Texas Instruments Corporation

Virginia Tech Intellectual Properties, Inc.

Rengang Chen

Scott Edward Ragona

Evan Reutzel

Preetam Charan Anand Tadeparthy

Bhaskar Ramachandran

David Jauregui

Preetam Tadeparthy

Dattatreya Baragur Suryanarayana

Vishnuvardhan Reddy Jaladanki

Bo Wang

Rajesh Venugopal

Khai Doan The Ngo

Matthew John Ascher Schurmann

Ting Ge

Cong Tu

An apparatus includes a first variable resistor having a first resistor control terminal and a second variable resistor having a second resistor control terminal. The apparatus also includes a temperature sensing circuit having a temperature sensing output, the temperature sensing circuit configured to provide a device temperature indication at the temperature sensing output. Additionally, the apparatus includes a controller having a controller input, a controller output, the controller input coupled to the temperature sensing output, the controller output coupled to the first resistor control terminal and to the second resistor control terminal, the controller configured to produce a control signal at the controller output responsive to the device temperature indication.

Rdson-based current sensing system

In an example, a circuit includes an emulated current generator configured to provide an emulated current signal responsive to a charge current and a discharge current. The emulated current signal can be representative of an emulated current through an output inductor. A comparator is configured to provide a comparator signal responsive to the emulated current signal and sensed current signal representative of a measure of current through the output inductor. An inductor code counter is configured to adjust an inductor code count value responsive to the comparator signal. A slope of the emulated current signal can be adjusted responsive to the inductor code count value.

Inductance detection for power converters

A DC-DC converter includes a current sense circuit. The current sense circuit includes a sense current output, an inductor current measurement circuit, an inductor current emulation circuit, a first switch, and a second switch. The inductor current measurement circuit has an output. The inductor current emulation circuit has an output. The first switch is coupled between the output of the inductor current measurement circuit and the sense current output. The second switch is coupled between the output of the inductor current emulation circuit and the sense current output.

DC-DC converter with hybrid current sensing

A device includes a current mirror, a switch, first and second current paths, first and second buffers, a variable resistor, a temperature-sensing circuit, and a controller. The first current path is coupled between the current mirror's input and the switch. The switch switches between ground and a transistor based on a control signal. The second current path is coupled between a first current mirror output and ground. The first buffer is coupled to a second current mirror output. The second buffer is coupled to the variable resistor, which is coupled to the first buffer. The temperature-sensing circuit provides a device temperature to the controller, which is coupled to a first buffer output and determines a first adjustment to the first and second current paths and a second adjustment to the variable resistor based on the device temperature.

A system includes a first power stage circuit having a first PWM input, a first voltage input and a first power output. The first power stage circuit is configured to provide a first current at the first power output responsive to a PWM signal at the first PWM input, and configured to receive a voltage at the first voltage input. The system includes a second power stage circuit having a second PWM input, a second voltage input and a second power output. The second voltage input is coupled to the first voltage input, and the second power stage circuit is configured to provide a second current at the second power output responsive to the PWM signal at the second PWM input. The second power stage circuit is configured to receive the voltage at the second voltage input, the voltage representing an average of the first current and the second current.

Current sharing power stage for phase multiplication applications

Aspects of series resonator DC-to-DC converters are described. A series resonator DC-to-DC converter can include a first half-bridge circuit comprising a first high-side switch and a first low-side switch, a second half-bridge circuit comprising a second high-side switch and a second low-side switch, and a resonator in series between the first high-side switch and the first low-side switch. The circuit design and switching controller can be relied upon to impart soft-switching.

Series resonator converter

A converter stage having a control pin, an input voltage pin, an output pin, a ground pin, a high-side switch coupled between the input voltage pin and the output pin, a low-side switch coupled between the output pin and the ground pin, a current sensor configured to detect a current at the output pin, and control logic coupled to the control pin and the current sensor. The control logic is configured to control switching of the high-side and the low-side switches in continuous conduction mode, discontinuous conduction mode, and body braking control for the converter stage in response to a first signal received via the control line and a second signal received from the current sensor. A driver controls switching, based on the detected current and sequential event tracking, between an on state and an off state.

Direct current (DC)-DC power converter with multiple modes of operation

A switching converter having a high-side switching transistor and a low-side switching transistor and an inductor, having a circuit for generating a simulated waveform representing a sawtooth inductor current waveform. A circuit for monitoring and voltage at a switch node between the high-side and low-side transistors to determine a time during which the inductor current is increasing and a time during which the inductor current is decreasing wherein voltage across the low-side transistor when it is conducting represents a first portion of the simulated sawtooth inductor current waveform. A circuit for utilizing the time when the inductor current is increasing, the time when the inductor current is decreasing and the voltage across the low-side transistor when it is conducting to generate a portion of the simulated inductor current waveform when the high-side transistor is conducting. A method and a power supply utilizing this circuit are also disclosed.

Systems and methods for real-time inductor current simulation for a switching converter

Systems and methods for regulating a switching converter are disclosed. One embodiment of the present invention relates to a power supply system that includes a switching converter that provides an output voltage by alternately turning on and off a high-side transistor and a low-side transistor both coupled to an output inductor through a switching node. The switching converter includes a drive circuit that regulates the output voltage based on a feedback signal. The power supply system also includes a simulated output generator that generates and provides the drive circuit with a simulated inductor waveform as the feedback signal based on a low-side output waveform of the low-side transistor measured at the switching node during off-times of the switching converter.

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Hellertown, PA, United States of America

Rengang Chen