Datasheet > LTC1921

LTC1921

更新时间： 2024-01-03 08:47:00

品牌	Logo	应用领域
凌特 - Linear		监视器
页数	文件大小	规格书
12页	181K
描述
Dual .48V Supply and Fuse Monitor

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中文翻译

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数据手册

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LTC1921 数据手册

Final Electrical Specifications

LTC1921

Dual –48V Supply

and Fuse Monitor

May 2002

FEATURES

DESCRIPTIO

The LTC^®1921 monitors two independent –48V supplies,

including their fuses, and drives up to three optoisolators

to indicate status, in accordance with standard backplane

specifications. Requiring only three noncritical resistors

and optoisolators, the LTC1921 replaces multiple voltage

comparators, a voltage reference and several precision

resistors.

■

Independently Monitors Two –48V Supplies for

– Undervoltage Faults: –38.5V ±1V_MAX

– Overvoltage Faults: –70V ±1.5V_MAX

■

Accurately Detects Undervoltage Fault Recovery:

–43V ±0.5V_MAX

■

Monitors Two External Fuses

■

Operates from –10V to –80V

■

Tolerates DC Faults to –100V

The monitor features dual supply overvoltage and under-

voltage detection circuits. The preset trip thresholds in-

cludeovervoltage,undervoltageandundervoltagerecovery

that are guaranteed over temperature and meet or exceed

common backplane specifications. Additional built-in cir-

cuitry detects the condition of supply fuses. Overvoltage

and undervoltage detectors ignore fast supply transients,

eliminating false detection. The LTC1921 operates from

–10V to –80V with a typical power dissipation of less than

10mW.

■

Tolerates Accidental Supply Reversal to 100V

■

Withstands Transient Voltages Up to 200V/–200V

■

Small Footprint: 8-Lead MSOP Package

■

Requires No Precision External Components

■

Specified from –40°C to 85°C

APPLICATIO S

■

Telecom Backplanes or Switch Cards

■

Networking Backplanes or Switch Cards

■

High Voltage Fuse Monitoring

The LTC1921 is available in an 8-pin MSOP package.

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

TYPICAL APPLICATIO

–48V

RETURN

47k

47k 47k

LOGIC

SUPPLY

100k

FUSE GOOD

–48V LOAD

MOC207

RTN

OUT F

SUPPLY A GOOD

SUPPLY B GOOD

SUPERVISOR

µP

LTC1921

FUSE A

FUSE B

LOGIC

COMMON

OUT A

MOC207

OUT B

47k

1/4W

D1 MURS320

D2 MURS320

SUPPLY A

–48V

1921 TA01

SUPPLY B

–48V

1921i

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will notinfringe onexisting patent rights.

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与LTC1921相关器件

型号	品牌	获取价格	描述	数据表
LTC1921_1	Linear	获取价格	Dual -48V Supply and Fuse Monitor
LTC1921CMS8	Linear	获取价格	Dual .48V Supply and Fuse Monitor
LTC1921CMS8#PBF	Linear	获取价格	LTC1921 - Dual -48V Supply and Fuse Monitor; Package: MSOP; Pins: 8; Temperature Range: 0&
LTC1921CMS8#TR	Linear	获取价格	LTC1921 - Dual -48V Supply and Fuse Monitor; Package: MSOP; Pins: 8; Temperature Range: 0&
LTC1921CMS8#TRPBF	Linear	获取价格	LTC1921 - Dual -48V Supply and Fuse Monitor; Package: MSOP; Pins: 8; Temperature Range: 0&
LTC1921CS8	Linear	获取价格	Dual -48V Supply and Fuse Monitor
LTC1921CS8#PBF	Linear	获取价格	LTC1921 - Dual -48V Supply and Fuse Monitor; Package: SO; Pins: 8; Temperature Range: 0&am
LTC1921CS8#TR	Linear	获取价格	暂无描述
LTC1921CS8#TRPBF	Linear	获取价格	LTC1921 - Dual -48V Supply and Fuse Monitor; Package: SO; Pins: 8; Temperature Range: 0&am
LTC1921IMS8	Linear	获取价格	Dual .48V Supply and Fuse Monitor

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