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2022-09-24 23:32:00
LT1640 - Negative Voltage Hot Swap Controller
Features allow SB insertion and removal from the field - 48V backplane operating from -10V to -80V
Programmable Inrush Current Programmable Electronic Circuit Breaker Programmable Overvoltage Protection Programmable Undervoltage Lockout Power Supply Control Good Output
Central Office Exchange
-48V Distributed Power System Negative Power Control
The LT®1640L/LT1640H is an 8-pin, negative voltage Thermal SwapTM controller that allows the board to be safely inserted from a live backplane. The inrush current is limited to a programmable control gate value to the voltage of an external N-channel transistor. The transistor is turned off if the input voltage passes a programmable undervoltage threshold or greater than the overvoltage threshold. A programmable electronic circuit breaker protection system for shorts. The PWRGD (LTC1640L) or PWRGD (LTC1640H) signal can be used to directly enable the power module. The LT1640L is designed with a low enable input and a module with a high enable input as the LT1640H module.