al8861wt-7

@@ -0,0 +1,46 @@+# AL8861WT-7++**Diodes Incorporated** · LED Drivers · TSOT-25++AL8861WT-7 from Diodes Incorporated, in a TSOT-25. 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 | LX | output | Drain of the internal 40V NDMOS power switch. Connects to the external inductor L1 and the freewheeling Schottky diode D1 to form the buck converter switch node. Switch on-resistance is typically 0.2Ω at ILX = 100mA; leakage < 5µA. |+| 2 | GND | power_in | Device ground reference (0V). Return for internal control, driver, and bypass capacitor C1. |+| 3 | VSET | input | Multi-function On/Off, brightness control, and soft-start pin. Floating: internal ~1.4µA source pulls up to 4.5V. Drive below 0.2V to disable output; drive with 0.3V-2.5V DC for analog dimming (5%-100% linear), or with a PWM signal (<500Hz for 1%-100% linear range). A capacitor from VSET to GND extends soft-start (~1.5ms/nF; default 0.1ms). Absolute max 6V; keep below 5V in normal operation. |+| 4 | ISENSE | input | High-side current-sense input. Connect current-set resistor RS between this pin and VIN to define the nominal average LED current: IOUT(NOM) = 0.1V / RS. Mean sense threshold is 100mV (typ) with ±13% hysteresis; input current ~8µA. |+| 5 | VIN | power_in | Input supply voltage, 4.5V to 40V (absolute max 42V). Decouple to GND with a 10µF or larger X7R/X5R ceramic capacitor placed close to the device. Also serves as the high-side reference for the ISENSE current-sense resistor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | TSOT-25 |+| Category | LED-drv |+| Pins | 5 |++## Ordering variants++- `AL8861WT-7`+- `AL8861WT-7Y-13`+- `AL8861WT-7MP-13`++## CAD (KiCad official)++- Symbol: `AL8861WT-7`+- Footprint: `Package_TO_SOT_SMD:TSOT-23-5`+- 3D model: TSOT-25 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AL8861WT-7.pdf) (None pp, sha256 `b1b15e2023cebf87`, 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/al8861wt-7-datasheet.pdf)

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