LT1640AHIS8

更新时间： 2024-01-03 21:02:09

品牌	Logo	应用领域
凌特 - Linear		光电二极管控制器
页数	文件大小	规格书
16页	317K
描述
Negative Voltage Hot Swap Controller

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数据手册

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LT1640AHIS8 数据手册

LT1640AL/LT1640AH

Negative Voltage

Hot Swap Controller

FEATURES

DESCRIPTIO

The LT^®1640AL/LT1640AH are 8-pin, negative voltage

Hot Swap^TMcontrollers that allow a board to be safely

inserted and removed from a live backplane. Inrush cur-

rent is limited to a programmable value by controlling the

gate voltage of an external N-channel pass transistor. The

pass transistor is turned off if the input voltage is less than

the programmable undervoltage threshold or greater than

the overvoltage threshold. A programmable electronic

circuit breaker protects the system against shorts. The

PWRGD (LT1640AL) or PWRGD (LT1640AH) signal can

be used to directly enable a power module. The LT1640AL

is designed for modules with a low enable input and the

LT1640AH for modules with a high enable input.

■

Allows Safe Board Insertion and Removal

from a Live –48V Backplane

■

Operates from –10V to –80V

■

Programmable Inrush Current

■

Allows 50mA of Reverse Drain Pin Current

■

Programmable Electronic Circuit Breaker

■

Programmable Overvoltage Protection

■

Programmable Undervoltage Lockout

■

Power Good Control Output

APPLICATIO S

■

Central Office Switching

■

–48V Distributed Power Systems

The LT1640AL/LT1640AH are available in 8-pin PDIP and

SO packages.

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

Hot Swap is a trademark of Linear Technology Corporation.

■

Negative Power Supply Control

TYPICAL APPLICATIO

(SHORT PIN)

GND

Input Inrush Current

GND

R4^†

562k

CONTACT

BOUNCE

UV = 37V

OV = 71V

R5^†

9.09k

LT1640AL

PWRGD

R6^†

10k

SENSE

GATE

DRAIN

C1^†

150nF

25V

R3^†

18k

10Ω

C2^†

3.3nF

100V

R1^†

0.02Ω

–48V

IRF530

ON/OFF

–

OUT

SENSE

* DIODES INC. SMAT70A

^†THESE COMPONENTS ARE APPLICATION

SPECIFIC AND MUST BE SELECTED BASED

0.1µF

100µF

TRIM

–

100µF

16V

100V

UPON OPERATING CONDITIONS AND DESIRED

PERFORMANCE. SEE APPLICATIONS

INFORMATION.

SENSE

–

OUT

1640A F07b

1640A TA01

LUCENT

JW050A1-E

12 3 4 5 6 7...16

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