ltc4263cde-trpbf Linear Technology Corporation, ltc4263cde-trpbf Datasheet
ltc4263cde-trpbf
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ltc4263cde-trpbf Summary of contents
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... Single-Port or Multi-Port Power Injectors n Power Forwarders n Low-Port Count PSEs n Environment B PSEs n Standalone PSEs L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION + ISOLATED 48V SUPPLY – Compliant PSE Controller DESCRIPTION ® ...
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... EXPOSED PAD (PIN 15 MUST BE SOLDERED TO PCB SS 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. ...
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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 clas- sifi cation signature to the PSE to indicate how much power it will draw when operating. This signature consists of a specifi c constant-current ...
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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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LTC4263 APPLICATIONS INFORMATION + ISOLATED 48V SUPPLY – being shorted by the LTC4263’s power control MOSFET. The 500k resistor across D allows the port voltage to AC decay after disconnect occurs. Sizing of capacitors is critical to ensure proper function ...
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APPLICATIONS INFORMATION When active, the LED fl ash codes are repeated every 1.2 seconds. The duration of each LED fl ash is 75ms. Multiple LED fl ashes occur at a 300ms interval. The LTC4263 includes a feature for effi ciently ...
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... The SMAJ58A is rated at less than 5μA leakage at 58V and works well in this applica- tion. There is a potential for stress induced leakage, so suffi cient margins should be used when selecting transient suppressors for these applications. Hot Swap is a trademark of Linear Technology Corporation. 4263fc ...
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APPLICATIONS INFORMATION Capacitors Sizing of both the C and C capacitors is critical for DET PSE proper operation of the LTC4263 AC disconnect sensing. See the AC Disconnect section for more information. Note that many ceramic capacitors have dramatic DC ...
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LTC4263 APPLICATIONS INFORMATION Isolation The IEEE 802.3af standard requires Ethernet ports to be electrically isolated from all other conductors that are user accessible. This includes the metal chassis, other connec- tors, and the AC power line. Environment A isolation is ...
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TYPICAL APPLICATIONS Three Port Midspan PSE with Power Management Set for 30W ISOLATED 48V 0.1μF 0.1μF 0.1μF 0.1μF 100V LTC4263 DD5 DD48 LED 2 4 LEGACY PWRMGT 3 7 MIDSPAN OSC 13 ...
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LTC4263 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 ...
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... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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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... LTC4258 Quad IEEE 802.3af Power Over Ethernet Controller LTC4259A-1 Quad IEEE 802.3af Power Over Ethernet Controller LTC4267 IEEE 802.3af PD Interface with Switcher ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...