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AND9013 CAT3661 LED Driver Evaluation Board APPLICATION NOTE
AND9013 CAT3661 LED Driver Evaluation Board APPLICATION NOTE

... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
Low Power Design for D-Flip Flops
Low Power Design for D-Flip Flops

... building blocks of electronics system used in computers, communications and many other systems. They are used for storage of states. When used for infinite storage machines the output and the next state depends not only on current inputs, but also on current state, it can be used for counting pulses ...
here
here

... another, analog, signal. To do this you will use a technique called pulse width modulation, or PWM. This technique is useful because transistors can be used either fully on (voltage is close to zero, so power is close to zero) or fully off (current is zero, so power is zero). This switching is done ...
MOH Goat Autonomous Operation
MOH Goat Autonomous Operation

... • Operate motors on left side of perf map • Air-cooled motors cannot operate near stall for more than a few seconds • Control top speed of operation by suitable gearing not by reduced voltage • Avoid powered anti-backdrive • Driveline ROT: no wheel-spin when blocked? = TOO HIGH GEARED! ...
3-phase motor control demonstration board featuring IGBT
3-phase motor control demonstration board featuring IGBT

... A generic motor control system can be basically schematized as the combination of three main blocks (see Figure 2): ...
Chapter 6: Analog Electrical Devices
Chapter 6: Analog Electrical Devices

... It is widely used in data-acquisition systems using A/D converters. The circuit tracks the signal until it is triggered to sample the signal and hold it. ...
Series Stacking of TVS for Higher Voltages and Power Application
Series Stacking of TVS for Higher Voltages and Power Application

... be invisible to the protected circuit. This is guaranteed by a very low leakage current at reverse stand-off voltage. As long as this voltage is not exceeded, the above mentioned feature is applicable. Some TVS applications require a very high stand-off voltage, which is beyond the highest available ...
Power quality: Innovation in harmonic filtering
Power quality: Innovation in harmonic filtering

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Description The FC-33 is a DIN rail mount, selectable input / output
Description The FC-33 is a DIN rail mount, selectable input / output

... useful in eliminating ground loops and interfacing sensors to our PLC analog input modules. The FC-33 has 3 way isolation, this feature solves many types of configuration problems. For example, the signal conditioner can be configured for sinking input and sourcing output. It also allows signal tran ...
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FLYSYS FlashLamp System

... zBus (ZB1PS). No PC interface is required for FD1 operation. ...
design of low power test pattern generator
design of low power test pattern generator

... For a CMOS inverter, the dynamic power is dissipated mainly due to charging and discharging of the load capacitance. When the input to the inverter is switched to logic state 0, the PMOS is turned ON and the NMOS is turned OFF. This establishes a resistive DC path from power supply rail to the inver ...
Document
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Grid-Connection Control and Simulation of PMSG Wind Power
Grid-Connection Control and Simulation of PMSG Wind Power

... ac  voltage  to  be  increased  without  an  output   transformer.  In  addition,  the  cancellation  of  low  frequency  harmonics  from  the  ac  voltages  at  the  different  levels  means  that  the  size  of  the  ac  inductance can be reduced, a consequent decrement of  the  expenses  of  the  ...
Atmel LED Driver-MSL1060
Atmel LED Driver-MSL1060

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... voltage value will be displayed in the adjacent edit box. The actual boost output voltage can be seen in the Read Back Values group box. To use the software automatic control, click on the radio button next to the Software Control group box. The edit box next to the Set button is used to change the ...
harmonic mitigation in wind turbine energy conversion systems
harmonic mitigation in wind turbine energy conversion systems

... low THD in the input current, a simple structure using just one controlled device and could be controlled using a simple control strategy easily implemented with generalpurpose PWM integrated circuits (IC) controllers. The transistor can operate at constant switching frequency. The control of the DC ...
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PC-6011SD - Test and Measurement Instruments CC

... SD memory card , sampling time set from 2 to 7200 seconds. Just slot in the SD card into the computer, it can down load the all the measured value with the time information ( year, month, data, hour, minute, second ) to the Excel directly, then user can make the further data analysis by themselves. ...
POWER SUPPLY DESIGN BASICS
POWER SUPPLY DESIGN BASICS

What`s on the board?
What`s on the board?

... which can be used to ground your circuit. 5V (4) & 3.3V (5): As you might guess, the 5V pin supplies 5 volts of power, and the 3.3V pin supplies 3.3 volts of power. Most of the simple components used with the Arduino run happily off of 5 or 3.3 volts. Analog (6): The area of pins under the ‘Analog I ...
Automotive High Brightness LED Control Based on the
Automotive High Brightness LED Control Based on the

... will be variable as well. The simple buck-boost topology shown in Figure 9 might look like an easy and cheap solution, but as stated in its transfer function (Equation 3), the output voltage is negative and referenced to VBAT. Because of this, the application requires a complex and expensive current ...
electronic horn based on msp430 for automotive
electronic horn based on msp430 for automotive

... Driving high inductive loads at frequencies ranging in a few hundreds of Hz is not an easy task. This task becomes even more difficult when you are limited with a form factor of PCB and limited air flow because the PCB is enclosed in the horn. The inductive coil of the horn is driven by a low-side M ...
A Simple Method to Measure Unknown Inductors
A Simple Method to Measure Unknown Inductors

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Pulse-width modulation



Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a modulation technique used to encode a message into a pulsing signal. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers, the other being MPPT.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load.The PWM switching frequency has to be much higher than what would affect the load (the device that uses the power), which is to say that the resultant waveform perceived by the load must be as smooth as possible. Typically switching has to be done several times a minute in an electric stove, 120 Hz in a lamp dimmer, from few kilohertz (kHz) to tens of kHz for a motor drive and well into the tens or hundreds of kHz in audio amplifiers and computer power supplies.The term duty cycle describes the proportion of 'on' time to the regular interval or 'period' of time; a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle.PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.
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