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AS1844

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

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&at HW Flyback 4 Integrated QFN-9x9-64L-0.9

 

Typical Application Diagram

AS1844

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