component
UC3845B
Public Made by Adomby adom
UMW AC-DC Controllers and Regulators, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
← Commit history
orderable attributes: rebuild .lbr with adom-lbr 2.18.0 so MPN, MANUFACTURER and the distributor part numbers reach <technology> (LCSC_PN C347460). The published library carried no attributes at all, so a BOM had nothing to buy from. Distributor PNs matched on exact MPN AND corroborating manufacturer.
2 files changed
+27−7
page.json+7−5@@ -26,19 +26,21 @@ "model_3d_step": "uc3845b.step", "lbr": "uc3845b.lbr" },- "distributor_links": {},+ "distributor_links": {+ "lcsc": "C347460"+ }, "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 kΩ load)."+ "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 µA typ."+ "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",@@ -62,13 +64,13 @@ "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 ≈ 13-13.5 V, VOL ≈ 0.08-1.4 V depending on load; rise/fall time ~35-45 ns into 1 nF."+ "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 ≈ 30-38 V at 25 mA. Operating supply current 13 mA typ; start-up current 0.5 mA typ."+ "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",
uc3845b.lbr+20−2@@ -62,6 +62,18 @@ <smd name="6" x="2.4750" y="-0.6350" dx="1.9500" dy="0.6000" layer="1"/> <smd name="7" x="2.4750" y="0.6350" dx="1.9500" dy="0.6000" layer="1"/> <smd name="8" x="2.4750" y="1.9050" dx="1.9500" dy="0.6000" layer="1"/>+ <polygon width="0.1200" layer="21">+ <vertex x="-2.6000" y="2.4700"/>+ <vertex x="-2.8400" y="2.8000"/>+ <vertex x="-2.3600" y="2.8000"/>+ </polygon>+ <polygon width="0.1000" layer="51">+ <vertex x="-0.9750" y="2.4500"/>+ <vertex x="1.9500" y="2.4500"/>+ <vertex x="1.9500" y="-2.4500"/>+ <vertex x="-1.9500" y="-2.4500"/>+ <vertex x="-1.9500" y="1.4750"/>+ </polygon> <wire x1="-2.0600" y1="2.5600" x2="2.0600" y2="2.5600" width="0.1200" layer="21"/> <wire x1="-2.0600" y1="2.4650" x2="-2.0600" y2="2.5600" width="0.1200" layer="21"/> <wire x1="-2.0600" y1="-2.5600" x2="-2.0600" y2="-2.4650" width="0.1200" layer="21"/>@@ -70,7 +82,7 @@ <wire x1="2.0600" y1="-2.5600" x2="-2.0600" y2="-2.5600" width="0.1200" layer="21"/> <text x="0" y="3.480" size="1.27" layer="25" align="bottom-center">>NAME</text> <text x="0" y="-3.480" size="1.27" layer="27" align="top-center">>VALUE</text>-<!--adom-pin1--><polygon width="0.0500" layer="21"><vertex x="-2.6000" y="2.4700"/><vertex x="-2.8400" y="2.8000"/><vertex x="-2.3600" y="2.8000"/></polygon></package>+</package> </packages> <symbols> <symbol name="UC3845B">@@ -108,7 +120,13 @@ <connect gate="G$1" pin="OUT" pad="6"/> <connect gate="G$1" pin="GND" pad="5"/> </connects>- <technologies><technology name=""/></technologies>+ <technologies>+ <technology name="">+ <attribute name="MPN" value="UC3845B" constant="no"/>+ <attribute name="MANUFACTURER" value="UMW" constant="no"/>+ <attribute name="LCSC_PN" value="C347460" constant="no"/>+ </technology>+ </technologies> </device> </devices> </deviceset>