IR5003

DESCRIPTION

The IR5001 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 IR5001 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 IR5001 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 IR5001 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