SY52251AFAC

Secondary Side Synchronous Rectification Converter

SY52251AFAC Secondary Side Synchronous Rectification Converter Datasheet

Parameters
Features
Description

Part number	SY52251AFAC
Topology	Flyback
Integrated FETs(Yes/No)	YES
Integrated FETs type	MOS
Drain current (Conti.) (A)	10
Breakdown voltage (V)	60
Ron (typ) (mΩ)	9
ZVS function	NO
Operation mode	QR/DCM
Dual supply channel	NO
Features
Package	SO8
Operating temperature range(°C)
Functional safety category

Smart Turn off Technology
Secondary-side Synchronous Rectifier Optimized for 5V~12V Systems
Suitable for Discontinuous Mode (DCM), Critical Conduction Mode (CRM)
Suitable for Primary Side Regulation(PSR), Secondary Side Regulation (SSR)
Compact Package: SO8

The SY52251A is a high-performance synchronous rectifier which contains controller and MOSFET devices. This solution not only directly reduces power dissipation of the rectifier but also indirectly reduces primary-side losses, due to compounding of efficiency gains. The DRAIN pin of SY52251A can support 65V voltage stress.

The SY52251A will achieve the ultra-low power consumption when the circuit operates in no load.

The SY52251A is available in a compact SO8 package.

Evaluation Board

Photo of evaluation board
Photo of evaluation board

EVB_SY52251AFAC

EVB File

The EVB_SY52251AFAC is intended for evaluating Secondary Side Synchronous Rectification

Technical Documentation

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