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參數(shù)資料
| 型號： | LT4254 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Positive High Voltage Hot Swap Controller with Open-Circuit Detect |
| 中文描述： | 正高電壓熱插拔控制器與開路檢測 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大小： | 271K |
| 代理商： | LT4254 |
LT4254
1
4254f
The LT
4254 is a high voltage Hot Swap
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.
The LT4254 is available in a 16-lead SSOP package.
TM
controller that
I
Hot Board Insertion
I
Electronic Circuit Breaker/Power Bussing
I
Industrial High Side Switch/Circuit Breaker
I
24V Industrial/Alarm Systems
I
12V and 24V Distributed Power Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
I
Allows Safe Board Insertion and Removal from a
Live Backplane
I
Controls Supply Voltage from 10.8V to 36V
I
Foldback Current Limiting
I
Open Circuit and Overcurrent Fault Detect
I
Drives an External N-Channel MOSFET
I
Automatic Retry or Latched Off Operation
After Overcurrent Fault
I
Programmable Supply Voltage Power-Up Rate
I
Undervoltage and Overvoltage Protection
I
Open MOSFET Detection
TYPICAL APPLICATIO
U
Positive High Voltage
Hot Swap Controller
with Open-Circuit Detect
4254 TA01
R5
0.025
LT4254
SENSE
13
10
5
7
8
16
15
1
2
4
10
V
CC
GATE
FB
PWRGD
GND
RETRY
UV
OV
TIMER
V
IN
24V
GND
(SHORT PIN)
Q1
IRF530
D1
CMPZ5241B
11V
R3
40.2k
R2
40.2k
R1
324k
R7
100
C1
10nF
R9
40.2k
R6
10
R8
140k
PWRGD
V
OUT
24V
1.5A
R4
27k
C
L
C2
33nF
C3
0.1
μ
F
OPEN
UV = 20V
OV = 40V
PWRGD = 18V
24V, 2A Hot Swap Controller
PWRGD
20V/DIV
V
CC
20V/DIV
V
20V/DIV
GATE
20V/DIV
2.5ms/DIV
4245 TA02
CONTACT BOUNCE
LT4254 Start-Up Behavior
DESCRIPTIOU
FEATURES
APPLICATIU
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT4254CGN | Positive High Voltage Hot Swap Controller with Open-Circuit Detect |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT4254CGN | 功能描述:IC CTRLR HOTSWAP POSVOLT 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標準包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LT4254CGN#PBF | 功能描述:IC CTRLR HOTSWAP POSVOLT 16SSOP 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 |
| LT4254CGN#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 |
| LT4254CGN#TRPBF | 功能描述:IC CTRLR HOTSWAP POSVOLT 16SSOP 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 | 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 |
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