App note: Consideration of self pollution reduction for electronic systems

App note from ON Semiconductors on EMI self pollution. Link here (PDF) This application note will address the problem of Electro Magnetic Interference (EMI) self pollution in which one part of an electrical systems such as cell phones and consumer electrical products emit radiation that interferes with the operation of other parts of the system.

App note: 1 kV SenseFET integrated power switch

App note from ON Semiconductors on their FSL4110LR power switch for SMPS power supplies. Link here (PDF) Some industrial equipment that are supplied from a threephase AC power source such as industrial drives and energy meters often need an auxiliary power supply stage that can provide a regulated low-power DC source for analog and digital […]

App note: Programmable analog functions

Another app note from ON Semiconductors about various digital potentiometers application. Link here (PDF) Analog circuits are made programmable by using digital potentiometers (POTs) to vary the key circuit parameters. This application note provides the analog design engineer with basic reference designs and circuit ideas for controlling the key parameters of analog circuits using digital […]

App note: Digital potentiometer (POT) to control LED brightness

Controlling LED brightness through digital potentiometer and a LED driver from ON Semiconductor. Link here (PDF) Light-emitting diodes (LEDs) require a regulated current, and their brightness is proportional to the current that flows through them. Some LED drivers use an external resistor to set the LED current. A digital POT can replace a discrete resistor […]

App note: High density serial flash addressing

Old app note from Macronix about accessing high density serial flash. Link here (PDF) Many consumer products have converted or are converting from parallel flash to SPI serial flash. Generally, high end applications require higher memory density, but in the past, serial flash densities were limited to 128Mb due to addressing constraints.

App note: USB On-The-Go (OTG) basics

USB OTG explained in this app note from Cypress Semiconductors. Link here This application note discusses several aspects of OTG functionality. The note introduces end-applications and different types of cables and connectors involved with OTG. It also describes the OTG protocol state changes when both Mini-A and Mini-B devices are connected .The host negotiation protocol […]

App note: Meeting transient specifications for electrical systems in military vehicles

Hardened circuit protection against voltage spikes and surges tackled in this app note from Vicor. Link here (PDF) Electrical systems in military vehicles are normally required to meet stringent transient requirements. Typical of these specifications is the MIL-STD-1275B. Although the specified levels of these surges and spikes are outside the capability of Vicors Maxi, Mini, […]

App note: Intelligent lighting controller measures ambient light and tracks time

Implementation on ambient light and time tracking luminaires controller from MAXIM Integrated, Link here This reference design explains how to design an intelligent lighting controller that senses and measures the ambient light level with an ambient light sensor (ALS). Equipped with a real-time clock (RTC), the controller also knows when to turn lighting on or […]

App note: Selecting the right CMOS analog switch

App note from MAXIM Integrated digging on the basics of CMOS analog switches and the latest improvement on them from the standard one. Link here Integrated analog switches often form the interface between analog signals and a digital controller. With the large number of analog switches on the market today, there are many performance criteria […]

App note: Gate-source voltage behaviour in a bridge configuration

App note from ROHM semiconductor on MOSFETS and IGBTs. Link here (PDF) Power switching devices such as MOSFETs and IGBTs are used for various kinds of power supply applications, power supply line switching components, and other power applications. In addition, the circuit topologies used are diverse, parallel and series connections are widely used, not to […]

App note: Board level application notes for DFN and QFN packages

Board mounting an DFN/QFN (Dual/Quad Flat-Pack No lead) application note from ON Semiconductor. Link here (PDF) The DFN/QFN platform offers a versatility which allows either a single or multiple semiconductor devices to be connected together within a leadless package. These guidelines include printed circuit board mounting pads, solder mask and stencil pattern and assembly process […]

App note: Why honest weigh scales are application specific

App note from Maxim Integrated discussing strain gauge and accompanying circuit are used in today’s weight measurement applications. Link here (PDF) Current laws and regulations require honesty, tolerance, and accuracy in weigh scales. The most commonly used weight-measurement element is the strain gauge. This application note explains how strain gauges are useful in multiple applications […]

App note: How to shrink your USB Type-C battery charger

Maxim’s app note on a highly compact Type-C charger solution. Link here (PDF) A highly integrated solution, as seen with the MAX77860 USB Type-C 3A switch-mode charger, dramatically reduces system complexity by integrating the charger, the power path, the Safeout LDO, ADC, and the USB-C CC and BC 1.2 detection in a small 3.9mm x […]

App note: Magnetometer placement in mobile devices

App note from Kionix about magnetometer integration challenges from the mobile equipment point of view, and gives guidelines for the mounting position of the magnetic sensor. 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 […]

App note: Using two tri-axis accelerometers for rotational measurements

App note from Kionix on utilizing 2 linear accelerometers to determine angular rotational rates. Link here (PDF) In many applications, customers would like to measure rotational motions (angular velocity, angular acceleration) in addition to linear motions. Most often, gyroscopes are added to their end product to obtain the rotational information. In some instances, customers already […]

App note: Light quality – White light parameters

App note from OSRAM on consistency of colors specifically white lights. Link here (PDF) White light is not the same as white light. When different light sources are used, color differences may become visible. To understand why this can happen, it is necessary to understand how people perceive color and light. Nevertheless, it is possible […]

App note: Ambient lighting design utilizing RGB LEDs

App note from OSRAM on using RGB LEDs or their MULTILED® for automotive interior lighting. Link here (PDF) This application note describes the advantages and challenges of utilizing RGB LEDs for ambient lighting control. Besides pointing out practical challenges, preferred solutions for RGB LEDs are outlined and discussed to assist customers with engineering design solutions.

App note: Color sensing improves look and feel of smart products

Renesas’ white paper on applications of RGB sensors. Link here (PDF) Color printers also require an accurate sensor to ensure that during calibration and printing the correct amount of ink is being deposited onto the paper—an essential requirement when the target output is for color photographs.

App note: Eye safety for proximity sensing using infrared light-emitting diodes

A guide to human eye safety for designers of consumer products, app note from Renesas. Link here (PDF) Active Proximity Sensing for Consumer products requires the use of a light-emitting component to illuminate the target object to be detected at some distance from the sensor. Typically, product designers do not want the illumination to interfere […]

App note: Basics on decoupling

See AVX technical note on how capacitors filter out transients in high speed digital circuits. Link here (PDF) This paper discusses the characteristics of multilayer ceramic capacitors in decoupling applications and compares their performance with other types of decoupling capacitors. A special high-frequency test circuit is described and the results obtained using various types of […]