IR's New Versatile PWM Control IC Addresses Synchronous Buck Applications with Wide Input Voltage Range from 12V to 75V and Boosts Efficiency.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 the IR3651, a synchronous 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 control IC designed for high performance synchronous DC-DC DC-DC Direct Current to Direct Current (power conversion) buck applications with an input voltage range up to 75V. With programmable switching frequency up to 400kHz, the IR3651 is ideal for a wide range of applications including telecom and base-station power supplies, networking servers, automotive and industrial control. "The IR3651, with a pair of IR's DirectFET[R] MOSFETs, can achieve greater than 88% system efficiency at 48Vin and 3.3Vout at 6A without a heatsink or airflow," said Rami rami [L.] plural of ramus. rami communicantes bundles of nerve fibers connecting a sympathetic ganglion to spinal nerve; categorized as gray rami (unmyelinated postganglionic fibers) or white rami (myelinated preganglionic Hamze, senior marketing manager for IR's DC-DC Computing Products. "Another advantage compared to similar devices on the market is IR3651's higher maximum input voltage rating, enabling a more robust and reliable design," he added. The IR3651 is designed to drive a pair of external N-channel MOSFETs up to 25A. Protection features such as programmable soft-start, hiccup hiccup or hiccough, involuntary spasmodic contraction of the diaphragm followed by a sharp intake of air, which is abruptly stopped by a sudden, involuntary closing of the glottis (opening between the vocal cords); the consequent blocking of air current limit and under-voltage lockout lockout, intentional closing up of a company, factory, or shop by an employer to prevent employees from working during a strike or labor dispute. The term lockout are provided for required system-level reliability in the event of a fault condition. The device also offers synchronization which allows simplified system-level EMI (ElectroMagnetic Interference) An electrical disturbance in a system due to natural phenomena, low-frequency waves from electromechanical devices or high-frequency waves (RFI) from chips and other electronic devices. Allowable limits are governed by the FCC. filter design. The new controller includes a 150V half-bridge driver that allows for considerable design flexibility. For instance, the device may be used in low power (less than 60W) non-isolated DC-DC converters for network equipment as well as high power (greater than 200W) pre-regulator stages in regulated isolated converters. As a result, the IR3651 can be applied to designs for 36V inkjet printers, 28V aerospace applications, 24V electric bicycles, 72V battery systems, 18V wall bricks, 12V secondary-side post regulators and general purpose high-voltage, non-isolated DC/DC converters. Data sheets, online design tools, and demonstration board information are posted on-line. For more information, go to http://www.irf.com/whats-new/nr070208.html. Availability and Pricing The IR3651 is available immediately. Pricing is US $2.00 each in 10,000-unit quantities. Prices are subject to change. The devices are lead-free and are compliant with the Restriction of Hazardous Substances Directive The Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment 2002/95/EC[1] (commonly referred to as the Restriction of Hazardous Substances Directive or RoHS (RoHS). 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. Patent and Trademark Notice IR's proprietary DirectFET technology is covered by US Patents 6624522, 6784540 and multiple other US and foreign pending patent applications. DirectFET([R]) and IR([R]) are trademarks of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders. |
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