Texas Instruments Corporation

Michael James Mills

Justin Patrick Vogt

Sujan Kundapur Manohar

Timothy Bryan Merkin

Anand Devendra Kudari

Mohammad Atiqur Rahman

Nagesh Narayana Swamy

Gregory Alan Watkins

Eric Beljaars

Methods, apparatus, systems and articles of manufacture are disclosed including a capacitor, located in a universal serial bus schematic. The methods, apparatus, systems and articles of manufacture include a controller, include a controller including a state machine and a control signal generator, wherein the controller is configured to be coupled to a connector and to a power supply, the state machine is configured to determine a state of the connector, and the control signal generator is configured to, in response to an indication of a device not connected to the connector, generate a signal to indicate to the power supply to charge a capacitor to a threshold voltage, and wherein the control signal generator is further configured to generate the signal until a second state.

Methods and apparatus to reduce inrush current in Universal Serial Bus circuits and systems

A power supply system for USB Power Delivery includes a current source drive circuit to control a power FET to regulate the supply of power along a power path. The current source drive circuit includes a cascode current source and a cascode protection circuit formed by a source follower and a feedback voltage divider. The source follower can be a transistor with its gate connected to a cascode node between upper- and lower-stage transistors of the cascode current source. The divider node of the voltage divider is connected to the gate of the lower-stage transistor. The current source drive circuit can operate within the gate-source voltage specifications of 30-volt DEPMOS devices, and can provide high output impedance to the gate of power FET and a current limit circuit during current limiting operation, without requiring an extra high-voltage mask during fabrication.

High voltage gate driver current source

Methods, apparatus, systems and articles of manufacture are disclosed to allow dynamic changing between current limiting methods. A power delivery controller comprising: a power control device; a first current control device, the first current control device to control the power control device when a current level associated with a current flowing between a first device and a second device exceeds a first adjustable current threshold value; a second current control device to control the power control device when the current level exceeds a second adjustable current threshold value; and a configuration manager to, during runtime, set a first configuration setting of the first current control device and a second configuration setting of the second current control device, the first configuration setting and second configuration setting based on a negotiated contract corresponding to the first device and the second device.

Methods and apparatus to dynamically limit current

A power circuit having a reverse voltage recovery boost circuit that speeds up a recovery time of the power circuit after a reverse voltage condition has cleared is provided. The power circuit includes a reverse voltage detector that detects the reverse voltage condition. After the reverse voltage condition clears, the reverse voltage recovery boost circuit transfers a portion of power to one transistor that is stored in another transistor thereby transitioning the one transistor from a non-conductive state to a conductive state, which allows a transfer of power from the input voltage to the output voltage.

Reverse voltage recovery circuit

A current-sense ratio calibration system includes a power field effect transistor (FET) integrated circuit (IC) that includes a regulator FET to regulate current through a power path and a sense FET to provide a sense current to a sense path. The regulator FET and sense FET have an intended current-sense ratio. The system calibrates the current-sense ratio by applying proportioned stimulus signals to the power and sense paths, the proportion being the intended current-sense ratio. The calibration circuitry compares a measurement of a sense path circuit parameter made during the stimulus application to a measurement of the parameter made not during the stimulus application to derive an error term used to calibrate for any sources of error in the current-sense ratio.

Current-sense ratio calibration

An apparatus includes an amplifier configured to compare a feedback input, corresponding to a voltage of an output voltage node, with respect to a reference input and to provide a control output to control the output voltage node based on a difference between the feedback input and the reference input. At least two source circuits are coupled with the output voltage node. Each of the source circuits are configured to provide respective voltage sources to supply electrical power to the output voltage node.

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Plano, TX, United States of America

Michael James Mills