International Rectifier Introduces High-Voltage Buck Control ICs for Constant LED Current Regulation.EL SEGUNDO, Calif. -- International Rectifier, 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 ), a world leader in power management technology, today introduced a high-voltage, high-frequency buck regulator control IC for AC-DC offline, non-isolated applications requiring multiple light-emitting diode (LED) circuits or requiring DC-DC DC-DC Direct Current to Direct Current (power conversion) color-mixing capabilities. Applications include indoor and outdoor signage as well as architectural, entertainment, design and decorative lighting. Rated at 200V or 600V, the IRS An abbreviation for the Internal Revenue Service, a federal agency charged with the responsibility of administering and enforcing internal revenue laws. 254x series incorporates a continuous mode, time-delayed hysteretic hys·ter·e·sis n. pl. hys·ter·e·ses The lagging of an effect behind its cause, as when the change in magnetism of a body lags behind changes in the magnetic field. buck regulator to control the average load current within a tolerance of five percent, using an accurate on-chip band gap voltage reference. An external high-side bootstrap See boot. (operating system, compiler) bootstrap - To load and initialise the operating system on a computer. Normally abbreviated to "boot". From the curious expression "to pull oneself up by one's bootstraps", one of the legendary feats of Baron von Munchhausen. circuit drives the buck switching element at high frequencies up to 500kHz. A low-side driver is also provided for synchronous rectifier rectifier, component of an electric circuit used to change alternating current to direct current. Rectifiers are made in various forms, all operating on the principle that current passes through them freely in one direction but only slightly or not at all in the designs. "The IRS254x series of high-voltage buck control ICs, adapts and compensates to LED parameter variations to enable a design that is highly accurate and inherently stable," said Stephane Ernoux, product manager for IR's lighting products. The new ICs deliver a micro-power startup of less than 500 micro amps for extremely low losses at turn-on and a deadtime of 140ns for continuous current regulation. Other features include auto restart, non-latched shutdown and PWM (Pulse Width Modulation) A modulation technique that generates variable-width pulses to represent the amplitude of an analog input signal. Like its fixed-width pulse density modulation (PDM) cousin, the output switching transistor is on more of the time for a dimmable capability, incorporated into a compact 8-pin DIP or 8-pin SOIC (Small Outline IC) A small-dimension, plastic, rectangular, surface mount chip package that uses gull-wing pins extending outward. See gull-wing lead, SOJ and chip package. package, also available in tape and reel. These ICs utilize IR's advanced high-voltage IC process which incorporates latest-generation high-voltage level-shifting and termination technology to deliver superior electrical over-stress protection and higher field reliability, in addition to other new features and enhancements. Data sheets for the devices are available on the Web at http://www.irf.com/whats-new/nr061005.html. Availability and Pricing All in 10,000 unit quantities, pricing begins at US $0.81 each for the IRS2540PbF and IRS2540SPbF and $0.83 for the IRS2540STRPbF. Pricing for the IRS2541PbF and IRS2541SPbF begins at $US0.89 and $0.91 for the IRS2541STRPbF. Production orders are available immediately. The devices are RoHS compliant. Prices are subject to change. About International Rectifier International Rectifier (NYSE:IRF) is a world leader in power management technology. IR's analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste from motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft and defense systems rely on IR's power management benchmarks to power their next generation products. For more information, go to www.irf.com. Trademark Notice IR[R] is a registered trademark of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders. |
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