Power - CIS @ UPenn - University of Pennsylvania
... • Cubic decrease in dynamic power • Linear decrease in performance (actually sub-linear) • Thus, only about quadratic in energy • Linear decrease in static power • Thus, only modest static energy improvement ...
... • Cubic decrease in dynamic power • Linear decrease in performance (actually sub-linear) • Thus, only about quadratic in energy • Linear decrease in static power • Thus, only modest static energy improvement ...
Aerowave - Index of
... same values for both current and time, so each half of the wave looks identical. If the values for current and time are not exactly the same, the waveform is then asymmetric. ...
... same values for both current and time, so each half of the wave looks identical. If the values for current and time are not exactly the same, the waveform is then asymmetric. ...
FSB117H / FSB127H / FSB147H mWSaver™ Fairchild Power Switch (FPS™)
... The HV pin can detect the AC line voltage using a switched voltage divider that consists of external resistor (RHV) and internal resistor (RLS), as shown in Figure 18. The internal line sensing circuit detects the real RMS value of the line voltage using sampling circuit and peak detection circuit. ...
... The HV pin can detect the AC line voltage using a switched voltage divider that consists of external resistor (RHV) and internal resistor (RLS), as shown in Figure 18. The internal line sensing circuit detects the real RMS value of the line voltage using sampling circuit and peak detection circuit. ...
here
... • Insulation dielectric heating in addition to temperature rise due to copper loss and core loss • Increased dielectric loss due to the switching frequency (currently around 2 kHz) and the harmonics from fast risetime (100’s of kHz) • loss tends to increase with frequency • In addition, for epoxy mi ...
... • Insulation dielectric heating in addition to temperature rise due to copper loss and core loss • Increased dielectric loss due to the switching frequency (currently around 2 kHz) and the harmonics from fast risetime (100’s of kHz) • loss tends to increase with frequency • In addition, for epoxy mi ...
MS Word
... You are given an NMOS amplifier with drain load resistor RD = 20 k. The DC voltage (VRD) appearing across resistor RD = 1.5 volts with an applied gate-to-source voltage (VGS) of 0.7 volt. Small-signal AC measurements ) give a voltage gain Av = -10 V/V. (a) Find the threshold voltage Vt of the N-cha ...
... You are given an NMOS amplifier with drain load resistor RD = 20 k. The DC voltage (VRD) appearing across resistor RD = 1.5 volts with an applied gate-to-source voltage (VGS) of 0.7 volt. Small-signal AC measurements ) give a voltage gain Av = -10 V/V. (a) Find the threshold voltage Vt of the N-cha ...
arduino based power factor correction
... circuit. The ZCD circuit then gives zero crossings for voltage signal. For power line current we use noninvasive current transformer to step down it to lower level. This signal is then applied to ZCD to get its zero crossing. From these to ZCD outputs we know the phase difference between voltage and ...
... circuit. The ZCD circuit then gives zero crossings for voltage signal. For power line current we use noninvasive current transformer to step down it to lower level. This signal is then applied to ZCD to get its zero crossing. From these to ZCD outputs we know the phase difference between voltage and ...
High-Voltage Insulated DC/DC Power Supply ISO3116I
... The output voltage is not regulated and tracks the input voltage. The typical output voltage is 16.4V for an input voltage of 15V and a load current of 160mA. Input voltages higher than those specified can lead to destruction of the DC/DC converter or the gate driver. Distance between input and outp ...
... The output voltage is not regulated and tracks the input voltage. The typical output voltage is 16.4V for an input voltage of 15V and a load current of 160mA. Input voltages higher than those specified can lead to destruction of the DC/DC converter or the gate driver. Distance between input and outp ...
D.J. Perreault, R.L. Selders, and J.G. Kassakian, Frequency-Based Current-Sharing Techniques for Paralleled Power Converters, IEEE Transactions on Power Electronics , Vol. 13, No. 4, July 1998, pp. 626-634.
... measure the aggregate switching harmonics at the output and use the information in the switching harmonics to achieve load balance with the other converter cells. This approach has the benefit that no additional ripple is injected into the output to encode current sharing information, and the inform ...
... measure the aggregate switching harmonics at the output and use the information in the switching harmonics to achieve load balance with the other converter cells. This approach has the benefit that no additional ripple is injected into the output to encode current sharing information, and the inform ...
BDTIC www.BDTIC.com/infineon
... counter, a zero-crossing counter (ZC counter) and a comparator, and an analog circuit including a current measurement unit and a comparator. The switch-on and -off time points are each determined by the digital circuit and the analog circuit, respectively. As input information for the switch-on dete ...
... counter, a zero-crossing counter (ZC counter) and a comparator, and an analog circuit including a current measurement unit and a comparator. The switch-on and -off time points are each determined by the digital circuit and the analog circuit, respectively. As input information for the switch-on dete ...
ZOE-MLC1 Product Brief
... usually a smart meter) to control high power loads (up to 240VAC at 30Amps) via demand response or price events from the electric utility, or On/Off commands from a local gateway. The device measures the power delivered and other parameters such as power factor, frequency, current and voltage and re ...
... usually a smart meter) to control high power loads (up to 240VAC at 30Amps) via demand response or price events from the electric utility, or On/Off commands from a local gateway. The device measures the power delivered and other parameters such as power factor, frequency, current and voltage and re ...
A Guide to Specifying Encapsulated Transformers
... A design appearing to require 1VA may only require that capacity for short bursts of time allowing size and cost saving by de-rating to possibly a 0.6VA transformer design provided the duration of the increased current spikes doesn’t saturate the core. Line Regulation (variation in the output volta ...
... A design appearing to require 1VA may only require that capacity for short bursts of time allowing size and cost saving by de-rating to possibly a 0.6VA transformer design provided the duration of the increased current spikes doesn’t saturate the core. Line Regulation (variation in the output volta ...
Electrical Wiring Electric shock and electrocution
... switching circuits. The interconnection wiring acts like an antenna, and small radio frequency (RF) currents are induced in the wiring by the electromagnetic fields. Since the receiving device is observing the voltage between the single signal wire and the ground wire, these RF currents can cause a ...
... switching circuits. The interconnection wiring acts like an antenna, and small radio frequency (RF) currents are induced in the wiring by the electromagnetic fields. Since the receiving device is observing the voltage between the single signal wire and the ground wire, these RF currents can cause a ...
Laboratory Exercise 12 – Process Control Applications
... When this is used in your house, it is the 110 VAC line power that is being switched on and off, so you need a really beefy switch called a triac. Set up a comparator circuit like the ones that you used in Lab 5 and Lab 9. Either use an op amp, like a 741 or 3140, or a comparator, like the 311, as ...
... When this is used in your house, it is the 110 VAC line power that is being switched on and off, so you need a really beefy switch called a triac. Set up a comparator circuit like the ones that you used in Lab 5 and Lab 9. Either use an op amp, like a 741 or 3140, or a comparator, like the 311, as ...
03 Circuit Analyze, Signals, Timing Diagrams
... Above is a timing diagram for some clock by name C1 or Clock 1. Clock is a periodic signal. Clock usually hasn’t beginning or end. It exists all the time while power is on and is used for synchronization of circuits. For the period when the signal has high level sometime we say “The signal exi ...
... Above is a timing diagram for some clock by name C1 or Clock 1. Clock is a periodic signal. Clock usually hasn’t beginning or end. It exists all the time while power is on and is used for synchronization of circuits. For the period when the signal has high level sometime we say “The signal exi ...
Limitations of Slew Rate on the REFIN Pin of the
... any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI wa ...
... any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI wa ...
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.