LTC4263IDE#TRPBF Linear Technology, LTC4263IDE#TRPBF Datasheet
LTC4263IDE#TRPBF
Specifications of LTC4263IDE#TRPBF
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LTC4263IDE#TRPBF Summary of contents
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... Low-Port Count PSEs n Environment B PSEs n Standalone PSEs L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. Hot Swap and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION + ...
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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC4263CDE#PBF LTC4263CDE#TRPBF LTC4263IDE#PBF LTC4263IDE#TRPBF LTC4263CS#PBF LTC4263CS#TRPBF LTC4263IS#PBF LTC4263IS#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T relative to V unless otherwise noted. (Notes SYMBOL PARAMETER V OVLO Turn-Off Voltage OVLO_OFF V OVLO Hysteresis OVLO_HYS V V Supply Voltage DD5 DD5 V Internal Supply ...
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LTC4263 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T relative to V unless otherwise noted. (Notes SYMBOL PARAMETER A Voltage Gain OSC to ACOUT VACD I AC Disconnect Output Current ACDMAX I Remain Connected AC ...
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TYPICAL PERFORMANCE CHARACTERISTICS Powering an IEEE 802.3af PD V DD48 POWER ON DETECTION DETECTION V PHASE 1 PHASE 2 OUT 10V/DIV CLASSIFICATION V SS 4263 G01 100ms/DIV Overload Restart Delay V DD48 OUT 10V/DIV ...
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LTC4263 TYPICAL PERFORMANCE CHARACTERISTICS Current Limit and Foldback 450 400 350 300 250 200 150 100 – V DD48 OUT 4263 G03 I DC Supply Current vs ...
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TEST TIMING Detect, Class and Turn-On Timing PD INSERTED V DD48 t DET V OUT V CLASS t t DETDLY DC Disconnect Timing I I OUT MIN V DD48 V OUT MPS PORT TURN-ON t PDC PON ...
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LTC4263 PIN FUNCTIONS (DFN/SO) 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 ...
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BLOCK DIAGRAM 14 V DD5 R LED + 1 LED 48V – TO OTHER LTC4263s 4 PWRMGT + 5V – 0.1μF 7 OSC BOLD LINES INDICATE HIGH CURRENT V DD48 11 5V ...
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LTC4263 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 LTC4263 OPERATION Signature Detection The IEEE 802.3af specifi cation defi nes a specifi c pair-to- pair signature resistance used to identify a device that can accept power via its Ethernet connection. When the port voltage is below 10V, ...
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LTC4263 APPLICATIONS INFORMATION Classifi cation An IEEE 802.3af PD has the option of presenting a classifi cation signature to the PSE to indicate how much power it will draw when operating. This signature consists of a specifi c constant-current draw ...
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APPLICATIONS INFORMATION Power Management The LTC4263 includes a power management feature allowing simple implementation of power management across multiple ports driven by a single power supply. The PWRMGT pins of all LTC4263 devices are tied together along with an RC ...
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LTC4263 APPLICATIONS INFORMATION Power Control The primary function of the LTC4263 is to control the delivery of power to the PSE port. In order to meet IEEE 802.3af requirements and provide a robust solution, a variety of current limit and ...
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APPLICATIONS INFORMATION condition is removed before the t OVLD port stays powered and the timer is reset. Foldback Foldback is designed to limit power dissipation in the LTC4263 during power-up and momentary short-circuit conditions. At low port output voltages, the ...
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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 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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... LTC4263 in a PSE does not in itself guarantee IEEE 802.3af compliance. To ensure a compliant PSE design recommended to adhere closely to the example ap- 4263 F09 plication circuits provided. For further assistance contact the Linear Technology Applications department. LED FLASH CODE Off Off On 1 Flash ...
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LTC4263 APPLICATIONS INFORMATION 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. For cost reduction reasons, some designs share a common mode ...
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APPLICATIONS INFORMATION Fuse While the LTC4263 does not require a fuse for proper operation or for compliance with IEEE 802.3af, some safety requirements state that the output current must be limited to less than 2A in less than 60 seconds ...
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LTC4263 TYPICAL APPLICATIONS Three Port Midspan PSE with Power Management Set for 30W ISOLATED 48V 0.1μF 0.1μF 0.1μF 20 0.1μF 100V LTC4263 DD5 DD48 LED 2 4 LEGACY PWRMGT 3 7 MIDSPAN ...
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PACKAGE DESCRIPTION 3.60 ±0.05 2.20 ±0.05 1.70 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE ...
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LTC4263 PACKAGE DESCRIPTION .050 BSC N .245 MIN .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) .016 – .050 (0.406 – 1.270) NOTE: INCHES ...
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... Replaced Figure 3 in Applications Information section 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. ...
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... Dual Current Limit DC Disconnect Only With AC Disconnect Integrated Current Mode Switching Regulator www.linear.com ● – 1 – 22nF 22nF 22nF 22nF 8 2kV 1000pF 75Ω 75Ω 75Ω 75Ω 4263 TA03 JKO-0044 PULSE 4263fe LT 0610 REV E • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2006 ...