component
UC2845D8TR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+45@@ -0,0 +1,45 @@+# UC2845D8TR++**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-8++UC2845D8TR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | COMP | output | Error amplifier compensation pin accepting external compensation networks; internal current limiting permits forcing COMP to GROUND to control zero duty cycle. |+| 2 | VFB | input | Inverting input of internal error amplifier for controlling power supply converter voltage feedback loop to achieve stability; maintain shortest possible leads and minimal stray capacitance. |+| 3 | ISENSE | input | Primary side current sensing input connected to current sense resistor with maximum input voltage of 1V; PWM comparator uses this signal to terminate OUTPUT switch turn-on. |+| 4 | RT/CT | bidirectional | Oscillator timing pin where timing resistor RRT (≥5kΩ) connects to VREF and timing capacitor CCT connects to GROUND to set switching frequency from 100kHz to 500kHz per fOSC = 1.72/(RRT×CCT). |+| 5 | GROUND | power_in | Analog signal ground and power return path; for packages without separate PWRGND, this pin serves as both power and signal ground. |+| 6 | OUTPUT | output | Gate driver output capable of sourcing and sinking ±1A peak current to directly drive external MOSFET; actively held low when VCC is below UVLO turn-on threshold. |+| 7 | VCC | power_in | Power supply input for analog controller bias requiring 0.1µF minimum bypass capacitor directly connected to GROUND with minimum wire length; recommended voltage 12V to 28V with maximum static current 17mA at 15V. |+| 8 | VREF | power_in | Internal 5V reference voltage (±2% tolerance for UC284x) used to supply charging current to oscillator timing capacitor; requires 0.1µF minimum ceramic bypass capacitor placed as close as possible to pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `UC2845D8TR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)+- 3D model files: `uc2845d8tr-etched.step` / `uc2845d8tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc2845d8tr.step` / `uc2845d8tr.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/uc2845) (61 pp, sha256 `0f875fd24cbb5fda`, retrieved 2026-09-22, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/uc2845d8tr-datasheet.pdf)
page.jsonadded+141@@ -0,0 +1,141 @@+{+ "slug": "uc2845d8tr",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power management (pmic)",+ "uc2845d8tr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "uc2845d8tr.kicad_sym",+ "uc2845d8tr.kicad_mod",+ "uc2845d8tr.glb",+ "uc2845d8tr.step",+ "uc2845d8tr.lbr",+ "docs/hero.png",+ "docs/uc2845d8tr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "UC2845D8TR",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-8",+ "pin_count": 8,+ "category": "Power Management (PMIC)",+ "subcategory": "AC-DC Controllers And Regulators",+ "datasheet": "https://www.ti.com/cn/lit/gpn/uc2845",+ "parts": {+ "symbol": "uc2845d8tr.kicad_sym",+ "footprint": "uc2845d8tr.kicad_mod",+ "model_3d": "uc2845d8tr-etched.glb",+ "model_3d_plain": "uc2845d8tr.glb",+ "model_3d_step": "uc2845d8tr-etched.step",+ "model_3d_step_plain": "uc2845d8tr.step",+ "lbr": "uc2845d8tr.lbr"+ },+ "distributor_links": {+ "lcsc": "C456279"+ },+ "pins": [+ {+ "number": "1",+ "name": "COMP",+ "type": "output",+ "description": "Error amplifier compensation pin accepting external compensation networks; internal current limiting permits forcing COMP to GROUND to control zero duty cycle."+ },+ {+ "number": "2",+ "name": "VFB",+ "type": "input",+ "description": "Inverting input of internal error amplifier for controlling power supply converter voltage feedback loop to achieve stability; maintain shortest possible leads and minimal stray capacitance."+ },+ {+ "number": "3",+ "name": "ISENSE",+ "type": "input",+ "description": "Primary side current sensing input connected to current sense resistor with maximum input voltage of 1V; PWM comparator uses this signal to terminate OUTPUT switch turn-on."+ },+ {+ "number": "4",+ "name": "RT/CT",+ "type": "bidirectional",+ "description": "Oscillator timing pin where timing resistor RRT (≥5kΩ) connects to VREF and timing capacitor CCT connects to GROUND to set switching frequency from 100kHz to 500kHz per fOSC = 1.72/(RRT×CCT)."+ },+ {+ "number": "5",+ "name": "GROUND",+ "type": "power_in",+ "description": "Analog signal ground and power return path; for packages without separate PWRGND, this pin serves as both power and signal ground."+ },+ {+ "number": "6",+ "name": "OUTPUT",+ "type": "output",+ "description": "Gate driver output capable of sourcing and sinking ±1A peak current to directly drive external MOSFET; actively held low when VCC is below UVLO turn-on threshold."+ },+ {+ "number": "7",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply input for analog controller bias requiring 0.1µF minimum bypass capacitor directly connected to GROUND with minimum wire length; recommended voltage 12V to 28V with maximum static current 17mA at 15V."+ },+ {+ "number": "8",+ "name": "VREF",+ "type": "power_in",+ "description": "Internal 5V reference voltage (±2% tolerance for UC284x) used to supply charging current to oscillator timing capacitor; requires 0.1µF minimum ceramic bypass capacitor placed as close as possible to pin."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 61,+ "cost_usd": 0.5493,+ "at": "2026-09-22T06:05:04"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/uc2845",+ "pages": 61,+ "sha256": "0f875fd24cbb5fda",+ "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"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}