灵敏度) with a current-sense gain of 3 V/V (2.85 to 3.15 V/V) and a maximum input signal of 0.9 to 1.1 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin (振荡端); with RT = 10 kΩ and CT = 3.3 nF the datasheet gives an oscillator frequency of 49 to 55 kHz (52 kHz typical) at Tj = 25 ℃."
      },
      {
        "number": "5",
        "name": "GROUND",
        "type": "power_in",
        "description": "Ground (地) reference pin for the controller."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Push-pull output (输出) that can source or sink large currents to drive a MOSFET power device, with an output current rating of ±1 A."
      },
      {
        "number": "7",
        "name": "Vi",
        "type": "power_in",
        "description": "Supply pin (电源) with a 30 V maximum rating from a low-impedance source; for the UC2845 the undervoltage lockout is 8.8 V turn-on and 7.6 V turn-off."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "Reference voltage (参考电压) output of 5.00 V (4.90 to 5.10 V) at Io = 1 mA, with an output short-circuit current of -30 to -180 mA."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The SOP8 pinout is taken from the 引脚说明 (pin description) table on the page-5 marker. The pin-diagram; The product table on the page-3 marker lists four SOP8 rows, but the product-name cells are blank in; The datasheet gives one pinout shared by the DIP8 and SOP8 variants. The pin descriptions were taken",
          "1/8 pin names appear NOWHERE in the datasheet text: ['5:GROUND@p5']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0432,
        "at": "2026-10-18T17:09:55"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603345057739259904",
        "pages": 11,
        "sha256": "065498dc909cbc66",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "uc2845bd.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2845bd-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3c8befd78a105e4297ec018dbc8468686b2c6e7495c18c1c4ebe62d529cee22e",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "lingxingic",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "065498dc909cbc66c18aff40d43aef5f3e45deab40082608e65605d2109de6bc",
      "rows": [
        {
          "name": "电源电压（低阻抗源）",
          "symbol": "Vi",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "输出电流",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "误差放大器输出端灌电流",
          "symbol": "Isink(EA)",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "模拟输入范围",
          "symbol": "Vin(EA)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.3,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "热阻 SOP8",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 160,
          "conditions": "JEDEC 2S2P, SOP8 (single printed value)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "工作温度",
          "symbol": "Tamb",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "存储温度",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "焊接温度",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 s, SOP8",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VREF 输出电压",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.9,
          "typ": 5,
          "max": 5.1,
          "conditions": "Io=1mA，Tj=25℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "线性调整率",
          "symbol": "∆VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 2,
          "max": 20,
          "conditions": "12V≤Vi≤25V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "负载调整率",
          "symbol": "∆VREF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 25,
          "conditions": "1≤Io≤20mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "总输出变化率",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 4.7,
          "typ": null,
          "max": 5.3,
          "conditions": "line, load, temperature",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "输出短路电流",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": -30,
          "typ": -100,
          "max": -180,
          "conditions": "注 4",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "振荡器频率 (Tj=25℃)",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 49,
          "typ": 52,
          "max": 55,
          "conditions": "Tj=25℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "振荡器频率 (Tamb=-40～125℃)",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 47,
          "typ": null,
          "max": 57,
          "conditions": "Tamb=-40～125℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "振荡器频率 (RT/CT 测试条件)",
          "symbol": "fOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 225,
          "typ": 250,
          "max": 275,
          "conditions": "Tj=25℃ (RT=6.2kΩ，CT=1nF)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "频率的电压稳定性",
          "symbol": "∆fOSC/∆V",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "Vi=12V～25V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "放电电流",
          "symbol": "Idischg",
          "kind": "electrical",
          "unit": "mA",
          "min": 7.6,
          "typ": 8.3,
          "max": 9,
          "conditions": "VOSC=2V; Tj=25℃",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "误差放大器输入电压",
          "symbol": "V2",
          "kind": "electrical",
          "unit": "V",
          "min": 2.42,
          "typ": 2.5,
          "max": 2.58,
          "conditions": "VPIN1=2.5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "输入偏置电流 (误差放大器)",
          "symbol": "Ib",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": -0.1,
          "max": -2,
          "conditions": "VFB=5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "开环电压增益",
