# LM3414SDX

**Texas Instruments** · LED Drivers · SON-8-EP(3x3)

LM3414SDX from Texas Instruments, in a SON-8-EP(3x3). 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 | VCC | power_out | Internal regulator output that must be bypassed to ground with a ceramic capacitor of at least 1 µF. |
| 2 | PGND | power_in | Power ground and reference point for all stated voltages, which must be externally connected to EP and GND. |
| 3 | IADJ | input | Average output current adjustment pin; a resistor RIADJ from this pin to ground sets the average output current. |
| 4 | GND | power_in | Analog ground for internal circuitry, which must be connected to PGND external to the package. |
| 5 | FS | input | Switching frequency setting pin; a resistor RFS from this pin to ground sets the switching frequency. |
| 6 | DIM | input | PWM dimming control pin where a logic-level PWM signal sets the intended brightness of the LED string. |
| 7 | LX | output | Drain of the integrated N-MOSFET switch, connected to the output inductor and the anode of the Schottky diode. |
| 8 | VIN | power_in | Input voltage pin rated 4.5 V to 42 V for LM3414 (4.5 V to 65 V for LM3414HV). |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SON-8-EP(3x3) |
| Category | LED Drivers |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `LM3414SDX`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: SON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `lm3414sdx-etched.step` / `lm3414sdx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm3414sdx.step` / `lm3414sdx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm3414) (35 pp, sha256 `50a54d53a0e6ecb0`, retrieved 2026-10-11, tier: lcsc)
- **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/lm3414sdx-datasheet.pdf)