UC3846L-D16-T

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc3846l-d16-t",
  "title": "UC3846L-D16-T",
  "brief": "UTC(Unisonic Tech) AC-DC Controllers & Regulators, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power supply chip",
    "uc3846l-d16-t",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "UC3846L-D16-T",
    "manufacturer": "UTC(Unisonic Tech)",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Power Supply Chip",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e9879ac0d1cb50d2d3d6984aacfd51fc.pdf",
    "parts": {
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      "model_3d_step": "uc3846l-d16-t-etched.step",
      "model_3d_step_plain": "uc3846l-d16-t.step",
      "lbr": "uc3846l-d16-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C3008191"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T06:05:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "C/S SS",
        "type": "input",
        "description": "Current-limit adjust / soft-start pin, with a 50 mA maximum soft start sink current."
      },
      {
        "number": "2",
        "name": "VREF",
        "type": "power_out",
        "description": "Internal reference voltage output of 5.0 V min, 5.1 V typ, 5.2 V max at IO=1 mA, with 30 mA maximum reference output current."
      },
      {
        "number": "3",
        "name": "C/S-",
        "type": "input",
        "description": "Current-sense amplifier input (listed as forward input of current limiting), with an analog input range of -0.3 V to +VIN."
      },
      {
        "number": "4",
        "name": "C/S+",
        "type": "input",
        "description": "Current-sense amplifier input (listed as backward input of current limiting), with an analog input range of -0.3 V to +VIN."
      },
      {
        "number": "5",
        "name": "E/A+",
        "type": "input",
        "description": "Forward (non-inverting) input of the error amplifier, with an analog input range of -0.3 V to +VIN and common mode range of 0 to VIN-2 V."
      },
      {
        "number": "6",
        "name": "E/A-",
        "type": "input",
        "description": "Backward (inverting) input of the error amplifier, with an analog input range of -0.3 V to +VIN and common mode range of 0 to VIN-2 V."
      },
      {
        "number": "7",
        "name": "COMP",
        "type": "output",
        "description": "Output of the error amplifier, with 5 mA maximum output current."
      },
      {
        "number": "8",
        "name": "CT",
        "type": "passive",
        "description": "External timing capacitor connection that sets the oscillator frequency."
      },
      {
        "number": "9",
        "name": "RT",
        "type": "passive",
        "description": "External timing resistor connection that sets the oscillator frequency, with 5 mA maximum oscillator charging current."
      },
      {
        "number": "10",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Oscillator synchronization pin, with 5 mA maximum sync output current."
      },
      {
        "number": "11",
        "name": "A OUT",
        "type": "output",
        "description": "Dual totem-pole output A, rated for 500 mA source or sink current."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "13",
        "name": "VC",
        "type": "power_in",
        "description": "Collector supply for the output stage, with a 40 V maximum rating."
      },
      {
        "number": "14",
        "name": "B OUT",
        "type": "output",
        "description": "Dual totem-pole output B, rated for 500 mA source or sink current."
      },
      {
        "number": "15",
        "name": "VIN",
        "type": "power_in",
        "description": "DC supply input, with a 40 V maximum rating and under-voltage lockout start-up threshold of 8.0 V max."
      },
      {
        "number": "16",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Shutdown controller input with a 350 mV typical threshold and input range of 0 to VIN."
      }
    ],
    "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: Pin description table lists C/S- as 'Forward Input' and C/S+ as 'Backward Input', which appears reve; Electrical characteristics Note 1 says ground is 'Pin 13', but the pin table and the application cir; Pin types for CT, RT, SYNC and C/S SS are inferred from function descriptions. The datasheet does no"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0949,
        "at": "2026-10-23T06:04:31"
      },
      "datasheet": {
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        "pages": 10,
        "sha256": "5f227570b8d99fd5",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    },
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        "checked": "2026-10-23",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "UTC(Unisonic Tech)",
      "Package": "DIP-16",
      "Category": "Power Supply Chip",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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        {
          "name": "Line Regulation",
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          "name": "Load Regulation",
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        {
          "name": "Short Circuit Output Current",
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          "name": "Oscillator Initial Accuracy",
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          "name": "Oscillator Voltage Stability",
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        {
          "name": "Sync Output High Level",
          "symbol": "VOH(SYNC)",
          "kind": "electrical",
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          "min": 3.9,
          "typ": 4.35,
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        {
          "name": "Sync Output Low Level",
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        {
          "name": "Sync Input High Level",
          "symbol": "VIH(SYNC)",
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          "unit": "V",
          "min": 3.9,
          "typ": null,
          "max": null,
          "conditions": "Pin 8=0V",
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          "name": "Sync Input Low Level",
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        {
          "name": "Sync Input Current",
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          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.3,
          "max": 1.5,
          "conditions": "Sync Voltage=3.9V, Pin 8=0V",
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        },
        {
          "name": "Error Amp Input Offset Voltage",
          "symbol": "VIO",
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          "unit": "mV",
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        {
          "name": "Error Amp Input Bias Current",
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          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": -0.6,
          "max": -2,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Input Offset Current",
          "symbol": "IIO",
          "kind": "electrical",
          "unit": "nA",
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          "typ": 40,
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          "conditions": "",
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        },
        {
