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Self-driven circuit for synchronous rectifier DC/DC converter
(United States Patent and Trademark Office, 2006-03-21)
A power converter having a primary circuit (e.g. full bridge) and a secondary circuit (e.g. current doubler) has switches in the secondary circuit that are controlled by a drive circuit. The drive circuit is connected to ...
Quasi-resonant DC-DC converters with reduced body diode loss
(United States Patent and Trademark Office, 2006-01-24)
Buck converters having a resonant inductor Lr, resonant capacitor Cr, and synchronous switch Q3 that together provide reduced switching loss and soft switching. In operation, the resonant inductor Lr is charged during a ...
Two-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases
(United States Patent and Trademark Office, 2006-07-04)
A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second ...
Adaptive bus voltage positioning for two-stage voltage regulators
(United States Patent and Trademark Office, 2007-01-09)
Alteration of voltage input to a voltage regulator output stage from a V<sub>bus </sub>regulator stage in a two-stage voltage regulator provides optimal V<sub>bus </sub>voltage placement for a wide range of current loads ...
Hybrid filter for high slew rate output current application
(United States Patent and Trademark Office, 2009-07-14)
An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow ...
Hybrid filter for high slew rate output current application
(United States Patent and Trademark Office, 2009-09-01)
An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow ...
Hybrid control methods for digital pulse width modulator (DPWM)
(United States Patent and Trademark Office, 2009-08-04)
A digital pulse width modulator leverages clock frequency to achieve very fine duty cycle resolution by using a constant number of time slots for each state of a pulse signal and varying the number of time slots in a ...
Multiphase voltage regulator having coupled inductors with reduced winding resistance
(United States Patent and Trademark Office, 2007-04-03)
A multiple phase buck converter or boost converter, or buck-boost converter has an inductor in each phase. A magnetic core with a unique woven topology provides inverse coupling between the inductors. The inductors can ...
Power converters having capacitor resonant with transformer leakage inductance
(United States Patent and Trademark Office, 2007-03-27)
Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant ...
Self-driven scheme for synchronous rectifier having no body diode
(United States Patent and Trademark Office, 2007-09-04)
A voltage converter uses a component such as a JFET or four-terminal power MOSFET having no body diode and exhibiting no body diode conduction characteristic as a synchronous rectifier to reduce switching losses and body ...