LGS63042EP

@@ -0,0 +1,48 @@+# LGS63042EP++**Legend Si** · LED Drivers · ESOP-8++LGS63042EP from Legend Si, in a ESOP-8. 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 | NC | unconnected | No external component required. Datasheet recommends grounding the pin. |+| 2 | GND | power_in | Ground pin. Common return for the controller and switch. Also connects to the exposed thermal pad on the ESOP-8 package. |+| 3 | SW | power_out | Internal power switch node (drain of the integrated 350mΩ low-side MOSFET). Externally connected to the power inductor and Schottky diode. Absolute max SW-to-GND voltage is 60V; max switch current 3A. |+| 4 | SW | power_out | Internal power switch node (second SW pin, tied to pin 3). Provides additional current-handling capacity and heat sinking for the SW node. |+| 5 | VIN/OUT | power_in | Output voltage detection point or input voltage connection point. Connects the LED current sampling resistor Rsense to the CSN end. Acts as an input voltage detection point in buck circuits and as an output voltage connection point in boost and lift applications. Operating input range 3.0V-60V (abs max 60V). |+| 6 | CSN | input | LED current detection pin. Connect to external LED current sampling resistor Rsence. Output current is set by IOUT = (VOUT(VIN) − VCSN) / Rsence, with typical (VOUT − VCSN) = 0.2V. Absolute max voltage: VIN−6V to VIN+0.3V. |+| 7 | OVP | input | Overvoltage protection pin. Connect to the output through a resistor divider (R1 to VOUT, R2 to GND). OVP trip is typically 1.0V (recovery 0.9V); trip output voltage set by VOUT_OVP = (1 + R1/R2) × 1.0V. Absolute max OVP-to-GND voltage: 6V. |+| 8 | EN | input | Enable / dimming input. For LGS63042 (PWM variant) drive with a digital PWM signal at 100Hz-100kHz; duty cycle sets the average LED current per IOUT = (0.2 × D) / Rsence. Rising threshold 0.5V (typ), falling 0.35V (typ), 800kΩ internal pull-down. Absolute max EN-to-GND: 6V. Do not leave floating. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Legend Si |+| Package | ESOP-8 |+| Category | LED-drv |+| Pins | 8 |++## Ordering variants++- `LGS63042EPEP`+- `LGS63042EPB5`++## CAD (KiCad official)++- Symbol: `LGS63042EP`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`+- 3D model: ESOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Legend Si datasheet](docs/lgs63042ep-datasheet.pdf) (22 pp, sha256 `13f24f98441db88d`, retrieved 2026-08-17, tier: lcsc)+- **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/lgs63042ep-datasheet.pdf)

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