component
sy8705bfcc
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Silergy Corp LED Drivers, SOIC-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Silergy Corp · LED Drivers · SOIC-8-EP
SY8705BFCC 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 connect. Leave floating or tie to GND per layout preference; not internally bonded. |
| 2 | TM | input | Test mode pin. Must be tied to GND in the real application. Absolute maximum 4V; recommended operating 0-3.6V. |
| 3 | LX | output | Inductor switching node. Connects to the external buck inductor and freewheeling diode. Rated -0.3V to 33V (transients: -3V<20ns to +36V<20ns). |
| 4 | GND | power_in | Ground pin. Return for control circuitry and low-side MOSFET. Maximize PCB copper area on this pin for best thermal and noise performance. |
| 5 | IN | power_in | Input supply pin, 2.5V to 30V (abs max 33V). Also serves as the positive current-sense pin (VIN-SEN sense limit 100mV typ). Decouple to GND with a 1µF ceramic capacitor placed close to the pin. |
| 6 | SEN | input | Negative current sense pin. Connects to the low side of the external sense resistor RSEN. LED current is set by ILED (A) = 0.1V / RSEN (Ω); sense-limit range VIN-SEN 96/100/104 mV. Rated VIN ± 0.7V (abs max), VIN ± 0.5V (recommended). |
| 7 | EN | input | Enable and PWM dimming control input. Pull high (VENH ≥ 1.5V) to enable the IC; VENL ≤ 0.4V disables it. Accepts a PWM dimming signal with a recommended frequency range of 20kHz to 1MHz. Rated 2.5V to 30V (recommended); abs max 33V. |
| 8 | NC | unconnected | No connect. Leave floating or tie to GND per layout preference; not internally bonded. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Silergy Corp |
| Package | SOIC-8-EP |
| Category | LED-drv |
| Pins | 8 |
Ordering variants
SY8705BFCC
CAD (KiCad official)
- Symbol:
SY8705BFCC - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOIC-8-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Silergy Corp datasheet (None pp, sha256
04b0750c1cfc4494, 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).