1W to 5W LED Driver

This reference document describes a built and tested for a 1 to 5WLED driver forMR16 LED replacement. The circuit is proposed for driving HB--LED (high--brightness LED) in a variety of lighting applications but is configured in size and features for an MR16 LED replacement. Configurations like this are found in 12 Vac / 12 Vdc…

FFT Terminology in the Oscilloscope Environment

The ability to analyze the frequency domain with the Fast Fourier Transform (FFT) has opened up a whole new set of opportunities in digital oscilloscopes. However, the user needs to understand the capabilities and constraints of both the measurement techniques and the instruments that perform them. With the aid of practical examples, this paper helps…

Sensitivity of PMMC Voltmeter

The current sensitivity of voltmeter of moving coil type like PMMC voltmeter is defined as the deflection per unit current in the coil. If Ɵ be the angular deflecting of needle of voltmeter for current I through the moving coil, then sensitivity of voltmeter is given as S = Ɵ / I You might think…

Two-Phase Digital Power Factor Correction

Project Summary This High Power Two-Phase Digital Power Factor Correction reference design builds upon Digital Power Control technology and extends it to high power levels in the area of Power Factor Correction (PFC). It introduces fast switching, high current, high voltage X2-class MOSFETs and incorporates Digital Inrush Current Control concepts. Functional control is based upon…

How does a Diode work ?

A diode is a device which only allows unidirectional flow of current if operated within a rated specified voltage level. A diode only blocks current in the reverse direction while the reverse voltage is within a limited range otherwise reverse barrier breaks and the voltage at which this breakdown occurs is called reverse breakdown voltage.…

Low-Cost Fan Control Solution

Challenge Fan controllers are expensive to manufacture due to the use of expensive components such as transformers and regulator circuitry. Find a way to reduce the cost of building a fan control solution. Solution Design a Z8 Encore! XP® 8-pin Z8F04 microcontroller-based fan controller powered by a low-cost power supply that eliminates the need for…

PIC24FV16KM202 CLASS D AMPLIFIER

Class D amplifiers have become a popular audio amplifier topology due to their high efficiency and subsequent low cost. The high current output stage is implemented using binary switches, resulting in minimal heat generation and power loss. This allows for the power supply, heat sink and overall physical size of the amplifier to be minimized.…