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參數(shù)資料
| 型號： | LT4254CGN#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 232K |
| 描述： | IC CTRLR HOTSWAP POSVOLT 16SSOP |
| 標準包裝： | 100 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電源電壓： | 10.8 V ~ 36 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SSOP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1341 (CN2011-ZH PDF) |
LT4254
1
4254fb
The LT
?/DIV>
4254 is a high voltage Hot Swap
TM
controller that
allows a board to be safely inserted and removed from a
live backplane. An internal driver controls the high side
N-channel MOSFET gate for supply voltages ranging from
10.8V to 36V. The part features an open-circuit detect
(OPEN) output that indicates abnormally low load current
conditions.
The LT4254 features an adjustable analog foldback cur-
rent limit. If the supply remains in current limit for more
than a programmable time, the N-channel MOSFET shuts
off, the PWRGD output goes low and the LT4254 either
automatically restarts after a time-out delay or latches off
until the UV pin is cycled low. The RETRY pin sets whether
the part will automatically restart after an overcurrent fault
or if it will latch 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 and
overvoltage protection.
?/DIV>
Hot Board Insertion
?/DIV>
Electronic Circuit Breaker/Power Bussing
?/DIV>
Industrial High Side Switch/Circuit Breaker
?/DIV>
24V Industrial/Alarm Systems
?/DIV>
12V and 24V Distributed Power Systems
?/DIV>
Allows Safe Board Insertion and Removal from a
Live Backplane
?/DIV>
Controls Supply Voltage from 10.8V to 36V
?/DIV>
Foldback Current Limiting
?/DIV>
Open Circuit and Overcurrent Fault Detect
?/DIV>
Drives an External N-Channel MOSFET
?/DIV>
Automatic Retry or Latched Off Operation
After Overcurrent Fault
?/DIV>
Programmable Supply Voltage Power-Up Rate
?/DIV>
Undervoltage and Overvoltage Protection
?/DIV>
Open MOSFET Detection
?/DIV>
Available in 16-Lead SSOP Package
Positive High Voltage
Hot Swap Controller
with Open-Circuit Detect
4254 TA01
R5
0.025&
LT4254
SENSE
V
CC
GATE
FB
PWRGD
RETRY
UV
OV
TIMER
GND
V
IN
24V
GND
(SHORT PIN)
Q1
IRF530
D1
CMPZ5241B
11V
R3
40.2k
R2
40.2k
R1
324k
R7
100&
R9
40.2k
R6
10&
R8
140k
PWRGD
V
OUT
24V
1.5A
R4
27k
C
L
C2
33nF
C3
0.1礔
C1
10nF
OPEN
UV = 20V
OV = 40V
PWRGD = 18V
24V, 2A Hot Swap Controller
V
IN
20V/DIV
V
OUT
20V/DIV
INRUSH
CURRENT
500mA/DIV
PWRGD
20V/DIV
2.5ms/DIV
4245 TA02
LT4254 Start-Up Behavior
DESCRIPTIO
FEATURES
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
C
L
= 168礔
CONTACT BOUNCE
TYPICAL APPLICATIO
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| LT4254IGN | 功能描述:IC CTLR HOTSWAP POS 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LT4254IGN#PBF | 功能描述:IC CTLR HOTSWAP POS 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LT4254IGN#TR | 功能描述:IC CTLR HOTSWAP POS 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LT4254IGN#TRPBF | 功能描述:IC CTLR HOTSWAP POS 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LT4256 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage Surge |
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