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Archive for the ‘app notes’ Category

App note: Operation evaluation of ultra low ON resistance MOSFET supporting quick charge for 1 cell Lithium ion battery protection

Sunday, January 15th, 2017

ON semiconductor's application note on faster charging of Lithium Ion batteries with consideration on heat suppression. Link here (PDF) Currently, because LiB (Lithium Ion Battery) is superior in current density and electromotive force, it becomes mainstream of batteries for mobiles such as smart phone. However, because LiB is weak at...

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App note: Application precautions: Power MOSFET application notes

Sunday, January 15th, 2017

Toshiba's application note on the things to consider when picking a power MOSFET. Link here (PDF) This document explains selecting MOSFETs and what we have to consider for designing MOSFET circuit, such as temperature characteristics, effects of wire inductance, parasitic oscillations, avalanche ruggedness, and snubber circuit.

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App note: Redefining a new state-of-the-art in microampere current-sense amplifiers

Sunday, January 8th, 2017

Silicon Lab's TS1100 and TS1101 current sense amplifier's features discussed in this app note. Link here (PDF) Sensing and controlling supply current flow are a fundamental requirement in most all electronic systems from battery-operated, portable equipment to mobile or fixed-platform power management and dc motor control. High-side current-sense amplifiers (or...

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App note: Multiple Capture/Compare/PWM (MCCP): Extending the functionality for low-cost motor control applications

Sunday, January 8th, 2017

Microchip's MCCP module on PIC32 devices demonstrate the built-in majority detection filter for simpler motor control drives. Link here (PDF) The motor control industry has been focusing on designing low-cost motor control drives for various applications. The consumer demand for low-cost motor control applications is driving this trend. Microchip has...

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App note: Add a “Black Box” fault logger to your “Big (or Small) Box” system

Sunday, January 1st, 2017

Application notes from Maxim Integrated on adding log functionalities in your system. Link here (PDF) This article describes how to add a "black box" functionality - nonvolatile fault logging - to networking, communications, industrial, and medical equipment. It outlines the benefits of recording fault data, including faster, more definitive failure...

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App note: Selecting current sensors and transformers

Sunday, January 1st, 2017

Selection guidelines from Coilcraft. Link here (PDF) Current sensors detect the flow of AC or DC current in a wire or circuit trace. They can be used to detect an on/off/ pulse current condition or to measure the magnitude of the current in the wire or trace. This discussion is...

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App note: Bluetooth low energy digital pedometer demo design

Saturday, December 31st, 2016

An application note (PDF!) from Microchip: A Bluetooth low energy digital pedometer demo design A digital pedometer is a portable electronic device that counts each step a person takes by detecting the motion of the person's body with an accelerometer. This application note demonstrates the implementation of a Bluetooth Low Energy Digital...

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App note: IR remote control transmitter

Saturday, December 31st, 2016

IR remote control transmitter application note (PDF!) from Microchip: This application note illustrates the use of the PIC10F206 to implement a two-button infrared remote controller. The PIC10F2XX family of microcontrollers is currently the smallest in the world, and their compact sizes and low cost make them preferable for small applications...

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App note: Solid state relays input resistor selection

Sunday, December 25th, 2016

SSR or solid state relays input resistor recommendation app note from Vishay. Link here (PDF) Solid state relays (SSRs) are commonly driven by TTL or buffered CMOS logic gates. These gates, when used to sink current, provide adequate drive for SSRs. An open-collector output is not required to drive the...

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App note: The heat is on – High-power surface-mount resistors

Sunday, December 25th, 2016

Application notes from Vishay on effective heat dissipation for their aluminum nitride utilized resistors. Link here (PDF) The intent is to discuss a few techniques to manage the heat that is generated by high-power surface-mount resistors and the effects they will have on design space, complexity, and cost.

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App note: Audible noise reduction techniques for FPS (Fairchild Power Switch) Applications

Sunday, December 18th, 2016

Reducing audible noise in switch mode power supplies app note from ON Semiconductors. Link here (PDF) In general, switched mode power supplies do not generate audible noise when they operate at constant ultrasonic frequencies (>20kHz). However, some switched mode power supplies can produce audible noise at certain load conditions. Most...

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App note: Applications of zero voltage crossing optically isolated triac drivers

Sunday, December 18th, 2016

App note from Fairchild Semiconductors about their zero voltage crossing isolators. Link here (PDF) The zero-cross family of optically isolated triac drivers is an inexpensive, simple and effective solution for interface applications between low current dc control circuits such as logic gates and microprocessors and ac power loads (120, 240...

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App note: Using the Configurable Logic Cell (CLC) to interface a PIC16F1509 and WS2811 LED driver

Saturday, December 17th, 2016

An application note (PDF!) from Microchip on how to use CLC to interface a PIC16F1509 and WS2811 LED driver: The Configurable Logic Cell (CLC) peripheral in the PIC16F1509 device is a powerful way to create custom interfaces that would otherwise be very difficult. One example is the single-wire PWM signal, used by the...

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App note: Transponder coils in an RFID system

Sunday, December 11th, 2016

A short application note from Coilcraft about transponder coils. Link here (PDF) Radio Frequency Identification (RFID) is the system of using radio signals to send information identifying a particular situation or item. It can be used to track and locate any item including material, people and animals. The RFID transponder...

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App note: Signal transformer application and specification

Sunday, December 11th, 2016

Application note from Coilcraft discussing the wideband transformer and the autotransformer. Link here (PDF) In the simplest sense, a transformer is two or more windings coupled by a common magnetic field. This magnetic field provides the means to pass voltages and currents from one winding (primary) to the other winding...

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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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