DESCRIPTION
●The IR5001S is a universal high-speed controller and N-channel power MOSFET driver for Active ORing and reverse polarity protection applications. The output voltage of the IR5001S is determined based on the polarity of the voltage difference on its input terminals. In particular, if the current flow through an N-channel ORing FET is from source to drain, the output of the IR5001S will be pulled high to Vcc, thus turning the Active ORing FET on. If the current reverses direction and flows from drain to source (due to a short-circuit failure of the source, for example), the IC will quickly switch the Active ORing FET off. Typical turn-off delay for the IR5001S is only 130nS, which helps to minimize voltage sags on the redundant dc voltage.
●FEATURES
●Controller / driver IC in an SO-8 package for implementation of Active ORing / reverse polarity protection using N-channel Power MOSFETs
●Suitable for both input ORing (for carrier class telecom equipment) as well as output ORing for redundant DC-DC and AC-DC power supplies
●130ns Typical Turn-Off delay time
●3A Peak Turn-Off gate drive current
●Asymmetrical offset voltage of the internal high-speed comparator prevents potential oscillations at light load
●Ability to withstand continuous gate short conditions
●Integrated voltage clamps on both comparator inputs allow continuous application of up to 100V
●Option to be powered either directly from 36-75V universal telecom bus (100V max), or from an external bias supply and bias resistor
●Input/Output pins to determine the state of the Active ORing circuit and power system redundancy
●APPLICATIONS
●-48V/-24V Input Active ORing for carrier class communication equipment
●Reverse input polarity protection for DC-DC power supplies
●24V/48V output active ORing for redundant AC-DC rectifiers
●Low output voltage (12V, 5V, 3.3V...) active ORing for redundant DC-DC and AC-DC power supplies
●Active ORing of multiple voltage regulators for redundant processor power
