KTA1140 EEE 802.3bt-Compliant, Powered Device Interface Controller
●The KTA1140 is a single-chip, highly integrated CMOS solution for Power over Ethernet (PoE) Powered Devices requiring input power of up to class 8 and 90Watts. Applications include Voice over IP (VoIP) Phones, Wireless LAN Access Point, Security Cameras, WiMAX Terminals, Point-of-Sales Terminals, RFID Readers, Thin Clients and Notebook computers.
●The KTA1140 implements all of the physical layer Powered Device (PD) functionality, as required by IEEE® 802.3af-2003, IEEE® 802.3at-2009 and IEEE® 802.3bt- 2018 standards. This includes 5-event classification, Type 1-2 or 3-4 PSE detection indicators (PST1/2 and PSDBT), PD detection, under-voltage lockout (UVLO), and Hot-Swap FET integration.
●The KTA1140 has been architected to address EM emission concerns in PoE applications. The chip implements many design features that minimize transmission of system common-mode noise onto the Unshielded Twisted Pair (UTP).
●The device is designed to provide safe, low-impedance discharge paths directly to the earth ground, resulting in superior reliability and circuit protection.
■Features:
●Fully supports IEEE® Std. 802.3bt
●Supports Input Power Levels Up to 90W
●Compatible with both IEEE® Std. 802.3af/at
●Support Class 0-8 for PD
●Robust Type 1, 2, 3 and 4 PSE detector with proprietary digital filtering line noise
●Auto-adjust Maintain Power Signature (MPS) for type 1-4 PSE
●Supports up to 5 Event Classification
●Programmable DC current limit up to 2.3A for 90W applications
●IEC 61000-4-2/3/4/5/6 requirements for EMC Compliance
●Exceptional EMI performance
●Low Rds-on 100 V Hot-Swap FET (typical 0.1Ω)
●Integrated Short-Circuit Protection
●Over temperature protection
●Seamless support for local power down to 9.5V
●Supports Low Power Standby Modes
●5x5 mm, 20 lead WQFN Package
●-40℃ to +125℃ Junction Temperature Range
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[ security cameras ][ web cameras ][ Voice over IP phones ][ VoIP phones ][ Lighting ][ High Power Wireless Data Systems ][ Wireless LAN access points ][ WiMAX terminals ][ Point-of-sale terminals ][ PoS terminals ][ RFID terminals ][ Thin clients ][ notebook ][ computers ][ Fiber-to-the-home terminals ][ FTTH terminals ][ Power over Ethernet Powered Devices ][ PoE Powered Devices ][ RFID Readers ][ Notebook computers ] |
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Datasheet |
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Please see the document for details |
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WQFN;WQFN55-20;WQFN-55-20 |
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English Chinese Chinese and English Japanese |
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December 2023 |
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Revision 04a |
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2.5 MB |
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