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Posts Tagged ‘app note’

App note: Snubber capacitors for complete insurance of power semiconductors

Sunday, August 28th, 2016

An application note from WIMA about snubber capacitors, Link here. The trend of modern semiconductor technology towards increasingly powerful applications results in the fact that switched currents and voltage levels are continuously increased and that simultaneously the switching speed is also increasing markedly. The developments in the area of power...

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App note: Selection of capacitors for pulse applications

Sunday, August 28th, 2016

Guidelines from WIMA about selecting capactiors for pulsed conditions. Link here The maximum permissible AC voltage that can be applied to capacitors in sinusoidal waveform applications, can be determined from the graphs in the respective capacitor ranges. However, where pulse conditions exists, the following procedure is to be observed to...

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App note: Measuring a loudspeaker impedance profile using the AD5933

Sunday, August 21st, 2016

An application note from Analog Devices about AD5933, this provides a low cost substitute to expensive test equipment like signal generators, oscilloscope and voltmeters in getting the speaker's impedance profile. Link here (PDF) This application note describes a circuit architecture using the AD5933 that allows the system designer to measure...

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App note: Choosing the appropriate component from data sheet ratings & characteristics.

Sunday, August 21st, 2016

Chossing the right power semiconductor for an application, a technical note from IXYS. Link here This application note is intended to show how to choose the appropriate rating of a power semiconductor component for a known application using the specifications given in the datasheet. The explanations have been kept sufficiently...

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App note: Voltage to current conversion

Sunday, August 14th, 2016

Using Apex Microtechnology's power op amps for voltage controlled current sources (VCCS's) application note, Link here (PDF) Voltage controlled current sources (or VCCS’s) can be useful for applications such as active loads for use in component testing or torque control for motors. Torque control is simplified since torque is a...

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App note: Programmable power supplies

Sunday, August 14th, 2016

Apex Microtechnology's application note about programmable power supplies. Link here (PDF) The programmable power supply (PPS) is not only a key element in automated test equipment, but it is also used in fields as diverse as industrial controls, scientific research and vehicular controls. When coupled to a computer, it bridges...

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App note: Wear leveling in NAND flash memory

Sunday, August 7th, 2016

Application note/Technical note from Macronix on extending the maximum endurance limit of NAND flash memories by wear leveling. Link here (PDF) NAND flash memory is widely used in today’s embedded systems for code and data storage applications. Some applications are required to perform numerous Program and Erase operations on the...

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App note: Understanding a digital transistor datasheet

Sunday, August 7th, 2016

Application note from ON Semiconductors about digital transistors where two resistors are built-in the transistor package. Link here (PDF) This application note will describe the common specifications of a Digital Transistor. It will also show how to use these specifications to successfully design with a Digital Transistor.

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App note: Solid state relay parallel and DC operation

Sunday, July 31st, 2016

Parallel two solid state relays for improved current handling and avoiding imbalance of load distribution are discussed in this an app note from Vishay. Link here (PDF) Vishay solid state relay (SSR) outputs can be wired in parallel enabling the user to benefit from lower on-resistance and higher load currents...

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App note: Solid-State Relays

Sunday, July 31st, 2016

Solid-state relays introduction from Vishay, Link here (PDF) MOSFET SSRs feature an optocoupler construction, but have a pair of MOSFETs on the output instead of a phototransistor. A pair of source-coupled MOSFETs emulate an electromechanical relay by providing bidirectional switch capability and a linear contact. No output power supply is...

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App note: Flow sensing in tankless water heaters

Sunday, July 24th, 2016

Contactless reed switches from Littelfuse provides flow and water presence monitoring. Link here (PDF) Reed switches and sensors are highly effective solutions for flow sensing applications that can be used for detecting the presence of fluid flow in a system or even measure the rate of fluid flow. Tankless water...

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App note: Circuit protection technology application matrix application guide

Sunday, July 24th, 2016

Here's an application matrix of Littelfuse's circuit protections, Link here (PDF)

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App note: Parallel configuration of H-bridges featuring the MC33932 and MC34932 ICs

Sunday, July 17th, 2016

Old application note from ON Semiconductors on getting increased power capability by paralleling H-bridges and overcoming current limit imbalance between the two drivers by properly designing the board layout. Link here (PDF) Two or more H-bridges can be operated in parallel to increase the current handling capacity of the circuit....

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App note: Duty cycle and power optimization

Sunday, July 17th, 2016

Power saving specially on battery operated devices need to be kept, in this application note from ON Semiconductors discussed how to keep duty cycle in which a wireless RF device is operated at a minimum time. Link here (PDF) Consider a battery powered device (target), which should receive data from...

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App note: Rectifiers for Power Factor Correction

Sunday, July 10th, 2016

Another Vishay's app note about power factor correction this time about the component used and their effects. Link here (PDF) PFC devices are generally selected base on the speed of their reverse recovery time (trr). Currently for CCM (Continuous-Conduction-Mode) and CRM (Critical Conduction-Mode) PFC devices in market, rectifiers up to...

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App note: Power factor correction with ultrafast diodes

Sunday, July 10th, 2016

Vishay's app note in keeping the power supplies' power factor in check with their ultrafast diodes. Link here (PDF) More and more switched mode power supplies (SMPS) are being designed with an active power factor correction (PFC) input stage. This is mainly due to the introduction of regulations aimed at...

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App note: Limiting inrush current

Sunday, July 3rd, 2016

Aimtec's app note on inrush current on power converters and their solution. Link here Inrush currents can be problematic in circuits that utilize overload protection devices such as fuses and circuit breakers. The selection of overcurrent protection devices is made more complicated when high inrush currents are present. False overload...

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App note: Forced air convection and heat sinking for power supplies

Sunday, July 3rd, 2016

Application note from Aimtec discusses about two ways for taking away heat on power supplies. Link here When evaluating the operating temperature ranges of power supplies one must consult component’s datasheets. Datasheets state a “usable” operating temperature range typically given at full output load. In order to reach the upper...

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App note: Method to reduce the output ripple & noise of power supplies

Sunday, June 26th, 2016

Another app note from Aimtec on power supplies and how to minimize their output noises. Link here The switching power supplies have the fundamental advantage of high efficiency i.e. low power dissipation when compared to linear voltage regulation. However, there exists an important consideration concerning the presence of ripple and...

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App note: The optimum method to test the output ripple & noise of power supplies

Sunday, June 26th, 2016

Application note from Aimtec about testing power supplies, Link here The switching power supplies have the fundamental advantage of high efficiency i.e. low power dissipation when compared to linear voltage regulation.

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