PL9405

{
  "slug": "pl9405",
  "version": "0.1.0",
  "type": "component",
  "description": "POWLICON DC-DC Converters, QFN-48(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "pl9405",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
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    "pl9405.kicad_mod",
    "pl9405.glb",
    "pl9405.step",
    "pl9405.lbr",
    "docs/hero.png",
    "docs/pl9405-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "pl9405-hero.overlay.json",
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  "component": {
    "mpn": "PL9405",
    "manufacturer": "POWLICON",
    "package": "QFN-48(6x6)",
    "pin_count": 49,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917931703488512",
    "parts": {
      "symbol": "pl9405.kicad_sym",
      "footprint": "pl9405.kicad_mod",
      "model_3d": "pl9405-hero.glb",
      "model_3d_plain": "pl9405-etched.glb",
      "model_3d_step": "pl9405-etched.step",
      "model_3d_step_plain": "pl9405.step",
      "lbr": "pl9405.lbr"
    },
    "distributor_links": {
      "lcsc": "C782014"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T20:41:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BST1",
        "type": "passive",
        "description": "Bootstrap pin for the high-side MOSFET driver 1, referenced to SW1."
      },
      {
        "number": "2",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "Battery-side VBAT pin with a 3.6 V to 32 V input range; the pin-table text reads 'Connect to the VBUS rail', which conflicts with the pin name (see review_required)."
      },
      {
        "number": "4",
        "name": "CSP1",
        "type": "input",
        "description": "Positive input of the input-side current sense, paired with CSN1 for average input current limiting against a 40 mV reference."
      },
      {
        "number": "5",
        "name": "CSN1",
        "type": "input",
        "description": "Negative input of the input-side current sense; shorting CSP1 to CSN1 disables the average current loop."
      },
      {
        "number": "6",
        "name": "EN",
        "type": "input",
        "description": "Logic high above the 1.2 V operating threshold enables the converter; below the 1.1 V standby threshold only the LDO remains active, and the pin is pulled up to 4 V internally through 2 MΩ."
      },
      {
        "number": "7",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage, to be connected to AGND at the thermal pad."
      },
      {
        "number": "8",
        "name": "CELLS",
        "type": "input",
        "description": "Resistor divider between VDD and GND programs the battery cell count from 1 to 6 cells."
      },
      {
        "number": "9",
        "name": "OTG",
        "type": "input",
        "description": "Logic low selects battery charging mode and connection to LDO selects battery discharging mode; the OTG high threshold is 1.2 V with 200 mV hysteresis."
      },
      {
        "number": "10",
        "name": "TS",
        "type": "input",
        "description": "Battery temperature sense input; a voltage divider sets the protection trip point in charging or discharging mode."
      },
      {
        "number": "11",
        "name": "VDD",
        "type": "power_out",
        "description": "5.4 V supply for the PL9405 control core."
      },
      {
        "number": "12",
        "name": "VADJ",
        "type": "input",
        "description": "Accepts a 0-2 V analog voltage or PWM signal to program VREF; connecting it to VDD forces VREF to 2 V."
      },
      {
        "number": "13",
        "name": "IADJ",
        "type": "input",
        "description": "Accepts a 0-2 V analog voltage or PWM signal to program IREF; connecting it to VDD forces IREF to 2 V."
      },
      {
        "number": "14",
        "name": "VSET",
        "type": "input",
        "description": "Resistor to GND selects battery cell type (4.2 V, 4.35 V, 4.4 V or 4.5 V) in charging mode, and in discharging mode with OTG above 1.2 V its voltage follows the CSP2-CSN2 difference."
      },
      {
        "number": "15",
        "name": "IREF",
        "type": "power_out",
        "description": "Reference voltage for the input and output current limiting loop."
      },
      {
        "number": "16",
        "name": "VREF",
        "type": "power_out",
        "description": "Reference voltage for the voltage control loop, 2 V in discharging mode and 1.8 V in charging mode when VADJ is tied to VDD."
      },
      {
        "number": "17",
        "name": "BRCOM",
        "type": "output",
        "description": "Battery internal-resistance compensation pin whose voltage is proportional to the CSP1-CSN1 difference, with a resistor to GND programming the compensation."
      },
      {
        "number": "18",
        "name": "LDO",
        "type": "power_out",
        "description": "Low quiescent current 5 V / 55 mA LDO powered from VBAT that stays active to supply the system MCU when EN is low."
