Switching Power Supply Design, 3rd Ed. by Taylor Morey, Abraham Pressman, Keith Billings
By Taylor Morey, Abraham Pressman, Keith Billings
The World's no 1 consultant to strength offer layout Now Updated!Recognized world wide because the definitive advisor to strength provide layout for over 25 years, Switching energy provide layout has been up to date to hide the newest techniques in know-how, fabrics, and elements. This 3rd variation provides the elemental rules of the main time-honored topologies, giving you the fundamental info required to layout state-of-the-art strength offers. utilizing an instructional, how-and-why process, this professional source is full of layout examples, equations, and charts. The 3rd variation of Switching strength provide layout features:Designs for plenty of of the main necessary switching energy provide topologiesThe center ideas required to resolve day by day layout problemsA robust concentrate on the basic fundamentals of transformer and magnetics layout New to this variation: a whole bankruptcy on choke layout and optimal force stipulations for contemporary speedy IGBTsGet every little thing you must layout an entire Switching energy Supply:Fundamental Switching Regulators * Push-Pull and ahead Converter Topologies * part- and Full-Bridge Converter Topologies * Flyback Converter Topologies * Current-Mode and Current-Fed Topologies * Miscellaneous Topologies * Transformer and Magnetics layout * High-Frequency Choke layout * optimal force stipulations for Bipolar strength Transistors, MOSFETs, energy Transistors, and IGBTs * force Circuits for Magnetic Amplifiers * Postregulators * Turn-on, Turn-off Switching Losses and occasional Loss Snubbers * Feedback-Loop Stabilization * Resonant Converter Waveforms * energy issue and gear issue Correction * High-Frequency energy assets for Fluorescent Lamps, and Low-Input-Voltage Regulators for machine desktops and transportable gear
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LTC High-Efﬁciency, High-Power Buck Regulators . . . . . . . . . . . . . . . . . 1 LT1376 High-Frequency, Low Switch Drop Buck Regulator . . . . . . . 2 LTC1148 High-Efﬁciency Buck with External MOSFET Switches . . 3 LTC1148 Block Diagram . . . . . . 4 LTC1148 Line and Load Regulation . . . . . . . . . . . . . 5 LTC1148 Peak Current and Output Inductor Selection . . . . . . . . . 6 LTC1148 Burst-Mode Operation for Low Output Current .
When Q1 turns fully “on,” the supply voltage Vdc will appear across the diode D1 at point V1. Since the output voltage Vo is less than Vdc , the inductor L o will have a voltage impressed across it of (Vdc − Vo ). With a constant voltage across the inductor, its current rises linearly at a rate given by di/dt = (Vdc − Vo )/L o . ) When Q1 turns “off,” the voltage at point V1 is driven toward zero because it is not possible to change the previously established inductor current instantaneously. Hence the voltage polarity across L o immediately reverses, trying to maintain the previous current.
3 Inductor (Choke) Design In the preceding example, continuous mode operation is required, so the current must not reach zero for the full range of load currents. Thus the inductor must support a DC current component and should be designed as a choke. Well-designed chokes have a low, but relatively constant, inductance under AC voltage stress and DC bias conditions.