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SY58978UFAC

Production
Single Stage Buck PFC Regulator For LED Lighting
Datasheet
SY58978UFAC Single Stage Buck PFC Regulator For LED Lighting Datasheet
Part number SY58978UFAC
Description QR, buck, 4 drain, no aux winding, with 600V/2 Ω MOS
Topology Buck
Dimming mode Non-dimming
PF (>) 0.9
Input type 120VAC, 230VAC
Iout (max) (A) 0.3
Pout (max) (W) 20
Package SO8
Application Buck, non dimming, PFC
  • Power Factor >0.9
  • 600V MOSFET Integrated
  • Quasi-Resonant Operation
  • Thermal Fold Back
  • Low BOM Cost
  • RoHS Compliant and Halogen Free
  • Compact Package: SO8

SY58978U is a single-stage Buck PFC driver for LED lighting applications. SY58978U adopts the proprietary control architecture to achieve an accurate regulation of LED current, unity power factor. It drives the converter in Quasi-Resonant mode to achieve high efficiency. SY58978U integrates 600V MOSFET inside to save driver space further. SY58978U is available in SO8 package.

Evaluation Board

  • 2026-04-30_112545

    Photo of evaluation board

  • 2026-04-30_112613

    Photo of evaluation board

EVB_SY58978UFAC

The EVB_SY58978UFAC is intended for evaluating Buck Regulator For LED Lighting

Technical Documentation

Title Date
Silergy_Catalog_Q2_2026 2026-06-12