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App note: Pulsed Over-Current Driving of LEDs

Sunday, May 20th, 2018

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...

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App note: Optimizing PCB Thermal Performance for LEDs

Sunday, May 20th, 2018

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...

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App note: Avoidance of ceramic-substrate-based LED chip cracking induced by PCB bending or flexing

Sunday, May 13th, 2018

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...

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App note: Power management solution – Constant Voltage (CV) pulse charging of hybrid capacitors

Sunday, May 13th, 2018

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...

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App note: How to implement an SCR or a Triac in hybrid relay applications

Sunday, May 6th, 2018

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...

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App note: AC switches – Is a positive power supply mandatory for my application, or could a negative output work also?

Sunday, May 6th, 2018

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...

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App note: Electrical techniques for using different power sources on vibration motors

Sunday, April 29th, 2018

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...

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App note: Map colors of a CIE plot and color temperature using an RGB color sensor

Sunday, April 29th, 2018

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...

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App note: Using 8-Bit MCUs in 5 volt systems

Sunday, April 22nd, 2018

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...

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App note: High-speed lithium-ion battery charger

Sunday, April 22nd, 2018

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....

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App note: Preventing LED failures caused by corrosive material

Sunday, April 15th, 2018

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...

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App note: LEDs for wearable applications

Sunday, April 15th, 2018

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.

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App note: Fundamentals of operation and recent developments of class D amplifiers

Sunday, April 8th, 2018

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...

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App note: Avoid overvoltage stresses by minimizing power supply pumping on single-ended output, class D audio amplifiers

Sunday, April 8th, 2018

Here's class D audio amplifier pumping remedy from MAXIM Integrated, power-supply pumping is a problem that occurs when playing low-frequency audio signals through a single-ended output. Link here (PDF) This application note explains what power-supply pumping is and how it occurs in designs that employ a Class D audio amplifier...

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App note: Performance of noise canceller of LC823450

Sunday, April 1st, 2018

Audio Noise cancelling LC823450 from ON Semiconductor. Link here (PDF) This application note describes the performance of Noise Canceller of LC823450 Series. The customer can improve of audio characteristics by using this canceller. Its function can be used for various products such as Wireless headset, Earbads, Wireless speaker or IC−recoder.

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App note: Performance of echo canceller of LC823450

Sunday, April 1st, 2018

Audio application echo canceller LC823450 from ON Semiconductor. Link here (PDF) This application note describes the performance of Echo canceller of LC823450 Series. The customer can improve the sound quality of hands free communication by using this canceller. Its function can be used for various products such as Wireless headset....

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App note: Enable pin operation and functions of eFuses

Sunday, March 25th, 2018

Get to know a number of useful usage of the enable pin of ON Semiconductor's eFuse. Link here (PDF) ON Semiconductor electronic fuses (eFuses) are analog integrated circuits that are used to protect circuits operating from 3.3, 5, or 12 V DC supplies. They have numerous protection functionalities such as...

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App note: eFuse load current measurement

Sunday, March 25th, 2018

App note from ON Semiconductor on eFuse current measurement. Link here (PDF) This application note describes the load current measurement solution for the eFuses which do not provide load current monitoring feature. Since almost all of the eFuses provide adjustable current limit functionality by utilizing an external current limiting resistor...

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App note: Sub-1 V current sensing with the TS1001, A 0.8 V, 0.6 µA OP-AMP

Sunday, March 18th, 2018

Another TS1001 op-amp application from Silicon Labs on sensing nano currents. Link here (PDF) Current-sense amplifiers can monitor battery or solar cell currents, and are useful to estimate power capacity and remaining life. However, if the battery or solar source is a single cell, it’s difficult to find a low...

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App note: A microwatt charge pump boosts 1 V to 1.8 V at 90% efficiency, providing “Always On” standby power for microcontrollers

Sunday, March 18th, 2018

Interesting app note from Silicon Labs on high efficiency charge pump utilizing their nanopower TS1001 op amp. Link here (PDF) Boosting the output voltage of common alkaline button-cells to at least 1.8 V needed by microcontrollers provides an “always on” standby power source sufficient for low-power oscillator interrupt/sleep state operation....

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