參數(shù)資料
型號(hào)： LTC4280IUFD#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 1/28頁(yè)
文件大小： 291K
描述： IC HOT SWAP CONTROLLER 24-QFN
標(biāo)準(zhǔn)包裝： 73
類型： 熱交換控制器
應(yīng)用： 通用
內(nèi)部開(kāi)關(guān)： 是
電源電壓： 2.9 V ~ 15 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-QFN（5x4）
包裝： 管件
LTC4280
1
4280f
 TYPICAL APPLICATION
 DESCRIPTION
Hot Swap Controller with
I
2
C Compatible Monitoring
The LTC
?/DIV>
4280 Hot Swap" controller allows a board to be
safely inserted and removed from a live backplane. Using
an external N-channel pass transistor, board supply voltage
and inrush current are ramped up at an adjustable rate.
An I
2
C interface and onboard ADC allow for monitoring
of load current, voltage and fault status.
The device features adjustable analog foldback current
limit and a FILTER pin which con gures the time spent in
overcurrent before declaring a fault. An I
2
C interface may
con gure the part to latch off or automatically restart after
the LTC4280 detects a current limit fault.
The controller has additional features to interrupt the host
when a fault has occurred, notify when output power is
good, detect insertion of a load card, and power-up either
automatically upon insertion or wait for an I
2
C command
to turn on.
 FEATURES
 APPLICATIONS
n
  Live Board Insertion
n
  Electronic Circuit Breakers
n
  Computers, Servers
n
  Platform Management
n
  Allows Safe Insertion into Live Backplane
n
  8-Bit ADC Monitors Current and Voltage
n
  I
2
C/SMBus Interface
n
  Wide Operating Voltage Range: 2.9V to 15V
n
  Adjustable Overcurrent Filter Time
n
  High Side Drive for External N-Channel MOSFET
n
  No External Gate Capacitor Required
n
  Input Overvoltage/Undervoltage Protection
n
  Optional Latchoff or Auto-Retry After Faults
n
  Alerts Host After Faults
n
  Inrush Current Limit with Foldback
n
  Available in 24-Pin 4mm ?5mm QFN Package
+
UV  V
DD
SENSE
+
SENSE

LTC4280
GATE
TIMER   FILTER
ON
GND
SOURCE
OV
SDAO
SDAI
SCL
ALERT
INTV
CC
FB
EN
ADIN
GPIO
3.4k
PLUG-IN
CARD
1.18k
P6KE16A
10?/DIV>
0.005?/DIV>
FDC653N
30.1k
V
OUT
12V
3.57k
24k
4280 TA01
C
L
INTV
CC
INTV
CC
0.1糉
0.1糉
34.8k
BACKPLANE
47nF
GND
ALERT
SCL
SDA
12V
V
OUT
10V/DIV
V
GPIO
(POWERGOOD)
10V/DIV
INRUSH
CURRENT
2.5A/DIV
V
DD
10V/DIV
50ms/DIV
4280 TA02
C
L
 = 12000糉
CONTACT
BOUNCE
12V Application with 5A Circuit Breaker
Start-Up Waveform
L, LT, LTC, LTM, Linear Technology, the Linear logo and Hot Swap are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
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參數(shù)描述
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