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TMI7327B

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 

·Intelligent Maintain Power Signature (MPS) 

·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 TMI7327B is an integrated IEEE 802.3af  compatible PoE𓆏 Powered Device with PD interface  and power converter.♔🦄 It is targeted for isolated or  non-isolated 13W PoE application. The PD provide a complete interf🐟ace 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  ൩;signature, and an integrated isolation po🧜wer switch  with inrush current control. During the inrush period, &♐nbsp;the PD limit the current to less t🐈han 120mA before  swi🦋tching to the higher current limit (400mA to  6♌00mA) when the iso🔴lation power MOSFET is fully  enhanced. The devices 𓃲feature an input UVLO with  wide hysteresis and long deglitch time to  compensat🐭e for twisted-pair cable resistive drop  and to assure glitch-free transition during powౠeron/-off conditions. The PD can ꦯwithstand up to  100V at the 🤪input. The devices detect the presence  of a wall a💜dapter power-source connection and ♒ allow a smooth switchover from the P꧙oE power  source to the wall power adapter. The intelligent &nb🎃sp;MPS function en♕ables applications requiring very💮  low power standby modes. TMIꦇ7327B features protection including over  current🎶 🌜protection, over voltage protection, open  circuit prot𝓀ectio🃏n and thermal shut down. The  TMI7327B can support a froඣnt-end solution for &nb𒁃sp;PoE-PD application with minimum external component, it is ♋available in QFN-28 (4mmX5mm)  package.

TMI7327B
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TMI7327B

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