The MAX5930A/MAX5931A/MAX5931B +1V to +15V
triple hot-swap controllers provide complete protection
for multisupply systems. They allow the safe insertion
and removal of circuit cards into live backplanes. These
devices hot swap multiple supplies ranging from +1V to
+15V, provided one supply is at or above +2.7V. The
input voltage rails (channels) can be configured to
sequentially turn-on/off, track each other, or have completely
independent operation.
The discharged filter capacitors of the circuit card provide
low impedance to the live backplane. High inrush currents
from the backplane to the circuit card can burn up
connectors and components, or momentarily collapse the
backplane power supply leading to a system reset. The
MAX5930A/MAX5931A/MAX5931B hot-swap controllers
prevent such problems by gradually ramping up the output
voltage and regulating the current to a preset limit
when the board is plugged in, allowing the system to stabilize
safely. After the startup cycle is complete, on-chip
comparators provide VariableSpeed/BiLevel? protection
against short-circuit and overcurrent faults, and provide
immunity against system noise and load transients.