LW A6SG-V2BA-FK0PN0

@@ -0,0 +1,90 @@+---+name: sideled-lw-a6sg+description: How to actually use the ams OSRAM LW A6SG-V2BA-FK0PN0 white SIDELED in a design - which way it emits, which pad is the cathode, how to size the series resistor from VF max, thermal copper, and how to drop the symbol/footprint/3D into KiCad or EAGLE. Trigger on - LW A6SG, A6SG, SIDELED, side-emitting LED, side firing LED, edge-lit LED, white sideled, osram sideled, light pipe LED, backlight LED, place sideled, sideled footprint, sideled resistor, LED series resistor, Q65113A1198.+user-invocable: true+---++# Using the LW A6SG-V2BA-FK0PN0 SIDELED++A white, **side-emitting** LED. Unlike a normal top-fire SMD LED, the light+leaves through the domed lens on a *vertical* face and travels **parallel to+the board**. That single fact drives every placement decision below.++## 1. Orientation is the whole job++In this footprint the emission axis is **−Y** (up on the KiCad canvas at 0°+rotation). F.Fab carries the Ø2.4 mm lens window and an arrow pointing that way+— rotate the part so that arrow points at whatever it is meant to light: a+light pipe entrance, a panel edge, an acrylic diffuser, the next key cap.++The optical axis sits **3.32 mm above the board** (0.80 mm standoff + 2.52 mm+to the lens centre). Match the light pipe's entry height to that number, not to+the top of the package.++Beam is 120° Lambertian, so it fills a wide cone — for a crisp spot you need a+pipe or a mask, not the LED alone.++## 2. Cathode = pad 1++Pad 1 is the **cathode (K)**, marked by the filled silkscreen triangle and, on+the part, by the cathode chamfer on the same side. Pad 2 is the anode (A).+Getting this backwards gives you a dark board, not a dead one — VR max is 5 V,+so a reversed LED on a 3.3 V rail survives but never lights.++## 3. Size the resistor from VF **max**, not typ++At IF = 20 mA the datasheet gives VF = 2.90 min / 3.00 typ / **3.50 max**.+Design to the max or the dimmest parts in a reel will run visibly under-driven:++```+R = (VSUPPLY - 3.50 V) / IF+```++| Supply | IF = 20 mA | IF = 10 mA |+|---|---|---|+| 5.0 V  | 75 Ω   | 150 Ω |+| 3.3 V  | *do not* — only 0.2 V of headroom at VF max; use a constant-current driver |++**On 3.3 V, drive it from a current sink or a boost rail.** A plain resistor+from 3.3 V is at the mercy of the VF bin.++Absolute limits: IF 50 mA max, 5 mA min for a bin-valid colour, 300 mA surge+(t ≤ 10 µs, D = 0.005). Never tie the anode to a fixed rail without limiting.++## 4. Thermal copper is part of the land pattern++The datasheet's recommended pad is oversized on purpose: **> 16 mm² of copper+per pad**. RthJS is 220 K/W, so at 20 mA × 3.0 V ≈ 60 mW the junction sits+~13 K above the solder point — fine, but derate IF above ~60 °C solder-point+temperature (p.13 curve) and give both pads a real copper pour rather than a+thin trace.++## 5. Assembly gotchas++- MSL 2 (JEDEC J-STD-020E) — respect the floor life after opening the bag.+- Reflow peak 245 °C recommended, 250 °C max.+- The datasheet asks for a **nitrogen atmosphere** for best joint quality.+- **Not suitable for ultrasonic cleaning** — it will damage the silicone lens.+- Do not put the lens face against a board edge router path; the dome protrudes+  0.78 mm past the body.++## 6. Dropping it into a tool++```bash+adom-wiki pkg install adonis/lw-a6sg-v2ba-fk0pn0+```++**KiCad** — add the installed directory as a symbol library+(`lw-a6sg-v2ba-fk0pn0.kicad_sym`) and a footprint library+(the `.kicad_mod`). The footprint already points at `lw-a6sg-v2ba-fk0pn0.step`+via `${KIPRJMOD}`, so copy the STEP beside your project or repoint the model+path. Origin is on the land pattern and the part sits on Z = 0 — no offset or+rotation needed.++**EAGLE / Fusion** — `lw-a6sg-v2ba-fk0pn0.lbr` carries the package, the symbol+and the device set with K→1 / A→2 already connected.++**Check before you commit:** the bare `LW A6SG-V2BA-FK0PN0` ordering code is+marked obsolete / not recommended for new designs. The stocked part is the+tape-and-reel variant `LW A6SG-V2BA-FK0PN0-0-20-R33`; same die, same package,+same footprint.