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參數資料
| 型號： | LTC4280IUFD#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數： | 1/28頁 |
| 文件大小： | 291K |
| 描述： | IC CTLR HOT SWAP I2C MON 24QFN |
| 標準包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 無 |
| 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 |
| 供應商設備封裝： | 24-QFN（5x4） |
| 包裝： | 帶卷 (TR) |
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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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