Texas Instruments Corporation

Koninklijke Philips Corporation N.v.

Cirrus Logic Inc.

Chris Michael Franklin

John L Melanson

Michael Allan Kost

Zhaohui He

Yanhui Xie

Brent Alan McDonald

Zhong Ye

Shamim A Choudhury

John Christian Vogt

A power distribution system includes controller of a switching power converter to control the switching power converter and determine one or more switching power converter control parameters. In at least one embodiment, the switching power converter utilizes a transformer to transfer energy from a primary-side of the transformer to a secondary-side of the transformer. In at least one embodiment, the switching power converter control parameters includes a secondary-side conduction time delay that represents a time delay between when the primary-side ceases conducting a primary-side current and the secondary-side begins to conduct a secondary-side current. In at least one embodiment, determining and accounting for this secondary-side conduction time delay increases the prediction accuracy of the secondary-side current value and accurate delivery of energy to a load when the controller does not directly sense the secondary-side current provided to the load.

Utilizing secondary-side conduction time parameters of a switching power converter to provide energy to a load

In a first aspect, a control circuit is provided for use with a switch-mode power stage that provides an output voltage signal and an output current signal at an output power. The switch-mode power stage has a nominal voltage, a nominal current, a maximum current, an output power and a maximum power. The control circuit includes a voltage control loop and a current control loop, and the control circuit uses the voltage control loop to provide voltage mode control if the output current signal is greater than or equal to the nominal current and less than the maximum current, wherein the output power is substantially constant. Numerous other aspects are also provided.

Methods and apparatus for constant power/current control for switch-mode power converters

A digital control circuit is provided for use with a switch-mode power converter that receives an input signal at a first input node and a control signal at a second input node, and that provides an output signal at a first output node and a current signal at a second output node. The digital control circuit generates a programmable current reference signal based on a difference between the output signal and a voltage reference signal, calculates a time instant when the current signal substantially equals the programmable reference current signal, and generates the control signal based on the calculated time instant.

Digital peak current mode control for switch-mode power converters

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Austin, TX, United States of America

Chris Michael Franklin