Maxim MAX5969DETE+

Контроллер (PD)25.5 W802.3at (PoE+), 802.3af (PoE)

Overview

The MAX5969DETE+ provides a complete interface for a powered device (PD) to comply with the IEEE 802.3af/at standard in a power-over-Ethernet (PoE) system. The MAX5969DETE+ provides the PD with a detection signature, classification signature, and an integrated isolation power switch with inrush current control. During the inrush period, the MAX5969DETE+ limits the current to less than 180mA before switching to the higher current limit (720mA to 880mA) when the isolation power MOSFET is fully enhanced. The device features an input UVLO with wide hysteresis and long deglitch time to compensate for twisted-pair cable resistive drop and to assure glitch-free transition during power-on/-off conditions. The MAX5969DETE+ can withstand up to 100V at the input. The MAX5969DETE+ supports a 2-event classification method as specified in the IEEE 802.3at standard and provide a signal to indicate when probed by a Type 2 power sourcing equipment (PSE). The device detects the presence of a wall adapter power source connection and allow a smooth switch over from the PoE power source to the wall power adaptor. The MAX5969DETE+ also provides a power-good (PG) signal, two-step current limit and foldback, overtemperature protection, and di/dt limit. The MAX5969DETE+ is available in a 16-pin, 5mm x 5mm TQFN power package. This device is rated over the -40°C to +85°C extended temperature range.

Features

Applications

• Wireless Access Points
• Security Cameras
• Power over Ethernet
• PoE powered device appliances
• High power (>12.95 W) powered devices
• IEEE 802.3bt (Draft) Compliant Devices
• Lighting
• Power Modules
• Dual Signature PD/Forced UPOE
• 4PPOE