          "symbol": "AVOL",
          "kind": "electrical",
          "unit": "dB",
          "min": 65,
          "typ": 90,
          "max": null,
          "conditions": "2V≤Vo≤4V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "单位增益带宽",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "MHz",
          "min": 0.7,
          "typ": 1,
          "max": null,
          "conditions": "Tj=25℃ 注 4",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "电源抑制比 (误差放大器)",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 70,
          "max": null,
          "conditions": "12V≤Vi≤25V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出灌电流",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": 12,
          "max": null,
          "conditions": "VPIN2=2.7V，VPIN1=1.1V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出拉电流",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "mA",
          "min": -0.5,
          "typ": -1,
          "max": null,
          "conditions": "VPIN2=2.3V，VPIN1=5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出高电平",
          "symbol": "VOUT High",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": 6.2,
          "max": null,
          "conditions": "VPIN2=2.3V；RL=15KΩ to ground",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出低电平",
          "symbol": "VOUT Low",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.8,
          "max": 1.1,
          "conditions": "VPIN2=2.7V；RL=15KΩ to PIN 8",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "电流传感器增益",
          "symbol": "GV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 2.85,
          "typ": 3,
          "max": 3.15,
          "conditions": "注 5、6",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "最大输入信号",
          "symbol": "V3",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "VPIN1=5V（注 5）",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "电流传感器电源抑制比",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "12V≤Vi≤25V（注 5）",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输入偏置电流 (电流传感器)",
          "symbol": "Ib",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": -2,
          "max": -10,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "传输延迟",
          "symbol": "",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 150,
          "max": 300,
          "conditions": "注 4",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出低电平 (Isink=20mA)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 0.4,
          "conditions": "Isink=20mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出低电平 (Isink=200mA)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.6,
          "max": 2.2,
          "conditions": "Isink=200mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出高电平 (Isource=20mA)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 13,
          "typ": 13.5,
          "max": null,
          "conditions": "Isource=20mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "输出高电平 (Isource=200mA)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 12,
          "typ": 13.5,
          "max": null,
          "conditions": "Isource=200mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "欠压锁存饱和压降",
          "symbol": "VOLS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 1.1,
          "conditions": "Vi=6V，ISINK=1mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "上升时间",
          "symbol": "tr",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "CL=1nF（注 4）",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "下降时间",
          "symbol": "tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "CL=1nF（注 4）",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "开启阈值电压 (UC2843/UC2845 行)",
          "symbol": "VTH(ST)",
          "kind": "electrical",
          "unit": "V",
          "min": 7.8,
          "typ": 8.8,
          "max": 9.5,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "维持工作的最小电压 (UC2843/UC2845 行)",
          "symbol": "VOPR(MIN)",
          "kind": "electrical",
          "unit": "V",
          "min": 7,
          "typ": 7.6,
          "max": 8.4,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "最大占空比 (UC2844/UC2845 行)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 47,
          "typ": 48,
          "max": 50,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "最小占空比",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "启动电流",
          "symbol": "Ist",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 1,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "工作时电源电流",
          "symbol": "Ii",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 12,
          "max": 20,
          "conditions": "VPIN2=VPIN3=0V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "齐纳管电压",
          "symbol": "Viz",
          "kind": "electrical",
          "unit": "V",
          "min": 30,
          "typ": 36,
          "max": null,
          "conditions": "Ii=25mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "线性调整率温度系数 (VREF)",
          "symbol": "∆VREF/∆T",
          "kind": "temperature_coefficient",
          "unit": "mV/℃",
          "min": null,
          "typ": 0.25,
          "max": null,
          "conditions": "注 4",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "频率的温度稳定性",
          "symbol": "∆fOSC/∆T",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.55,
          "max": null,
          "conditions": "Tamb=-40～125℃（注 4）",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "振荡幅度 (peak to peak)",
          "symbol": "VOSC",
          "kind": "electrical",
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