          "name": "Error Amp Common Mode Range",
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          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "VIN=8V~40V; max printed VIN-2V",
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        {
          "name": "Error Amp Open Loop Voltage Gain",
          "symbol": "GVO",
          "kind": "electrical",
          "unit": "dB",
          "min": 80,
          "typ": 105,
          "max": null,
          "conditions": "∆VO=1.2~3V, VCM=2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp CMRR",
          "symbol": "CMRRA",
          "kind": "electrical",
          "unit": "dB",
          "min": 75,
          "typ": 100,
          "max": null,
          "conditions": "VCM=0V~38V, VIN=40V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp PSRR",
          "symbol": "PSRRA",
          "kind": "electrical",
          "unit": "dB",
          "min": 80,
          "typ": 105,
          "max": null,
          "conditions": "VIN=8V~40V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Error Amp Output Sink Current",
          "symbol": "ISINK",
          "kind": "electrical",
          "unit": "mA",
          "min": 2,
          "typ": 6,
          "max": null,
          "conditions": "VID=-15mV~-5V, VPIN 7=1.2V",
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        {
          "name": "Error Amp Output Source Current",
          "symbol": "ISOURCE",
          "kind": "electrical",
          "unit": "mA",
          "min": -0.2,
          "typ": -0.5,
          "max": null,
          "conditions": "VID=15mV~5V, VPIN 7=2.5V",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Error Amp High Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.3,
          "typ": 4.6,
          "max": null,
          "conditions": "RL=(Pin 7) 15kΩ",
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          "source": "datasheet"
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        {
          "name": "Error Amp Low Level Output Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.7,
          "max": 1,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current Sense Amplifier Gain",
          "symbol": "GA",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": 2.75,
          "max": 3,
          "conditions": "VPIN 3=0V, Pin 1 Open (Note 3, 4)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Differential Input Signal",
          "symbol": "VIN(MAX)",
          "kind": "electrical",
          "unit": "V",
          "min": 1.1,
          "typ": 1.2,
          "max": null,
          "conditions": "Pin 1 Open (Note 3), RL (Pin 7)=15kW",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Current Sense Input Offset Voltage",
          "symbol": "VIO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 5,
          "max": 25,
          "conditions": "VPIN 1=0.5V, Pin 7 Open (Note 3)",
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        {
          "name": "Current Sense CMRR",
          "symbol": "CMRRA",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 83,
          "max": null,
          "conditions": "VCM=1V~12V",
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        {
          "name": "Current Sense PSRR",
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          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 84,
          "max": null,
          "conditions": "VIN=8V~40V",
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        },
        {
          "name": "Current Sense Input Bias Current",
          "symbol": "IBIAS",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "conditions": "VPIN 1=0.5V, Pin 7 Open (Note 3)",
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        {
          "name": "Current Sense Input Offset Current",
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          "kind": "electrical",
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          "conditions": "VPIN 1=0.5V, Pin 7 Open (Note 3)",
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          "name": "Delay to Outputs",
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          "name": "Current Limit Offset",
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          "min": 0.45,
          "typ": 0.5,
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          "conditions": "VPIN 3=0V, VPIN 4=0V, Pin 7 Open (Note 3)",
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        {
          "name": "Current Limit Input Bias Current",
          "symbol": "IB",
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          "unit": "µA",
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          "conditions": "VPIN 5=VREF,VPIN 6=0V",
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        {
          "name": "Shutdown Threshold Voltage",
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        {
          "name": "Shutdown Delay to Outputs",
          "symbol": "tD-SHUT",
          "kind": "timing",
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          "max": 600,
          "conditions": "TJ=25°C (Note 2)",
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          "conditions": "VC=40V (Note 5)",
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          "name": "Output Low Level",
          "symbol": "VOL1",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 0.4,
          "conditions": "ISINK=20mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Low Level",
          "symbol": "VOL2",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.4,
          "max": 2.1,
          "conditions": "ISINK=100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output High Level",
          "symbol": "VOH1",
          "kind": "electrical",
          "unit": "V",
          "min": 13,
          "typ": 13.5,
          "max": null,
          "conditions": "ISOURCE=20mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output High Level",
          "symbol": "VOH2",
          "kind": "electrical",
          "unit": "V",
          "min": 12,
          "typ": 13.2,
          "max": null,
          "conditions": "ISOURCE=100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Rise Time",
          "symbol": "tR",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 300,
          "conditions": "CL=1nF, TJ=25°C (Note 2)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Fall Time",
          "symbol": "tF",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": 300,
          "conditions": "CL=1nF, TJ=25°C (Note 2)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Start-Up Threshold",
          "symbol": "VSTART",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 7.7,
          "max": 8,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Supply Current",
          "symbol": "IT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 17,
          "max": 21,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Supply Voltage (Pin 15)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
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        {
          "name": "Collector Supply Voltage (Pin 13)",
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          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Output Current, Source or Sink",
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          "unit": "mA",
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