UC2843BM

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc2843bm",
  "title": "UC2843BM",
  "brief": "HGSEMI 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)",
    "uc2843bm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "UC2843BM",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602944236740358144",
    "parts": {
      "symbol": "uc2843bm.kicad_sym",
      "footprint": "uc2843bm.kicad_mod",
      "model_3d": "uc2843bm-hero.glb",
      "model_3d_plain": "uc2843bm-etched.glb",
      "model_3d_step": "uc2843bm-etched.step",
      "model_3d_step_plain": "uc2843bm.step",
      "lbr": "uc2843bm.lbr"
    },
    "distributor_links": {
      "lcsc": "C19193446"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T02:20:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "bidirectional",
        "description": "Error amplifier compensation node; the error amplifier can sink up to 10 mA (absolute maximum rating), and pulling this pin below two diode drops shuts the controller down."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input, regulated to a 2.5 V reference (VI(EA) 2.42 V to 2.58 V) with input bias current of -0.1 µA typical and -2 µA maximum."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current-sense comparator input with a maximum input signal of 0.9 V to 1.1 V (1 V typical) and an analog input absolute range of -0.3 V to +5.5 V; raising it above 1 V shuts the output off."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "bidirectional",
        "description": "RC oscillator timing input, with a recommended switching frequency range of 100 kHz to 500 kHz and an oscillator amplitude of about 1.6 V peak-to-peak."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; the supply bypass capacitor should be placed close to this pin to handle high peak currents from capacitive loads."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "PWM totem-pole output for driving an N-channel MOSFET, held low when off, with output current limited to ±1 A (absolute maximum) and 200 mA average; it is driven to high impedance during undervoltage lockout and needs a divider to GND to prevent leakage from turning on the power switch."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply pin with a recommended maximum of 28 V (absolute maximum 30 V), a startup current below 0.5 mA, and a 34 V typical Zener clamp at 25 mA."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "Internally trimmed 5.00 V reference output (4.95 V to 5.05 V at 1 mA, 25 °C) with a maximum reference output current of -20 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 datasheet pin table marks GND and VCC I/O as '/' (no direction given); types were assigned as po; The pinout is a single figure shared by DIP-8 and SOP-8 on page 2. The ordering table lists UC2843BM"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0425,
        "at": "2026-10-19T02:17:48"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602944236740358144",
        "pages": 11,
        "sha256": "2c475c66553f62aa",
        "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": "uc2843bm.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": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc2843bm-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": "1a4d0bae579c58f5980eccbd52b21dee2f99bd0a1c1b332f6f9cfab9b8e5746b",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2c475c66553f62aaa52da0dbf00b267e44042fab4d4f24964e4b0574fcfbc5c0",
      "rows": [
        {
          "name": "电源电压",
          "symbol": "Vcc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "输出电流",
          "symbol": "Io",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "模拟输入（2，3 脚）",
          "symbol": "VI(ANA)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "误差放大器输出灌电流",
          "symbol": "ISINK(EA)",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "耗散功率",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Tamb≤25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "结温",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "存储温度",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "闩锁",
          "symbol": "LU",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "25°C&125°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD 人体模式",
          "symbol": "ESD-HBM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2000,
          "typ": null,
          "max": 2000,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD 充电器件模式",
          "symbol": "ESD-CDM",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -500,
          "typ": null,
          "max": 500,
          "conditions": "25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "引脚温度（焊接 10s）",
          "symbol": "TLEAD",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "焊接 10s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "电源电压",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 28,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "输入电压 RT/CT、VFB、ISENSE",
          "symbol": "VI",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "输出电压",
          "symbol": "VO",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 28,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "电源电流",
          "symbol": "ICC",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "平均输出电流",
          "symbol": "Io",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "基准输出电流",
          "symbol": "Io(ref)",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -20,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "振荡频率",
          "symbol": "fosc",
          "kind": "recommended_operating",
          "unit": "kHz",
          "min": null,
          "typ": 100,
          "max": 500,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "正常工作环温",
          "symbol": "Ta",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "输出电压（基准）",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 4.95,
          "typ": 5,
          "max": 5.05,
          "conditions": "Ta=25°C，IL=1mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "线性调整率",
          "symbol": "∆VREF1",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 6,
          "max": 20,
          "conditions": "VCC=12V~25V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "负载调整率",
          "symbol": "∆VREF2",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 6,
          "max": 25,
          "conditions": "IL=1mA~20mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "温度稳定性（基准）",
          "symbol": "TS",
          "kind": "temperature_coefficient",
          "unit": "mV/°C",
          "min": null,
          "typ": 0.2,
          "max": 0.4,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "总的输出变化",
          "symbol": "∆VREF3",
          "kind": "electrical",
          "unit": "V",
