DESCRIPTION
●The LM5068 hot-swap controller provides intelligent control of power supply connections during the insertion and removal of circuit cards powered by live system backplanes.
●The LM5068 provides both in-rush current control and short-circuit protection functions, and limits power supply transients in the backplane caused by the insertion of additional circuit cards. The LM5068 controls the external N-Channel MOSFET to provide programmable load current limiting and circuit breaker functions using a single external current sense resistor. The LM5068 issues a power good (PWRGD) signal at the conclusion of a successful power-on sequence. Input over-voltage or under - voltage fault conditions will cancel the PWRGD indication.
●FEATURES
●• Safe Module Insertion and Removal from Live Backplanes
●• In-Rush Current Limiting for Safe Board Insertion into Live Backplanes
●• Fast Response to Over-Current Fault Conditions with Active Current Limiting
●• -10V to -90V Input Range
●• Programmable Under-Voltage/Over-Voltage Shutdown Protection with Adjustable Hysteresis
●• Programmable Multi-Function Timer for Board Insertion De-Bounce Delay
●• Fault Timer Avoids Nuisance Trips Caused by Short Duration Load Transients
●• Active Gate Clamping During Initial Power Application
●• Available in both Latched Fault and Automatic Re-Try Versions
●• Available with either Active HIGH or Active LOW Power Good Flag
●APPLICATIONS
●• - 48V Power Modules
●• Central Office Switching
●• Distributed Power Systems
●• Electronic Circuit Breaker
●• PBX Systems
●• Negative Power Supply Control
