Analog Devices LTC4284 | Demoboard DC2470A

Beschreibung

The LTC®4284 negative voltage hot swap controller drives external N-channel MOSFETs to allow a board to be safely inserted and removed from a live backplane. The dual-gate, multi-mode drivers optimize the MOSFET safe oper¬ating area (SOA) for a variety of power levels. The SOA timer limits MOSFET temperature rise for reliable protec¬tion against overstresses. An I2C interface and onboard gear-shift ADC allow moni¬toring of board current, voltage, power, energy, and fault status. An available single-wire broadcast mode simplifies the interface by eliminating two isolators. The included EEPROM provides black-box capturing and nonvolatile configuration of fault behavior. Additional features respond to input UV/OV, interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a board, turn off the MOSFETs if an external supply monitor fails to indicate power good within a timeout period, and auto-reboot after a program¬mable delay following a host commanded turn-off.

Eigenschaften

• Drives Two Gates for High Power Applications
• Configurable Parallel, Staged Start or Single Modes
• Protects MOSFET with SOA Timer
• Programmable 15mV to 30mV Current Limit Sense Voltage with 2% Accuracy and Adjustable Foldback
• 8-Bit to 16-Bit Gear-Shift ADC with 0.5% Accuracy
• Monitors Voltages, Currents, Power and Energy
• Nonvolatile Configuration and Fault Recording
• Floating Topology for Rugged High Voltage Operation
• Selectable Inrush Control: dV/dt or Current Limit
• I2C/SMBus or Single-Wire Broadcast Interfaces
• Min/Max ADC Measurement Logging with Alerts
• Reboots on I2C Command with Programmable Delay
• Adjustable Input UV/OV Thresholds and Hysteresis
• 44-Pin 5mm × 8mm QFN Package

Typische Anwendungen

• Telecom Infrastructure
• Servers and Data Centers
• –48V Distributed Power Systems / Power Monitors

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers