Datasheet > LTC4269CDKD-1-PBF

LTC4269CDKD-1-PBF

更新时间： 2024-11-05 05:43:59

品牌	Logo	应用领域
凌特 - Linear		光电光电二极管控制器
页数	文件大小	规格书
44页	385K
描述
IEEE 802.3at PD with Synchronous No-Opto Flyback Controller

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LTC4269-1

IEEE 802.3at PD with

Synchronous No-Opto

Flyback Controller

FEATURES

DESCRIPTION

The LTC^®4269-1 is an integrated Powered Device (PD)

controller and switching regulator intended for high

power IEEE 802.3at and 802.3af applications. The

LTC4269-1 is targeted for high efﬁciency, single and

multioutput applications from 10W to 25W. By support-

ing both 1-event and 2-event classiﬁcations, as deﬁned

by the IEEE, the LTC4269-1 can be used in a wide range

of product conﬁgurations.

25.5W IEEE 802.3at Compliant (Type 2) PD

Integrated State-of-the-Art Synchronous Flyback

Controller

– Isolated Power Supply Efﬁciency >92%

– 88% Efﬁciency Including Diode Bridge and

Hot Swap™ FET

Flexible Integrated Auxiliary Power Support

Superior EMI Performance

Robust 100V 0.7Ω (Typ) Integrated Hot Swap MOSFET

The LTC4269-1 synchronous, current mode, ﬂyback con-

trollergeneratesmultiplesupplyrailsinasingleconversion

stepprovidingforthehighestsystemefﬁciencywhilemain-

taining tight regulation across all outputs. The LTC4269-1

includes Linear Technology’s patented No-Opto feedback

topology to provide full IEEE 802.3 isolation without the

need of an opto-isolator circuit. A true soft-start function

allows graceful ramp-up of all output voltages.

IEEE 802.3at High Power Available Indicator

Integrated Signature Resistor and Programmable

Class Current

Undervoltage, Overvoltage and Thermal Protection

Short-Circuit Protection with Auto-Restart

Programmable Soft-Start and Switching Frequency

Complementary Power Good Indicators

Thermally Enhanced 7mm × 4mm DFN Package

All Linear Technology PD solutions include a shutdown

pin to provide ﬂexible auxiliary power options. The

LTC4269-1 can accommodate adaptor voltages from 18V

to 60V and supports both PoE or aux dominance options.

The LTC4269-1 is available in a space saving 32-pin DFN

package.

APPLICATIONS

VoIP Phones with Advanced Display Options

Dual-Radio Wireless Access Points

PTZ Security Cameras

RFID Readers

Industrial Controls

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners. Protected by U.S. Patents, including

5841643.

TYPICAL APPLICATION

25W High Efﬁciency PD Solution

•

0.18μH

47μF

10μH

39k

100μF

•

2.2μF

10μF

383k

14k

27.4k

10μF

~ +

~ –

54V FROM

DATA PAIR

TO MICRO

CONTROLLER

3.01k

–

PG SENSE

PWRGD UVLO

T2P

~ +

~ –

54V FROM

SPARE PAIR

PORTP

33mΩ

10nF

CLASS

SENSE

30.9ꢀ

LTC4269-1

0.1μF

SHDN

PORTN

CMP

2.2nF

1μF

SYNC GND OSC PGDLY

ENDLY

100k

CMP

NEG

CMP

•

12k

38.3k 1.21k

33pF

0.1μF

42691 TA01a

42691fb

12 3 4 5 6 7...44

中文翻译

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与LTC4269CDKD-1-PBF相关器件

型号	品牌	获取价格	描述	数据表
LTC4269CDKD-1-TRPBF	Linear	获取价格	IEEE 802.3at PD with Synchronous No-Opto Flyback Controller
LTC4269CDKD-2	Linear	获取价格	IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
LTC4269CDKD-2#PBF	Linear	获取价格	LTC4269-2 - IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
LTC4269CDKD-2#TR	Linear	获取价格	IC SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO32, 7 X 4 MM, PLASTIC, M0-229, DF
LTC4269CDKD-2#TRPBF	Linear	获取价格	LTC4269-2 - IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
LTC4269CDKD-2-PBF	Linear	获取价格	IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
LTC4269CDKD-2-TR	Linear	获取价格	IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
LTC4269CDKD-2-TRPBF	Linear	获取价格	IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
LTC4269IDKD-1-PBF	Linear	获取价格	IEEE 802.3at PD with Synchronous No-Opto Flyback Controller
LTC4269IDKD-1-TRPBF	Linear	获取价格	IEEE 802.3at PD with Synchronous No-Opto Flyback Controller

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