Texas Instruments Corporation

Other

Roy Alan Hastings

Deric Wayne Waters

Nicolas Salamina

Lemuel Herbert Thompson, Ii

Marco Corsi

Gabriel Alfonso Ricon-Mora

David D Briggs

Chengxi Liu

Buddhika J Abesingha

Leland Scott Swanson

Marwan M Hassoun

Neil Gibson

David Alexander Grant

Thomas A Schmidt

Todd M Neale

Nghia Trong Tang

Brad P Whitney

Riazdeen Buhari

Steven R Tom

Frank L Thiel, V

Laura A Hnilo

Lemuel Herbert Thompson Ii

William C Johnston

Mike P Pierce

In examples, a circuit comprises a first current source coupled to a voltage source node. The circuit comprises a resistor having a first resistor terminal and a second resistor terminal, where the first resistor terminal is coupled to the first current source. The circuit comprises a bipolar transistor having a base, a collector, and an emitter, with the base coupled to the first resistor terminal, the emitter coupled to the second resistor terminal, and the collector coupled to the voltage source node. The circuit comprises a second current source coupled to the emitter and the second resistor terminal, with the second current source coupled to a ground node. The circuit comprises a Schmitt trigger having an input coupled to the emitter, the second resistor terminal, and the second current source.

Temperature sensors

In one embodiment, a system includes a power delivery ('PD') controller in a USB Type-C system that includes a configuration channel ('CC'), PD preamble detector, and a power-usage circuit. The PD controller includes a CC input that receives a PD message. The PD preamble detector is configured to detect a PD message preamble based in part upon a power of a filtered PD message and communicates a wake-up signal to the power-usage circuit in response to detecting a PD message preamble. The power-usage circuit is configured to exit a low-power mode in response to receiving the wake-up signal.

Low-power mode for a USB type-C power delivery controller

A sectioned field effect transistor ('FET') for implementing a rapidly changing sense range ratio dynamically in response to changing load and main supply conditions. The sectioned FET may have multiple main FET sections, and multiple sense FET sections. These sections can be dynamically connected and disconnected from the sectioned FET. The sections may also be connected by a common gate. There may also be common drain or source connections for the main FET sections, and also common drain or source connections for the sense FET sections. The sectioned FET allows for the sense range to be extended by a multiple of k+1, where k is the size ratio or factor of the additional sense FET sections. This allows the current sense range ratio to be extended to (m+n)/n*(k+1).

Apparatus and system for wide-range current sensing

Systems, methods, and circuitries are provided for calibrating a heater used to heat an adjustable resistance network during a trimming procedure. In one example, a circuit is provided that includes an adjustable resistance network including first resistance segments; a heater element thermally coupled to the adjustable resistance network; a calibration resistor including second resistance segments thermally coupled to the first resistance segments; and interface circuitry coupled to the calibration resistor.

On-chip heater temperature calibration

Aspects of the disclosure provide for a circuit. In at least some examples, the circuit includes a high-side power transistor, a low-side power transistor, a first transistor, a second transistor, and a third transistor. The high-side transistor is adapted to couple between an input node and a switch node. The low-side transistor is coupled between the switch node and ground. The first transistor is adapted to couple between a first node and the switch node. The second transistor is coupled between the first node and an output node. The third transistor is coupled between the first node and ground.

Power converter architecture using lower voltage power devices

In an example, a device comprises a first resistor coupled to a second resistor and to a trim resistor, the second resistor and the trim resistor coupled to a port configured to couple to a third resistor. The device also comprises a comparator having an inverting input coupled to a first node between the second resistor and the port and a non-inverting input coupled to a second node between the first resistor and the trim resistor. The device further includes a trim control circuit coupled to an output of the comparator and having an output coupled to the trim resistor, the trim control circuit configured to couple to multiple integrated trim resistors external to the device.

Resistor replicator

Methods, apparatus, systems and articles of manufacture are disclosed for current sensing and current limiting. An example apparatus includes a first main transistor including a first main transistor gate terminal coupled between an output terminal and an intermediate node; a second main transistor including a second main transistor gate terminal coupled between the intermediate node and a ground terminal; a first amplifier including a first amplifier output coupled to the first main transistor gate terminal; a second amplifier including a second amplifier output coupled to the second main transistor gate terminal; and a third amplifier including a third amplifier inverting input coupled to the intermediate node, a third amplifier non-inverting input coupled to a sense transistor, and a third amplifier output coupled to a third gate terminal of a third transistor.

Methods and apparatus for current sensing and current limiting

A reference signal generator includes a voltage reference, an amplifier coupled to the voltage reference, and a precharge circuit coupled to the amplifier. The voltage reference is configured to generate a constant voltage. The amplifier is configured to receive the constant voltage from the voltage reference and generate a regulating primary output signal and a non-regulating secondary output signal. The precharge circuit is configured to charge a noise reduction capacitor with the non-regulating secondary output signal.

Precharge circuit using non-regulating output of an amplifier

A method of power delivery. Port controllers each include a state machine, an IO pin, a receptacle supply pin receiving power from a receptacle, and a gate driver pin coupled to a control node of a power path switch each having an output coupled to a load. The state machines implement a dead-battery control (DBC) algorithm upon sensing a DB condition. The DBC algorithm pulls up the IO pin, starts a timer for Tand monitors the IO pin for TIf the IO pin is pulled low, the port controller is reset for a pulled low period, the DBC algorithm is then restarted or its IO pin is monitored until not pulled low for TOne port controller pulls its IO pin low for an assertion period to claim priority over the other port controller, and closes its associated power path switch to exclusively provide power to the load.

USB power delivery dead-battery control

An embodiment of the invention provides a method for continuously detecting when a USB client device may be charged according to a BCS charging standard. Power is supplied from a USB host device to the USB client device with a first current limit. Next, the USB host device monitors data lines D+ and D&#x2212; for a first part of a handshake. When the first part of the handshake is detected, a second part of the handshake is provided by the USB host device indicating that the USB client device may be changed according to the BCS charging standard. All current sources and all voltage sources that are coupled to the data lines D+ and D&#x2212; are decoupled from data lines D+ and D&#x2212; after the handshake is complete. After the data lines are decoupled, communication may begin between the USB host device and the USB client device.

Growing community of inventors

Allen, TX, United States of America

Roy Alan Hastings