Texas Instruments Incorporated Deutschland, Gmbh

Markus Matzberger

Konrad Wagensohner

Erich Bayer

Anton Winkler

A low power DC-DC converter includes a converter stage coupled to an input node, and having a low side switch and a rectifier switch. A peak current detector senses a current at the low side switch and a zero current detector senses a current at the rectifier switch. It is configured to set the low side switch to a non-conductive state and the rectifier switch to a conductive state if the peak current detector detects a predetermined peak current. It is configured to set the rectifier switch to a non-conductive state if the zero current detector detects zero current at the rectifier switch. A time interval between subsequent current peaks is triggered by a charge comparator receiving an average current fed to the low side and rectifier switches from the input node and a reference current coupled to the charge comparator by a reference current source.

Low power switching DC-DC converter and method of the same

A serial interface circuit for a single logic input pin of an electronic system, comprising a decoder for converting a pulse width modulated input signal applied to the pin to a sequence of logic low and logic high values. The decoder comprises an up/down counter with a count input connected to a clock source, an edge detection circuit detecting rising and falling edges of the input signal. The edge detection circuit is connected to the up/down counter to start up counting from a reset value upon detection of an edge in a first direction and to start down counting from a current count upon detection of an edge in a second direction. The decoder further comprises a bit value deciding circuit that delivers a first logic value when the count of the up/down counter is above the reset value on detection of an edge in the second direction and delivers a second logic value when the count of the up/down counter is at or below the reset value on detection of an edge in the second direction.

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Tiefenbach, Germany

Markus Matzberger