# AL8861MP-13

**Diodes Incorporated** · LED Drivers · MSOP-8-EP

AL8861MP-13 from Diodes Incorporated, in a MSOP-8-EP. 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 | ISENSE | input | Current sensing input; connect external resistor RS between VIN and this pin to define nominal average output LED current (IOUTNOM = 0.1/RS). |
| 2 | GND | power_in | Ground (0V) reference. |
| 3 | GND | power_in | Ground (0V) reference. |
| 4 | VSET | input | Multi-function control input for on/off control (disable <0.2V), analog dimming via DC voltage (0.3-2.5V for 5-100% output current range), PWM dimming (recommended <500Hz), and soft-start capacitor connection to GND (additional delay ~1.5ms/nF). |
| 5 | LX | output | Drain of internal 40V NDMOS power switch; high-side switching node in buck converter topology that connects to inductor and freewheeling diode. |
| 6 | LX | output | Drain of internal 40V NDMOS power switch; high-side switching node in buck converter topology that connects to inductor and freewheeling diode. |
| 7 | N/C | unconnected | No internal connection. |
| 8 | VIN | power_in | Input power supply voltage (4.5-40V); must be decoupled to ground with 10μF or higher X7R ceramic capacitor placed close to device. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | MSOP-8-EP |
| Category | LED Drivers |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `AL8861MP-13`
- Footprint: `Package_SO:MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm`
- 3D model: MSOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `al8861mp-13-etched.step` / `al8861mp-13-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `al8861mp-13.step` / `al8861mp-13.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8560080599059746816) (18 pp, sha256 `b1b15e2023cebf87`, retrieved 2026-09-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/al8861mp-13-datasheet.pdf)