Infineon Technologies Austria Ag

Charles P Amirault

Keng Chen

James R Garrett

Robert T Carroll

Danny Clavette

Venkat Sreenivas

James Garret

Min Chen

A power supply includes a storage component to store an output current value representative of a magnitude of output current supplied by an output voltage of a power converter to power a load. The power supply further includes an offset reference generator and a controller. The offset reference generator produces an offset reference signal, the output current value being offset by the offset reference signal. The controller controls generation of the output voltage of the power converter as a function of the offset output current value with respect to a threshold signal (value). Additionally, the controller is configured to detect a startup mode of a power converter operative to convert an input voltage into an output voltage. During the startup mode, the controller: i) produces a threshold signal having a magnitude that varies over time, and ii) controls operation of switches in the power converter as a function of the threshold signal while the power converter is operated in a diode emulation mode. Implementation of the startup mode monotonically increases a magnitude of the output voltage without dips.

Power supply and emulated current mode to control generation of an output voltage

A method of implementing a load line in a power converter includes: adjusting a target voltage used to regulate an output voltage of the power converter, based on sensed load current information that has delay between updates; and responsive to detecting a load current transient and before the next update to the sensed load current information becomes available, adjusting the target voltage based on blind load current information. A corresponding controller, power converter and electronic system are also described.

Load line regulation for power converters

An apparatus comprises an emulator and a corresponding compensator. During operation, the emulator produces, at different instants of time, an emulated output current value representative of an amount of current supplied from an output voltage to a load. In general, the compensator provides selective compensation to the emulated output current value over time. For example, for a first time duration, compensation adjustments from the compensator are used to modify the emulated output current value. For a second duration of time, compensation adjustments from the compensator are not used to modify the emulated output current value. Disabling or discontinuing application of adjustments (such as based on the actual measured output current) during the second time duration (such as during a respective transient condition) provides more accurate and timely generation of a respective emulated output current value.

Current emulation in a power supply

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Nashua, MA, United States of America

Charles P Amirault