An App note from OSRAM on an Intelligent control circuitry example using a PIC Microcontroller. Link here (PDF) Nowadays, applications increasingly make use of LEDs as a replacement for traditional light bulbs. For example, LEDs are frequently used in the design of automobile tail lights, signal lights, traffic signals, and variable message signs. LEDs provide […]
Category Archives: app notes
App note: Package-related thermal resistance of LEDs
App note from OSRAM on thermal resistance for LEDs and IREDs (IR emitting diodes). Link here (PDF) In order to achieve the expected reliability, lifetime and optimal performance of LEDs, especially for high-power LEDs, appropriate thermal management is of the utmost importance. One of the key parameters for good thermal management is the temperature of […]
App note: Increasing accuracy in feedback circuits and voltage dividers with thin film chip resistor arrays
App note from Vishay on using chip resistors to achieve long-term stability. Link here (PDF) Thin film chip resistor arrays consist of several resistors of equal or different values combined in one package. During the manufacturing processes and the device’s lifecycle, all the particular resistors virtually experience identical conditions, which allow the specification of their […]
App note: Custom magnetics – What are they and when do you need them?
Consideration factors before going to custom magnetic request from manufacturer, an app note from Vishay. Link here (PDF) There are many manufacturers that claim they build custom magnetics. However, there is often confusion as to what constitutes custom magnetics and whether or not a designer actually needs them or can afford them. This article will […]
App note: Simplify home audio systems With the PCM9211 – A versatile audio interface transceiver
A digital interface PCM9211 from Texas Instruments app note. Link here (PDF) Large-screen HDTVs are selling in huge volumes over last few years, primarily driven by amazing improvements in picture quality & form factor (thinner screens). The form factor constraints from having skinny screens result in tiny built-in speakers that are undersized, under-powered and are […]
App note: Noise suppression for wireless headphones
Wireless headphone interference investigation from muRata. Link here Recently, the popularity of wireless headsets has been growing as the number of situations where people “play sports while listening to music” increases. Bluetooth is frequently used for communication between smartphones and headsets. However, audio can skip due to communication errors, so countermeasures are required. This is […]
App note: The Phytochrome system – Why use far-red?
App note from Würth Elektronik on why plants evolved to use far-red wavelengths and why it is essential for them. Link here (PDF) The light requirement of plants is now known to be far more complex than originally thought leading to the development of numerous LED technologies that produce a variety of different light spectra, […]
App note: CeraLink® Capacitors
Compact and high capacitance ceramic capacitors from TDK electronics. Link here (PDF) CeraLink is a family of very compact capacitors for stabilizing voltages in the DC link. They are therefore suitable for use as either snubber or DC link capacitors. These products are based on PLZT ceramics and are designed to provide engineers with compact […]
App note: Linear regulator specifications
Thorough items on a linear regulator datasheet provides valuable details about its proper usage discussed in this App note from ROHM semiconductor. Link here (PDF) A linear regulator data sheet includes a specifications table that lists output voltage values and precision. Besides, very important information such as maximum ratings, operating conditions and characteristic graphs are […]
App note: Connecting LDOs in parallel
App note from ROHM semiconductor on combining LDOs for higher load capacity. Link here (PDF) When you want to increase the output current capacity of an LDO, or when the power dissipation of a single LDO is insufficient, you might think of connecting LDOs in parallel if you need to disperse the dissipation using two […]
App note: Basics and low-cost solution proposals to move from legacy USB2.0 connector to USB Type-C™ connector with STM32 devices
App note from STMicroelectronics about interfacing STM32 legacy USB 2.0 to USB Type-C. Link here (PDF) This application note is a guideline to introduce this USB Type-C connector onto platform to replace legacy USB2.0 connectors. It introduces some basis of the two new standards USB Type-C™ and the USB Power Delivery.
App note: Quad-SPI (QSPI) interface on STM32 microcontrollers
Extend memories by using external high speed memories interfaced to Quad-SPI modules on STM32 micros, app note from STMicroelectronics. Link here (PDF) This application note describes the Quad-SPI interface on the STM32 microcontrollers and explains how to use the module to configure, program, and read external Quad-SPI memories. It describes some typical use cases to […]
App note: How to avoid chipLEDs sticking to cover tape during automated tape-and-reel assembly
Investigative app note from Vishay on preventing too light components from sticking on the cover tape of their reel. Link here (PDF) Vishay’s 0603 LEDs (ChipLEDs) are widely deployed across high-density consumer and industrial electronics. Due to their ultra-compact footprint, these components are frequently integrated into the indicator panels of high-uptime network servers. Contract manufacturers […]
App note: A simple alternative to analog isolation amplifiers
A linear isolation amplifier from Silicon Labs app note. Link here (PDF) Analog circuits sometimes require linear (analog) signal isolation for safety, signal level shifting, and/or ground loop elimination. Linear signal isolation is typically difficult to implement, costly, and often exhibits mediocre performance. While the design community thirsts for a flexible and inexpensive linear isolator […]
App note: BLDC with hall effect sensors using SCT on LPC84x
Motor control on LPC84x MCU app note from NXP. Link here (PDF) This application note describes an implementation of brushless DC motor control with hall effect sensors using the SCTimer/PWM on LPC84x.
App note: Ambient light sensor SFH5701
App note from OSRAM on their ALS device SFH5701, its operation and application method. Link here (PDF) The SFH5701 is a small, two-wire, linear output current ambient light sensor (ALS) with current amplifier and dark current compensation. The ALS is capable of resolving a wide range of ambient light levels (10 mlx – 10 klx) […]
App note: Low-current charger provides battery backup from USB to 1-cell applications
Another app note from Maxim Integrated on small current battery management. Link here (PDF) The circuit provides a 1-cell Li ion backup battery charger for low-current devices performing resistor limited current sharing
App note: How to achieve greater accuracy in battery capacity readings for portable designs
App note from Maxim Integrated on using fuel gauge IC to obtain accurate battery state of charge readings. Link here (PDF) Because a product’s runtime is limited by battery capacity, it’s critical to have a precise method for measuring the remaining battery capacity to avoid an unexpected shutdown. This application note describes an experiment for […]
App note: Single-Channel power supply monitor with remote temperature sense
App note from Linear Technology using their LTC2970 to monitor external temperature aside from doing power management. Link here (PDF) Many applications with a single power regulator can benefit from the monitoring and control features of a power supply manager, but most power supply manager ICs have more than one channel. In an application that […]
App note: AMR angle sensors
Position measurement sensor using magnetoresistive technology discussed in this app note from Analog Devices. Link here (PDF) Anisotropic magnetoresistive (AMR), thin film materials are becoming increasingly important in today’s position sensing technologies. Magnetoresistive (MR) position measurement has many advantages over traditional technologies. Reliability, accuracy, and overall robustness are the primary factors contributing to the development […]