component
SY5881FAC
Public Unreviewedby Ray
Silergy Corp LED Drivers, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSY5881FAC
Silergy Corp · LED Drivers · SOP-8
SY5881FAC from Silergy Corp, in a SOP-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 | COMP | passive | Loop compensation pin. Connect an RC network across this pin and ground to stabilize the control loop. |
| 2 | ZCS | input | Inductor current zero-crossing detection pin. Receives the auxiliary winding voltage by a resistor divider and detects the inductor current zero crossing point. Also provides over voltage protection and line regulation modification; if voltage exceeds V_ZCS,OVP (1.5V typ) the IC enters OVP mode. |
| 3 | ISEN | input | Current sense pin. Connect to the source of the primary switch through a sense resistor to GND. Current limit reference voltage is 750mV; internal reference is 300mV (R_S = V_REF / (2 x I_OUT)). |
| 4 | GND | power_in | Ground pin. Return for all internal circuitry and the reference for the current sense resistor. |
| 5 | DRV | output | Gate driver pin. Connects to the gate of the primary MOSFET. Typical gate driver voltage 12V with 200mA source and 650mA sink current capability. Absolute max 25V. |
| 6 | VIN | power_in | Power supply pin. Also provides output over-voltage protection along with ZCS pin. Turn-on threshold 20V typ, turn-off 8.0V typ. Recommended operating range 8V-20V; absolute max 25V; startup current 34uA typ. |
| 7 | ADIM | input | Analog dimming input. Bypass this pin to GND with enough capacitance to hold internal voltage reference. ADIM enable ON threshold 75mV, OFF 37mV. Absolute max 15V. |
| 8 | PWM | input | PWM dimming input pin. Detects the PWM dimming signal. PWM ON voltage max 1.2V; PWM OFF voltage min 0.5V. Absolute max 23V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Silergy Corp |
| Package | SOP-8 |
| Category | LED-drv |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
SY5881FAC
CAD (KiCad official)
- Symbol:
SY5881FAC - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Silergy Corp datasheet (18 pp, sha256
5dda5c8ce0498ca6, 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).