International Rectifier Introduces the Industry-First Dual-Side Cooling Power Package That Doubles Current Density in High Current DC-DC Converters.Technology Editors
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International Rectifier International Rectifier Corp. (NYSE: IRF) is a manufacturer of power semiconductors (MOSFET, IGBT, diodes and thyristors), located in El Segundo, California, USA. It has a market capitalization of 2.48 billion USD and is listed on the S&P Midcap 400. , IR(r) (NYSE NYSE
See: New York Stock Exchange :IRF IRF Interferon Regulatory Factor
IRF International Religious Freedom
IRF Institut for Rationel Farmakoterapi (German)
IRF Inherited Rights Filter (Novell)
IRF Inherited Rights Filter ) today introduced a breakthrough surface-mount power MOSFET A Power MOSFET is a specific type of Metal Oxide Semiconductor Field-Effect Transistor (MOSFET) designed to handle large powers. Compared to the other power semiconductor devices (IGBT, Thyristor... packaging technology called DirectFET(tm) power packaging.
The DirectFET packaging is the first surface-mount package in an SO-8 footprint designed for efficient top-side cooling.
In combination with improved bottom-side cooling, the new package can be cooled on both sides to cut MOSFET (Metal Oxide Semiconductor Field Effect Transistor) The most popular and widely used type of field effect transistor (see FET). MOSFETs are either NMOS (n-channel) or PMOS (p-channel) transistors, which are fabricated as individually packaged part count by up to 60% and shrink board space by as much as 50% compared to an SO-8 type solution. This effectively doubles current density, or amps per square inch.
A dual-side cooled DirectFET chipset enables DC-DC DC-DC Direct Current to Direct Current (power conversion) converters capable of 30A per phase with a single pair of MOSFETs, at a lower total system cost when compared to single-side cooled SO-8 designs and at a current density of over 24 amps per square inch, double that of the standard SO-8 solution.
The new devices are designed for high-frequency, high-current DC-DC converters used to power next generation Intel(r) and AMD microprocessors This article gives a list of Advanced Micro Devices (AMD) microprocessors, sorted by generation and release year. If applicable and openly known, the designation(s) of each processor's core (versions) is (are) listed in parentheses. found in high-end notebooks and servers, as well as advanced telecom and datacom systems. Multiphase Mul´ti`phase
a. 1. (Elec.) Having many phases;
Adj. 1. multiphase - of an electrical system that uses or generates two or more alternating voltages of the same frequency but differing in phase angle synchronous buck converters that power these CPUs must deliver currents of 20A per phase and above in reduced footprints.
Managing heat loads in high power microprocessor systems is a true challenge when the PCB PCB: see polychlorinated biphenyl.
in full polychlorinated biphenyl
Any of a class of highly stable organic compounds prepared by the reaction of chlorine with biphenyl, a two-ring compound. is the main source of heat dissipation Noun 1. heat dissipation - dissipation of heat
chilling, cooling, temperature reduction - the process of becoming cooler; a falling temperature . Standard SO-8 packages, as well as proprietary SO-8 derivatives such as bottomless and leadless SO-8, can only effectively be cooled on one side through their connection to the PCB due to their poor top-side thermal resistance, adding to the thermal challenge.
"The DirectFET technology is the first surface-mount package designed from the ground up to be a power semiconductor package. It is also the first surface-mount package designed for dual side cooling where the use of heatsinks or thermal pads removes the heat away from the PCB and provides tremendous system benefits," said Carl Blake, DC-DC Marketing Manager for Computing at International Rectifier.
DirectFET packaging can be leveraged to reach high current levels without paralleling MOSFETs, adding an additional phase in multiphase converters, using heat pipes or fans, or adding copper throughout the whole PCB, all of which reduce current density and add system cost. When comparing DirectFET solutions to these alternative designs, DirectFET is the most economical solution, with at least a 50% reduction in the cost of heat removal, and provides the smallest space requirement.
In the DirectFET package, the silicon die is contained into a copper housing. The bottom of the package consists of a die specifically designed with source and gate contact pads that can be soldered directly to the PCB. The copper "can" forms the drain connection from the other side of the die to the board. The large-area contacts combined with the copper housing significantly improve heat dissipation compared to a plastic molded package: the junction-to-PCB thermal resistance is reduced to one degree Celsius per watt maximum, compared to 20 degrees Celsius per watt maximum for a standard SO-8 package.
The copper housing provides a heatsink surface, improving junction-to-case thermal resistance to 3 degrees Celsius per watt compared to 18 degrees Celsius per watt for a standard SO-8. With the use of heatsinks and cooling airflow, the DirectFET package dissipates 50% more heat through the top of the package than a plastic-molded package SO-8, reducing operating temperatures by up to 50 degrees Celsius and enabling more than doubled system currents.
The DirectFET package has a height of 0.7mm, while the SO-8 is 1.75mm, which is a further advantage in space-constrained applications such as notebook computers and 1U servers. The DirectFET package is bromide bromide, any of a group of compounds that contain bromine and a more electropositive element or radical. Bromides are formed by the reaction of bromine or a bromide with another substance; they are widely distributed in nature. and lead-free. The devices are compatible with existing high-volume manufacturing equipment and processes.
The first four DirectFET devices are the IRF6601, IRF6602, IRF6603 and IRF6604. Data sheets are posted:
IRF6601: http://www.irf.com/product-info/datasheets/data/irf6601.pdf IRF6602: http://www.irf.com/product-info/datasheets/data/irf6602.pdf IRF6603: http://www.irf.com/product-info/datasheets/data/irf6603.pdf IRF6604: http://www.irf.com/product-info/datasheets/data/irf6604.pdf
Pricing and Availability
Samples are available immediately. Production release is in the third quarter of 2002. Pricing starts at US $0.77 each in 10,000-unit quantity.
About International Rectifier
International Rectifier is recognized as a leading supplier of power semiconductors and systems solutions. IR's patented HEXFET HEXFET Hexagonal Field Effect Transistor (r) power MOSFETs, IGBTs and high-voltage ICs make electricity work smarter in industrial automation and controls, automotive electrical systems, consumer electronics, computers and peripherals, telecommunications, lighting and satellite/launch vehicle applications.
IR(r) and HEXFET(r) are registered trademarks of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders.
For more information, contact Joe Engle, email@example.com, 310-252-7019.