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- Large Municipal Utility Upgrades 10 Circuit-Switchers
- A large municipal utility customer in the Southwest realized that a majority of the Circuit-Switchers on their electrical system had been in service for 20 to 25 years. The time had come to investigate options available to ensure continued reliable service from these Circuit-Switchers. S&C performed an evaluation of the...
- Case studies
- Ultracapacitors: Why, How, and Where Is the Technology
- Electrical energy storage is required in many applications - telecommunication devices, such as cell phones and pagers, stand-by power systems, and electric/hybrid vehicles. For applications in which significant energy is needed in pulse form, traditional capacitors as used in electronic circuits cannot store enough energy in the volume and weight...
- White papers 2005-02-10
- Series Connection of Super Capacitors: Comparative Study of Solutions for the Active Equalization of the Voltages
- This paper presents the problematic of voltage sharing in a series connection of super capacitors. It is generally described the way the balancing of the voltages can be obtained, with the main design rule. It is also introduced how the voltage balancing can be obtained easier with a coherent arrangement...
- White papers 2002-09-06
- The Sigma-Delta Modulator for Measurement of the Thermal Characteristics of Capacitors
- The paper presents a simple and successful design of the sigma-delta modulator with flip-flop sensor for measurement of the thermal characteristics of the capacitors. The theoretical considerations are verified by a laboratory experiment. The flip-flop sensor is part of a class of silicon sensors with a digital output. A standard...
- White papers 2002-07-11
- Evaluation of Maxwell Technologies PC5 Ultracapacitor
- Ultracapacitors, also known as double-layer capacitors, incorporate new technology and material not used in other capacitors. The ultracapacitor stores electrostatic energy by polarizing the electrolytic solution and can be charged and discharged hundreds of thousands of times. An electrode-electrolyte interface with activated carbon fibers allows obtaining extremely high capacitance per...
- White papers 2001-08-22
- Power Smoothing and High Power Fast Energy Exchange Between Storage Systems
- Super capacitors are new components able to store a high energy density even if this energy is still lower than the energy batteries can store. This paper shows how super capacitors can be used to supply electric vehicle such as buses and tramways. The "on-board" super capacitors need a fast...
- White papers 2001-01-24
- Evaluation of MultiLayer Ceramic Capacitors for Low Voltage Type Failures
- The paper reveals about a series of tests that were performed on CKR 06 style multi-layer ceramic capacitors that were procured from two manufacturers, with two capacitance or voltage ratings for each. The capacitors were subjected to: Initial electricals consisting of capacitance, dissipation factor, and insulation resistance tests, 850 C...
- White papers 2000-10-20
- Recent Advances in Capacitor Technology With Application to High Frequency Power Electronics and Voltage Conversion
- This white paper informs about the High frequency switching regulators that need improved input capacitors to control common mode noise. It also tell about Electrolytic capacitors that remain essential for high current handling while electrostatic capacitors are still needed for fast response and to handle high ripple current. The adoption...
- White papers 2000-03-13
- Evaluation of SMT Polymer Film Capacitors Using Newly Developed, Low Shrinkage PET
- This white paper describes in detail about the advances in polymer film dielectric technology, coupled with a revolutionary processing system that has made possible high value and miniaturized electrostatic capacitors which compete favorably against ceramic and tantalum capacitors in many critical applications. It also gives an insight into thin polymer...
- White papers 2000-03-06
- Multilayer Polymer (MLP) Capacitors Provide Low ESR and Are Stable Over Wide Temperature and Voltage Ranges
- This white paper basically reveals about the proven capacitor technology which has been built upon the best of the manufacturing techniques of multilayer ceramic and stacked plastic film capacitors. It signifies the film capacitor reliability that can be found in chip and block shaped capacitors that approach the board space...
- White papers 2000-02-25
- Film Chip Capacitors Save Space in High Frequency Power Trains
- This white paper brings out information about the combination of the recent availability of ultra thin polymer dielectrics and advances in multilayer stacking and chip packaging methods that has allowed for the production of higher voltage plastic film-chip capacitors which are suitable for surface mounting. It also reveals that the...
- White papers 2000-02-25
- Board Flexure Comparison between Surface Mount Multi-Layer Ceramic and Film Capacitors
- This paper discusses about the Surface mount production techniques that are the standard in electronics manufacturing; components are now subjected to mechanical stresses during both assembly and use. Flexure or printed wiring board PWB bending is a significant source of these stresses that can lead to component breakage and failure....
- White papers 2000-01-25
- Requirement for Robust Capacitors in High Density Power Converters
- The white paper describes about the Power supply designers that are faced with complex component size and part shape issues in order to minimize circuit board land area and maximize cubic space efficiency. Chip capacitors are perhaps the most fragile components in the power system, being easily damaged by external...
- White papers 2000-01-25
Additional Resources
- Power Management IC promotes portable design flexibility
- Offering 4 output voltages in 3 x 3 mm MLF[R]-16 lead package, MIC2811/21 combines DC/DC converter with 3 LDO regulators is suited for providing voltages necessary for system core, I/O, auxiliary, and external memory supplies found in portable devices. Model MIC2811 supports optional bypass capacitor to optimize noise and PSRR...
- Articles 2008-06-25
- LED Driver features Quad-Mode™ fractional charge pump
- Suited for portable products, CAT3637 is able to drive up to 6 LEDs at 30 mA each, in 2 mA steps via simplified 1-wire EZDimTM interface control that supports 16 output power levels. Fourth charge pump mode of driver achieves 1.33x boost mode with 2 flying capacitors. Available in 3...
- Articles 2008-06-25
- Series gives drivers environmental challenge
- The American Le Mans Series designed its new Green Challenge -- a test of fuel efficiency to help the environment -- in part to put the automobile back in auto racing. Your automobile. "There was a time the technology trickled into street cars, but that came...
- Articles 2008-06-25
- Atmel Upgrades 4 Linear Regulator PMU Single Chip to 5V Input Supply
- AT73C237 Integrates 4 Linear Regulators in a 3mm x 3mm QFN Package ROUSSET, France, June 24 /PRNewswire-FirstCall/ -- AtmelR Corporation announced today the release of its AT73C237 Power Management Unit PMU compatible with a 5V input supply and generating four regulated output voltages, with programmable output...
- Articles 2008-06-24
- DC/DC Regulator operates from 3-36 V input supply
- Delivering up to 500 mA, Model LTM8021 [micro]ModuleTM regulates output voltage from 0.8-5 V that is adjusted with only one resistor. It includes dc/dc controller IC, power switch, on-board inductor, compensation circuitry, and I/O bypass capacitors. Available in 6.25 x 11.25 x 2.8 mm surface-mount LGA package, low profile and...
- Articles 2008-06-23
- KEMET Releases New MIL-PRF-123 Space-Level Ceramics
- Includes the only 1uF surface-mount MIL-PRF-123 capacitor on the market GREENVILLE, S.C., June 19 /PRNewswire-FirstCall/ -- KEMET Corporation announced today the introduction of four new first-to-market surface-mount SMD MIL-PRF-123 space-level ceramic capacitors. The new M123A13BXB105KZ (KEMET PN C2225Z105K5XAL) from KEMET is the only 50V 1uF...
- Articles 2008-06-19
- Stereo Codec is optimized for portable audio applications
- Available in 40-pin, 5 x 5x 0.55 mm QFN package for space-constrained applications, Model WM8903 features SmartDACTM low-power DAC capacitor switching architecture to enable DAC to headphone power consumption of just 4.4 mW and includes capability for programmable performance vs. power profiles, allowing system designers to optimize for each usage...
- Articles 2008-06-17
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