LTC4274

28

4274fa

RELATED PARTS

©LINEAR TECHNOLOGY CORPORATION 2009

LT 0411 REV A • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

Autonomous Midspan PSE

TYPICAL APPLICATION

4274 TA02

SCL

SDAIN

SDAOUT

AD0

AD1

AD2

AD3

AGND

IRFM120A

–54V

1μF

100V

SMAJ58A

GATE

OUT

PORT

0.22μF

100V

S1B

10k

DGND

RESET

SHDN

MID

MSD

AUTO

INT

10k

0.1μF

3.3V

LTC4274

–54V

PART NUMBER

DESCRIPTION

COMMENTS

LT1619

Low Voltage Current Mode PWM Controller

–48V to 3.3V at 300mA, MSOP Package

LTC4257

IEEE 802.3af PD Interface Controller

100V, 400mA Internal Switch, Programmable Class

LTC4257-1

IEEE 802.3af PD Interface Controller

100V, 400mA Internal Switch, Dual Current Limit, Programmable Class

LTC4258

Quad IEEE 802.3af PoE PSE Controller

DC Disconnect Sensing Only

LTC4259A-1

Quad IEEE 802.3af PoE PSE Controller

With Both AC and DC Disconnect Sensing

LTC4263

Single IEEE 802.3af PSE Controller

Internal FET Switch, Autonomous Operation

LTC4263-1

High Power Single PoE PSE Controller

Internal FET Switch, Autonomous Operation

LTC4264

High Power PD Controller

Internal FET Switch With 750mA Current Limit

LTC4265

IEEE 802.3at PD Interface Controller

100V, 1A Internal Switch, 2-Event Classification Recognition

LTC4266

IEEE 802.3at Quad PSE Controller

Supports IEEE 802.3at Type 1 and 2 PDs, 0.34Ω Channel Resistance, Advanced Power

Management, High-Reliability 4-Point PD Detection, Legacy Capacitance Detect

LTC4267

IEEE 802.3af PD Interface Console with

Integrated Switching Regulator

Internal 100V, 400mA Switch, Dual Inrush Current, Programmable Class

LTC4267-1

IEEE 802.3af PD Interface with Integrated

Switching Regulator

100V, 400mA Internal Switch, Programmable Class, 200kHz Constant Frequency PWM

LTC4267-3

IEEE 802.3af PD Interface with Integrated

Switching Regulator

100V, 400mA Internal Switch, Programmable Class, 300kHz Constant Frequency PWM

LTC4268-1

High Power PD with Synchronous Flyback

Controller

No Optocoupler Required

LTC4269-1

IEEE 802.3at PD Interface Console with

Integrated Switching Regulator

2-Event Classification, Programmable Classification, Synchronous No-Opto Flyback

Controller, 50kHz to 250kHz, Auxiliary Support

LTC4269-2

IEEE 802.3at PD Interface Console with

Integrated Switching Regulator

2-Event Classification, Programmable Classification, Synchronous Forward Controller,

100kHz to 500kHz, Auxiliary Support

LTC4278

IEEE 802.3at PD Interface with Integrated

Switching Regulator

2-Event Classification, Programmable Classification, Synchronous No-Opto Flyback

Controller, 50kHz to 250kHz, 12V Auxiliary Support

LTC4311