# LY3016

**Lingyang Micro** · LED Drivers · SOP-8

LY3016 from Lingyang Micro, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | LED1 | output | LED output drive control terminal; the internal switch drives up to 1.5A, and the output shuts off if the LED1 current exceeds 3A. |
| 2 | GND | power_in | Ground connection. |
| 3 | KEY | input | Push-button input used to switch lighting modes; a press of 2.5 s or longer starts SOS mode and a single click turns SOS off. |
| 4 | 5V | power_in | USB 5V charging input; absolute maximum is 5.5 V and the operating input range is 4.5 V to 5.5 V, with a 2 Ω series resistor recommended on the bypass capacitor. |
| 5 | BAT | power_in | Battery terminal for the external lithium cell; the cell is charged to a preset 3.6 V float voltage, recharge restarts below 3.45 V, and over-discharge shutdown occurs at 2.3 V. |
| 6 | FUN | input | LED cycle mode select pin: connecting it to BAT, leaving it floating, or connecting it to GND selects mode 1, mode 2, or mode 3 respectively. |
| 7 | GND | power_in | Ground connection. |
| 8 | LED2 | output | Indicator output: flashes at 1 Hz while charging and stays on when full, flashes every 4 s for low-battery warning at 2.8 V, and stays on 4 s after a short-circuit protection event. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Lingyang Micro |
| Package | SOP-8 |
| Category | LED Drivers |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LY3016`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ly3016-etched.step` / `ly3016-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ly3016.step` / `ly3016.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Lingyang Micro datasheet](docs/ly3016-datasheet.pdf) (6 pp, sha256 `a71c02fce2077dd5`, retrieved 2026-10-09, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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/ly3016-datasheet.pdf)