Texas Instruments Corporation

Rahul Prakash

Vadim Valerievich Ivanov

Keith Brouse

Chintan Trehan

Navin Venkata Kommaraju

Joselito L Parguian

A circuit includes an output current circuit that employs a regulated voltage to provide an output voltage to drive a load current through an output load resistor. A load resistance sensor (LRS) senses the resistance of the output load resistor based on the output voltage and the load current. A controller provides a sense voltage control command to set the regulated voltage to an initial sense voltage during a sense mode. The initial sense voltage adjusts the output voltage of the output current circuit and enables the LRS to sense the resistance of the output load resistor at a given setting of the load current. The controller provides a clamp control command based on the sensed resistance of the output load resistor to set the regulated voltage to a fixed regulated voltage during an operation mode. The fixed regulated voltage enables the output current circuit to supply a predetermined maximum load current to the output load resistor at a predetermined minimum setting of the output voltage.

Adaptive power adjustment for current output circuit

A buck-boost regulation methodology operable, in one embodiment, with a single inductor, four-switch (S-S) buck-boost regulator configured for DCM. Buck-boost transition switching control is operable when inductor charge time exceeds a max charge time, and inductor discharge time exceeds a max discharge time, and includes: (a) during charge transition cycles, at the end of the max charge time, if Iis less than a predetermined peak current I, switching Son (grounding the output side of the inductor) and Soff, causing Ito increase (a rapid SScharging current ramp), until Ireaches I, and (b) during discharge transition cycles, at the end of the max charge time, if Iis greater than zero, switching Soff and Son (grounding the input side of the inductor), causing Ito increase (a rapid SSIdischarging current ramp), until Ireaches zero.

Buck-boost converter with buck-boost transition switching control

A method reading bank register values is provided. Register values are stored in a readback bank. The register values are output sequentially from the serial bank. An indicator is received by the serial bank. A determination is then made as to whether the indicator was received by the serial bank prior to completion of the outputting of the register values. If the indicator was received prior to completion of the outputting of the register values, the register values are loaded into the serial bank from the readback bank.

Growing community of inventors

Dallas, TX, United States of America

Rahul Prakash