News & Events
Intersil Introduces Industry's First High-Voltage OR-ing FET Controller IC Suitable for Telecom and Datacom Power Distribution Applications
-- New IC reduces losses caused by OR-ing diodes, improves efficiency, reduces heat and ensures reliability for power distribution
MILPITAS, CA, April 7, 2004 Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high performance analog solutions, today announced the release of the industrys first positive high-voltage OR-ing FET controller IC, the Endura ISL6144. Operating over a range of +10 to +75 V, this new device is designed to replace lossy diodes in power distribution applications, thus greatly improving power efficiency, reducing heat and ensuring reliability. Until now, a low-loss, high-efficiency OR-ing solution for power distribution has not been available to the above 30-V telecom and datacom markets.
The ISL6144 represents a significant technological milestone toward improving system power efficiency and reliability, said Cindy Drapcho, Vice President of Intersils Power Products. With ever increasing populations and resulting expanding communications infrastructures, energy conservation, operating costs and system reliability are key considerations. The ISL6144 joins our PWM power ICs to help telecom/datacom designers attain these important high-performance goals.
The traditional solution to OR-ing power sources to ensure uninterrupted system operation through power source redundancy has been the use of diodes. Two or more power sources can be connected in parallel to power the same system, with each power source effectively isolated from the other. Using diodes to do this is a simple solution but it is also a costly one in terms of wasted power, voltage drop and generated heat.
The power loss across a typical OR-ing diode passing a 20-A current is in the range of 10 to 14 W, whereas only 2 W is lost in a 5-milliohm MOSFET conduction resistance. In addition, heat-sinking requirements are greatly diminished. With the introduction of Intersils new ISL6144 OR-ing FET controller IC, telecom and datacom designers can greatly improve power distribution efficiency by replacing the diodes with low-loss N-channel MOSFETs. When multiplied by the number of supplies the power savings is significant and greatly reduces system-threatening heat.
Additionally, a diode itself has no way of offering monitoring or protection. When a diode fails, it initially shorts, removing the isolation between supplies. This loss of isolation causes one supply to act as a load for the other, or others, thus providing a path for back current that eventually causes the failure of the supply and brings the system down. The ISL6144 + MOSFET solution offers monitoring and protection features that ensure the reliability of the system.
ISL6144 Technical Summary
- Wide supply range of +10 to +75 V with +100-V transient capability
- Internal charge pump to drive N-channel MOSFET
- Less than 0.3 us shut-off time to isolate shorted supply
- Resistor adjustable trip level to reduce sensitivity to SMPS noise
- Hysteretic regulating amplifier allows quiet, 100-us MOSFET turn off for power supply ramp down to minimize noise and avoid system upset
- Active-low fault pin to report failed power feed including shorted MOSFET terminals to prevent catastrophic system failure a feature diodes do not have
- 20-pad 5 X 5 mm QFN package or 16 lead TSSOP package - Meet UL60950 (UL1950) requirements for HV pin spacing
- Industrial temperature range, -40 to +85 degrees C
- More: http://www.intersil.com/power/powersupply.asp
The ISL6144 is available now in choice of QFN (ISL6144IR) or TSSOP (ISL6144IV) package. The suggested resale price in 100 to 999 unit quantities is $2.60 for each IC. About Intersil
Intersil Corporation, a NASDAQ 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company’s products address three of the industry’s fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, switching DC-DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and rad-hard applications. For more information about Intersil or to find out how to become a member of our winning team, visit the company’s web site and career page at www.intersil.com.
This release may include "forward looking statements" that are subject to risks and uncertainties. For information identifying economic, political, climatic, currency, regulatory, technological, competitive and some other important factors that could cause actual results to differ materially from those anticipated in the forward looking statements, see Intersil’s Safe Harbor Forward Looking Statement disclaimer found at http://www.intersil.com/legal.asp, as well as Intersil’s SEC filings as updated from time to time, found at http://www.sec.gov. Intersil and Endura are trademarks of Intersil Americas Inc.
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