component
UC3872DW
Public Made by Adomby adom
Texas Instruments Lighting Drivers & Controllers, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# UC3872DW++**Texas Instruments** · Lighting Drivers & Controllers · SOIC-16-300mil++UC3872DW from Texas Instruments, in a SOIC-16-300mil. 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 | BOUT | output | Push-pull N-channel MOSFET drive output, complementary to AOUT, high 50% of the time and switching states on each zero-detect. |+| 2 | AOUT | output | Push-pull N-channel MOSFET drive output, complementary to BOUT, high 50% of the time and switching states on each zero-detect. |+| 3 | VC | power_in | Power supply for the output drivers (absolute max 24V); bypass to ground with a 0.1µF ceramic capacitor. |+| 4 | COMP | output | Error amplifier output; compensation components connect between COMP and INV, and a capacitor to ground limits turn-on current and blanks open lamp detect so the lamp can start. |+| 5 | SS | passive | Soft start pin that limits initial turn-on currents and blanks open lamp detect until soft start completes (soft start threshold 2.9 to 3.8V). |+| 6 | N/C | unconnected | No internal connection. |+| 7 | INV | input | Inverting input of the error amplifier and input to the open lamp detect circuit; outputs are disabled if INV is below the 1V open lamp detect threshold. |+| 8 | CT | passive | Timing capacitor to GND sets the synchronization frequency range; charged with approximately 200µA to form the ramp for the COUT PWM comparator. |+| 9 | ZD | input | Zero-detect input sensing the transformer primary center-tap voltage with a threshold of about 0.5V; connect through a resistor (typically 10k) to limit input current at turn-off. |+| 10 | N/C | unconnected | No internal connection. |+| 11 | REF | power_out | 3V reference output for internal logic; bypass to ground with a 0.01µF ceramic capacitor. |+| 12 | VCC | power_in | Positive supply for the chip, operating range 4.2V to 24V; bypass to ground with a 0.1µF ceramic capacitor. |+| 13 | ENBL | input | Enable input: high enables the device, low shuts the IC down to typically 1µA supply current (input high threshold 2V, low threshold 0.8V). |+| 14 | COUT | output | Directly drives the bulk regulator P-channel MOSFET, synchronized to each zero-detect at twice the AOUT/BOUT frequency, with smooth control up to 100% duty cycle. |+| 15 | PGND | power_in | High-current ground connection for the three output drivers. |+| 16 | GND | power_in | Ground reference point for the internal reference and all thresholds. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16-300mil |+| Category | LED Drivers |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `UC3872DW`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)+- 3D model files: `uc3872dw-etched.step` / `uc3872dw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3872dw.step` / `uc3872dw.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/uc2872) (12 pp, sha256 `4f021ba16ffe9cab`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/uc3872dw-datasheet.pdf)
page.jsonadded+249@@ -0,0 +1,249 @@+{+ "slug": "uc3872dw",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Lighting Drivers & Controllers, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "led drivers",+ "uc3872dw",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "uc3872dw.kicad_sym",+ "uc3872dw.kicad_mod",+ "uc3872dw.glb",+ "uc3872dw.step",+ "uc3872dw.lbr",+ "docs/hero.png",+ "docs/uc3872dw-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "uc3872dw-hero.glb",+ "uc3872dw-hero.overlay.json"+ ],+ "component": {+ "mpn": "UC3872DW",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-16-300mil",+ "pin_count": 16,+ "category": "LED Drivers",+ "subcategory": "Lighting Drivers & Controllers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/uc2872",+ "parts": {+ "symbol": "uc3872dw.kicad_sym",+ "footprint": "uc3872dw.kicad_mod",+ "model_3d": "uc3872dw-hero.glb",+ "model_3d_plain": "uc3872dw.glb",+ "model_3d_step": "uc3872dw-etched.step",+ "model_3d_step_plain": "uc3872dw.step",+ "lbr": "uc3872dw.lbr"+ },+ "distributor_links": {+ "lcsc": "C1519159",+ "digikey": "296-11328-5-ND",+ "mouser": "595-UC3872DW"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T03:29:57Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-11328-5-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-UC3872DW",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "BOUT",+ "type": "output",+ "description": "Push-pull N-channel MOSFET drive output, complementary to AOUT, high 50% of the time and switching states on each zero-detect."+ },+ {+ "number": "2",+ "name": "AOUT",+ "type": "output",+ "description": "Push-pull N-channel MOSFET drive output, complementary to BOUT, high 50% of the time and switching states on each zero-detect."+ },+ {+ "number": "3",+ "name": "VC",+ "type": "power_in",+ "description": "Power supply for the output drivers (absolute max 24V); bypass to ground with a 0.1µF ceramic capacitor."+ },+ {+ "number": "4",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output; compensation components connect between COMP and INV, and a capacitor to ground limits turn-on current and blanks open lamp detect so the lamp can start."+ },+ {+ "number": "5",+ "name": "SS",+ "type": "passive",+ "description": "Soft start pin that limits initial turn-on currents and blanks open lamp detect until soft start completes (soft start threshold 2.9 to 3.8V)."+ },+ {+ "number": "6",+ "name": "N/C",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "7",+ "name": "INV",+ "type": "input",+ "description": "Inverting input of the error amplifier and input to the open lamp detect circuit; outputs are disabled if INV is below the 1V open lamp detect threshold."+ },+ {+ "number": "8",+ "name": "CT",+ "type": "passive",+ "description": "Timing capacitor to GND sets the synchronization frequency range; charged with approximately 200µA to form the ramp for the COUT PWM comparator."+ },+ {+ "number": "9",+ "name": "ZD",+ "type": "input",+ "description": "Zero-detect input sensing the transformer primary center-tap voltage with a threshold of about 0.5V; connect through a resistor (typically 10k) to limit input current at turn-off."+ },+ {+ "number": "10",+ "name": "N/C",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "11",+ "name": "REF",+ "type": "power_out",+ "description": "3V reference output for internal logic; bypass to ground with a 0.01µF ceramic capacitor."+ },+ {+ "number": "12",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply for the chip, operating range 4.2V to 24V; bypass to ground with a 0.1µF ceramic capacitor."+ },+ {+ "number": "13",+ "name": "ENBL",+ "type": "input",+ "description": "Enable input: high enables the device, low shuts the IC down to typically 1µA supply current (input high threshold 2V, low threshold 0.8V)."+ },+ {+ "number": "14",+ "name": "COUT",+ "type": "output",+ "description": "Directly drives the bulk regulator P-channel MOSFET, synchronized to each zero-detect at twice the AOUT/BOUT frequency, with smooth control up to 100% duty cycle."+ },+ {+ "number": "15",+ "name": "PGND",+ "type": "power_in",+ "description": "High-current ground connection for the three output drivers."+ },+ {+ "number": "16",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference point for the internal reference and all thresholds."+ }+ ],+ "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+vision",+ "consensus_model": "claude-opus-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: Pin numbers taken from the SOIC-16/SSOP-16 (DW, M) connection diagram on page 2. The block diagram p",+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 12,+ "cost_usd": 0.3701,+ "at": "2026-10-08T03:29:41"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/uc2872",+ "pages": 12,+ "sha256": "4f021ba16ffe9cab",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "uc3872dw.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "uc3872dw-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "a295d7c62ebdaa7708594ccef5db9925627562b9d2a2cc4cbb047407da37f436",+ "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]"+ }+}