App note: Vishay load dump TVS series for 24 V powertrains

App note from Vishay on the changes to the load dump test condition and defines the maximum surge suppressing capability for Vishay load dump TVS series in these conditions. Link here (PDF) As more trucks and buses are built with complex electrical systems, load dump protection is becoming an important safety feature for vehicles with […]

App note: Voltage proof test for metalized film capacitors

App note from Vishay about self recovery of metalized film caps. Link here (PDF) Voltage proof tests, also called “high pot” tests, are used to check if a capacitor has a breakdown failure mode occurring at a certain test voltage. The detection of breakdown is done by a current detection, specified if exceeding a certain […]

App note: Pulse load handling for fixed linear resistors

Technical note from Vishay about linear resistor handling pulsed currents. Link here (PDF) The power and thermal behavior of fixed linear resistors are mostly based on DC or RMS loads, but pulse loads, like single energy pulse or a continuous flow of pulses, become more and more an important factor in professional electronics.

App note: Pulse capabilities for thick film power resistors

Another app note from Vishay on their thick film power resistors on pulsed application. Link here (PDF) Vishay Sfernice offers a wide range of thick film power resistors. Our resistors are able to dissipate from 5 W up to 1100 W with a large range of ohmic values (10 mOhm up to 1 MOhm). The […]

App note: How to Use an SiC Diode in a PFC Circuit

App note from Vishay on using the SiC’s diode no switching loss on PFC circuit. Link here (PDF) An SiC diode is the optimal choice for power factor correction (PFC) in continuous conduction mode (CCM) because its particular reverse recovery characteristics reduce switching losses to almost zero. The selection criteria for an SiC diode are […]

App note: Optocouplers in on-board chargers and battery monitoring systems

App note from Vishay on how optocouplers play a role on safety for Electric vehicles. Link here (PDF) The number of electric vehicles on the roads is steadily growing, increasing the need for safe and reliable battery systems and high efficiency battery chargers. Modern electric vehicles use battery systems with voltages up to 1000 V […]

App note: Processing instructions for mounting of through-hole LEDs

Do and don’ts when mounting through-holes LEDs, app note from Vishay. Link here (PDF) Through-hole LED cases usually consist of epoxy casting compounds with duroplastic properties. It is in the nature of things that optical semiconductor devices require transparent materials with the best possible optical features. Unlike standard IC mold compounds, which use reinforcing fillers […]

App note: Calculating and interpreting power dissipation for polypropylene film DC-link capacitors

Tech note from Vishay on polypropylene film capacitor value calculation with temperature and power dissipation consideration. Link here (PDF) Film capacitors can deliver high power density due to their low ESR and high ripple current capabilities, and offer the highest ampere per μF ratio of capacitor technologies. This feature, combined with their high reliability and […]

App note: Integrated supercapacitor charger

Application circuit of supercapacitor ENYCAP(TM) power management from Vishay. Link here (PDF) The MAL219699001E3 demonstration circuit is a fully transparent power management solution with a regulated 2 W output and integrated power backup. It provides a DC/DC regulator with a wide power input range from 4.0 V to 20 V and adjustable regulated output between […]

App note: DC-to-DC design guide

DC-DC converter design guide from Vishay. Link here (PDF) Manufacturers of electronic systems that require power conversion are faced with the need for higher-density dc-to-dc converters that perform more efficiently, within a smaller footprint, and at lower cost despite increasing output loads. To meet these demands, Siliconix has combined advanced TrenchFET and PWM-optimized process technologies, […]

App note: Torque recommendations for TO-220 devices

App note from Vishay on the impact of torque on thermal resistance of TO-220 devices. Link here (PDF) When the TO-220 was first introduced, most applications required something less than the full power handling capabilities of this package. Hence, the TO-220 is almost taken for granted in terms of its excellent power handling capacity and […]

App note: Low ESR tantalum capacitors make a difference in circuit designs

App note from Vishay about how ESR in tatalum capacitors affect circuit performance. Link here (PDF) When choosing a capacitor for any application, there are a few key characteristics that must be understood in order to analyze its suitability for the circuit. In a simple capacitor equivalent circuit model, there are three key characteristics that […]

App note: The benefit of using a three sense pin design on battery

App note from Vishay about correcting error when reading current on small valued shunt resistor using third pin. Link here (PDF) The low values of battery shunts being produced today necessitate the use of precision analog to digital converters (ADCs) to interpret the voltage drop across the shunt’s element. Many of these precision ADCs require […]

App note: FPGA power supply considerations

App note from Vishay Siliconix, giving us tips on powering FPGAs. Link here (PDF) An FPGA is a device that offers many logic elements – up to 1 million gates in a single device at this writing – as well as other functionality such as transceivers, PLLs, and MAC units for complex processing. FPGAs are […]

App note: MELF resistors – The world’s most reliable and predictable, high-performing film resistors

App note from Vishay on why MELF resistors are so successful and has no alternative in today’s application. Link here (PDF) For more than 25 years, Vishay’s MELF resistors have successfully met the demanding requirements of the automotive industry. They offer superior SMD resistor performance in terms of accuracy, stability, reliability, and pulse load capability. […]

App note: Increasing accuracy in feedback circuits and voltage dividers with thin film chip resistor arrays

App note from Vishay on using chip resistors to achieve long-term stability. Link here (PDF) Thin film chip resistor arrays consist of several resistors of equal or different values combined in one package. During the manufacturing processes and the device’s lifecycle, all the particular resistors virtually experience identical conditions, which allow the specification of their […]

App note: Custom magnetics – What are they and when do you need them?

Consideration factors before going to custom magnetic request from manufacturer, an app note from Vishay. Link here (PDF) There are many manufacturers that claim they build custom magnetics. However, there is often confusion as to what constitutes custom magnetics and whether or not a designer actually needs them or can afford them. This article will […]

App note: How to avoid chipLEDs sticking to cover tape during automated tape-and-reel assembly

Investigative app note from Vishay on preventing too light components from sticking on the cover tape of their reel. Link here (PDF) Customers have informed Vishay that 0603 LEDs (ChipLEDs) supplied in tape and reel format sometimes stick to the PSA cover tape that is peeled off from the carrier tape during the assembly process. […]

App note: AC ripple current calculations solid tantalum capacitors

Application note from Vishay on power and voltage limitations of solid tantalum capacitors for both low and high frequency applications. Link here (PDF) Solid tantalum capacitors are preferred for filtering applications in small power supplies and DC/DC converters in a broad range of military, industrial and commercial systems including computers, telecommunications, instruments and controls and […]

App note: Power management solution – Constant Voltage (CV) pulse charging of hybrid capacitors

App note from Vishay about constant voltage (CV) pulse charging as the most cost-efficient solution to use on Hyrid capacitors. Link here (PDF) Rechargeable energy storage solutions are of high interest because of their flexibility, low maintenance requirements, and reduced cost over their life-cycle. For compact applications, classic electrolytic capacitors are environmentally friendly alternatives and […]