资 源 简 介
The LT®1641-1/LT1641-2 are 8-pin Hot SwapTM controllersthat allow a board to be safely inserted and removedfrom a live backplane. Using an external N-channel passtransistor, the board supply voltage can be ramped up ata programmable rate. A high side switch driver controls anN-channel gate for supply voltages ranging from 9V to80V.The chips feature a programmable analog foldback currentlimit circuit. If the chips remain in current limit formore than a programmable TIme, the N-channel passtransistor is either latched off (LT1641-1) or is set toautomaTIcally restart after a TIme-out delay (LT1641-2).The PWRGD output indicates when the output voltage,sensed by the FB pin, is within tolerance. The ON pinprovides programmable undervoltage lockout.The LT1641-1/LT1641-2 are available in the 8-lead SOpackage.
