AS1851 IEEE802.3af / 802.3at PoE PD Controller

IEEE802.3af/802.3at (13W-30W) PoE PD Controller

• Digitally Isolated Programmable Power
• PoE PD Controller
• Type 1 IEEE® 802.3af and Type2 IEEE® 802.3at Compliant PD for 13-30W applications
• Automatic PoE-Plus (Type 2) detection in H/W and I2C Modes
• Low Resistance PD Power FET Switch (0.5 ohm 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
• Synchronous Controller with programmable power-FET timing for high efficiency at both light and full load

Key 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