Pepco Holdings` Distributed Energy Resources
... trademark, manufacturer , or otherwise does not necessarily constitute or imply its endorsement , recommendation, or favoring by the United States Government or any agency thereof . The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Gove ...
... trademark, manufacturer , or otherwise does not necessarily constitute or imply its endorsement , recommendation, or favoring by the United States Government or any agency thereof . The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Gove ...
The circuit current
... limit the amount of current flowing in circuits or parts of circuits. Resistors are roughly cylindrical and have coloured stripes. They also have connection wires sticking out of each end. The stripes indicate the value of the resistors. The colours represent numerical values according to a special ...
... limit the amount of current flowing in circuits or parts of circuits. Resistors are roughly cylindrical and have coloured stripes. They also have connection wires sticking out of each end. The stripes indicate the value of the resistors. The colours represent numerical values according to a special ...
TPS54900 数据资料 dataSheet 下载
... The reference system consists of a band-gap circuit, four digital to analog converter outputs (DACs), and smoothing filters. The reference system provides independent set-point voltages to the PWM control loops of each channel, and are programmed via the 4-wire serial port. Output control of the reg ...
... The reference system consists of a band-gap circuit, four digital to analog converter outputs (DACs), and smoothing filters. The reference system provides independent set-point voltages to the PWM control loops of each channel, and are programmed via the 4-wire serial port. Output control of the reg ...
MAX2673EVKIT.pdf
... Figure 1 is the schematic for the EV kit as shipped. The output matching components (L1, L2, C4, and C5) are optimized for an output frequency of 900MHz. Capacitor C1 is a DC-blocking capacitor for the LO input port. To reduce the possibility of noise pickup, resistor R2 and capacitor C9 form a lowp ...
... Figure 1 is the schematic for the EV kit as shipped. The output matching components (L1, L2, C4, and C5) are optimized for an output frequency of 900MHz. Capacitor C1 is a DC-blocking capacitor for the LO input port. To reduce the possibility of noise pickup, resistor R2 and capacitor C9 form a lowp ...
TLC372-EP 数据资料 dataSheet 下载
... LinCMOS products are being used in actual circuit environments that have input voltages that exceed the recommended common-mode input voltage range and activate the input protection circuit. Even under normal operation, these conditions occur during circuit power up or power down, and in many cases, ...
... LinCMOS products are being used in actual circuit environments that have input voltages that exceed the recommended common-mode input voltage range and activate the input protection circuit. Even under normal operation, these conditions occur during circuit power up or power down, and in many cases, ...
MAX8545/MAX8546/MAX8548 Low-Cost, Wide Input Range, Step-Down Controllers with Foldback Current Limit General Description
... The MAX8545/MAX8546/MAX8548 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers ideal for a variety of cost-sensitive applications. They drive low-cost n-channel MOSFETs for both the high-side switch and synchronous rectifier, and require no external current-sense resistor. The ...
... The MAX8545/MAX8546/MAX8548 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers ideal for a variety of cost-sensitive applications. They drive low-cost n-channel MOSFETs for both the high-side switch and synchronous rectifier, and require no external current-sense resistor. The ...
1 Introduction 2
... 3. The reaction time must be short. The shortest possible reaction time is equal to one half voltage period = 10 ms at 50 Hz. 4. The measurement must be valid also for non sine-shaped currents, as is for instance seen with measurement before frequency inverters, which generate very high and short cu ...
... 3. The reaction time must be short. The shortest possible reaction time is equal to one half voltage period = 10 ms at 50 Hz. 4. The measurement must be valid also for non sine-shaped currents, as is for instance seen with measurement before frequency inverters, which generate very high and short cu ...
LMV793/LMV794 88 MHz, Low Noise, 1.8V
... limited self-heating of the device such that TJ = TA. No specification of parametric performance is indicated in the electrical tables under conditions of internal self-heating where TJ > TA. Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through ...
... limited self-heating of the device such that TJ = TA. No specification of parametric performance is indicated in the electrical tables under conditions of internal self-heating where TJ > TA. Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through ...
RA07M0608M 数据资料DataSheet下载
... were not specifically designed for use in other applications. In particular, while these products are highly reliable for their designed purpose, they are not manufactured under a quality assurance testing protocol that is sufficient to guarantee the level of reliability typically deemed necessary f ...
... were not specifically designed for use in other applications. In particular, while these products are highly reliable for their designed purpose, they are not manufactured under a quality assurance testing protocol that is sufficient to guarantee the level of reliability typically deemed necessary f ...
_______________General Description ____________________________Features
... INO = 1.0mA, VCOM = ±10V INO = 1.0mA, VCOM = ±10V ...
... INO = 1.0mA, VCOM = ±10V INO = 1.0mA, VCOM = ±10V ...
(DVR) Using Sinusoidal Pulse Width Modulation
... industrial installations are due to voltage sags [2]-[4]. According to IEEE Std. 1159-1995, sag is defined as a decrease in rms voltage or current between 0.1pu and 0.9 pu at the power frequency for durations from 0.5 cycles to 1 min. Sags and swells are characterized by their magnitude as well as t ...
... industrial installations are due to voltage sags [2]-[4]. According to IEEE Std. 1159-1995, sag is defined as a decrease in rms voltage or current between 0.1pu and 0.9 pu at the power frequency for durations from 0.5 cycles to 1 min. Sags and swells are characterized by their magnitude as well as t ...
Physics Week 3(Sem. 2)
... Below this temperature, such materials are called superconductors. The name derives from the fact that with zero resistivity, these materials offer no resistance to electric current and are, therefore, perfect conductors. One of the remarkable properties of zero resistivity is that once a cur ...
... Below this temperature, such materials are called superconductors. The name derives from the fact that with zero resistivity, these materials offer no resistance to electric current and are, therefore, perfect conductors. One of the remarkable properties of zero resistivity is that once a cur ...
Unit 2 Electricity and Energy
... Electrical conductors contain electrons which are free to move throughout the structure. In electrical insulators, the electrons are tightly bound and cannot move. All circuits need a source of energy and some electrical components which are connected by wires. The source of energy may be a battery ...
... Electrical conductors contain electrons which are free to move throughout the structure. In electrical insulators, the electrons are tightly bound and cannot move. All circuits need a source of energy and some electrical components which are connected by wires. The source of energy may be a battery ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.