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SY22845FAC (SY50583FAC)

Production
Buck Regulator With CV/CC Control
Datasheet
SY22845FAC Buck Regulator With CV/CC Control Datasheet
Part number SY22845FAC
Pout (max) (W) 4.2
HV startup NO
Iout (max) (A) 0.35
Vout (typ)(V) Adjustable
Breakdown voltage (V) 700
Ron (typ) (mΩ) 7
Switching frequency (min)(kHz) 45
Switching frequency (max)(kHz) 45
Operation mode QR
No load loss (mW) <75
Features CC/CV
Package SO8
Operating temperature range(°C) -40 to 125
Functional safety category
  • Integrated 700V MOSFET
  • CC/CV Control Eliminates Aux-winding
  • Quasi-Resonant (QR) mode to Achieve Low Switching Losses
  • Low Start Up Current: 15µA Typical
  • Maximum Frequency Limit: 45kHz
  • Compact Package: SO8

Evaluation Board

  • EVB22845-1

    Photo of evaluation board

  • EVB22845-2

    Photo of evaluation board

EVB_SY22845

The SY22845 is a PWM controller with several features to enhance performance of Buck converters. It integrates a MOSFET with 700V breakdown voltage to decrease physical volume. Both current and voltage regulation are achieved by the controller. It drives the Buck converter in the quasi-resonant mode to achieve higher efficiency and better EMI performance.

Technical Documentation

Title Date
Silergy_Catalog_Q2_2026 2026-06-12
SO8 2022-05-20