component
LM3549SQX
Public Made by Adomby adom
Texas Instruments LED Drivers, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+61@@ -0,0 +1,61 @@+# LM3549SQX++**Texas Instruments** · LED Drivers · WQFN-24-EP(4x4)++LM3549SQX from Texas Instruments, in a WQFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | NC | unconnected | No internal connection on this pin. |+| 2 | L1 | passive | SMPS inductor positive terminal 1, connected to the 2.2 µH buck-boost inductor in the typical application circuit. |+| 3 | L1 | passive | SMPS inductor positive terminal 2, on the same L1 node as pin 2. |+| 4 | GND_SW | power_in | SMPS (buck-boost converter) ground. |+| 5 | L2 | passive | SMPS inductor negative terminal 1, on the L2 node of the buck-boost converter. |+| 6 | L2 | passive | SMPS inductor negative terminal 2, on the same L2 node as pin 5. |+| 7 | VOUT | power_out | Buck-boost converter output terminal 1. |+| 8 | NC | unconnected | No internal connection on this pin. |+| 9 | VOUT | power_out | Buck-boost converter output terminal 2, on the same VOUT node as pin 7. |+| 10 | R_EN | input | Red output enable input. |+| 11 | VDDS | power_in | Supply voltage pin; the datasheet's input voltage range is 2.7 V to 5.5 V. |+| 12 | G_EN | input | Green output enable input. |+| 13 | B_EN | input | Blue output enable input. |+| 14 | PWM | input | Master fader input; scales the total brightness of the LED outputs. |+| 15 | GND | power_in | Ground reference; all device voltages are referenced to the GND pin. |+| 16 | R_OUT | output | Red LED constant-current driver output. |+| 17 | G_OUT | output | Green LED constant-current driver output. |+| 18 | B_OUT | output | Blue LED constant-current driver output. |+| 19 | FAULT | output | Fault detection interrupt output; active LOW open-drain. |+| 20 | SDA | bidirectional | I2C data line. |+| 21 | SCL | input | I2C clock line. |+| 22 | EN | input | Enable input and I/O reference level. |+| 23 | VDDP | power_in | SMPS supply voltage pin. |+| 24 | NC | unconnected | No internal connection on this pin. |+| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | WQFN-24-EP(4x4) |+| Category | Nixie Tube Driver/LED Driver |+| Pins | 25 |++## CAD (KiCad official)++- Symbol: `LM3549SQX`+- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm`+- 3D model: WQFN-24-EP(4x4) (KiCad packages3D, STEP)+- 3D model files: `lm3549sqx-etched.step` / `lm3549sqx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm3549sqx.step` / `lm3549sqx.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm3549) (28 pp, sha256 `912c4e49951a58aa`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lm3549sqx-datasheet.pdf)
page.jsonadded+300@@ -0,0 +1,300 @@+{+ "slug": "lm3549sqx",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments LED Drivers, WQFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "nixie tube driver-led driver",+ "lm3549sqx",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm3549sqx.kicad_sym",+ "lm3549sqx.kicad_mod",+ "lm3549sqx.glb",+ "lm3549sqx.step",+ "lm3549sqx.lbr",+ "docs/hero.png",+ "docs/lm3549sqx-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "lm3549sqx-hero.glb",+ "lm3549sqx-hero.overlay.json"+ ],+ "component": {+ "mpn": "LM3549SQX",+ "manufacturer": "Texas Instruments",+ "package": "WQFN-24-EP(4x4)",+ "pin_count": 25,+ "category": "Nixie Tube Driver/LED Driver",+ "subcategory": "LED Drivers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm3549",+ "parts": {+ "symbol": "lm3549sqx.kicad_sym",+ "footprint": "lm3549sqx.kicad_mod",+ "model_3d": "lm3549sqx-hero.glb",+ "model_3d_plain": "lm3549sqx.glb",+ "model_3d_step": "lm3549sqx-etched.step",+ "model_3d_step_plain": "lm3549sqx.step",+ "lbr": "lm3549sqx.lbr"+ },+ "distributor_links": {+ "lcsc": "C2679205"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T20:05:15Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": null,+ "status": "no match"+ },+ "mouser": {+ "pn": null,+ "status": "no match"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection on this pin."