EEWORLDEEWORLDEEWORLD

Part Number

Search

LT4256-3

Description
Positive High Voltage Hot Swap Controller with Open-Circuit Detect
File Size304KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Compare View All

LT4256-3 Overview

Positive High Voltage Hot Swap Controller with Open-Circuit Detect

LT4256-3
Positive High Voltage
Hot Swap Controller
with Open-Circuit Detect
FEATURES
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
Allows Safe Board Insertion and Removal from a
Live Backplane
Controls Supply Voltage from 10.8V to 80V
Foldback Current Limiting
Open Circuit and Overcurrent Fault Detect
Drives an External N-Channel MOSFET
Automatic Retry or Latched Off Operation
After Overcurrent Fault
Programmable Supply Voltage Power-Up Rate
Open MOSFET Detection
1% Over and Undervoltage Detection Accuracy
Available in a 16-Lead SSOP Package
The LT
®
4256-3 is a high voltage Hot Swap 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 80V. The part features an open-circuit detect
(OPEN) output that indicates abnormally low load current
conditions.
The LT4256-3 also 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, the PWRGD output asserts low and the LT4256-3
either automatically restarts after a time-out delay or
latches off until the UV pin is cycled low (depending on the
status of the RETRY pin).
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 LT4256-3 is available in a 16-lead SSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
Hot Board Insertion
Electronic Circuit Breaker/Power Bussing
Industrial High Side Switch/Circuit Breaker
24V/48V Industrial/Alarm Systems
Ideally Suited for 12V, 24V and 48V Distributed
Power Systems
48V Telecom Systems
TYPICAL APPLICATIO
V
IN
48V
SMAT70A
(SHORT PIN)
64.9k
UV
0.01µF
4.02k
OV
4.02k
OPEN
TIMER
GND
33nF
GND
V
CC
0.020Ω
48V, 2A Hot Swap Controller
IRF540
+
CMPZ5241BS
11V
SENSE
10Ω
GATE
LT4256-3
V
OUT
FB
100Ω
10nF
36.5k
51k
C
L
V
OUT
48V
2A
V
IN
50V/DIV
4.02k
INRUSH
CURRENT
500mA/DIV
PWRGD
50V/DIV
PWRGD
4256 TA01
PWRGD
UV = 36V
OV = 73V
PWRGD = 40V
RETRY
U
TM
U
U
LT4256-3 Start-Up Behavior
CONTACT BOUNCE
V
OUT
50V/DIV
2.5ms/DIV
42563 TA02
42563f
1

LT4256-3 Related Products

LT4256-3 LT4256-3CGN
Description Positive High Voltage Hot Swap Controller with Open-Circuit Detect Positive High Voltage Hot Swap Controller with Open-Circuit Detect
LPC1788 data sheet is out, 100Mhz
LPC1788, 100Mhz CM3, supports LCD, SDRAM, USB, CAN, Ethernet, 5 serial ports, SD/MMC, QEI, motor control, data sheet is out!!Very powerful cortex M3 has LQFP package, compatible with LPC2478, the pric...
ppy521 NXP MCU
Ineng is the first HD player to use Intel chips
In 2009, home theaters will be replaced by home digital media centers. The "HD era" has arrived! At the beginning of the new year, Hong Kong brand Meditech officially launched a new sub-brand in the f...
爱清风 Talking
PD instrument test ASD916
ASD916 is a fast charging, PD bidirectional comprehensive tester, which is programmable. (This instrument can change the number of modules according to customer needs. There are 6 modules in total, na...
执着追求 Power technology
A graduate needs your help, thank you!
I am about to graduate, and I want to work in the embedded field after graduation. I am not a computer major, but I just learned it because I am interested in it. I have been learning C and assembly, ...
yph321 Embedded System
The milliseconds in the system time obtained by GetLocalTime are always 0
When running on the simulator, it is always 0. Does it not support such precision? Is there any other way to obtain it? Thank you...
hoohoo2002 Embedded System
[Perf-V Review] Flowing Light & Verilog Basic Syntax
[i=s]This post was last edited by donatello1996 on 2021-2-19 20:21[/i]During the Spring Festival holiday, I learned the basic usage of the VIVADO development environment and the basic syntax of the Ve...
donatello1996 FPGA/CPLD

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1122  2782  2191  2908  1766  23  57  45  59  36 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号