International Rectifier Introduces 12V, 100A Active ORing Reference Design that Reduces Component Count and Size by 50%

International Rectifier, IR® introduced a reference design for +12V, 100A ORing applications. Active ORing has long replaced diode ORing in high current 12V systems due to system efficiency and cost benefits. Now, the IRAC5001 solution provides a further advance by reducing the number of FETs needed by 50% compared to rivals' equivalent TO-220 devices. In addition, solution volume is reduced by at least 60%, enabled by the DirectFET MOSFET double-sided cooling capability.

The reference design contains four IRF6609 20V, 2mOhm DirectFET^TM MOSFETs in parallel to create a 0.5mOhm effective RDS(on) for a high efficiency ORing circuit with fast fault detection and reaction time of 130ns.

The "FET Check" feature is enabled in this reference design, and allows real-time"FET-good" checking for extra fault protection and the highest possible reliability for high power systems.

Active ORing is a key efficiency requirement for many high-end systems requiring maximum up-time, such as carrier-class communication equipment, telecom and datacom system servers. IR's IR5001S IC is ideal for applications such as high reliability server and storage systems where "N+1" redundant power supplies feed into a central load.

Part Number	Rail Voltage (V)	Current (A)	Equivalent RDS(on) (mohms)	Featured Part	Description
IRAC5001-HS100A	+12	100	0.5	IR5001	+12V, 100A, 0.5mohm Active ORing Reference Design

Availability and Pricing
The IRAC5001-HS100A is available immediately. Pricing is US $250 each. Pricing is subject to change.