Texas Instruments Corporation

Texas Instruments Incorporated Deutschland, Gmbh

Rüdiger Ganz

Johann Erich Bayer

Ivan Shumkov

Stefan Reithmaier

Oliver Nehrig

A system has an input and an output. The system includes a voltage converter, including first transistor coupled to the input and to a first switching node, second transistor coupled to the first switching node and to ground, third transistor coupled to a second switching node and to the output, fourth transistor coupled to the second switching node and to ground, and an inductor having a first terminal coupled to the first switching node and a second terminal coupled to the second switching node. The system also includes a controller coupled to the voltage converter, the controller including a state machine and a plurality of drivers to control the transistors of the voltage converter. The state machine is adaptable to cause the second and fourth transistors to conduct and the first and third transistors not to conduct, in response to current through the inductor being less than a current threshold.

4-phase buck-boost converter

A buck-boost converter includes a voltage input terminal, a voltage output terminal, a first switch, a second switch, an inductor, a third switch, and an auxiliary capacitor. The first switch includes a first terminal coupled to the voltage input terminal, and a second terminal. The second switch includes a first terminal coupled to the voltage output terminal, and a second terminal. The inductor is coupled between the second terminal of the first switch and the second terminal of the second switch. The third switch includes a first terminal coupled to the second terminal of the second switch, and a second terminal. The auxiliary capacitor is coupled to the second terminal of the third switch.

Single inductor buck-boost converter with auxiliary capacitor

A controller includes a comparator having an inverting input coupled to a voltage converter output, a non-inverting input coupled to a voltage source, and an output. The controller includes a timer having a start input coupled to the converter that indicates that current through a converter inductor is less than a threshold; a stop input coupled to the comparator output; and an output having a digital value corresponding to the time between receiving asserted signals at start input and at stop input. The controller includes a time comparator having a first input coupled to the timer output and a second input to receive a time value. The time comparator asserts one of its outputs based on the digital and time values. The controller includes an accumulator coupled to the time comparator outputs, the accumulator configured to maintain, increase, or decrease an output value based on the asserted time comparator output.

Digital control for voltage converter

A method of capacitance-to-voltage conversion with an external sensor capacitor (C) and a capacitance-to-voltage converter () implemented on an integrated readout circuit that includes a reference capacitor (C), a sampling capacitor (C) and a sampling amplifier () and which has input terminals () to which the sensor capacitor (C) is connected. The method comprises the steps of a) applying a reference voltage (V) to the series connected sensor capacitor (C) and reference capacitor (C) and charging the sampling capacitor (C) to the potential at the interconnection node (A) between the sensor capacitor (C) and the reference capacitor (C), b) connecting the sampling capacitor (C) to inputs of the sampling amplifier. The method further comprises the steps of c) applying the reference voltage (V) to the series connected sensor capacitor (C) and reference capacitor (C) with a polarity opposite to that in step a) and charging the sampling capacitor (C) to the potential at the interconnection node (A) between the sensor capacitor (C) and the reference capacitor (C) and d) connecting the sampling capacitor (C) to the inputs of the sampling amplifier in a polarity opposite to that in step b).

Growing community of inventors

Freising, Germany

Rüdiger Ganz