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TMI7326B

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 TMI7326B is an integrated IEEE 802.3af  compatible PoE Poweredꦐ Device with PD interface ꧅ and power converter. It is targe🥂ted for isolated or♚  non-isolated 13W PoE application. The PD provide a complete interfไace for a powered  device (PD) to✅ compl꧃y with the IEEE® 802.3af/at  standard in a power-over-⛎Ethernet (PoE) system.  The 𒊎PD with a detection signature, classification  signat♍ure, and an integrated isolation powe🌳r switch  with inr𓂃ush current control. During the inrush🐼 period,  the PD limit the currꦗent to less than 120mA before  switching to the higher current limit (400mA to &n💝bsp;600mA) when🌳 the isolation power MOSFET is fully  enhanced. The devic𒉰✨es feature an input UVLO with  wide hysteresis and long deglitch time to  compensate for twisted-pair cable res💯istive drop  and to assure glitch-free transition dur🌠ing power-on/-off cond🍬itions. The PD can withsta😼nd up to  100V at the i༺nput. The devices detect the presence  of a wall adapter power-so𓃲urce con♑nection and  allow a smooth switchover from the PoE 🤪power  source to the wal🦹l power adapter. The intelligent  MPS function enables applications requiring ♊very  low power standby modes. TMI7326B features protection inclꦦuding over  current protection, over v꧋olt🌳age protection, open  circuit protection and thermal shut down. T🏅he  TMI7326B can support a front-end solution ﷽for  PoE-PD application with minimum external  component, it is available in QFN-2𓆏8 (4mmX5mm)  package.

TMI7326B
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TMI7326B

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