SY23216TQQ (SQ34815TQQ)

IEEE 802.3 af/at-Compatible PoE Power Device Interface with 13W High-frequency Flyback Converter

Parameters
Features
Description

Part number	SY23216TQQ
PoE standards	af
Vin (min) (V)	11
Vin (max) (V)	57
PD (max)(W)	<13W
Ron (typ) (mΩ)	450
Power conversion FETs integrated	YES
Breakdown voltage (V)	180V/0.65Ω
Features	PSR/SSR Flyback,Hiccup UVP,Hiccup SCP,Hiccup OCP,Hiccup OVP,Hiccup OTP
Package	QFN4×5-28
Operating temperature range(°C)	-40 to 125
Functional safety category

Supports the IEEE 802.3 af/at Standard
100V, 0.45Ω Hot-swap Switch
Adaptor ORing Support
Power up to 13W(Input) PDs
Auto-maintain Power Signature
Primary Side Regulate Flyback with QR-mode Operation and PWM/PFM Control
Secondary Side Regulate Flyback with Selectable Frequency and Internal Slope Compensation
Integrate 180V,0.65Ω MOSFET for Converter
RoHS Compliant and Halogen Free
Compact Package: QFN4x5-28

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Evaluation Board

Photo of evaluation board
Photo of evaluation board

EVB_SY23216TQQ

The EVB_SY23216TQQ is intended for evaluating IEEE 802.3 af/at-Compatible PoE Power Device Interface with 13W High-frequency PSR Flyback Converter

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12