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UL66CG-06-AB3-R
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UTC Unisonic Tech LED Drivers, SOT-89. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+46@@ -0,0 +1,46 @@+# UL66CG-06-AB3-R++**UTC Unisonic Tech** · LED Drivers · SOT-89++UL66CG-06-AB3-R from UTC Unisonic Tech, in a SOT-89. 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 | OUT | output | Current output pin. Connects to the cathode of the LED string; sinks the regulated constant current (5-60mA) set by REXT. Withstands up to 450V when IOUT=0; drops ~6.5V at IOUT=30mA. |+| 2 | GND | power_in | Ground reference for the device. Return path for internal LDO and current-sense circuitry. |+| 3 | REXT | input | Output current setting pin. An external resistor from REXT to GND programs the constant output current; VREXT is regulated to 0.6V typical (IOUT ≈ 0.6V / REXT). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UTC Unisonic Tech |+| Package | SOT-89 |+| Category | LED-drv |+| Pins | 3 |++## Ordering variants++Same part, different packaging or reel option.++- `UL66CG-06-AB3-R`+- `UL66CG-06-AB3-RAA3`+- `UL66CG-06-AB3-RTN3`++## CAD (KiCad official)++- Symbol: `UL66CG-06-AB3-R`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UTC Unisonic Tech datasheet](docs/ul66cg-06-ab3-r-datasheet.pdf) (4 pp, sha256 `137cf1e91d08342f`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ul66cg-06-ab3-r-datasheet.pdf)
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