component
UC3845B
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UMW AC-DC Controllers and Regulators, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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page.json+116−8@@ -1,13 +1,126 @@ {+ "schema_version": 1,+ "type": "component", "slug": "uc3845b",+ "title": "UC3845B",+ "brief": "UMW AC-DC Controllers and Regulators, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.", "version": "0.1.0",- "type": "component",- "description": "UMW AC-DC Controllers and Regulators, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "license": "CC-BY-SA-4.0", "tags": [ "component", "pmic", "uc3845b" ],+ "component": {+ "mpn": "UC3845B",+ "manufacturer": "UMW",+ "package": "SOP-8",+ "pin_count": 8,+ "category": "PMIC",+ "subcategory": "AC-DC Controllers and Regulators",+ "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e3d63309cbe1c8f3cf586cb6af3a803e.pdf",+ "parts": {+ "symbol": "uc3845b.kicad_sym",+ "footprint": "uc3845b.kicad_mod",+ "model_3d": "uc3845b.glb",+ "model_3d_step": "uc3845b.step",+ "lbr": "uc3845b.lbr"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "COMP",+ "type": "output",+ "description": "Error Amplifier output pin, used for external loop compensation. Typical high output voltage 5-6 V, low output 0.8-1.1 V (with 15 k\u03a9 load)."+ },+ {+ "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; internal reference at 2.5 V (typ). Input bias current -0.1 \u00b5A typ."+ },+ {+ "number": "3",+ "name": "ISENSE",+ "type": "input",+ "description": "Current sense input. A voltage proportional to the inductor current (up to ~1 V max) is applied here; the PWM comparator uses this to terminate output switch conduction each cycle. Input voltage range -0.3 to 5.5 V max."+ },+ {+ "number": "4",+ "name": "RT/CT",+ "type": "passive",+ "description": "Oscillator timing pin. Oscillator frequency and maximum output duty cycle are set by connecting a timing resistor RT from VREF to this pin and a timing capacitor CT from this pin to ground. Operating frequency up to 500 kHz."+ },+ {+ "number": "5",+ "name": "GND",+ "type": "power_in",+ "description": "Combined control circuitry and power ground return for the IC."+ },+ {+ "number": "6",+ "name": "OUT",+ "type": "output",+ "description": "Totem-pole gate drive output for an external power MOSFET. Sources/sinks peak currents up to 1 A. VOH \u2248 13-13.5 V, VOL \u2248 0.08-1.4 V depending on load; rise/fall time ~35-45 ns into 1 nF."+ },+ {+ "number": "7",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply for the IC. UVLO start threshold 8.4 V typ (7.8-9 V), min operating 7.6 V typ (7-8.2 V) after turn-on. Absolute max 30 V; zener clamp \u2248 30-38 V at 25 mA. Operating supply current 13 mA typ; start-up current 0.5 mA typ."+ },+ {+ "number": "8",+ "name": "VREF",+ "type": "power_out",+ "description": "Internal 5 V reference output (4.9-5.1 V), used to charge timing capacitor CT through timing resistor RT and to bias external circuitry. Short-circuit current typically -100 mA (limited to -180 mA max). Load current 1-20 mA."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://datasheet.lcsc.com/datasheet/pdf/e3d63309cbe1c8f3cf586cb6af3a803e.pdf",+ "pages": 13,+ "sha256": "562bc6cb07a3fb91",+ "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"+ }+ },+ "metadata": {+ "specs": {+ "Manufacturer": "UMW",+ "Package": "SOP-8",+ "Category": "PMIC",+ "Pins": "8"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "uc3845b"+ ],+ "discovery_pitch": "UC3845B (UMW) component page with datasheet-verified CAD.",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }, "dependencies": {}, "hero": { "type": "image",@@ -25,10 +138,5 @@ "docs/uc3845b-datasheet.pdf", "viewers/symbol.html", "viewers/footprint.html"- ],- "visibility": "public",- "author": {- "name": "Ray",- "email": "[email protected]"- }+ ] }