●Product Details
●The ADM1073 is a full-feature, negative voltage, hot swap controller that allows boards to be safely inserted and removed from a live −48 V backplane. The part provides precise and robust current limiting, and protection against both transient and nontransient short circuits in overvoltage and undervoltage conditions. The ADM1073 can operate from a negative voltage of −18 V to −80 V and can tolerate transient voltages of up to −200 V.
●Inrush current is limited to a programmable value by control-ling the gate drive of an external N-channel FET. The maximum current limit is set by the choice of the sense resistor, RSENSE.
●A built-in soft start function allows control of the inrush current profile by an external capacitor on the soft start (SS) pin.
●An external capacitor on the TIMER pin determines the time for which the FET gate is controlled to be high when maximum inrush current flows. The ADM1073 employs a limited consec-utive retry scheme, whereby, if the load capacitance is not fully charged within one attempt, the FET gate is pulled low and retries after a cooling period.
●### Features and Benefits
● Precision In-Rush Linear Current Limit
● Adjustable Soft Start In-Rush Current Limit Profiling
● Precision Maximum On Time in Current Limit
● Max On-Time Modulated by FET Drain Voltage for Additional SOA Protection
● Adjustable PWM Retry Scheme and Multiple Device Cascading
● Capability for Charging Large Capacitive Loads
● Shunt Regulator Topology Allows For Very Large Transient Input Supplies
● Precision UnderVoltage and OverVoltage Monitors with Separate UV and OV Pins and Programmable UV and OV Hysteresis
Part 3D Model
