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Archive for the ‘app notes’ Category

App note: EPIC: Electro-Pyrotechnic Initiator Chip Resistor

Sunday, December 4th, 2016

An application note on Vishay's electro-pyrotechnic resistor chip made from thin film technology. Link here (PDF) In this paper we will show how the EPIC’s thin film construction is unique in providing pyrotechnic engineers with outstanding performances in terms of firing energy, firing time, reproducibility and reliability, easy set up,...

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App note: Noise analysis for high-speed op amps

Sunday, December 4th, 2016

An application report on op-amp noise analysis from Texas Instruments. Link here (PDF) As system bandwidths have increased, an accurate estimate of the noise contribution for each element in the signal channel has become increasingly important. Many designers are not, however, particularly comfortable with the calculations required to predict the...

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App note: Infrared remote control implementation with MSP430FR4xx

Sunday, December 4th, 2016

Infrared remote control implementation with MSP430FR4xx application note from TI: This application report provides an insight into several of the most frequently used infrared protocols and especially their flexible implementation using the TI MSP430FR4xx series of low-power microcontrollers. The MSP430FR4xx microcontrollers are primarily targeted at remote control application that are...

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App note: TPS25810 Charging Port Over USB Type-C™

Sunday, November 27th, 2016

Allow more current from USB Type-C port, an application note from Texas Instruments utilizing TPS25810 and TPS2544 USB port manager. Link here (PDF) The TPS25810 is a USB Type-C downstream facing port (DFP) controller that monitors the USB TypeC™ configuration channel (CC) lines to determine when a USB device is...

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App note: bq77905 20S cell stacking configuration

Sunday, November 27th, 2016

Application note from Texas Instruments on their bq77905 ultralow power stackable battery protector. Link here (PDF) The bq77905 is a 3-5S Low Power Protector with easy stacking capabilities for higher than 5S cell battery packs. This document provides an example for setting up a stacking configuration with the bq77905 and...

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App note: Universal motor drive with PIC16 microcontrollers

Sunday, November 27th, 2016

An open-loop speed control TRIAC-driven universal motor driver board design from Microchip, app note here: This application note presents the design of an open-loop speed control TRIAC-driven universal motor driver board using a variety of core independent peripherals on an 8-bit microcontroller. The complete source code and reference design material...

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App note: Sensorless speed stabilizer for a DC motor

Sunday, November 20th, 2016

Precision Microdrives' sensorless speed sense by exploiting speed dependent back EMF voltage. Link here Motor speed is a parameter of a DC motor that is often measured and controlled, usually through additional sensors and with closed loop feedback. This method of speed control requires some form of speed sensor, normally...

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App note: Lifetime of DC vibration motors (MTTF & FIT)

Sunday, November 20th, 2016

DC vibration motors failure analysis by Precision Microdrives. Link here Reliability is an important consideration for engineers and product designers. It is also very context specific. For example consider a car, which is made from lots of individual components. If the radio antenna should fail, the car still operates. However...

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App note: Advantages of eFuses versus PTC resettable fuses

Sunday, November 13th, 2016

The advantage of eFuses an application note from ON Semiconductors. Link here (PDF) Overcurrent protection is a basic necessity for electrical devices. While many people are familiar with fuses and household circuit breakers, few are intimately familiar with the kinds of overcurrent protection devices that are found in electronics. Though...

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App note: LDC0851 quick-start guide

Sunday, November 13th, 2016

Texas Instrument's differential inductive switch LDC0851 application guide. Link here (PDF) Texas Instruments introduced the LDC1000 in 2012, the industry’s first inductance to digital converter. LDC1000 revolutionized the world of proximity sensing by delivering increased reliability, high resolution, and lower total system cost. The LDC1000 was soon followed by second...

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App note: Inductor performance in high frequency DC-DC converters

Sunday, November 6th, 2016

Coilcraft's application note on inductor performance or efficiency when used in high frequency applications. Link here (PDF) ESR vs frequency curves can be used to predict inductor losses in higher frequency converters, but careful consideration must be given to the wave shape (ripple current) of each application.

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App note: General design considerations for MEMS microphones

Sunday, November 6th, 2016

Proper mounting of miniaturized MEMS from Cirrus Logic application notes. Link here (PDF) This application note offers recommendations in mechanical, PCB land pattern, and solder paste stencil design to deliver the best microphone performance in the final application design.

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App note: Vibrating mesh nebulizer reference design

Sunday, November 6th, 2016

Vibrating mesh nebulizer reference design from Microchip, application here (PDF!) This application note demonstrates an implementation of driving a piezo mesh disk in a vibrating mesh nebulizer demo. The demo system features a Microchip 8-bit microcontroller-based piezo mesh disk driver board and a nebulizer plastic housing.

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App note: UHF RFID label antenna design

Saturday, November 5th, 2016

UHF label antenna design guide from NXP, app note here (PDF!) This document provides a general overview on basics of UHF wave propagation, as well as practical considerations of UHF label antenna design. The target is to guide the reader to a good understanding of UHF label antenna design in theory...

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App note: Hipot testing of magnetic components

Sunday, October 30th, 2016

High voltage test between two isolated coils for isolation handling an application note from Coilcraft. Link here (PDF) This application note discusses the purpose of hipot (high potential) testing and how the hipot test relates to inductor and transformer safety.

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App note: SOLERIQ® L38

Sunday, October 30th, 2016

OSRAM's filament looking LED application note. Link here (PDF) SOLERIQ® L38 (GW T3LxF1) is a filament LED with a beam angle of 360deg for indoor retrofit lighting applications. It combines the advantages of modern LED technology with the aesthetics of traditional light bulbs. The construction of the SOLERIQ® L38 consists...

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App note: Magnetometer placement in mobile devices

Sunday, October 23rd, 2016

Correct magnetometer placement app note from Kionix. Link here (PDF) Electronic devices contain many parts which can affect a magnetic sensor. When deciding the mounting position, it is necessary to consider the types of materials and the amount of current carried in proximity of the magnetic sensor. Accuracy of an...

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App note: Embedded orientation detection using the MMA8450Q

Sunday, October 23rd, 2016

NXP's accelerometer chip MMA8450Q, provides orientation detection on handheld devices. Link here (PDF) This application note targets the portrait/landscape orientation detection feature which has become standard in many hand-held electronic devices. Additionally, this application note aims to explain uses as well as highlight some of the challenges of designing an...

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App note: Practical considerations of Trench MOSFET stability when operating in linear mode

Saturday, October 22nd, 2016

Practical considerations of Trench MOSFET stability when operating in linear mode, application note (PDF!) from Fairchild Semiconductor This application note focuses on the factors affecting the thermal instability condition of a trench MOSFET device in Linear Mode. In particular, it studies the phenomenon when the drain current (Id) focusing process occurs...

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App note: Understanding linear resonant actuator characteristics

Sunday, October 16th, 2016

Application note about Linear Resonant Actuators from Precision Microdrives. Link here Linear Resonant Actuators (LRAs) are becoming more popular for haptic applications. They are an alternative to eccentric rotating mass vibration motors and have several distinct advantages. For example they have better haptic performance characteristics and are more efficient. For...

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