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Archive for the ‘app notes’ Category

App note: How to measure thermal resistance of LED emitters and LED arrays

Sunday, June 18th, 2017

Another white paper from Lumileds about LED thermal resistance. Link here (PDF) Thermal performance is the most critical factor of a well-designed LED lighting system. A lighting system with proper thermal design has higher efficacy, meaning more light can be extracted using less energy, and better long term reliability.

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App note: Flash for “Selfies”

Sunday, June 18th, 2017

Effective front facing camera flash discussed in this white paper from Lumileds. Link here (PDF) Smartphones are ubiquitous in everybody’s daily lives, a trend that shows no sign of slowing. A key component of the smartphone is the camera, which has gained market share over Digital Still Cameras due to...

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App note: DAC ICs: How many bits is enough?

Sunday, June 11th, 2017

A very old application notes from Analog Devices that tells about Nyquist Theorem, sampling rate and quantization used on DACs. Link here (PDF) At the heart of every digital audio playback system lies the single-most critical component for high-fidelity audio: the digital-to-analog converter (DAC). These converters handle the delicate task...

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App note: Influence of control loop by an output filter

Sunday, June 11th, 2017

Application note from Würth Elektronik about the effect of filters that are added to the output of switching regulators. Link here The output voltage of switching regulators has a voltage ripple that can disturb with electrical power supplied circuits and lead to electromagnetic disturbances. Thus output filters are often used...

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App note: Ceramic multilayer capacitors in HF SMPS applications

Sunday, June 4th, 2017

Development and improvement of ceramic multilayer capacitors in high frequency power supply filtering, a technical note from AVX. Link here (PDF) There has been an explosion of interest in the use of ceramic capacitors for high frequency power conversion applications. This interest is compounded with new designs striving for higher...

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App note: Output filter caps for mission critical applications

Sunday, June 4th, 2017

A great guide from AVX on output capacitor types and their specific uses based on ESR, ESL and temperature properties. Link here (PDF) This document discusses the effect of capacitors on output power quality. It evaluates and provides a comparison of different capacitor technologies, their high reliability qualification availability from...

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App note: Application of leaded resistors in energy meters

Sunday, May 28th, 2017

App note from Vishay about energy meter circuits and the use of leaded resistors on them. Link here (PDF) An electric meter or energy meter is a device that measures the amount of electrical energy supplied to a residence or business. It is also known as (k)Wh meter. The main...

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App note: Overcurrent protection with Thin Film resistors technology

Sunday, May 28th, 2017

A technical note about Thin Film fuses from Vishay. Link here (PDF) Thin film technology is an established technology for high-grade passive components, which has been proved and refined over decades. Its advantages in terms of accuracy, repeatability and stability are appreciated in mass production for billions of thin film...

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App note: Interfacing to analog switches: Driving the control input of an analog switch with 1.8 V or lower − Is it safe?

Sunday, May 21st, 2017

ON Semiconductor's analog switches let you drive with an input control voltage lower than Vcc. Link here (PDF) Analog switches are everywhere today. Due to their small size and low current consumption, they are popular in portable devices where they are effective in a variety of subsystems including audio and...

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App note: Consideration of self-pollution reduction for electronic systems

Sunday, May 21st, 2017

App note from ON Semiconductors discussing how locally generated EMI affects its own system and how to prevent it. 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...

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App note: Active capacitor discharge circuit considerations for FPGAs

Sunday, May 14th, 2017

Power down sequencing and discharging on FPGAs app note from Diodes Incorporated. Link here (PDF) FPGA’s need the different power rails to be powered up and down in a defined sequence. For power down, each sequenced rail needs to be fully off before the next rail is turned off. With...

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App note: Power supply rejection for low-jitter clocks

Sunday, May 14th, 2017

Method of rejecting noises from power supply, an app note from Silicon Labs. Link here (PDF) Hardware designers are routinely challenged to increase functional density while shrinking the overall PCB footprint of each new design. One significant challenge is minimizing clock jitter through careful board design while meeting the design's...

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App note: Nonvolatile STANDBY/ON Switch

Sunday, May 7th, 2017

Power status recovery in this application note from Maxim Integrated. Link here (PDF) Using an electronically programmable voltage reference (DS4305) as a single-bit nonvolatile memory cell, this circuit remembers the state of a STANDBY/ON switch that changes state with no operator present.

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App note: Single-pushbutton ON/OFF power control

Sunday, May 7th, 2017

With the help of an MAX6816 debouncer from Maxim Integrated to form a single push button power switch. Link here (PDF) This application note presents a single-pushbutton power-control circuit. The design consists of an ON/OFF control circuit comprised of a push button, debouncer, and flip-flop. This circuit toggles the power...

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App note: Automotive reverse battery protection diode

Sunday, April 30th, 2017

Super Barrier Rectifier™ (SBR) from Diodes Incorporated offers good power efficiency compared to normal PN junction diode and design simplicity compared to MOSFETs reverse protection. Link here (PDF) This application note compares the performance of Diodes Inc. Super Barrier Rectifier™ (SBR) as an automotive reverse battery protection diode with other...

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App note: A closer look at LVDS technology

Sunday, April 30th, 2017

A general overview of Low Voltage Differential Signaling (LVDS) from Diodes incorporated. Link here (PDF) With the increase in demand for high throughputs, current technologies are becoming less efficient. Data transmission devices like RS-422, RS-485, SCSI and other devices are limited in data rate and power dissipation. With LVDS, data...

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App note: iCoupler® Isolation in CAN bus applications

Sunday, April 23rd, 2017

Application note from Analog Devices on CAN bus system isolation. Link here (PDF) The intention of this application note is to give the user a brief overview of the CAN bus protocol, focusing on the system physical layer, as well as an understanding of why isolation is so important to...

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App note: Safety considerations and layout recommendations for digital isolators

Sunday, April 23rd, 2017

Application note from Silicon Labs about end user safety against high voltage shock that are designed together with digital isolators. Link here (PDF) This application note details the creepage and clearance requirements of an isolator type component, such as a digital isolator, used to provide protection from electric shock. It...

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App note: Understanding undervoltage lockout in display power devices

Sunday, April 16th, 2017

Texas Instrument's application note about how undervoltage lockout (UVLO) protect devices from undefined behavior. Link here (PDF) Many integrated circuits include an undervoltage lockout (UVLO) function to disable the device at low supply voltages. Below the minimum supply voltage the function and performance of a device may be undefined, making...

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App note: Driving of OLEDs

Sunday, April 16th, 2017

Application note from OSRAM on driving OLEDs with constant current for longer operation. Link here The operation of OLEDs with electronic drivers is similar to anorganic LEDs for the most part. In a majority of applications, standard LED drivers may be used also for OLEDs. Nevertheless, there are some important...

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Recent Comments

  • Parkview: Another great idea! Be handy to be able to purchase the corresponding SMD and TH sockets as well.
  • Ryan White: Second that. I'd love the option to extend this already awesome tool to RF cables, hoping it's already in the works because I know the...
  • Tom Keddie: Hi Ian, Congrats on the launch. Suggest you name all the CHRO connectors you have as female. It's not done often but you can insert...
  • Craig Hollabaugh: Excellent post! Thanks
  • Drone: We need RF/Coaxial cables with connectors. Pre-made custom RF cables/connectors are insanely high in price. We'll pay more for an option to sweep them.