component
SY8745FCC
Public Made by Adomby adom
Silergy Corp LED Drivers, SOIC-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownSY8745FCC
Silergy Corp · LED Drivers · SOIC-8-EP
SY8745FCC from Silergy Corp, in a SOIC-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 | NC | unconnected | No connection. Leave floating or tie to a copper pour per layout guidance. |
| 2 | CF | input | Dimming filter / reference capacitor pin. In analog dimming mode, connect a ~10nF capacitor to filter the reference. Also used to select the dimming mode: when VCF>1.5V the IC operates in PWM dimming mode; when VCF<1.5V it operates in analog dimming mode. Also sets soft-start time via CCF. |
| 3 | LX | output | Switching node / inductor connection. Internal low-side power MOSFET switches this node to GND. Connect the external output inductor from the power input side to LX. Absolute maximum 63V; keep LX copper area small to reduce EMI/noise. |
| 4 | GND | power_in | Ground pin. Also tied to the exposed thermal pad on the SO8E package. Provide a large copper area / ground plane for thermal and noise performance (ΘJA=30°C/W, θJC=10°C/W). |
| 5 | IN | power_in | Input supply pin (10-60V operating, 63V absolute max). Decouple this pin to GND with a 1µF (or larger) X7R ceramic capacitor placed close to IN/GND. Also serves as the positive terminal of the internal current sense (VIN-VSEN). |
| 6 | SEN | input | Negative current sense input. Connects to the LED-side of the external current sense resistor RSEN (RSEN = 0.1V / ILED). Typical current sense limit 100mV (VIN-VSEN). Recommended operating range is VIN ± 0.4V (absolute max VIN ± 0.6V). |
| 7 | EN | input | Enable and PWM dimming input pin. EN rising threshold 1.0V, falling 0.5V. If VEN>8V the IC operates in 0~1V linear (analog) dimming mode with the dimming signal applied to CF. If VEN<8V the IC works in PWM/analog dimming on EN (add a ~10nF cap to CF). Absolute max 63V; IC shuts down ~10ms after EN goes low. |
| 8 | NC | unconnected | No connection. Leave floating or tie to a copper pour per layout guidance. |
| EP | GND | power_in | Exposed thermal pad on the underside of the SO8E package, electrically tied to GND (pin 4). Solder to a large ground copper pour for thermal dissipation (PD=3.3W @ 25°C). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Silergy Corp |
| Package | SOIC-8-EP |
| Category | LED-drv |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
SY8745FCC
CAD (KiCad official)
- Symbol:
SY8745FCC - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOIC-8-EP (KiCad packages3D, STEP)
- 3D model files:
sy8745fcc-etched.step/sy8745fcc-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sy8745fcc.step/sy8745fcc.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Silergy Corp datasheet (9 pp, sha256
99a9efb6f89adc4a, 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).