LTC4255

更新时间： 2024-11-27 23:16:47

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
16页	209K
描述
Quad Network Power Controller with I2C Compatible Interface

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LTC4255 数据手册

LTC4255

Quad Network Power

Controller with I C Compatible Interface

FEATURES

DESCRIPTIO

The LTC^®4255 is a quad –48V network power controller

with independent relay drivers and I²C compatible inter-

face. Each channel can be turned on and off via software

control, while providing short-circuit protection, open-

circuit detection, and power good indication. The short-

circuit protection includes a current foldback feature to

reduce power dissipation in the switch during shorts and

start-up.

■

Controls Four Independent –48V Power Channels

Each Channel has Separate Relay Drivers, ON/OFF

Control, Short-Circuit Protection with Current

Foldback, Open-Circuit Detection, and Power Good

Indication

■

Programmed via I²C^TMCompatible Interface

Five Bit Programmable Digital Address Allows

Control of up to 32 LTC4255s (128 Channels)

Interrupt on FAULT Output can be used to Eliminate

Software Polling

■

The serial interface allows up to 128 channels to be

controlled with only two digital lines. A FAULT output can

be used as an interrupt line to eliminate fault detection by

software polling.

Programmable Current Limit and Open-Circuit

Duration Periods

Programmable Latchoff or Autoretry after Short-

Circuit Faults

Programmable Autoretry Duty Cycle

External switches and current sense resistors allow easy

scaling of current and power dissipation levels and pro-

vide the maximum protection against voltage and current

spikes.

APPLICATIO S

The LTC4255 is available in the 28-pin SSOP package.

■

IP Phone Systems

DTE Power Distribution

, LTC and LT are registered trademarks of Linear Technology Corporation.

I²C is a trademark of Philips Electronics N.V.

■

TYPICAL APPLICATIO

12V

0.1µF

SCL

SDA

FAULT

AD0

AD1

AD2

AD3

AD4

RELAY1

RELAY2

LTC4255

RELAY3

RELAY4

DGND AGND

SENSE1 GATE1 OUT1 SENSE2 GATE2 OUT2 SENSE3 GATE3 OUT3 SENSE4 GATE4 OUT4

100k

0.33Ω

0.1µF

–48V

0.33Ω

Q1, Q2, Q3, Q4: FDC3612

RELAYS: V23079 SERIES

4255 TA01

4255f

12 3 4 5 6 7...16

中文翻译

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与LTC4255相关器件

型号	品牌	获取价格	描述	数据表
LTC4255CG	Linear	获取价格	Quad Network Power Controller with I2C Compatible Interface
LTC4255CG#PBF	Linear	获取价格	LTC4255 - Quad Network Power Controller with I<sup>2</sup>C Compatible Interfa
LTC4255CG#TR	Linear	获取价格	LTC4255 - Quad Network Power Controller with I<sup>2</sup>C Compatible Interfa
LTC4255CG#TRPBF	Linear	获取价格	LTC4255 - Quad Network Power Controller with I<sup>2</sup>C Compatible Interfa
LTC4257	Linear	获取价格	Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator
LTC4257	ADI	获取价格	IEEE 802.3af PD 以太网供电接口控制器
LTC4257-1	Linear	获取价格	Power over Ethernet Interface Controller with Dual Current Limit
LTC4257-1	ADI	获取价格	具有双电流限值的IEEE 802.3af PD 以太网供电接口控制器
LTC4257CDD	Linear	获取价格	IEEE 802.3af PD Power over Ethernet Interface Controller
LTC4257CDD#PBF	Linear	获取价格	LTC4257 - IEEE 802.3af PD Power over Ethernet Interface Controller; Package: DFN; Pins: 8;

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