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2022-09-24 23:30:48
LTC1645C - Dual Hot Swap Controller/Power Sequencing
Allows safety board insertion into live backplane removal Programmable power sequencing Programmable electronic circuit breaker
Ensures correct power-up behavior Undervoltage lockout glitch filter prevents spurious reset signals
The LTC®1645 is a dual-channel Thermal SwapTM controller that allows boards to be safely inserted and removed from a live backplane. Using external N-channel transistors, the supply voltage can be ramped at a programmable ramp rate. Two high-side switch drivers control N-channel gates for supply voltages ranging from 1.2V to 12V. “The two channels can be set to rise and fall separately, or they can be programmed to rise and fall simultaneously, ensuring power tracking for both outputs. Programmable electronic circuit breakers prevent shorts on either output. The RESET output can be used to generate the system Reset when the supply voltage is below the user programmed voltage. An additional backup compare can be used to monitor the second supply voltage.