LTC4263CDE-1#TRPBF Linear Technology, LTC4263CDE-1#TRPBF Datasheet
LTC4263CDE-1#TRPBF
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LTC4263CDE-1#TRPBF Summary of contents
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... The LTC4263-1 is available in a miniature 14-pin 4mm × 3mm DFN package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Single-Port Fully Autonomous High Power PSE 0.1μ ...
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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC4263CDE-1#PBF LTC4263CDE-1#TRPBF LTC4263IDE-1#PBF LTC4263IDE-1#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T relative to V unless otherwise noted. (Note 2, Note 5) SS SYMBOL PARAMETER Power MOSFET R On-Resistance ON I OUT Pin Leakage OUT_LEAK R OUT Pin Pull-Up Resistance to V ...
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LTC4263-1 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T relative to V unless otherwise noted. (Note 2, Note 5) SS SYMBOL PARAMETER Timing Characteristics t Detection Time DET t Detection Delay DETDLY t Power Turn-On Delay PON t ...
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TYPICAL PERFORMANCE CHARACTERISTICS Powering an IEEE 802.3af PD V DD48 POWER ON DETECTION DETECTION PHASE 1 PHASE 2 V OUT 10V/DIV V SS 42631 G01 100ms/DIV Midspan Backoff with Invalid PD V DD48 t DBO V OUT 2V/DIV R = ...
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LTC4263-1 TYPICAL PERFORMANCE CHARACTERISTICS Current Limit and Foldback 675 600 525 450 375 300 225 150 – V (V) DD48 OUT 42631 G03 I DC Supply Current ...
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TEST TIMING Detect and Turn-On Timing PD INSERTED V DD48 t DET V OUT t t DETDLY PON DC Disconnect Timing I I OUT MIN V DD48 V OUT MPS PORT TURN-ON 42631 TT01 t MPDO 42631 ...
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LTC4263-1 PIN FUNCTIONS LED (Pin 1): Port State LED Drive. This pin is an open- drain output that pulls down when the port is powered. Under port fault conditions, the LED will fl ash in patterns to indicate the nature ...
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... BLOCK DIAGRAM 14 V DD5 R LED + 1 LED 56V – – 0.1μF 7 OSC BOLD LINES INDICATE HIGH CURRENT Hot Swap IS A TRADEMARK OF LINEAR TECHNOLOGY CORPORATION V DD48 11 5V REG INT5 EXT5 V DD5 3 500k CONTROL I DET Hot Swap TM LTC4263 0.1μF 2 LEGACY 3 MIDSPAN TO PORT ...
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LTC4263-1 APPLICATIONS INFORMATION POE OVERVIEW Over the years, twisted-pair Ethernet has become the most commonly used method for local area networking. The IEEE 802.3 group, the originator of the Ethernet standard, has defi ned an extension to the standard, IEEE ...
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APPLICATIONS INFORMATION accidentally powered. Disconnect with either methods using the LTC4263-1 is fully compliant and insures safe power removal after PD disconnect. Com- mand and control for the LTC4263-1 is handled internally without the need of a ...
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LTC4263-1 APPLICATIONS INFORMATION Power Control The primary function of the LTC4263 control the delivery of power to the PSE port. In order to provide a robust solution, a variety of current limit and current monitoring functions are needed, ...
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APPLICATIONS INFORMATION 750 600 450 300 150 – V (V) DD48 OUT Figure 5. Current Limit Foldback Thermal Protection The LTC4263-1 includes thermal overload protection in order to provide full ...
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... Power over Ethernet AC disconnect system (PSE, transformers, cabling, PD, etc.) is complex; deviating from the recommended values DET DET discouraged. Contact the Linear Technology Applications department for additional support. Internal 110Hz AC Oscillator The LTC4263-1 includes onboard circuitry to generate a 110Hz (typ), 2V sine wave on its OSC pin when a P-P 0.1μ ...
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APPLICATIONS INFORMATION Table 1. Port Status and LED Flash Codes PORT STATUS Non-Powered Device 0Ω < R < 200Ω PORT Port Open R > 1MΩ PORT Port On 25kΩ Low Signature Resistance 300Ω < R < 15kΩ PORT High Signature ...
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... CABLE two independent DC/DC converters in the PD. Using a 2-pair architecture with the LTC4263-1 allows delivery of 25W to the PD while using a 4-pair architecture allows delivery of 50W. Contact Linear Technology applications support for detailed information on implementing 2-pair and 4-pair PoE systems. Common Mode Chokes Both non-powered and powered Ethernet connections achieve best performance for data transfer and EMI when a common mode choke is used on each port ...
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APPLICATIONS INFORMATION PSE + 0.1μF 0.1μF V DD48 Tx 56V LTC4263-1 V DD5 Rx 0.1μF SMAJ58A 58V – V OUT SS + 0.1μF 0.1μF V DD48 Tx 56V LTC4263-1 V DD5 Rx 0.1μF SMAJ58A 58V – V OUT SS Figure ...
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LTC4263-1 APPLICATIONS INFORMATION If the port voltage reverses polarity and goes positive, the OUT pin can be overstressed because this voltage is stacked on top of the 56V supply. In this case, the transient suppresser is used to clamp the ...
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... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. DE Package 14-Lead Plastic DFN (4mm × ...
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... Quad IEEE 802.3af Power Over Ethernet Controller LTC4263 Single IEEE 802.3af Compliant PSE Controller LTC4264 High Power PD Interface Controller LTC4267 IEEE 802.3af PD Interface with Switcher ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...