| Patent application number | Description | Published |
|---|
| 20080204160 | UNIVERSAL AND FAULT-TOLERANT MULTIPHASE DIGITAL PWM CONTROLLER FOR HIGH-FREQUENCY DC-DC CONVERTERS - A multiphase hybrid digital pulse width modulator can comprise a counter that is selectable between at least two different numbers of states to indicate a first portion of a switching period. Unclocked logic can indicate a second portion of the switching period. The unclocked logic can include a delay line. | 08-28-2008 |
| 20080204290 | PROGRAMMABLE ANALOG-TO-DIGITAL CONVERTER FOR LOW-POWER DC-DC SMPS - A voltage-to-time based windowed analog-to-digital converter (ADC) can have programmable reference voltage, conversion time, and accuracy of voltage regulation. The ADC can be fully implemented on a small silicon area and is suitable for implementation in various integrated digital controllers for high-frequency low-power switch-mode power supplies (SMPS). The programmable characteristics can be achieved through the utilization of the inherent averaging effect of the delay line or of the other voltage-to-time conversion structures and through the adjustments of delay cells' propagation times or the effective voltage-to-time conversion ratio in alternative structures. | 08-28-2008 |
| 20080204296 | Wide-input windowed nonlinear analog-to-digital converter for high-frequency digitally controlled SMPS - In embodiments, a new analog-to-digital converter (ADC) architecture can be used with switch-mode power supplies (SMPS) operating at switching frequencies higher than 10 MHz. Analog-to-digital converter embodiments can achieve very low power consumption, fast conversion time, and can be implemented with a simple hardware. Another noteworthy benefit is that certain ADC embodiments feature a non-linear gain characteristic that provides improved load transient response for digital controllers. | 08-28-2008 |
| 20080224756 | DIGITAL PULSE-WIDTH MODULATOR BASED ON NON-SYMMETRIC SELF-OSCILLATING CIRCUIT - A low-power digital pulse-width modulator (DPWM) architecture for high frequency dc-dc switch-mode power supplies (SMPS) is disclosed that is well-suited for integration in power management systems of small handheld devices. The DPWM can operate in a stand-alone mode, without external clock, and can be implemented on a portion of silicon area needed for other DPWM solutions. In addition it has low power consumption and provides a good linearity of the input-to-output characteristic, also not characteristic for other architectures. | 09-18-2008 |
| 20080225938 | DIGITAL PULSE FREQUENCY/PULSE AMPLITUDE (DPFM/DPAM) CONTROLLER FOR LOW-POWER SWITCHING-POWER SUPPLIES - A digital controller for dc-dc switching converters can operate under light load conditions. The controller can be suitable for the use in switch-mode power supplies providing regulated output voltage for handheld devices and other low-power electronics. To create long time intervals, compared to the propagation time of digital logic a DPFM/DPAM can use a ring oscillator with two sets of delay cells and two signals racing around the ring. | 09-18-2008 |
| 20080252280 | CONTINUOUS-TIME DIGITAL CONTROLLER FOR HIGH-FREQUENCY DC-DC CONVERTERS - The present invention is a voltage mode digital controller for low-power high-frequency dc-dc converters that has recovery time approaching physical limitations of a given power stage. It consists of a digital controller with load transient response approaching physical limitations of a given power stage that is suitable for low-power SMPS. In one aspect the invention is a method of utilizing a continuous-time digital signal processor (CT-DSP) for regulation of the operation of switch-mode power supplies. A CT-DSP can be used to instantaneously detect changes of voltage or current during transition periods and immediately perform control action that results in the fastest possible response. The invention may include current program mode controllers for SMPS where the input current is sensed as well as power factor correction rectifiers (PFC), where often input voltage, input current and output voltage are sensed. Upon sensing a deviation in the input voltage the CT-DSP is utilized to apply a switch-mode power operation whereby the controller switches between continuous-time and digital function. | 10-16-2008 |
| 20080303501 | Digital Controller for Dc-Dc Switching Converters for Operation at Ultra-High Constant Switching Frequencies - A digital controller for low-power DC-DC switch mode power supplies (SMPS) suitable for on-chip implementation and use in portable battery-powered systems is provided. The digital controller allows operation at ultra high constant switching frequencies and can be implemented with a simple low-power digital hardware. The digital controller includes a digital pulse width modulator (DPWM), based on a multibit 2 | 12-11-2008 |
| 20090267582 | SELF-TUNING DIGITAL CURRENT ESTIMATOR FOR LOW-POWER SWITCHING CONVERTERS - A switched mode power can use a digital controller to control the switching of the at least one switch of the switched mode power supply. The current through the power inductor can be estimated using a self-tuning digital current estimator. | 10-29-2009 |
| 20100117615 | ESR ZERO ESTIMATION AND AUTO-COMPENSATION IN DIGITALLY CONTROLLED BUCK CONVERTERS - One embodiment of the present invention is a digitally controlled DC-DC converter comprising of a power stage including at least one switch and an output capacitor. A digital controller can control the switching of the at least one switch. The digital controller can include logic to produce an indication related to a zero resulting from the equivalent series resistance (ESR) of the output capacitor and to update the control of the switching of the switch in the power stage based on the estimate. | 05-13-2010 |
| 20100141230 | SELF-TUNING SENSORLESS DIGITAL CURRENT-MODE CONTROLLER WITH ACCURATE CURRENT SHARING FOR MULTIPHASE DC-DC CONVERTERS - Embodiments of the present invention concern a multiphase switch-mode power supply. The multiple phase switch-mode power supply can have at least one switch and a digital controller to control the switching of the at least one switch. During a calibration period, the digital controller can freeze the current of all of the multiple phases except for a phase being calibrated. This can be done by fixing the current reference of the phases except for the phase being calibrated. | 06-10-2010 |
| 20100141349 | UNIVERSAL AND FAULT-TOLERANT MULTIPHASE DIGITAL PWM CONTROLLER FOR HIGH-FREQUENCY DC-DC CONVERTERS - A multiphase hybrid digital pulse width modulator can comprise a counter that is selectable between at least two different numbers of states to indicate a first portion of a switching period. Unclocked logic can indicate a second portion of the switching period. The unclocked logic can include a delay line. | 06-10-2010 |
