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AS1854

13-30W GreenEdge™ PoE PD Controller with HV Isolation, Quad DC-DC, Software Mode

Features Download Datasheet PDF

          • PoE PD Controller

            • Type 1 and Type 2 IEEE® 802.3af & 802.3at Compliant PD
            • Automatic PoE-Plus (Type 2) detection in HW and I2C Modes
            • Low Resistance PD Power FET Switch (0.5Ω typical)
          • Primary-Side DC-DC Controller

            • High-efficiency DC-DC Controller with Digital Optimization
            • Primary-Secondary High-voltage integrated Digital Isolation
            • Programmable Primary Clock Frequency
            • Local-power operation down to 9.5V
          • Secondary-Side Power Outputs

            • Programmable PWM Frequencies synched to External Clock
            • Output #1: Sync Controller with programmable power FET timing for high efficiency at both light and full load
            • Outputs #2 & #3: Buck Regulators w/2A FETs
            • Output #4: DC-DC Controller for Buck, Boost, or LED Boost platform applications
          • EMC Compliance and Protection

            • Slew-rate-controlled power drivers
            • Multi-phased PWM clocking, with External Sync clock option
            • Optional spread-spectrum clocking available for all PWMs
            • Over-current, Under/Over-voltage and Short-circuit Protection
            • High-temperature warning and shutdown
            • Meets IEC 61000-4-2/3/4/5/6, IEC60747, IEC 60950, DIN EN60747-5-2 (VDE0884), & UL1577 requirements for EMC compliance and basic isolation to 2120 VDC (1500 VRMS)
            • 100V Process for PoE transient voltage robustness

Applications

  • Voice-over-IP (VoIP) phones

  • Wireless LAN & WiMAX access points (WAP)

  • Pan, Tilt, Zoom (PTZ) Cameras, IP cameras

  • Thin-client and notebook computers

  • Fiber-to-the-home (FTTH) terminals

  • Point-of-sale (PoS) terminals, RFID readers

Key Electrical Specifications

Vin(Min) Vin(Max) PoE PD Support Control  Topology Number of Output Rails High Voltage Isolation Package
9V 57V 802.3af HW, SW Mode I2C Flyback 4 Integrated QFN-9x9-64L-0.9

 

Typical Application Diagram

AS1854

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