Datasheet > LT4256-1

LT4256-1

更新时间： 2024-11-11 03:52:11

品牌	Logo	应用领域
凌特 - Linear		控制器
页数	文件大小	规格书
16页	268K
描述
Positive High Voltage Hot Swap Controllers

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中文翻译

获取价格

数据手册

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LT4256-1 数据手册

LT4256-1/LT4256-2

Positive High Voltage

Hot Swap Controllers

DESCRIPTIO

FEATURES

The LT^®4256-1/LT4256-2 are high voltage Hot Swap^TM

controllers that allow a board to be safely inserted and

removedfromalivebackplane.Aninternaldriverdrivesan

external N-channel MOSFET switch to control supply

voltages ranging from 10.8V to 80V.

■

Allows Safe Board Insertion and Removal from a

Live Backplane

■

Controls Supply Voltage from 10.8V to 80V

■

Foldback Current Limiting

Overcurrent Fault Detection

■

Drives an External N-Channel MOSFET

The LT4256-1/LT4256-2 features an adjustable analog

foldbackcurrentlimit.Ifthesupplyremainsincurrentlimit

for more than a programmable time, the N-channel

MOSFETshutsoffandthePWRGDoutputassertslow.The

LT4256-2 automatically restarts after a time-out delay.

The LT4256-1 latches off until the UV pin is cycled low.

■

Programmable Supply Voltage Power-Up Rate

■

Undervoltage Protection

■

Latch Off Operation Mode (LT4256-1)

■

Automatic Retry (LT4256-2)

■

Available in an 8-Pin SO Package

The PWRGD output indicates when the output voltage

rises above a programmed level. An external resistor

string from V_CCprovides programmable undervoltage

protection.

APPLICATIO S

■

Hot Board Insertion

■

Electronic Circuit Breaker/Power Bussing

■

TheLT4256canbeusedasanupgradetoLT1641designs.

See Table 1 on page 14 for upgraded specifications.

Industrial High Side Switch/Circuit Breaker

■

24V/48V Industrial/Alarm Systems

■

Ideally Suited for 12V, 24V and 48V Distributed

The LT4256-1 and LT4256-2 are available in an 8-pin SO

package that is pin compatible with the LT1641.

Power Systems

■

48V Telecom Systems

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

Hot Swap is a trademark of Linear Technology Corporation.

TYPICAL APPLICATIO

48V, 2A Hot Swap Controller

LT4256 Start-Up Behavior

0.02Ω

IRF530

48V

OUT

48V

SMAT70A

(SHORT PIN)

CMPZ5241B

11V

V_IN

50V/DIV

10Ω

36.5k

4.02k

27k

SENSE

64.9k

10nF

100Ω

V_OUT

50V/DIV

GATE

LT4256-1/

LT4256-2

0.1µF

8.06k

INRUSH

CURRENT

500mA/DIV

PWRGD

50V/DIV

PWRGD

GND

4256 TA01

2.5ms/DIV

4256 TA02

UV = 36V

PWRGD = 40V

TIMER

33nF

GND

425612f

12 3 4 5 6 7...16

中文翻译

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与LT4256-1相关器件

型号	品牌	获取价格	描述	数据表
LT4256-1_15	Linear	获取价格	Positive High Voltage Hot Swap Controllers
LT4256-1CS8	Linear	获取价格	Positive High Voltage Hot Swap Controllers
LT4256-1CS8#PBF	Linear	获取价格	LT4256-1 and LT4256-2 - Positive High Voltage Hot Swap Controllers; Package: SO; Pins: 8;
LT4256-1IS8	Linear	获取价格	Positive High Voltage Hot Swap Controllers
LT4256-1IS8#TRPBF	Linear	获取价格	LT4256-1 and LT4256-2 - Positive High Voltage Hot Swap Controllers; Package: SO; Pins: 8;
LT4256-2	Linear	获取价格	Positive High Voltage Hot Swap Controllers
LT4256-2_15	Linear	获取价格	Positive High Voltage Hot Swap Controllers
LT4256-2CS8	Linear	获取价格	Positive High Voltage Hot Swap Controllers
LT4256-2CS8#PBF	Linear	获取价格	暂无描述
LT4256-2CS8#TR	Linear	获取价格	LT4256-1 and LT4256-2 - Positive High Voltage Hot Swap Controllers; Package: SO; Pins: 8;

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