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TMI7327A

Fully-Integrated 802.3af-Compatible PoE PD Interface with 13W Primary-side Regulated Flyback or Buck Converter

产品详细信息

特性
说明

·Compatible with 802.3af Specifications 

·Support 13W PoE Power Application 

·100V, 0.48Ω Integrated Pass Switch  

·Inrush Current Limit of 120mA Maximum 

·Current Limit During Normal Operation  Between 400mA and 600mA 

·Current Limit and Foldback 

·Simplified Wall Adapter Interface 

·Integrated 160V Switching Power MOSFET 

·Supports Primary-Side Regulated Flyback without Opto-Coupler Feedback 

·Supports Low-side Switch Buck Converter 

·Up to 3A Programmable Switching Current  Limit 

·OLP, OVP, OTP and Open-Circuit Protection

·Minimal External Components 

·QFN 4mmx5mm-28 Package

The TMI7327A is an integrated IEEE 802.3af  compatible PoE Powered Device with PD interface  and power converter. It is targeted for isolated or  non-isolated 13W PoE application. The PD provide 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 PD with a detection signature, classification  signature, and an integrated isolation power switch  with inrush current control. During the inrush period,  the PD limit the current to less than 120mA before  switching to the higher current limit (400mA to  600mA) 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 poweron/-off conditions. The PD can withstand up to  100V at the input. 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. TMI7327A features protection including over  current protection, over voltage protection, open  circuit protection and thermal shut down. The  TMI7327A can support a front-end solution for  PoE-PD application with minimum external component, it is available in QFN-28 (4mmX5mm)  package.

TMI7327A
太阳成城集团
TMI7327A

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