Electronic Components Datasheet Search |
|
LT1619 Datasheet(PDF) 1 Page - Linear Technology |
|
LT1619 Datasheet(HTML) 1 Page - Linear Technology |
1 / 28 page LTC4274 1 4274fa n PSE Switches/Routers n PSE Midspans APPLICATIONS FEATURES DESCRIPTION Single PoE+ PSE Controller The LTC®4274 is a single power sourcing equipment con- troller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet systems. External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heatsinks even at Type 2 power levels. External power components also allow use at very high power levels while remaining otherwise compatible with the IEEE standard. 80V-rated port pins provide robust protection against external faults. The LTC4274 includes advanced power management features, including current and voltage readback and pro- grammable ICUT and ILIM thresholds. Available C libraries simplify software development; an optional AUTO pin mode provides fully IEEE-compliant standalone operation with no software required. Proprietary 4-point PD detection circuitry minimizes false PD detection while supporting legacy phone operation. Midspan operation is supported with built-in 2-event classification and backoff timing. Host communication is via a 1MHz I2C serial interface. The LTC4274 is available in a 5mm × 7mm QFN package that significantly reduces board space compared with competing solutions. n Compliant with IEEE 802.3at Type 1 and 2 n 0.34Ω Total Channel Resistance 130mW/Port at 600mA n Advanced Power Management 8-Bit Programmable Current Limit (ILIM) 7-Bit Programmable Overload Currents (ICUT) Fast Shutdown 14.5-Bit Port Current/Voltage Monitoring 2-Event Classification n Very High Reliability 4-Point PD Detection: 2-Point Forced Voltage 2-Point Forced Current n High Capacitance Legacy Device Detection n LTC4259A-1 and LTC4266 SW Compatible n 1MHz I2C Compatible Serial Control Interface n Midspan Backoff Timer n Supports Proprietary Power Levels Above 25W n Available in 38-Pin 5mm × 7mm QFN Package TYPICAL APPLICATION Complete Ethernet High Power Source L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. 4274 TA01 SCL SDAIN SDAOUT AD0 AD1 AD2 AD3 AGND VEE SENSE –54V 1μF 100V SMAJ58A GATE OUT PORT 0.22μF 100V S1B S1B –54V DGND VDD INT SHDN AUTO MSD RESET MID 0.1μF 3.3V LTC4274 |
Similar Part No. - LT1619 |
|
Similar Description - LT1619 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |