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| 型号： | LTC4280IUFD#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC24 |
| 封装： | 4 X 5 MM, PLASTIC, MO-220, QFN-24 |
| 文件页数： | 1/28页 |
| 文件大小： | 286K |
| 代理商： | LTC4280IUFD#TR |
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LTC4280
1
4280f
TYPICAL APPLICATION
DESCRIPTION
Hot Swap Controller with
I2C Compatible Monitoring
The LTC
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 I2C 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 congures the time spent in
overcurrent before declaring a fault. An I2C interface may
congure 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 I2C 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 I2C/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 VDD SENSE
+
SENSE–
LTC4280
GATE
TIMER
FILTER
ON
GND
SOURCE
OV
SDAO
SDAI
SCL
ALERT
INTVCC
FB
EN
ADIN
GPIO
3.4k
PLUG-IN
CARD
1.18k
P6KE16A
10Ω
0.005Ω
FDC653N
30.1k
VOUT
12V
3.57k
24k
4280 TA01
CL
INTVCC
0.1μF
CONNECTOR
2
CONNECTOR
1
0.1μF
34.8k
BACKPLANE
47nF
GND
ALERT
SCL
SDA
12V
VOUT
10V/DIV
VGPIO
(POWERGOOD)
10V/DIV
INRUSH
CURRENT
2.5A/DIV
VDD
10V/DIV
50ms/DIV
4280 TA02
CL = 12000μF
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4280IUFD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Hot Swap Controller with I2C Compatible Monitoring |
| LTC4290 | 制造商:LINER 制造商全称:Linear Technology 功能描述:8-Port PoE/PoE PSE Controller |
| LTC4290AIUJ#PBF | 制造商:Linear Technology 功能描述:IC POE 802.3AT 8-PORT PSE 制造商:Linear Technology 功能描述:PSE CONTROLLER, 8PORT, 57V, QFN-40; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:40; Duty Cycle (%):6.3%; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:40-QFN;RoHS Compliant: Yes |
| LTC4290AIUJ#TRPBF | 制造商:Linear Technology 功能描述:IC POE 802.3AT 8-PORT PSE 制造商:Linear Technology 功能描述:PSE CONTROLLER, 8PORT, 57V, QFN-40; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:40; Duty Cycle (%):6.3%; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:40-QFN;RoHS Compliant: Yes |
| LTC4290BIUJ#PBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 40-Pin QFN EP 制造商:Linear Technology 功能描述:IC POE 802.3AT 8-PORT PSE 40-QFN 制造商:Linear Technology 功能描述:POE PSE CONTROLLER IEEE802.3A 制造商:Linear Technology 功能描述:POE PSE CONTROLLER, IEEE802.3AT, 40QFN 制造商:Linear Technology 功能描述:CONTROLLER, PSE, 3.3V, QFN-40; Input Voltage:3.3V; Supply Current:10mA; Digital IC Case Style:QFN; No. of Pins:40; Duty Cycle (%):6.3%; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C ;RoHS Compliant: Yes |
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