The LT1641 is an 8-pin Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at a programmable rate. A high side switch driver controls an N-channel gate for supply voltages ranging from 9V to 80V. The chip features a programmable analog foldback current limit circuit. If the chip remains in current limit for more than a programmable time, the N-channel pass transistor turns off and is optionally set to automatically restart after a time-out delay. The PWRGD output indicates when the output voltage, sensed by the FB pin, is within tolerance. The ON pin provides programmable undervoltage lockout. The LT1641-1/LT1641-2 are recommended for new designs. The LT1641 is available in the 8-lead SO package. Applications * Hot Board Insertion * Electronic Circuit Breaker * Industrial High Side Switch/Circuit Breaker * 24V/48V Industrial/Alarm Systems * Allows Safe Board Insertion and Removal from a Live Backplane * Controls Supply Voltage from 9V to 80V * Programmable Analog Foldback Current Limiting * High Side Drive for an External N-Channel * Automatic Retry Capability * User Programmable Supply Voltage Power-Up Rate * Undervoltage Lockout * Overvoltage Protection * Available in 8-Lead SO Package https://elecena.pl/product/377819/positive-high-voltage-hot-swap-controller 2007-04-23 https://elecena.pl/product/377819/positive-high-voltage-hot-swap-controller 2016-04-27 https://elecena.pl/product/377819/positive-high-voltage-hot-swap-controller 2025-01-18