SQ33608WSQ

IEEE 802.3af/at/bt Compliant PoE PD Interface with Highly Integrated Active Clamp PWM Controller

Parameters
Features
Description

Part number	SQ33608WSQ
PoE standards	af/at/bt
Vin (min) (V)	15
Vin (max) (V)	57
PD (max)(W)	<71W
Ron (typ) (mΩ)	60
Power conversion FETs integrated
Breakdown voltage (V)
Features	ACF,PCM,Voltage mode control,Cycle-by-cycle current limit,Hiccup OCP,Hiccup SCP,Hiccup OTP
Package	QFN6×5-44
Operating temperature range(°C)	-40 to 125
Functional safety category

Fully Compatible with 802.3af/at/bt Specifications
71.3W Maximum Power
100V 60mΩ PD Integrated Pass Switch
5-Event Classification Sensing
Enhanced Surge Protection (100V Absolute Maximum)
Integrated Signature Resistor
Auxiliary Adaptor ORing Support
Integrated 120V High Voltage Startup Circuit
Programmable Soft-Start
Programmable Oscillator with 1MHz Maximum Frequency
Adaptive Delay Time Control for Improved Efficiency
Cycle-by-Cycle Peak Current Limiting
Externally Programmable Thermal Shutdown
Programmable Line Undervoltage Lockout (UVLO) with Adjustable Hysteresis
Hiccup Protection for OCP, SCP, OTP , OVP and Thermal Shutdown

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Evaluation Board

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Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_SQ33608WSQ

The EVB_SQ33608WSQ is intended for evaluating IEEE 802.3af/at/bt Compliant PoE PD Interface with Highly Integrated Active Clamp PWM Controller

Technical Documentation

Title	Date
Silergy_Catalog_Q2_2026	2026-06-12