基于LTC4280設(shè)計的熱插拔控制技術(shù)
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LTC4280: Hot Swap Controller with I2C Compatible Monitoring
The LTC4280 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 confi gures the time spent in overcurrent before declaring a fault. An I2C interface may confi 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 I2C command to turn on.
LTC4280主要特性:
Allows Safe Insertion into Live Backplane
8-Bit ADC Monitors Current and Voltage
I2C/SMBus Interface
Wide Operating Voltage Range: 2.9V to 15V
Adjustable Overcurrent Filter Time
High Side Drive for External N-Channel MOSFET
No External Gate Capacitor Required
Input Overvoltage/Undervoltage Protection
Optional Latchoff or Auto-Retry After Faults
Alerts Host After Faults
Inrush Current Limit with Foldback
Available in 24-Pin 4mmx 5mm QFN Package
LTC4280應(yīng)用:
Live Board Insertion
Electronic Circuit Breakers
Computers, Servers
Platform Management
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