component
UC3844DTR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
← Commit history
README.mdadded+51@@ -0,0 +1,51 @@+# UC3844DTR++**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-14++UC3844DTR from Texas Instruments, in a SOIC-14. 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 compensation output with internal current limiting; external connection to GROUND forces zero duty cycle. |+| 2 | NC | unconnected | No connection. |+| 3 | VFB | input | Inverting input to error amplifier; used for output voltage regulation feedback control with input voltage 2.5V typical. |+| 4 | NC | unconnected | No connection. |+| 5 | ISENSE | input | Current sense input to PWM comparator with 3V/V gain; maximum input signal 1V at 5V COMP voltage. |+| 6 | NC | unconnected | No connection. |+| 7 | RT/CT | bidirectional | Oscillator timing pin for frequency setting with external RC network; switching frequency fOSC = 1.72 / (RRT × CCT) Hz with timing resistor 5-100kΩ and capacitor 1-100nF. |+| 8 | PWRGND | power_in | Power ground return for high-current gate driver output stage; separate from signal ground GROUND in 14-pin packages. |+| 9 | GROUND | power_in | Signal and analog ground for error amplifier and current detection circuits; serves as power and signal ground where PWRGND unavailable. |+| 10 | OUTPUT | output | Totem-pole gate driver output capable of sourcing and sinking peak current up to 1A to directly drive N-channel MOSFET; actively held low when VCC below UVLO threshold. |+| 11 | VC | power_in | Gate driver bias supply input for totem-pole output stage (14-pin packages only); requires bypass capacitor minimum 10× main switch MOSFET gate capacitance. |+| 12 | VCC | power_in | Main analog controller bias supply input voltage 12-28V recommended; total current equals static quiescent current plus average OUTPUT current (IOUTPUT = Qg × fSW). |+| 13 | NC | unconnected | No connection. |+| 14 | VREF | power_in | Internal precision 5V reference voltage output with ±2% tolerance for UC284x or ±1.8% for UC384x; requires 0.1µF minimum ceramic bypass capacitor with maximum short-circuit current ±30-180mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-14 |+| Category | Power Management (PMIC) |+| Pins | 14 |++## CAD (KiCad official)++- Symbol: `UC3844DTR`+- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`+- 3D model: SOIC-14 (KiCad packages3D, STEP)+- 3D model files: `uc3844dtr-etched.step` / `uc3844dtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3844dtr.step` / `uc3844dtr.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/uc3842) (61 pp, sha256 `0f875fd24cbb5fda`, retrieved 2026-10-05, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/uc3844dtr-datasheet.pdf)
page.jsonadded+196@@ -0,0 +1,196 @@+{+ "slug": "uc3844dtr",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "uc3844dtr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "uc3844dtr.kicad_sym",+ "uc3844dtr.kicad_mod",+ "uc3844dtr.glb",+ "uc3844dtr.step",+ "uc3844dtr.lbr",+ "docs/hero.png",+ "docs/uc3844dtr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "uc3844dtr-hero.glb",+ "uc3844dtr-hero.overlay.json"+ ],+ "component": {+ "mpn": "UC3844DTR",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-14",+ "pin_count": 14,+ "category": "Power Management (PMIC)",+ "subcategory": "AC-DC Controllers And Regulators",+ "datasheet": "https://www.ti.com/cn/lit/gpn/uc3842",+ "parts": {+ "symbol": "uc3844dtr.kicad_sym",+ "footprint": "uc3844dtr.kicad_mod",+ "model_3d": "uc3844dtr-hero.glb",+ "model_3d_plain": "uc3844dtr.glb",+ "model_3d_step": "uc3844dtr-etched.step",+ "model_3d_step_plain": "uc3844dtr.step",+ "lbr": "uc3844dtr.lbr"+ },+ "distributor_links": {+ "lcsc": 702407,+ "digikey": "296-46262-2-ND",+ "mouser": "595-UC3844DTR"+ },+ "distributor_check": {+ "checked_at": "2026-10-05T20:10:37Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-46262-2-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-UC3844DTR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier compensation output with internal current limiting; external connection to GROUND forces zero duty cycle."+ },+ {+ "number": "2",+ "name": "NC",+ "type": "unconnected",+ "description": "No connection."+ },+ {+ "number": "3",+ "name": "VFB",+ "type": "input",+ "description": "Inverting input to error amplifier; used for output voltage regulation feedback control with input voltage 2.5V typical."+ },+ {+ "number": "4",+ "name": "NC",+ "type": "unconnected",+ "description": "No connection."+ },+ {+ "number": "5",+ "name": "ISENSE",+ "type": "input",+ "description": "Current sense input to PWM comparator with 3V/V gain; maximum input signal 1V at 5V COMP voltage."+ },+ {+ "number": "6",+ "name": "NC",+ "type": "unconnected",+ "description": "No connection."+ },+ {+ "number": "7",+ "name": "RT/CT",+ "type": "bidirectional",+ "description": "Oscillator timing pin for frequency setting with external RC network; switching frequency fOSC = 1.72 / (RRT × CCT) Hz with timing resistor 5-100kΩ and capacitor 1-100nF."+ },+ {+ "number": "8",+ "name": "PWRGND",+ "type": "power_in",+ "description": "Power ground return for high-current gate driver output stage; separate from signal ground GROUND in 14-pin packages."+ },+ {+ "number": "9",+ "name": "GROUND",+ "type": "power_in",+ "description": "Signal and analog ground for error amplifier and current detection circuits; serves as power and signal ground where PWRGND unavailable."+ },+ {+ "number": "10",+ "name": "OUTPUT",+ "type": "output",+ "description": "Totem-pole gate driver output capable of sourcing and sinking peak current up to 1A to directly drive N-channel MOSFET; actively held low when VCC below UVLO threshold."+ },+ {+ "number": "11",+ "name": "VC",+ "type": "power_in",+ "description": "Gate driver bias supply input for totem-pole output stage (14-pin packages only); requires bypass capacitor minimum 10× main switch MOSFET gate capacitance."+ },+ {+ "number": "12",+ "name": "VCC",+ "type": "power_in",+ "description": "Main analog controller bias supply input voltage 12-28V recommended; total current equals static quiescent current plus average OUTPUT current (IOUTPUT = Qg × fSW)."+ },+ {+ "number": "13",+ "name": "NC",+ "type": "unconnected",+ "description": "No connection."+ },+ {+ "number": "14",+ "name": "VREF",+ "type": "power_in",+ "description": "Internal precision 5V reference voltage output with ±2% tolerance for UC284x or ±1.8% for UC384x; requires 0.1µF minimum ceramic bypass capacitor with maximum short-circuit current ±30-180mA."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: VC pin (11) is only present in 14-pin SOIC and CFP packages, not in 8-pin packages; confirmed correc"+ ],+ "pages_sent": 38,+ "cost_usd": 0.3393,+ "at": "2026-10-05T20:10:22"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/uc3842",+ "pages": 61,+ "sha256": "0f875fd24cbb5fda",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 14,+ "described": 14,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}