+ },+ {+ "number": "2",+ "name": "L1",+ "type": "passive",+ "description": "SMPS inductor positive terminal 1, connected to the 2.2 µH buck-boost inductor in the typical application circuit."+ },+ {+ "number": "3",+ "name": "L1",+ "type": "passive",+ "description": "SMPS inductor positive terminal 2, on the same L1 node as pin 2."+ },+ {+ "number": "4",+ "name": "GND_SW",+ "type": "power_in",+ "description": "SMPS (buck-boost converter) ground."+ },+ {+ "number": "5",+ "name": "L2",+ "type": "passive",+ "description": "SMPS inductor negative terminal 1, on the L2 node of the buck-boost converter."+ },+ {+ "number": "6",+ "name": "L2",+ "type": "passive",+ "description": "SMPS inductor negative terminal 2, on the same L2 node as pin 5."+ },+ {+ "number": "7",+ "name": "VOUT",+ "type": "power_out",+ "description": "Buck-boost converter output terminal 1."+ },+ {+ "number": "8",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection on this pin."+ },+ {+ "number": "9",+ "name": "VOUT",+ "type": "power_out",+ "description": "Buck-boost converter output terminal 2, on the same VOUT node as pin 7."+ },+ {+ "number": "10",+ "name": "R_EN",+ "type": "input",+ "description": "Red output enable input."+ },+ {+ "number": "11",+ "name": "VDDS",+ "type": "power_in",+ "description": "Supply voltage pin; the datasheet's input voltage range is 2.7 V to 5.5 V."+ },+ {+ "number": "12",+ "name": "G_EN",+ "type": "input",+ "description": "Green output enable input."+ },+ {+ "number": "13",+ "name": "B_EN",+ "type": "input",+ "description": "Blue output enable input."+ },+ {+ "number": "14",+ "name": "PWM",+ "type": "input",+ "description": "Master fader input; scales the total brightness of the LED outputs."+ },+ {+ "number": "15",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference; all device voltages are referenced to the GND pin."+ },+ {+ "number": "16",+ "name": "R_OUT",+ "type": "output",+ "description": "Red LED constant-current driver output."+ },+ {+ "number": "17",+ "name": "G_OUT",+ "type": "output",+ "description": "Green LED constant-current driver output."+ },+ {+ "number": "18",+ "name": "B_OUT",+ "type": "output",+ "description": "Blue LED constant-current driver output."+ },+ {+ "number": "19",+ "name": "FAULT",+ "type": "output",+ "description": "Fault detection interrupt output; active LOW open-drain."+ },+ {+ "number": "20",+ "name": "SDA",+ "type": "bidirectional",+ "description": "I2C data line."+ },+ {+ "number": "21",+ "name": "SCL",+ "type": "input",+ "description": "I2C clock line."+ },+ {+ "number": "22",+ "name": "EN",+ "type": "input",+ "description": "Enable input and I/O reference level."+ },+ {+ "number": "23",+ "name": "VDDP",+ "type": "power_in",+ "description": "SMPS supply voltage pin."+ },+ {+ "number": "24",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection on this pin."+ },+ {+ "number": "25",+ "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: The WQFN-24-EP hint refers to an exposed thermal pad, but the provided pin table (page 2) lists only; Pin names differ between the pin table (VDDS, VDDP, EN) and the Figure 1 schematic (VDD, VIN). The p",+ "exposed pad 25 added from the footprint"+ ],+ "pages_sent": 6,+ "cost_usd": 0.054,+ "at": "2026-10-08T20:04:44"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm3549",+ "pages": 28,+ "sha256": "912c4e49951a58aa",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 25,+ "described": 25,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "lm3549sqx.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 4,+ 4,+ 0.77+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "f7d256794c4147daf24dcae0554fae18510315e565ad1e239b475be7fef80d8b",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lm3549sqx-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 4,+ 4,+ 0.77+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "fb54cf2054a5e8d6d7b4b5964b6268249875dd0f301330ef638189782b29b364",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}