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| 型号： | LT4256-2IS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 213K |
| 描述： | IC CTRLR HOTSWAP HV AUTO 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 10.8 V ~ 80 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
LT4256-1/LT4256-2
1
425612fa
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
DESCRIPTIO
The LT
?/DIV>
4256-1/LT4256-2 are high voltage Hot Swap
TM
controllers that allow a board to be safely inserted and
removed from a live backplane. An internal driver drives an
external N-channel MOSFET switch to control supply
voltages ranging from 10.8V to 80V.
The LT4256-1/LT4256-2 features an adjustable analog
foldback current limit. If the supply remains in current limit
for more than a programmable time, the N-channel
MOSFET shuts off and the PWRGD output asserts low. The
LT4256-2 automatically restarts after a time-out delay.
The LT4256-1 latches off until the UV pin is cycled low.
The PWRGD output indicates when the output voltage
rises above a programmed level. An external resistor
string from V
CC
provides programmable undervoltage
protection.
The LT4256 can be used as an upgrade to LT1641 designs.
See Table 1 on page 14 for upgraded specifications.
The LT4256-1 and LT4256-2 are available in an 8-pin SO
package that is pin compatible with the LT1641.
?/DIV>
Hot Board Insertion
?/DIV>
Electronic Circuit Breaker/Power Bussing
?/DIV>
Industrial High Side Switch/Circuit Breaker
?/DIV>
24V/48V Industrial/Alarm Systems
?/DIV>
Ideally Suited for 12V, 24V and 48V Distributed
Power Systems
?/DIV>
48V Telecom Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
?/DIV>
Allows Safe Board Insertion and Removal from a
Live Backplane
?/DIV>
Controls Supply Voltage from 10.8V to 80V
?/DIV>
Foldback Current Limiting
?/DIV>
Overcurrent Fault Detection
?/DIV>
Drives an External N-Channel MOSFET
?/DIV>
Programmable Supply Voltage Power-Up Rate
?/DIV>
Undervoltage Protection
?/DIV>
Latch Off Operation Mode (LT4256-1)
?/DIV>
Automatic Retry (LT4256-2)
?/DIV>
Available in an 8-Pin SO Package
Positive High Voltage
Hot Swap Controllers
Hot Swap is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
4256 TA01
0.02&
LT4256-1/
LT4256-2
SENSE
6
2
3
4
8
7
1
5
V
CC
GATE
FB
PWRGD
UV
TIMER
GND
V
IN
48V
GND
(SHORT PIN)
IRF530
CMPZ5241B
11V
8.06k
64.9k
100&
4.02k
10&
36.5k
PWRGD
V
OUT
48V
2A
27k
C
L
33nF
0.1礔
10nF
SMAT70A
UV = 36V
PWRGD = 40V
48V, 2A Hot Swap Controller
PWRGD
50V/DIV
V
OUT
50V/DIV
INRUSH
CURRENT
500mA/DIV
V
IN
50V/DIV
2.5ms/DIV
4256 TA02
LT4256 Start-Up Behavior
C
L
= 225礔
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT4256-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Positive High Voltage Hot Swap Controller with Open-Circuit Detect |
| LT4256-3CGN | 功能描述:IC CTRLR HOTSWP HV DETECT 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LT4256-3CGN#PBF | 功能描述:IC CTRLR HOTSWP HV DETECT 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| LT4256-3CGN#TR | 功能描述:IC CTRLR HOTSWP HV DETECT 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LT4256-3CGN#TRPBF | 功能描述:IC CTRLR HOTSWP HV DETECT 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
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