Nxp Usa, Inc.

Primarion Corporation

John Ryan Goodfellow

Ondrej Pauk

Percy Edgard Neyra

John M Pigott

Robert T Carroll

Kyle James Wollschlager

Malay Trivedi

Suresh V Golwalkar

Thomas Duffy

Kevin J Cote

Erik A McShane

Kevin Mori

Sampath K V Karikalan

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 switching power regulator and method for recovering the regulator from an unregulated state while preventing overshoot of an output voltage is provided. The regulator includes a dropout detector, a sample-and-hold circuit, a voltage offset circuit and a soft start circuit. When the regulator enters an unregulated state, the dropout detector detects when a pulse width modulation (PWM) signal stops toggling. The sample-and-hold circuit and soft start circuit are used to effectively clamp the voltage at the output of an error amplifier. This causes the output of the error amplifier to regulate around a desired voltage so that the regulator recovers from the unregulated state with little or no overshoot of the output voltage. In another embodiment, a method for recovering from the unregulated state is provided.

Switching power regulator and method for recovering the switching power regulator from an unregulated state

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.

Switching power supply and method for operating a switched-mode power supply

Disclosed is a digitally controlled multi-phase voltage regulator system providing regulated power to electronic components that have variable power requirements. Power is supplied by one or more power integrated circuits (IC) each having a high side power switch controlled by pulse width modulated signals and a low side power switch. The power IC senses voltage at the load and has an on-chip current mirror for generating a current that is a ratio of current delivered to the load. The power IC also has current limiting and on-chip temperature sensing components. The voltage and current information is digitized and provided to a control integrated circuit (IC). The control IC receives this digitized information as well as user provided parameters and, in the regulation mode of operation, provides digitized pulse width modulated control signals to the power IC. In an active transient response mode of operation, the control IC provides signals to turn either the high side switches or low side switches ON. Fault detection circuitry identifies over voltage, under voltage, and excessive temperatures. All communications between the control IC and the power IC are digital providing high bandwidth, optimal control frequency response, noise immunity and efficient active transient response.

Digitally controlled voltage regulator

A semiconductor device package is disclosed which includes inter-digitated input and output bond wires configured to increase the negative mutual inductive coupling between the wires, thus reducing the overall parasitic inductance of the device. In one embodiment, the microelectronic component includes a semiconductor device coupled to a substrate, such as a lead frame, a first set of bond wires connected to the semiconductor device for providing current flow into the semiconductor device, and a second set of bond wires that are in a current loop with the first set of bond wires and are connected to the semiconductor device for providing current flow out of the semiconductor device, wherein the first and second set of bond wires are configured in an inter-digitated pattern to increase the magnitude of mutual inductive coupling between the first and second set of bond wires. In one embodiment, the semiconductor device comprises a single semiconductor chip and the lead frame comprises a Quad Flat No-Lead (QFN) lead frame. Other embodiments include multiple chips and/or multiple lead frames.

Microelectronic component with reduced parasitic inductance and method of fabricating

Growing community of inventors

Mesa, AZ, United States of America

John Ryan Goodfellow