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LTC4261 Datasheet(PDF) 1 Page - Analog Devices |
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LTC4261 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 74 page  LTC4283 1 Rev. B For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION Negative Voltage Hot Swap Controller with Energy Monitor The LTC®4283 negative voltage hot swap controller drives an external N-channel MOSFET to allow a board to be safely inserted and removed from a live backplane. The device features programmable current limit with foldback and independently adjustable inrush current to optimize the MOSFET safe operating area (SOA). The SOA timer limits MOSFET temperature rise for reliable protection 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 MOSFET 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. –48V/600W Hot Swap Controller with Telemetry LTC4283 Startup Behavior APPLICATIONS n Allows Safe Insertion into Live –48V Backplanes n Protects MOSFET with SOA Timer n Programmable 15mV to 30mV Current Limit Sense Voltage with <3.3% Accuracy and Adjustable Foldback n 8-Bit to 16-Bit Gear-Shift ADC with 0.7% Accuracy n Monitors Voltages, Currents, Power and Energy n Nonvolatile Configuration and Fault Recording n Floating Topology for Rugged High Voltage Operation n Selectable Inrush Control: dV/dt or Current Limit n I2C/SMBus or Single-Wire Broadcast Interfaces n Min/Max ADC Measurement Logging with Alerts n Reboots on I2C Command with Programmable Delay n Adjustable Input UV/OV Thresholds and Hysteresis n 38-Pin 5mm × 7mm QFN Package n Telecom Infrastructure n –48V Distributed Power Systems n Servers and Data Centers n Power Monitors All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 8230151, 7382167, 9634480, 9634481, 10263414. 487k 1µF 0.5m 4×1k IN SERIES 0.25W EACH 0.1µF 4 4 4 5.11k PSMN4R8-100BSE ×2 470 100k 14.3k 10k 200k 5.11k 200k 100nF 500µF 4.7nF 68nF 18.2k 1.13M RTN UVH UVL OV –48V INPUT ADIN TMR VEE INTVCC SENSE+ GATE DRAIN VZ VIN RTNS SCL SDAI SDAO ALERT# ADIO PGIO LTC4283 RTN (SHORT PIN) VEE DRNS EN# UV = 38.6V UV RELEASE AT 43.1V OV = 71.9V OV RELEASE AT 70.7V VEE 4283 TA01a VEE VEE VEE VEE RAMP SENSE– VOUT + – VLOAD 25ms/DIV 4283 TA01b VGATE 10V/DIV VOUT 50V/DIV –48V INPUT 50V/DIV IINRUSH 5A/DIV CONTACT BOUNCE 128ms DEBOUNCE |
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Similar Description - LTC4261 |
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