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LTC4265 Datasheet(PDF) 20 Page - Linear Technology |
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LTC4265 Datasheet(HTML) 20 Page - Linear Technology |
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20 / 20 page  LTC4265 20 4265f Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2008 LT 1208 • PRINTED IN USA RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1952 LT1952-1 Single Switch Synchronous Forward Controller Adjustable Switching Frequency, Programmable Undervoltage Lockout, Optional Burst Mode ® Operation at Light Load LTC3805 Adjustable Frequency Current Mode Flyback Controller Slope Comp Overcurrent Protect, Internal/External Clock LTC3825 Isolate No-Opto Synchronous Flyback Controller with Wide Input Supply Range Adjustable Switching Frequency, Programmable Undervoltage Lockout, Accurate Regulation without Trim, Synchronous for High Efficiency. LTC4257-1 IEEE 802.3af PD Interface Controller 100V 400mA Internal Switch, Programmable Classification Current Limit LTC4258 Quad IEEE 802.3af Power over Ethernet Controller DC Disconnect Only, IEEE-Compliant PD Detection and Classification, Autonomous Operation or I2C Control LTC4259A-1 Quad IEEE 802.3af Power over Ethernet PSE Controller with AC Disconnect AC or DC Disconnect IEEE-Compliant PD Detection and Classification, Autonomous Operation or I2C Control LTC4263/LTC4263-1 Single IEEE 802.3af Power over Ethernet Controller Internal Switch, Autonomous Operation or I2C Control. 15.4W or 30W. LTC4264 High Power PD Interface Controller with 750mA Current Limit 750mA Internal Switch, Programmable Classification Current Limit with disable, Complementary Power Good LTC4267 LTC4267-1 LTC4267-3 IEEE 802.3af PD Interface with Integrated Switching Regulator 100V 400mA Internal Switch, Programmable Classification, 200KHz or 300KHz Constant Frequency PWM, Interface and Switcher Optimized for IEEE-Compliant PD System. LTC4268-1 High Power PD with Synchronous No Opto Flyback Controller 750mA Internal Switch, Programmable Class, Current Limit, Synchronous Programmable Switching Frequency and UVLO, High Efficiency ThinSOT is a trademark of Linear Technology Corporation. • • FDS2582 10.0k 33k 10μF 16V 237k 30.9Ω 82k 158k 332k 22.1k 1.2k 4.7nF 100pF 10μF 100V 0.1μF 100V SMAJ58A B1100 8 PLCS 2.2μF 100V PA2431NL 4265 TA03a PGND GND SD_VSEC OC ISENSE COMP FB VREF SS_MAXDC OUT BLANK DELAY ROSC LT1952 VIN VCC SOUT GND RCLASS SHDN LTC4265 T2PSE VIN VOUT 10μH –54V FROM DATA PAIR –54V FROM SPARE PAIR • 5V 5A 220μF 6.3V PSLVOJ227M(12) FDS8880 FDS8880 + GND GND 5V 2.2nF 2kV BAS516 BAS516 10k 133Ω 0.1μF 1mH DO1608C-105 IRF6217 4.7nF 250V 50mΩ 5.1Ω 158k 0.22μF 5.1Ω 1nF 5.1Ω 1nF 6.8μH PG0702.682 + 2k PS2801-1-L PS22801-1-L BC857BF TLV431A 1.5k 33k 22k 0.1μF 10nF 11.3k 3.65k 51k 20k T2P (TO MICROCONTROLLER) BAS516 BAS516 18V PDZ18B VCC PoE-Based Self-Driven Synchronous Forward Power Supply TYPICAL APPLICATION LOAD (A) 0.5 80 85 90 5 4265 TA03b 75 65 70 1.5 2 1 3 2.5 4 4.5 3.5 95 42V 50V 57V Efficiency vs Load Current |
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