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MAX5982AETE+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX5982AETE+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 17 page IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated 70W High-Power MOSFET _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. General Description The MAX5982A/MAX5982B/MAX5982C provide a com- plete interface for a powered device (PD) to comply with the IEEE® 802.3af/at standard in a power-over-Ethernet (PoE) system. The MAX5982A/MAX5982B/MAX5982C provide the PD with a detection signature, classifica- tion signature, and an integrated isolation power switch with inrush current control. During the inrush period, the MAX5982A/MAX5982B/MAX5982C limit the current to less than 182mA before switching to the higher cur- rent limit (1700mA to 2100mA) when the isolation power MOSFET is fully enhanced. The devices feature 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 condi- tions. The MAX5982A/MAX5982B/MAX5982C can with- stand up to 100V at the input. The MAX5982A/MAX5982B/MAX5982C support 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 devices detect the presence of a wall adapter power source connection and allow a smooth switchover from the PoE power source to the wall power adapter. The MAX5982A/MAX5982B/MAX5982C also provide a power-good (PG) signal, two-step current limit and fold- back, overtemperature protection, and di/dt limit. A sleep mode feature in the MAX5982A/MAX5982B provides low power consumption while supporting Maintain Power Signature (MPS). An ultra-low-power sleep mode feature in the MAX5982A/MAX5982B further reduces power consumption while still supporting MPS. The MAX5982A/ MAX5982B also feature an LED driver that is automati- cally activated during sleep mode. The MAX5982A/MAX5982B/MAX5982C are available in a 16-pin, 5mm x 5mm, TQFN power package. These devices are rated over the -40NC to +85NC extended temperature range. Features S Sleep Mode and Ultra-Low-Power Sleep (MAX5982A/MAX5982B) S IEEE 802.3af/at Compliant S 2-Event Classification or an External Wall Adapter Indicator Output S Simplified Wall Adapter Interface S PoE Classification 0–5 S 100V Input Absolute Maximum Rating S Inrush Current Limit of 182mA Maximum S Current Limit During Normal Operation Between 1700mA and 2100mA S Current Limit and Foldback S Legacy UVLO at 36V S LED Driver with Programmable LED Current (MAX5982A/MAX5982B) S Overtemperature Protection S Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN Applications IEEE 802.3af/at Powered Devices IP Phones, Wireless Access Nodes, IP Security Cameras WiMAXK Base Stations 19-5960; Rev 0; 6/11 WiMAX is a trademark of WiMAX Forum. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. Ordering Information appears at end of data sheet. |
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