D.J. Perreault, J. Hu, J.M. Rivas, Y. Han, O. Leitermann, R.C.N. Pilawa-Podgurski, A. Sagneri, and C.R. Sullivan, Opportunities and Challenges in Very High Frequency Power Conversion, 2009 IEEE Applied Power Electronics conference , Feb. 2009, pp. 1-14
... temperature rise lies below the constant loss budget curve at all frequencies. In other possible designs, however (e.g., designs in which a lower Q requirement is imposed), both of these constraints would be important, with an allowed design being on the maximum of the two curves. As shown in Fig. 1 ...
... temperature rise lies below the constant loss budget curve at all frequencies. In other possible designs, however (e.g., designs in which a lower Q requirement is imposed), both of these constraints would be important, with an allowed design being on the maximum of the two curves. As shown in Fig. 1 ...
MAX1561/MAX1599 High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs General Description
... 0.3µA by powering down the entire IC except for the CTRL voltage-detection circuitry. CCOMP is discharged during shutdown, allowing the device to reinitiate softstart when it is enabled. Although the internal N-channel MOSFET does not switch in shutdown, there is still a DC current path between the ...
... 0.3µA by powering down the entire IC except for the CTRL voltage-detection circuitry. CCOMP is discharged during shutdown, allowing the device to reinitiate softstart when it is enabled. Although the internal N-channel MOSFET does not switch in shutdown, there is still a DC current path between the ...
Engineering Circuit Analysis, Sixth Edition
... p. 132: In Figure 5.47, the current through the 20- resistor should be labelled I1 (not i1), for the sake of consistency. p. 134: In Fig. 5.55, a DC voltage source symbol should be used for the 2-V source. (Delete the “~”). p. 139: The circuit discussed in exercise 45 is actually a common-collector ...
... p. 132: In Figure 5.47, the current through the 20- resistor should be labelled I1 (not i1), for the sake of consistency. p. 134: In Fig. 5.55, a DC voltage source symbol should be used for the 2-V source. (Delete the “~”). p. 139: The circuit discussed in exercise 45 is actually a common-collector ...
LM2675 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regulator
... 260 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Because of its very high efficiency ( > 90%), the copper traces on the printed circuit board are the only heat sinking needed. A family of standard inductors for use with the L ...
... 260 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Because of its very high efficiency ( > 90%), the copper traces on the printed circuit board are the only heat sinking needed. A family of standard inductors for use with the L ...
High-efficiency, high step-up DC-DC converters
... to 0.5. The basic idea behind this group of circuits is to store sufficient energy in the inductors by assembling the input and output voltage sources so that they are in series during switch-on time. However, having the output voltage source charge the inductor introduces high levels of circulating ...
... to 0.5. The basic idea behind this group of circuits is to store sufficient energy in the inductors by assembling the input and output voltage sources so that they are in series during switch-on time. However, having the output voltage source charge the inductor introduces high levels of circulating ...
Designing Non-Invert Buck-Boost (Zeta) Cnvrts
... sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to th ...
... sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to th ...
Maintain Efficiency - Longo Electrical
... Stator core losses may be changed due to the winding removal process. Most often the failed windings are “pyrolyzed” to facilitate removal, that is, heated to the point where insulation physically breaks down. This process breaks down the chemical bonds that act to glue the winding wires to each oth ...
... Stator core losses may be changed due to the winding removal process. Most often the failed windings are “pyrolyzed” to facilitate removal, that is, heated to the point where insulation physically breaks down. This process breaks down the chemical bonds that act to glue the winding wires to each oth ...
1. General - Saunalahti.fi
... The HTC complete schematic diagram can be found in Figure 8. The components inside the dotted box are assembled on a printed circuit board. Main feed 2 (MF2) supplies transformers T1 and T2 through line filter LF1. C5, D1 and D2 form a voltage doubler that rises the output of T1 from 2 to 4 kV AC. C ...
... The HTC complete schematic diagram can be found in Figure 8. The components inside the dotted box are assembled on a printed circuit board. Main feed 2 (MF2) supplies transformers T1 and T2 through line filter LF1. C5, D1 and D2 form a voltage doubler that rises the output of T1 from 2 to 4 kV AC. C ...
Document
... The count rates, N, are measured for different thicknesses, d, of absorber plates. The results are shown in Figure 10.2, with curve A corresponding to the measurements using aluminium absorber plates while curve B corresponds to those using lead absorber plates. ...
... The count rates, N, are measured for different thicknesses, d, of absorber plates. The results are shown in Figure 10.2, with curve A corresponding to the measurements using aluminium absorber plates while curve B corresponds to those using lead absorber plates. ...
Transient simulation and analysis of a three-phase five-limb step
... inductances are not visualized in the Fig.2~. The linear inductances of the transformer model include three leakage inductances, which are assumed to have the same value and can be computed or determined by the short circuit test, and seven inductances associated to the air flux tubes in parallel to ...
... inductances are not visualized in the Fig.2~. The linear inductances of the transformer model include three leakage inductances, which are assumed to have the same value and can be computed or determined by the short circuit test, and seven inductances associated to the air flux tubes in parallel to ...
MAX1951A 1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC General Description
... between 0.8V and VIN. Connect FB to output for 0.8V output. To set the output voltage of the MAX1951A to a voltage greater than VFB (0.8V typ), connect the output to FB and GND using a resistive divider, as shown in Figure 2. Choose R2 between 2kΩ and 20kΩ, and set R3 according to the following equa ...
... between 0.8V and VIN. Connect FB to output for 0.8V output. To set the output voltage of the MAX1951A to a voltage greater than VFB (0.8V typ), connect the output to FB and GND using a resistive divider, as shown in Figure 2. Choose R2 between 2kΩ and 20kΩ, and set R3 according to the following equa ...
Inductor
An inductor, also called a coil or reactor, is a passive two-terminal electrical component which resists changes in electric current passing through it. It consists of a conductor such as a wire, usually wound into a coil. When a current flows through it, energy is stored temporarily in a magnetic field in the coil. When the current flowing through an inductor changes, the time-varying magnetic field induces a voltage in the conductor, according to Faraday’s law of electromagnetic induction, According to Lenz's law the direction of induced e.m.f is always such that it opposes the change in current that created it. As a result, inductors always oppose a change in current, in the same way that a flywheel oppose a change in rotational velocity. Care should be taken not to confuse this with the resistance provided by a resistor.An inductor is characterized by its inductance, the ratio of the voltage to the rate of change of current, which has units of henries (H). Inductors have values that typically range from 1 µH (10−6H) to 1 H. Many inductors have a magnetic core made of iron or ferrite inside the coil, which serves to increase the magnetic field and thus the inductance. Along with capacitors and resistors, inductors are one of the three passive linear circuit elements that make up electric circuits. Inductors are widely used in alternating current (AC) electronic equipment, particularly in radio equipment. They are used to block AC while allowing DC to pass; inductors designed for this purpose are called chokes. They are also used in electronic filters to separate signals of different frequencies, and in combination with capacitors to make tuned circuits, used to tune radio and TV receivers.