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AS1831

13W GreenEdge™ IEEE802.3af PoE PD Controller with HV Isolation

Features Download Datasheet PDF

          • Digitally Isolated Programmable Power

          • PoE PD Controller

            • Type 1 and Type 2 IEEE® 802.3af & 802.3at Compliant PD (AS1851), Type 1 only (AS1831)
            • Automatic PoE-Plus (Type 2) detection in HW and I2C Modes (AS1851 only)
            • 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 Sync Power Outputs

            • Synchronous Controller with programmable power-FET timing for high efficiency at both light and full load
            • Programmable PWM Frequencies synched to External Clock
          • Power Management

            • Hardware programmable start-up power sequencing
            • Primary-side power monitoring & control from Secondary-side
            • Individual output Power-Good management
            • Voltage margining for each output
            • Primary GPIO/ADC controlled via Secondary GPIO or I2C
            • 5V µC-compatible with interrupt on alarm services
            • Programmable watchdog timer
          • EMC Compliance and Protection

            • Slew-rate-controlled power drivers
            • External PWM sync clock option
            • Optional spread-spectrum clocking, SW controlled
            • 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 1 Integrated QFN-9x9-64L-0.9

 

Typical Application Diagram

AS1831

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