Analog Devices Inc. LTC4286 High Power Positive Hot-Swap Controller

Analog Devices Inc. LTC4286 High Power Positive Hot-Swap Controller offers an integrated solution for hot-swap applications. The device enables a board to be safely inserted and removed from a live backplane. The controller offers reliable protection against overstress via the circuit breaker timer that protects against metal-oxide-semiconductor field-effect transistor (MOSFET) overheating.

The ADI LTC4286 high-power positive hot-swap controller provides monitoring of board current, voltage, power, temperature, and fault status. These features result from the SMBus 3.1 interface, PMBus command structure, and onboard analog-to-digital converter (ADC) with selectable averaging and speed.

The device supplies additional features to respond to input undervoltage (UV) and overvoltage (OV):
• It interrupts the host when a fault occurs
• Notifies when the output power is good
• Detects board insertion and auto-reboot after a programmable delay following a host-commanded turn-off

Features

Wide 8.5V to 80V operating voltage range
Monitors currents, voltages, and power with ADC
6mV to 20mV adjustable, 5% accurate current limit
Current foldback limits MOSFET power dissipation for overstress protection
Monitors V_GS and V_DS for MOSFET health

Peak detect registers for current, voltage, and power
Reports input or output power
Remote temperature sensing with programmable warning and shutdown thresholds
±1% accurate, 12-bit ADC for I_OUT, V_IN, and V_OUT
Available in 39-lead, 7mm x 7mm, QFN package

Applications

High availability server backplane systems
12V/24V/48V/54V distributed power systems
Industrial

Analog Devices Inc. LTC4286 High Power Positive Hot-Swap Controller

Features

Applications

Block Diagram

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