Nxp USA, Inc.

Ondrej Pauk

John Ryan Goodfellow

Percy Edgard Neyra

John M Pigott

Kyle James Wollschlager

Raviraj Dattatraya Vader

A method for dynamic enhancement of loop response upon recovery from fault conditions includes detecting a fault condition in response to a programmed output voltage of a Pulse Width Modulation (PWM) converter decreasing below an input voltage of the PWM converter. A peak voltage is sampled at the end of at least one of a plurality of clock cycles of the PWM converter in response to detecting the fault condition, wherein the peak voltage is proportional to a sensed current conducted through a transistor. An error output of an error amplifier is preset to an error value determined by the peak voltage. A PWM driver is controlled with the error value to drive the transistor. An output load is charged to the programmed output voltage with the transistor in response to the input voltage increasing above the programmed output voltage.

Dynamic enhancement of loop response upon recovery from fault conditions

A method for fast-enabling a current source includes conducting a first current through a first branch including a first transistor connected in series with a first switch, in response to enabling the first switch with an enable signal. A first charge is removed from a bias rail with a first capacitance between a first gate and a first source of the first transistor. A second current is conducted through a second branch including a second switch connected in series with a second transistor, in response to enabling the second switch with the enable signal. A second charge is added to the bias rail with a second capacitance between a second drain and a second gate of the second transistor, wherein the first gate and the second gate are connected to the bias rail and biased by the mirror reference voltage.

Fast-enable current source

Embodiments of a switched-mode power supply and a method for operating a switched-mode power supply involve synchronizing a phase and frequency of an asynchronous controller of the switched-mode power supply with a clock signal of a synchronous controller of the switched-mode power supply while the asynchronous controller is in control of a power stage of the switched-mode power supply, concurrent with synchronizing the phase and frequency of the asynchronous controller with the clock signal of the synchronous controller, presetting a state variable of the synchronous controller while the asynchronous controller is in control of the power stage of the switched-mode power supply, and switching control of the power stage from the asynchronous controller to the synchronous controller after the phase and frequency of the asynchronous controller are synchronized with the clock signal of the synchronous controller and after the state variable of the synchronous controller is preset.

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Chandler, AZ, United States of America

Ondrej Pauk