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MXT2576 Series SIMPLE SWITCHER 3A Step
MXT2576 Series SIMPLE SWITCHER 3A Step

... 4 square inches of copper area surrounding the leads. Note 10: If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package. Using 0.5 square inches of copper area, JA is 50 C/W, with 1 square inch of copper area, JA i ...
ICL7106, ICL7107
ICL7106, ICL7107

abstract - KFUPM Faculty List
abstract - KFUPM Faculty List

... A basic block diagram for complete power supply is shown in figure below. The first block in a dc power supply is the power transformer. It consists of two separate coils wound around an iron core that magnetically couples the two windings. The primary winding having N1 turns, is connected to the 12 ...
HMC221
HMC221

... HMC221 SOT26 SPDT SWITCH DC - 3 GHz FEBRUARY 2001 ...
DRV601 数据资料 dataSheet 下载
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MAX6610,11 - Maxim Integrated
MAX6610,11 - Maxim Integrated

... with a low-power voltage reference. The reference voltage and temperature sensor gain give convenient LSB weights when used with an ADC. For example, when an 8-bit ADC is used with the MAX6610/MAX6611, an LSB is equivalent to 1°C and a 10-bit ADC LSB is equivalent to 0.25°C. The reference output fea ...
RESISTORS FOR LIGHTING APPLICATIONS
RESISTORS FOR LIGHTING APPLICATIONS

An RF–DC Converter with Wide Dynamic Range Input Matching For
An RF–DC Converter with Wide Dynamic Range Input Matching For

... impedance as a function of input power. Class-E power amplifiers achieve significantly higher efficiency than conventional Class-B or –C amplifiers. In Class-E,the transistor operates as an on/off switch and the load network shapesthe voltage and current waveformsto prevent simultaneoushigh voltage ...
MNS ® iRPP
MNS ® iRPP

... ABB MNS® iRPP I comprises of SMISSLINE TP socket system as distribution chassis to provide IPXXB protection for the branch MCBs and facilitate ‘hot swap’ of circuits. The current measurement system (CMS) continuously measures the current consumption in each branch circuit and the energy analyzer pro ...
M.E. Power Electronics and Drives
M.E. Power Electronics and Drives

k6 audio power amplifier assembly manual
k6 audio power amplifier assembly manual

... large filter capacitors, since they are charged at the relatively low rate of the power line frequency. While some manufacturers of amplifiers tout this large energy storage as a virtue, it is not in fact a necessity for driving audio loads, and constitutes a destructive threat to the output transis ...
Source Transformation
Source Transformation

Evaluates:  DS2710 DS2710 Evaluation Kit General Description Features
Evaluates: DS2710 DS2710 Evaluation Kit General Description Features

... (R9). The DS2710 regulates the charge current to maintain a voltage drop of 113mV typical across the sense resistor during fast-charge. The charge rate can therefore be selected by: ...
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PowerPoint

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PXE Data Sheet

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4. Electrical characteristics

... Low voltage wiring is insulated with black PVC, 1000 V grade, with the following cross-sections: - 2,5 sq. mm for currents circuits, - 1,5 sq. mm for voltage circuits. Each extremity of wire is marked using the independent marking system. 4.11 Quick discharge coils (optional) Quick discharge coils a ...
SRAM Voltage Stacking - University of California, Santa Cruz
SRAM Voltage Stacking - University of California, Santa Cruz

... Delivering power to the logic in a chip is one of the major challenges in current chip design [7]. As technology scales down, the reduction in voltage supply has led to a sharp increase in the total current that needs to be delivered to a chip. Decreasing voltage has been shown to reduce efficiency ...
EM720 POWER QUALITY AND REVENUE METER
EM720 POWER QUALITY AND REVENUE METER

SUR357Z / SUR358Z - Bender Benelux BV
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... Product description ...
INA116 数据资料 dataSheet 下载
INA116 数据资料 dataSheet 下载

... proper operation. Figure 3 shows resistors R1 and R2 to provide an input current path. Without these resistors, the inputs would eventually float to a potential that exceeds the common-mode range of the INA116 and the input amplifiers would saturate. Because of its exceedingly low input bias current ...
ADC12C080 12-Bit, 65/80 MSPS A/D Converter (Rev. C)
ADC12C080 12-Bit, 65/80 MSPS A/D Converter (Rev. C)

... All voltages are measured with respect to GND = AGND = DRGND = 0V, unless otherwise specified. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is specified to be functional, but do not ensure specific pe ...
2.5V or 3.3V, 200-MHz, 9-Output Clock Driver,CY29350 - tyro
2.5V or 3.3V, 200-MHz, 9-Output Clock Driver,CY29350 - tyro

... PLL enabled. The VCO output connects to the ...
AS1341
AS1341

RD-021M8
RD-021M8

... This product is designed to be incorporated into general industrial machinery, and is NOT developed to be used in devices such as aerospace machines, security equipment, or other safety devices where a failure or malfunction of this product may directly threaten human lives or health. Even if you us ...
Dual Bridge Stepper or DC Motor Driver (Rev. C)
Dual Bridge Stepper or DC Motor Driver (Rev. C)

... When an H-bridge is enabled, current rises through the winding at a rate dependent on the supply voltage and inductance of the winding. If the current reaches the current chopping threshold, the bridge disables the current until the beginning of the next PWM cycle. Note that immediately after the cu ...
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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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