International Rectifier Introduces uPFC IC That Simplifies High Density Designs from 75W to 4kW; New Compact Power Factor Correction IC Cuts Control Board Size in Half.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 IR1150 family of uPFC(tm) (microPFC) for AC-DC power factor correction Power factor correction (PFC) is a technique of counteracting the undesirable effects of electric loads that create a power factor that is less than 1. Power factor correction may be applied either by an electrical power transmission utility to improve the stability and efficiency (PFC PFC abbr. private first class Noun 1. PFC - a powerful greenhouse gas emitted during the production of aluminum perfluorocarbon ) circuits. The compact SO-8-packaged device cuts PFC control board space in half, and enables a simplified and flexible high density solution for computing, consumer electronics and home appliances from 75W to 4kW. IR's new One Cycle Control (OCC OCC See: Options Clearing Corporation OCC See Options Clearing Corporation (OCC). ) approach in the IR1150 delivers the performance of continuous conduction mode (CCM CCM Contemporary Christian Music CCM Critical Care Medicine CCM County College of Morris (New Jersey) CCM Chama Cha Mapinduzi (political party, Tanzania) CCM CORBA Component Model ) PFC with the simplicity, reliability and low component count of a discontinuous current mode (DCM) circuit for PFC applications. Power factor (PF) is the relationship between AC voltage and current waveforms and is a measure of "power quality" that affects the efficiency of electrical transmission networks. With unity PF as the ultimate goal, the IR1150 enables 0.999 PF with only 4% total harmonic distortion The total harmonic distortion, or THD, of a signal is a measurement of the harmonic distortion present and is defined as the ratio of the sum of the powers of all harmonic components to the power of the fundamental. , enabling AC-DC applications to conform to international legislative requirements. "High performance, high power density solutions in AC-DC SMPS SMPS Society for Marketing Professional Services SMPS Switching Mode Power Supply SMPS Switched Mode Power Supply circuits are needed for the 'Digital Future' in home, commerce and industry. The patented one-cycle control technique radically alters traditional thinking about PFC solutions. It's a form of CCM PFC using a new 'integrator with reset' control block. This simplifies and reduces the size and component count for the PFC control circuit, making it a smart solution for a global range of computing, home entertainment and many other products," said Stephen Oliver, Marketing Manager for AC-DC Products at International Rectifier. Technical Highlights The One Cycle Control method used in the IR1150 controller does not have an analog multiplier, input voltage sensing, or fixed oscillator oscillator Mechanical or electronic device that produces a back-and-forth periodic motion. A pendulum is a simple mechanical oscillator that swings with a constant amplitude, requiring the addition of energy at each swing only to compensate for the energy lost because of air ramp, simplifying circuitry and reducing component count. Instead, IR's OCC uses a proprietary integrator with a reset circuit: The output of the error amplifier is integrated over each clock cycle to generate a variable-slope ramp. This variable ramp is compared with the error voltage and subtracted from the current sense signal to generate the PWM gate drive. Traditionally, Continuous Conduction Mode PFC offers high performance for high power applications above 250W. However, solutions using multiplier techniques are complex and require many design stages and a high component count, making CCM solutions very expensive and not appropriate for low power, price sensitive applications like laptop power adapters. In low power applications from 75W to 250W, Discontinuous Current Mode systems are used for their simplicity and low system cost. However, as system power increases to 100W and above, DCM systems can be very large (low power density) due to high peak currents and EMI filter requirements. For example, in a typical high power system such as a 1kW server SMPS, IR's solution has 40% fewer resistors and capacitors, halves the number of current transformers used and saves 50% of the PFC control PCB PCB: see polychlorinated biphenyl. PCB 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. area compared to traditional multiplier-based CCM systems. In lower power applications where power density is critical, such as high power laptop and LCD TV adapters, an IR1150 controller in CCM mode means reduced peak currents and a 43% reduction in EMI filter needs. This translates into a 16% reduction in PCB space and an increase in power density of 10% for a 120W system. In addition, a dedicated Over Voltage Protection pin offers greater protection for high power systems and the IC includes features such as enable- and micro-power start-up and "sleep mode" for compliance with energy efficiency standards such as 1W standby, Blue Angel and Energy Star. The IR1150 is an elegant solution to PFC legislation such as IEC 1000-3-2 in Europe, JIC C 61000-3-2 in Japan and the China Compulsory Certificate The China Compulsory Certificate mark, commonly known as CCC Mark, is a compulsory safety mark for many products sold on the Chinese market. It became effective on May 1, 2002. (CCC CCC A very speculative grade assigned to a debt obligation by a rating agency. Such a rating indicates default or considerable doubt that interest will be paid or principal repaid. Also called Caa. ) for products using more than 75W. As manufacturers implement PFC in response to these energy standards, the IR1150 control IC simplifies effective PFC solutions, and enables a single design that can be used worldwide. Go to the International Rectifier Web site for data sheets and information on the IR1150 demonstration board. IR1150S (consumer) and IR1150IS (industrial): http://www.irf.com/product-info/datasheets/data/ir1150.pdf Demonstration board, part number IRAC IRAC Infrared Array Camera IRAC Interdepartment Radio Advisory Committee IRAC Issue, Rule, Application, Conclusion (legal writing) IRAC Indochina Refugee Action Center IRAC Interim Rapid Action Change 1150-300W: http://www.irf.com/technical-info/refdesigns/irac1150-300w.pdf Availability and Pricing The devices in the IR1150 family are available immediately. Pricing is US $1.05 each for the IR1150S and US $1.38 each for the IR1150IS, all in 10,000-unit quantities. Pricing is 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), HEXFET HEXFET Hexagonal Field Effect Transistor (r) and uPFC(tm) are registered trademarks or trademarks of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders. |
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