POWER SYSTEMS TECHNOLOGIES, LTD. Patent applications |
Patent application number | Title | Published |
20150198634 | CONTROLLER FOR USE WITH A POWER CONVERTER AND METHOD OF OPERATING THE SAME - A controller for use with a power converter and method of operating the same. In one embodiment, the controller includes a transformer voltage sensing circuit configured to produce a preliminary bus voltage sample. The controller also includes a frequency correction circuit coupled to the transformer voltage sensing circuit and configured to correct the preliminary bus voltage sample to produce an estimate of an internal bus voltage of the power converter. | 07-16-2015 |
20150138857 | METHOD FOR ESTIMATING POWER OF A POWER CONVERTER - A controller for estimating a power of a power converter and method of estimating the same has been introduced herein. In one embodiment, the controller includes an analog/digital converter configured to provide samples of a rectified voltage waveform corresponding to a rectified sensed voltage of the power converter. The controller also includes a processor configured to estimate a minimum value of the rectified voltage waveform in accordance with the samples and remove an offset from the rectified voltage waveform to obtain an unbiased rectified voltage waveform in accordance with the estimate of the minimum value. The controller is also configured to obtain an unbiased rectified current waveform corresponding to sensed current of the power converter and provide an average power of the power converter. | 05-21-2015 |
20150098254 | CONTROLLER FOR USE WITH A POWER CONVERTER AND METHOD OF OPERATING THE SAME - A controller for use with a power converter and method of operating the same. In one embodiment, the controller includes a gate drive terminal configured to provide a gate drive signal to enable conductivity of a power switch during a first portion of a switching interval and to disable conductivity of the power switch during a second portion of the switching interval. The controller also includes a current sense terminal configured to receive a power switch signal indicative of a current in the power switch during the first portion of the switching interval, and receive a control signal to operate the power converter or provide a status signal indicative of an operating condition of the power converter during the second portion of the switching interval. | 04-09-2015 |
20140301111 | CONTROL SYSTEM FOR A POWER CONVERTER AND METHOD OF OPERATING THE SAME - A power converter employing a control system configured to make multiple functional use of a circuit node therein and method of operating the same. In one embodiment, the power converter includes a power train including at least one power switch. The power converter also includes a control system including an opto-isolator circuit, including a resistor, configured to receive an output signal from the power converter and provide a feedback signal to a feedback node for the control system to provide a switch control signal for the at least one power switch. The control system also includes a current source configured to produce multiple voltage levels at the feedback node in accordance with the resistor, thereby enabling multiple functional uses of the feedback node. | 10-09-2014 |
20140254215 | CONTROLLER FOR A POWER CONVERTER AND METHOD OF OPERATING THE SAME - A control system for a power converter with reduced power dissipation and method of operating the same. In one embodiment, the control system includes a first controller coupled to a primary winding of a transformer and configured to control a duty cycle of a power switch to regulate an output characteristic of the power converter. The control system also includes a second controller configured to provide a signal to one of a secondary winding of the transformer and a circuit element spanning an isolation boundary of the transformer in response to a dynamic change of the output characteristic to trigger the first controller to initiate the duty cycle for the power switch. | 09-11-2014 |
20140169049 | Controller for a Power Converter and Method of Operating the Same - A controller for a power converter and method of operating the same. In one embodiment, the controller includes a current-sense device couplable in series with switched terminals of power switches of interleaved switching regulators and configured to produce a current-sense signal. The controller also includes an error amplifier configured to produce an error signal as a function of a characteristic of the power converter. The controller also includes a duty-cycle controller configured to sample the current-sense signal at mid-points of duty cycles of the power switches and regulate the characteristic as a function of the error signal and the current-sense signal. | 06-19-2014 |
20140091720 | Controller for Use with a Power Converter and Method of Operating the Same - A controller for use with a power converter and method of operating the same. In one embodiment, the controller includes a light emitting diode string controller configured to receive a dimmer signal and control a level of current in a light emitting diode string in response to the dimmer signal. The controller also includes a power converter controller configured to receive the dimmer signal and control an output current of the power converter that is a multiple of the level of current in the light emitting diode string. | 04-03-2014 |
20140091718 | Power Converter with an Inductor-Inductor-Capacitor Stage and Method of Operating the Same - A power converter including an inductor-inductor-capacitor stage and method of operating the same. In one embodiment, the power converter includes an inductor-inductor-capacitor (LLC) stage coupled to an input of said power converter. The power converter also includes a controller configured to control a switching frequency of the LLC stage as a function of an input voltage of the power converter. | 04-03-2014 |
20140016370 | Magnetic Device and Power Converter Employing the Same - A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment. | 01-16-2014 |
20140016369 | Magnetic Device and Power Converter Employing the Same - A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment. | 01-16-2014 |
20140016368 | Magnetic Device and Power Converter Employing the Same - A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment. | 01-16-2014 |
20140016367 | Magnetic Device and Power Converter Employing the Same - A magnetic device and power converter employing the same. In one embodiment, the magnetic device includes a first L-core segment including a first leg and a second leg extending therefrom, and an opposing second L-core segment including a first leg and a second leg extending therefrom. The magnetic device also includes a winding formed around at least one of the first leg and the second leg of the first L-core segment or the second L-core segment. | 01-16-2014 |
20140009970 | Controller for a Power Converter and Method of Operating the Same - A burst mode controller for a power converter and method of operating the same. In one embodiment, the burst mode controller includes a burst mode initiate circuit configured to initiate a burst mode of operation when a signal representing an output voltage of the power converter crosses a first burst threshold level. The burst mode controller also includes a voltage elevate circuit configured to provide a voltage elevate signal to raise the output voltage if a time window expires before the signal representing the output voltage of the power converter crosses a second burst threshold level. | 01-09-2014 |
20130194826 | Controller for a Switch and Method of Operating the Same - A controller for a switch and a method of operating the same. In one embodiment, the controller is configured to measure a voltage of a control terminal of the switch and select a first mode of operation if the voltage of the control terminal is greater than a threshold voltage, and a second mode of operation if the voltage of the control terminal is less than the threshold voltage. | 08-01-2013 |
20130016535 | Controller for a Power Converter and Method of Operating the Same - A control system for a power converter with reduced power dissipation at light loads and method of operating the same. In one embodiment, the control system includes a first controller configured to control a duty cycle of a power switch to regulate an output characteristic of the power converter. The control system also includes a second controller configured to provide a signal in response to a dynamic change of the output characteristic to the first controller to initiate the duty cycle for the power switch. | 01-17-2013 |
20120294048 | Start-Up Circuit for a Power Adapter - A start-up circuit for a power adapter and method of operating the same. In one embodiment, the power adapter includes a start-up circuit configured to provide an initial bias voltage for the power adapter. The power adapter also includes a crowbar circuit configured to turn on the start-up circuit upon loss of an ac mains voltage supplied to the power adapter. | 11-22-2012 |