Texas Instruments Corporation

Texas Instruments Incorporated Deutschland, Gmbh

Ferdinand Stettner

Stefan Herzer

Pavol Balaz

Bernhard Wicht

Hongcheng Xu

Manuel Wiersch

A circuit for controlling a discharge transistor for a power stage includes a current mirror, a first diode, and a second diode. The current mirror includes first, second, third and fourth field-effect transistors (FETs) configured to provide a fast startup signal and a startup discharge signal. The startup discharge signal is provided to a gate of the discharge transistor. The first diode is configured to limit the fast startup signal to a first maximum voltage less than the supply voltage, and the second diode is configured to limit the startup discharge signal to a second maximum voltage less than the supply voltage.

Circuit and system for actively discharging a power stage input node during power supply turn-on

Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a first transistor, a second transistor, a third transistor, a first capacitor, and a second capacitor. The first transistor comprises a drain terminal coupled to an input voltage node, a source terminal coupled to a first node, and a gate terminal coupled to a second node. The second transistor comprises a drain terminal coupled to a third node, a source terminal coupled to a fourth node, and a gate terminal coupled to a fifth node. The third transistor comprises a drain terminal coupled to a sixth node, a source terminal configured to couple to a gate terminal of a switching transistor, and a gate terminal coupled to a seventh node. The first capacitor is coupled between the first node and the third node. The second capacitor is coupled between the fourth node and the sixth node.

Multi-capacitor bootstrap circuit

An adaptive slope generator can include a current mirror configured to receive a multiplied current that varies as a function of an output voltage and a switching frequency of a switching current. The output voltage can characterize the switching current provided to a load coupled to an inductor. The current mirror can also be configured to receive an oscillation current. The oscillation current can have an amplitude that corresponds to the switching frequency of the switching current. The current mirror can be further configured to generate an output current substantially equivalent to the product of the oscillation current and the output voltage. The adaptive slope generator can also include a ramp generator configured to generate a compensation signal based on the output current. The compensation signal can have a sawtooth shape and a slope that varies as a function of the output voltage.

Adaptive slope generator

An apparatus is provided that uses a first level shifter for performing a voltage shift of a low level input signal of a first voltage domain to a high level output signal of a second voltage domain. The first level shifter comprises a storing element in the second voltage domain, an input stage coupled to the storing element for providing a signal state to be stored in the storing element and a feedback loop from an output of the storing element to the input stage for controlling the input stage in response to a transition of a high level output signal of the storing element.

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Dachau, Germany

Ferdinand Stettner