Different TVS configuration usage app note from ON Semiconductor. Link here (PDF) Transient Voltage Suppression (TVS) protection is important because EMI and ESD can disturb the operation of the system, produce permanent damage or cause latent damage that will eventually cause a failure. Avalanche TVS diodes and diode arrays are available in a number of […]
Tag Archives: app note
App note: How to select an ambient light sensor for your end equipment
Another application note from Texas Instruments about ambient light sensors and how to effectively use them. Link here (PDF) Generally, when someone thinks of trying to design a system with an ambient light sensor there are four main concerns or problems that need to be addressed. The most important features of an ambient light sensor […]
App note: How to isolate signal and power in isolated CAN systems
CAN system isolation app note from Texas Instruments, Link here (PDF) With the increase in the usage of signal isolation in many industrial and automotive applications, the need for isolated power has also increased. The benefits of isolation are lost if the power supplies on either side of the isolation barrier are simply shorted. At […]
App note: Detecting selfie sticks using TI audio jack switches TS3A227E and TS3A225E
Old app note from Texas Instruments on smart phone selfie sticks button detection. Link here (PDF) Selfie sticks are becoming as common of a smart phone accessory as a pair of headphones. Because of the selfie stick’s increasing popularity, smart phone manufacturers need to be able to accommodate the accessory. This report describes the procedure […]
App note: EMI-hardened operational amplifiers reduce inaccuracies
EMI reduction built-in on op amps, app note from Texas Instruments. Link here (PDF) Operational amplifiers (op amps) with electromagnetic interference (EMI) filters can reduce significant errors. These types of errors are not always obvious to the system designers. They often impact the signal chain, in particular the analog-to-digital converter in the form of a […]
App note: How to properly configure unused operational amplifiers
Good read app note from Texas Instruments about configuring unused op amps on multi amp chips. Link here (PDF) Multi-channel operational amplifiers (op amps) are often implemented in circuits that do not require the use of all channels. Undesired behavior in an unused amplifier channel can negatively impact system performance, as well as the performance […]
App note: Current sense amplifiers in class-D audio subsystems
App note from Texas Instruments about output current sensing in class-D amplfiers. Link here (PDF) Current sensing in audio subsystems are widely used in conjunction with CLASS-D amplifiers for diagnostics or to provide speaker current feedback to the DSP for speaker enhancement to emulate smartamp. The most expensive component in the audio subsystem is the […]
App note: Pulsed Over-Current Driving of LEDs
App note from CREE on driving LEDs over its specified current capability. Link here (PDF) The Applications Engineering team at Cree is often asked whether it is safe to operate Cree XLamp® LEDs with pulsed currents above the maximum data-sheet rating. This question is usually asked in the context of legitimate product requirements such as […]
App note: Optimizing PCB Thermal Performance for LEDs
Application note from CREE on efficiently designing a conventional FR4 PCB to manage thermal heat and as a cheap alternative to metal core pcbs. Link here (PDF) One of the most critical design parameters for an LED illumination system is the system’s ability to draw heat away from the LED junction. High operating temperatures at […]
App note: Avoidance of ceramic-substrate-based LED chip cracking induced by PCB bending or flexing
Application note from CREE on the causes of ceramic-substrate-based failures due to PCB board stresses and how to minimize their occurrence. Link here (PDF) Printed circuit board (PCB) bending and/or flexing is an unavoidable phenomenon that is known to exist and is easily encountered during electronic board assembly processes. PCB bending and/or flexing is the […]
App note: Power management solution – Constant Voltage (CV) pulse charging of hybrid capacitors
App note from Vishay about constant voltage (CV) pulse charging as the most cost-efficient solution to use on Hyrid capacitors. Link here (PDF) Rechargeable energy storage solutions are of high interest because of their flexibility, low maintenance requirements, and reduced cost over their life-cycle. For compact applications, classic electrolytic capacitors are environmentally friendly alternatives and […]
App note: How to implement an SCR or a Triac in hybrid relay applications
Another app note from STMicroelectronics on SCR or Triac hybrid with mechanical relay to decrease power loss and manage inrush current. Link here (PDF) This document gives some key information about the design of the solid-state silicon AC switch stage of a hybrid relay, which can drive resistive, capacitive or inductive AC loads, such as: […]
App note: AC switches – Is a positive power supply mandatory for my application, or could a negative output work also?
App note from STMicroelectronics about the usage of a negative supply in controlling AC switches and their benefits, Link here (PDF) In this application note we explain the reasons why some appliance designers might choose a positive power supply. This selection is based mainly on the choice of switched mode power supply (SMPS). Some specific […]
App note: Electrical techniques for using different power sources on vibration motors
Application bulletin from Precisionmircodrives on powering vibration motors from different and some cases fluctuating power sources. Link here (PDF) As vibration motors have a wide variety of applications, they are often integrated into systems which have different power sources. A common concern, in terms of power supply, is adjusting the source power supply voltage to […]
App note: Map colors of a CIE plot and color temperature using an RGB color sensor
An app note from MAXIM integrated on RGB color sensor and their capability to correct color deviation by providing feedback based on a reference color. Link here (PDF) This application note will show how all the colors within the color gamut formed by red, green, and blue constants in a CIE plot can be measured […]
App note: Using 8-Bit MCUs in 5 volt systems
Integrating a low voltage 3V MCU EFM8 from Silicon Labs to 5 volt sytem. Link here (PDF) When using a 3 V device in a 5 V system, the user must consider: • A 3 V power supply must be provided. • A 5 V device driving a 3 V input. • A 3 V […]
App note: High-speed lithium-ion battery charger
C8051F300 implementation of Li-Ion battery charger from Silicon Labs. Link here (PDF) Driven by the need for untethered mobility and ease of use, many systems rely on rechargeable batteries as their primary power source. The battery charger is typically implemented using a fixedfunction IC to control the charging current/voltage profile. The C8051F300 family provides a […]
App note: Preventing LED failures caused by corrosive material
Chemical compatibility of LEDs application note from OSRAM. Link here (PDF) The performance and stability of light emitting diodes (LEDs) may be influenced by various chemical incompatibilities arising from chemicals and materials used, amongst other things, in luminaire construction, or by gases in the proximate environment of LEDs during field operation. Nevertheless, LEDs have to […]
App note: LEDs for wearable applications
Brief app note from OSRAM, LEDs for heart rate monitoring through skin reflection of emitted light. Link here (PDF) This application note provides a short introduction into the general use of LEDs for wearable applications, with a focus on heart rate monitoring.
App note: Fundamentals of operation and recent developments of class D amplifiers
Good read about class D amplfiers from MAXIM Integrated. Link here (PDF) A Class D amplifier’s high efficiency makes it ideal for portable and compact high-power applications. Traditional Class D amplifiers require an external lowpass filter to extract the audio signal from the pulse-width-modulated (PWM) output waveform. Many modern Class D amplifiers, however, utilize advanced […]