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MAX8739 TFT, LCD, DC-DC Converter with Operational Amplifiers General Description
MAX8739 TFT, LCD, DC-DC Converter with Operational Amplifiers General Description

... the MAX8739 is from 1.8V to 5.5V. The device also includes a logic-controlled, high-voltage switch with adjustable delay. The step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (600kHz/1.2MHz) currentmode regulator with an ...
NHMFL Interphase Transformer _2_
NHMFL Interphase Transformer _2_

... The National High Magnetic Field Laboratory (NHMFL) has installed four 24-pulse rectifiers, also called power supplies. (Details of the power supply design can be found in a paper with the title “Design and Operation of a 40 MW Highly Stabilized Power Supply”. A copy of the paper is attached to thes ...


... prototypes was minimized in predicting the coil behavior. A coil design process was developed that begins with only dimensions, material properties, and topology. Then the non-linear magnetic and linear electrostatic interactions among the windings and laminations of the coil were modeled using elec ...
MAX17083 Low-Voltage, Internal Switch, Step-Down Regulator General Description
MAX17083 Low-Voltage, Internal Switch, Step-Down Regulator General Description

... voltage-error signal with respect to the reference voltage, the current-sense signal, and the slope compensation ramp (Figure 2). The MAX17083 uses a directsumming configuration, approaching ideal cycle-tocycle control over the output voltage without a traditional error amplifier and the phase shift ...
ATF-55143 WCDMA APP
ATF-55143 WCDMA APP

PDF - 1.1MB - MIT OpenCourseWare
PDF - 1.1MB - MIT OpenCourseWare

... has decayed to zero so that a constant magnetic flux passes through loop 2 due to the current in loop 1. When the switch is later opened so that the current in loop 1 goes to zero, the second loop tries to maintain the constant flux already present by inducing a current flow in the same direction as ...
TPS62684 - Texas Instruments
TPS62684 - Texas Instruments

... Operating beyond the continuous average output current of 890mA may decrease the lifetime. See the Thermal, Lifetime Information and Maximum Output Current section. Due to the dc bias effect of ceramic capacitors, the effective capacitance is lower than the nominal value when a voltage is applied. T ...
MAX1637 Miniature, Low-Voltage, Precision Step-Down Controller General Description
MAX1637 Miniature, Low-Voltage, Precision Step-Down Controller General Description

... (SMPS) controller designed primarily for buck-topology regulators in battery-powered applications where high efficiency and low quiescent supply current are critical. Light-load efficiency is enhanced by automatic idlemode operation—a variable-frequency, pulse-skipping mode that reduces transition a ...
1783 Basic AC Circuits
1783 Basic AC Circuits

... Partial Mastery: The student demonstrates basic but inconsistent performance of fundamental knowledge and skills characterized by errors and/or omissions. Performance needs further development and supervision. ...
Basic Motor Theory
Basic Motor Theory

... If, however, the direction of currents in the electromagnetic coils was suddenly reversed, thereby reversing the polarity of the two coils, then the poles would again be opposites and repel each other. (Figure 5-c). The movable permanent magnet would then continue to rotate. If the current direction ...
A transformer is an electrical device that transfers energy from one
A transformer is an electrical device that transfers energy from one

... current heating of the core. The thin laminations are used to reduce the eddy currents, and the insulation is used to keep the laminations from acting as a solid piece of steel. The thinner the laminations, the lower the eddy currents, and the lower the losses. Very thin laminations are generally us ...
Basic Electric Transformers
Basic Electric Transformers

... induced voltage in the iron. And these induced voltages would cause induced currents to flow in the iron. And here lies the main problem. Iron has a comparatively low resistance (more than copper, but much less than glass, for example). Thus these induced currents, with very little resistance to lim ...
LTC3400-1 - 600mA, 1.2MHz Micropower Synchronous Boost
LTC3400-1 - 600mA, 1.2MHz Micropower Synchronous Boost

MAX2690 Low-Noise, 2.5GHz Downconverter Mixer _______________General Description
MAX2690 Low-Noise, 2.5GHz Downconverter Mixer _______________General Description

... IF Output The IFOUT+ and IFOUT- pins form the MAX2690’s differential open-collector IF output. The IF output is coupled to the load using shunt inductors to VCC and series capacitors to the load. Most applications use a resistive termination of 500Ω (typical) resistors in parallel with the pull-up i ...
Modeling and design of a current mode control boost converter
Modeling and design of a current mode control boost converter

Diapositive 1
Diapositive 1

... Ferromagnetic material for low temperature are under investigation (in collaboration with LPC2E) A low noise, low frequency ASIC preamplifier adapted for LF1 [0.1Hz-4kHz] part of EJSM search coil magnetometer has been designed, fabricated, tested (electrical & radiations tests) and validated. A seco ...
MAX685 Dual-Output (Positive and Negative), DC-DC Converter for CCD and LCD General Description
MAX685 Dual-Output (Positive and Negative), DC-DC Converter for CCD and LCD General Description

... _______________Detailed Description The MAX685 DC-DC converter accepts an input voltage between +2.7V and +5.5V and generates both a positive and negative voltage, using a single inductor (Figure 1). It alternates between acting as a step-up converter and as an inverting converter on a cycle-by-cycl ...
Soft Magnetic Materials for Audio Transformers
Soft Magnetic Materials for Audio Transformers

Behaviour of transformers under DC/GIC excitation
Behaviour of transformers under DC/GIC excitation

... return mode (GRM) DC currents may impact the substation design. Some utilities have experimented use of Neutral DC Current Blocking Devices to limit the harmful effect of these currents [7]. More generally, users located in areas where geomagnetically induced currents (GIC) may occur often specify t ...
1. PDF dokument
1. PDF dokument

THE ISOTRON REVEALED - PART 2 By Dave Cuthbert
THE ISOTRON REVEALED - PART 2 By Dave Cuthbert

Document
Document

Single Phase Transformer© Nafees Ahmed  By
Single Phase Transformer© Nafees Ahmed By

...  Condition for zero voltage regulation: From equation (1) it is clear that voltage regulation will be zero for leading power factor only. So condition of zero voltage regulation I 2 R02Cos  I 2 R02Sin ...
Lab 17 - College of San Mateo
Lab 17 - College of San Mateo

... If the coil is part of a complete circuit, as when the two leads are connected together or when they are connected to an electrical meter, as in this experiment, then an induced current exists as well as an induced emf. The magnitude of the current at any instant is the ratio of the emf to the total ...
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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.
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