      },
      {
        "number": "19",
        "name": "STAT",
        "type": "output",
        "description": "Charging status output in charging mode (OTG low) and power-good output in discharging mode (OTG high)."
      },
      {
        "number": "20",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground, to be connected to PGND at the thermal pad under the IC."
      },
      {
        "number": "21",
        "name": "FREQ",
        "type": "input",
        "description": "Connecting to GND sets 150 kHz and connecting to VDD sets 300 kHz; a divider between VDD and GND sets 600 kHz or 1200 kHz."
      },
      {
        "number": "22",
        "name": "COMP",
        "type": "passive",
        "description": "Error amplifier output of the control loop."
      },
      {
        "number": "23",
        "name": "VREG",
        "type": "input",
        "description": "Resistor divider programs the VBUS regulation voltage; when VBUS is pulled down to this setpoint in charging mode, the loop reduces charge current, and it is inactive in discharging mode."
      },
      {
        "number": "24",
        "name": "FB2",
        "type": "input",
        "description": "VBUS voltage feedback input regulated to 2 V in discharging mode through a resistor divider from VBUS to GND."
      },
      {
        "number": "25",
        "name": "CSN2",
        "type": "input",
        "description": "Negative input of the output-side current sense, paired with CSP2."
      },
      {
        "number": "26",
        "name": "CSP2",
        "type": "input",
        "description": "Positive input of the output-side current sense, paired with CSN2; shorting CSP2 to CSN2 disables the average current loop."
      },
      {
        "number": "27",
        "name": "VBUS",
        "type": "power_in",
        "description": "Connect to the VBUS rail, with a 3.6 V to 32 V operating range."
      },
      {
        "number": "28",
        "name": "HG2",
        "type": "output",
        "description": "High-side MOSFET gate driver output 2, capable of 2 A source and 2 A sink peak current."
      },
      {
        "number": "29",
        "name": "BST2",
        "type": "passive",
        "description": "Bootstrap pin for the high-side driver 2, referenced to SW2."
      },
      {
        "number": "30",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage."
      },
      {
        "number": "31",
        "name": "SW2",
        "type": "passive",
        "description": "Switching node 2 of the power stage."
      },
      {
        "number": "32",
        "name": "LG2",
        "type": "output",
        "description": "Low-side MOSFET gate driver output 2, capable of 2 A source and 2 A sink peak current."
      },
      {
        "number": "33",
        "name": "SW1",
        "type": "passive",
        "description": "Switching node 1 of the power stage."
      },
      {
        "number": "34",
        "name": "SW1",
        "type": "passive",
        "description": "Switching node 1 of the power stage."
      },
      {
        "number": "35",
        "name": "SW1",
        "type": "passive",
        "description": "Switching node 1 of the power stage."
      },
      {
        "number": "36",
        "name": "VCC",
        "type": "power_out",
        "description": "6.6 V supply for the high-side and low-side gate drivers."
      },
      {
        "number": "37",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage."
      },
      {
        "number": "38",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage."
      },
      {
        "number": "39",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage."
      },
      {
        "number": "40",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage."
      },
      {
        "number": "41",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the power stage."
      },
      {
        "number": "42",
        "name": "SW1",
        "type": "passive",
        "description": "Switching node 1 of the power stage."
      },
      {
        "number": "43",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "44",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "45",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "46",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "47",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "48",
        "name": "D1",
        "type": "bidirectional",
        "description": "Power node of VBAT connected to the battery port; it is the power output of the converter in charging mode and the power input in discharging mode."
      },
      {
        "number": "49",
        "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-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 3 is named VBAT, but its pin-table description says 'Connect to the VBUS rail'. The name and des; The pin table lists 2,43,44,45,46,47,48 as one D1 group (the text is wrapped as '2,43,44,45,46,4 7,4; The pin table lists 7,30,37,38,39,40,41 as one PGND group. Each pin is listed individually on that b",
          "exposed pad 49 added from the footprint"
        ],
        "pages_sent": 17,
        "cost_usd": 0.1154,
        "at": "2026-10-18T20:36:43"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917931703488512",
        "pages": 17,
        "sha256": "aed439ba506a8969",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "bf0bef79bbc7120d40af76099525b0ef7f3e95ee437603be53d205054c3efc69",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pl9405-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "sha256": "c757b9e193bc2869e1eb9cff7763038effe5c64e0b04178e07a3d9f6afe3fa88",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}