component
UC2843BD1
Public Made by Adomby adom
STMicroelectronics AC-DC Controllers And Regulators, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
← Commit history
README.mdadded+44@@ -0,0 +1,44 @@+# UC2843BD1++**STMicroelectronics** · AC-DC Controllers And Regulators · SO-8++UC2843BD1 from STMicroelectronics, in a SO-8. 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 | COMP | output | Error amplifier output, made available for loop compensation, with the error amplifier output sink current rated at 10 mA maximum. |+| 2 | VFB | input | Inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider; the analog inputs (pins 2 and 3) are rated -0.3 V to 5.5 V. |+| 3 | ISENSE | input | Input receiving a voltage proportional to inductor current, which the PWM uses to terminate output switch conduction; the analog input is rated -0.3 V to 5.5 V and the current-sense maximum input signal is 1 V typical. |+| 4 | RT/CT | passive | Oscillator timing pin, with resistor RT connected to Vref and capacitor CT to ground to program the oscillator frequency and maximum output duty cycle; operation to 500 kHz is possible. |+| 5 | GROUND | power_in | Combined control circuitry and power ground, to which all voltages on the device are referenced. |+| 6 | OUTPUT | output | Drives the gate of a power MOSFET directly, sourcing and sinking peak currents of up to 1 A. |+| 7 | VCC | power_in | Positive supply of the control IC, rated at 30 V maximum from a low-impedance source; the supply is self-limiting when Ii is below 30 mA. |+| 8 | Vref | power_out | Reference output providing a trimmed 5.00 V (4.90 to 5.10 V over temperature for UC384XB; 4.95 to 5.05 V at 25 °C for UC284XB) with up to 50 mA, also supplying charging current for CT through RT. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SO-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `UC2843BD1`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SO-8 (KiCad packages3D, STEP)+- 3D model files: `uc2843bd1-etched.step` / `uc2843bd1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc2843bd1.step` / `uc2843bd1.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952494840299520) (15 pp, sha256 `fedfd7362400f8b3`, retrieved 2026-10-07, 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/uc2843bd1-datasheet.pdf)
page.jsonadded+201@@ -0,0 +1,201 @@+{+ "slug": "uc2843bd1",+ "version": "0.1.0",+ "type": "component",+ "description": "STMicroelectronics AC-DC Controllers And Regulators, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "uc2843bd1",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "uc2843bd1.kicad_sym",+ "uc2843bd1.kicad_mod",+ "uc2843bd1.glb",+ "uc2843bd1.step",+ "uc2843bd1.lbr",+ "docs/hero.png",+ "docs/uc2843bd1-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "uc2843bd1-hero.glb",+ "uc2843bd1-hero.overlay.json"+ ],+ "component": {+ "mpn": "UC2843BD1",+ "manufacturer": "STMicroelectronics",+ "package": "SO-8",+ "pin_count": 8,+ "category": "Power Management (PMIC)",+ "subcategory": "AC-DC Controllers And Regulators",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952494840299520",+ "parts": {+ "symbol": "uc2843bd1.kicad_sym",+ "footprint": "uc2843bd1.kicad_mod",+ "model_3d": "uc2843bd1-hero.glb",+ "model_3d_plain": "uc2843bd1.glb",+ "model_3d_step": "uc2843bd1-etched.step",+ "model_3d_step_plain": "uc2843bd1.step",+ "lbr": "uc2843bd1.lbr"+ },+ "distributor_links": {+ "lcsc": "C1529977",+ "digikey": "497-14805-5-ND",+ "mouser": "511-UC2843BD1"+ },+ "distributor_check": {+ "checked_at": "2026-10-07T23:26:35Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "497-14805-5-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "511-UC2843BD1",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier output, made available for loop compensation, with the error amplifier output sink current rated at 10 mA maximum."+ },+ {+ "number": "2",+ "name": "VFB",+ "type": "input",+ "description": "Inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider; the analog inputs (pins 2 and 3) are rated -0.3 V to 5.5 V."+ },+ {+ "number": "3",+ "name": "ISENSE",+ "type": "input",+ "description": "Input receiving a voltage proportional to inductor current, which the PWM uses to terminate output switch conduction; the analog input is rated -0.3 V to 5.5 V and the current-sense maximum input signal is 1 V typical."+ },+ {+ "number": "4",+ "name": "RT/CT",+ "type": "passive",+ "description": "Oscillator timing pin, with resistor RT connected to Vref and capacitor CT to ground to program the oscillator frequency and maximum output duty cycle; operation to 500 kHz is possible."+ },+ {+ "number": "5",+ "name": "GROUND",+ "type": "power_in",+ "description": "Combined control circuitry and power ground, to which all voltages on the device are referenced."+ },+ {+ "number": "6",+ "name": "OUTPUT",+ "type": "output",+ "description": "Drives the gate of a power MOSFET directly, sourcing and sinking peak currents of up to 1 A."+ },+ {+ "number": "7",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply of the control IC, rated at 30 V maximum from a low-impedance source; the supply is self-limiting when Ii is below 30 mA."+ },+ {+ "number": "8",+ "name": "Vref",+ "type": "power_out",+ "description": "Reference output providing a trimmed 5.00 V (4.90 to 5.10 V over temperature for UC384XB; 4.95 to 5.05 V at 25 °C for UC284XB) with up to 50 mA, also supplying charging current for CT through RT."+ }+ ],+ "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 types are assigned from each pin's function because the datasheet does not give ERC classes; RT/; The Vref 50 mA source capability is taken from the block diagram label (5V 50mA) rather than a tabul; Datasheet is a single family document (UC2842B/3B/4B/5B). The SO-8 variant UC2843BD1 is listed on pa",+ "1/8 pins cited to the wrong page (name found elsewhere): ['5:GROUND@p2']"+ ],+ "pages_sent": 15,+ "cost_usd": 0.0612,+ "at": "2026-10-07T23:26:17"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588952494840299520",+ "pages": 15,+ "sha256": "fedfd7362400f8b3",+ "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": "uc2843bd1.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": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "uc2843bd1-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": "412ee336c89d39bfbccbdc86215114c5487eeaf74a2c12406a70c4c112fd1a95",+ "checked": "2026-10-07",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}