          "min": 4.82,
          "typ": null,
          "max": 5.18,
          "conditions": "Line，Load，Temp",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "长期稳定性",
          "symbol": "S",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 5,
          "max": 25,
          "conditions": "Ta=25°C，1000 小时",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出短路电流",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": -30,
          "typ": -100,
          "max": -180,
          "conditions": "VREF=0V，Ta=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "初始精度（振荡器）",
          "symbol": "f",
          "kind": "electrical",
          "unit": "kHz",
          "min": 49,
          "typ": 52,
          "max": 55,
          "conditions": "Ta=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "电压稳定性（振荡器）",
          "symbol": "∆f/∆VCC",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "VCC=12V~25V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "放电电流",
          "symbol": "Idischg",
          "kind": "electrical",
          "unit": "mA",
          "min": 7.5,
          "typ": null,
          "max": 8.8,
          "conditions": "VOSC=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入电压（误差放大器）",
          "symbol": "VI(EA)",
          "kind": "electrical",
          "unit": "V",
          "min": 2.42,
          "typ": 2.5,
          "max": 2.58,
          "conditions": "Vpin 1=2.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入偏置电流（误差放大器）",
          "symbol": "IBIAS",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": -0.1,
          "max": -2,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "开环电压增益",
          "symbol": "AVOL",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 90,
          "max": null,
          "conditions": "2≤Vo≤4V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "单位增益带宽",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "MHz",
          "min": 0.7,
          "typ": 1,
          "max": null,
          "conditions": "Ta=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "电源电压抑制比（误差放大器）",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 70,
          "max": null,
          "conditions": "12≤Vcc≤25V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出灌电流",
          "symbol": "Isink",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": 12,
          "max": null,
          "conditions": "Vpin 2=2.7V，Vpin 1=1.1V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出拉电流",
          "symbol": "Isource",
          "kind": "electrical",
          "unit": "mA",
          "min": -0.5,
          "typ": -1,
          "max": null,
          "conditions": "Vpin 2=2.3V，Vpin 1=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出高电平（Vout）",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": 6.2,
          "max": null,
          "conditions": "Vpin 2=2.3V，RL=15kΩ to GND",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出低电平（Vout）",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.8,
          "max": 1.1,
          "conditions": "Vpin 2=2.7V，RL=15kΩ to VREF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "增益",
          "symbol": "GV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 2.85,
          "typ": 3,
          "max": 3.15,
          "conditions": "注 1，2",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "最大输入信号",
          "symbol": "VI(MAX)",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "Vpin 1=5V（注 1）",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入偏置电流（电流采样）",
          "symbol": "IBIAS",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": -2,
          "max": -10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出延迟",
          "symbol": "TPLH",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 150,
          "max": 300,
          "conditions": "Vpin 3=0~2V",
          "source_page": 4,
          "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": 4,
          "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": 4,
          "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": 4,
          "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": 4,
          "source": "datasheet"
        },
        {
          "name": "上升时间",
          "symbol": "tR",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "Ta=25°C，CL=1nF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "下降时间",
          "symbol": "tF",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 150,
          "conditions": "Ta=25°C，CL=1nF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "UVLO 低电平输出饱和压降",
          "symbol": "VOL(UVLO)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.7,
          "max": 1.2,
          "conditions": "Vcc=5V，Isink=1mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "启动阈值",
          "symbol": "VTH(ST)",
          "kind": "electrical",
          "unit": "V",
          "min": 7.8,
          "typ": 8.4,
          "max": 9,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "开启后最小工作电压",
          "symbol": "VOPR(min)",
          "kind": "electrical",
          "unit": "V",
          "min": 7,
          "typ": 7.6,
          "max": 8.2,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "最小占空比",
          "symbol": "D(MIN)",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "最大占空比",
          "symbol": "D(MAX)",
          "kind": "electrical",
          "unit": "%",
          "min": 94,
          "typ": 96,
          "max": 100,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "启动电流",
          "symbol": "IST",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 0.5,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "工作电流",
          "symbol": "ICC(opr)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 12,
          "max": 17,
          "conditions": "Vpin 2=Vpin 3=0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Vcc 齐纳电压",
          "symbol": "Vz",
          "kind": "electrical",
          "unit": "V",
          "min": 30,
          "typ": 34,
          "max": null,
          "conditions": "Icc=25mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "结对环境热阻",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 100.9,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "结壳（上）热阻",
          "symbol": "RthJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 41.4,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "uc2843bm"
  ],
  "discovery_pitch": "UC2843BM (HGSEMI) 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",
    "uc2843bm.kicad_sym",
    "uc2843bm.kicad_mod",
    "uc2843bm.glb",
    "uc2843bm.step",
    "uc2843bm.lbr",
    "docs/hero.png",
    "docs/uc2843bm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc2843bm-hero.glb",
    "uc2843bm-hero.overlay.json",
    "uc2843bm-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}