Analog Devices Inc. LTC4283 Negative Voltage Hot Swap Controllers drive an external N-channel MOSFET that allows a circuit board to be safely inserted and removed from a live backplane. The devices feature programmable current limits with foldback and independently adjustable in-rush currents to optimize the MOSFET safe-operating area (SOA). The SOA timer limits MOSFET temperature rises for reliable protection against being overstressed. An I2C interface and onboard gear-shift analog-to-digital converter (ADC) allow monitoring of board current, voltage, power, energy, and fault status.
Features
Allows safe insertion into live –48V backplanesProtects MOSFET with SOA timerProgrammable 15mV to 30mV current limit sense voltage with 2% accuracy and adjustable foldback8-bit to 16-bit gear-shift ADC with 0.5% accuracyMonitors voltages, currents, power, and energyNonvolatile configuration and fault recording
Applications
Telecom infrastructure–48V distributed power systems
