App note: Low Value Power Metal Strip Resistors – Intelligent Li-ion rechargeable battery

App note from Vishay about tight tolerances that sense resistor requires for accurate and efficient Li-ion battery chargers. Link here (PDF) Intelligent Li-ion rechargeable batteries utilize current sensing resistors with ultra low ohm, low TCR, tight tolerance, high withstanding surge current and low thermal EMF.

App note: Grid resistors: Determining nominal resistance

App note from Vishay on selecting grid resistors base on their application as resistors vary over continuous duty. Link here (PDF) Nearly all resistor materials change resistance as temperature increases. Depending on the material, this change can range from a few percent to 50 % and higher at 100 % duty on the resistor (100 […]

App note: Fast charging control with NTC temperature sensing

Vishay’s application note on fast charging control using NTC and TI’s BQ2005. Link here (PDF) The need for increased autonomy for new models of laptops and cellular phones has resulted in high-energy density power packs – Ni MH and Li-ion batteries. These batteries can be charged quickly, on the condition that the fast charging complies […]

App note: VSOP98260 for IR code learning applications

Application note from Vishay on their VSOP98260 IR learning chip which uses the same IR LED as transceiver. Link here (PDF) There is a wide interest in universal remote controls, which can be used to diminish the “clutter” of remote controls typically present in a modern living room setting. Training the universal remote to send […]

App note: Aluminum capacitors in power supplies

An engineering solutions from Vishay on aluminum capacitors used in power supplies, PDF link here. In general, aluminum capacitors are the most suitable capacitors for addressing requirements such as low and high frequency filtering and energy storage, which demand high capacitance values and power ratings. The devices offer high Cu/(unit cost) ratios, are small compared […]

App note: AC film capacitors in connection with the mains

Vishay application note on mains film capacitors. PDF link here. Because of the high energy availability and the severe environment of surge voltages and pulses, applications of capacitors in connection with the mains must be chosen carefully. Two kinds of connections and thus two kinds of applications can be distinguished. One is where the capacitor […]

App note: DC leakage failure mode in solid tantalum capacitor

An application note from Vishay on the causes of increased DC leakage current on solid chip tantalum capacitors. PDF link Here. This paper is submitted as an educational medium for use by anyone who has interest in solid tantalum chip capacitor performance.  It represents technical phenomena that are generic to all solid tantalum chip capacitors. […]

App note: Application of optical sensors – Reflective

The second type of optical sensor, here’s Vishay app note on how do they operate and their considerations when using one of these on your projects. These sensors integrate an infrared emitter and photo detector in a single package. The most common types of optical sensors are transmissive and reflective sensors. Both types detect the […]

App note: Application of optical sensors – Transmissive

Optical sensor basics and its considering factors of these type of contactless switches, learn more from Vishay’s app note on transmissive optical sensor. These sensors integrate an infrared emitter and photo detector in a single package. The most common types of optical sensors are transmissive and reflective sensors. Both types detect the presence of an […]