Date: 19/09/2011

5, 6 and 8-phase dual output PWM controllers with improved energy efficiency

A new digital power platform that improves energy efficiency in a wide variety of applications, including high performance server, desktop and computing applications has been introduced by International Rectifier.

IR explains that the new family of digital controllers is based on CHiL's proven digital platform provides these 5, 6 and 8-phase dual output PWM controllers in which phases are flexibly assigned between loops 1 and 2 can be easily configured for Intel VR12, AMD SVI/PVI/G34.

"With millions of controllers already shipped, IR's digital solution is field proven, delivering the highest efficiency into the latest computing platforms. As a market leader in enterprise power, and a driving force in the adoption of digital control into the data center, communications, computing and graphics markets, we are pleased with the significant ramp in production we are currently experiencing," said Tim Phillips, Vice President and General Manager, IR's Enterprise Power Business Unit. "

Key features of digital controller as listed by IR include:
variable gate drive and dynamic phase control and programmable 1-phase or 2-phases
adaptive transient algorithm (ATA) on both loops to minimize output bulk capacitors and system cost,
auto-phase detection with auto-compensation and per-loop protection
I2C, SMBus and PMBus system interface for full telemetry and programmability
Non-volatile memory for custom configuration,
3.3V tri-state driver compatible,
+3.3V supply voltage
0ºC to 85ºC ambient operation
frequency between 200 kHz to 1.2 MHz per phase

Specifications
Digital Control ICs
Part Number Package Control Loops Phases
IR3541 QFN 6 x 6 Dual Loop 4+1
IR3536 QFN 7 x 7 Dual Loop 5+1
IR3538 QFN 8 x 8 Dual Loop 7+1

Price and Availability: Pricing ranges from US $2.00 each for the IR3541 to US $3.25 each for the IR3538 in 1,000 unit-quantities. Production orders are available immediately. Prices are subject to change.

For more information visit: www.irf.com