General Description

The HV302 and HV312 Hotswap Controllers perform current limiting, circuit breaker protection, over and under voltage detection power management functions during insertion of cards or modules into live backplanes and connectors. Theymaybe used in systems where active control is implemented in the negative lead of supplies ranging from -10V to -90V or +10V to +90V.

Features

-10V to 90V or +10V to +90V Operation

Four PWRGD Flags with Programmable Delays

Integrated “normally-on” Gate Clamp eliminates components

UV/OV Lock Out & Power-On-Reset (POR) for Debouncing

Sense resistor programmed Circuit Breaker & Servo Limit

Programmable Circuit Breaker Delay

Inrush control using either: Servo or Feedback Capacitor

Feedback to RAMP pin saves gate protection components

100ms Start Up Timeout Protection for Output Overload

Programmable Inrush Current di/dt Control

Programmable Auto-Retry(tens of seconds if desired)

Auto-Retryor Latched Operation

Application solution for input voltage step (diode “ORing”)

Enable through Open Drain interface to UV or OV

LowPower, 0.6mA Active Mode, 0.4mA Sleep Mode

Small SOIC-14 Package

Applications

-48V Telecom and Networking

-24V Cellular and Fixed Wireless Systems

-24V PBX Systems

Power Over LAN (IEEE802.3)

Distributed Power Systems

Power SupplyControl

+48V Servers and SANs

Hotswap Control of Diode ORed Multiple Power Sources

Cooling Fan Systems