Texas Instruments Corporation

Kashyap Jayendra Barot

Sreeram Subramanyam Nasum

Anant Shankar Kamath

Yogesh Kumar Ramadass

Kumar Anurag Shrivastava

Suvadip Banerjee

Ujwal Radhakrishna

Vinod Kuniganahalli Rai

Sreeram Nasum Subramanyam

Niranjan Shankar

A device includes first and second device terminals, a fuse, a first circuit, a first transistor, and a control circuit. The fuse terminal couples to the first device terminal. The first circuit couples to the second fuse terminal. The second fuse terminal has a first voltage. The first transistor has a first control input and first and second current terminals. The first current terminal couples to the second fuse terminal, and the second current terminal couples to the second device terminal. The control circuit: turns 'on' the first transistor into a saturation region if the first voltage exceeds a threshold and a current through the fuse exceeds a trip threshold current of the fuse; and turns “on” the first transistor into a linear region if the first voltage exceeds a threshold and a current through the fuse is below the trip threshold current of the fuse.

Fail-open isolator

An apparatus includes a first control circuit having an output and including a first comparator and a second control circuit coupled to the output of the first control circuit. The second control circuit includes a second comparator configured to: compare a first value to a reference frequency value, the first value indicating a frequency of a signal at the output of the first control circuit; and provide an adjustment value to change a hysteresis window of the first comparator.

Adaptive hysteretic control for a power converter

A bidirectional capacitive isolator includes a capacitive isolation network, a first transceiver circuit, and a second transceiver circuit. The capacitive isolation network includes a first port and a second port. The first transceiver circuit is coupled to the first port of the capacitive isolation network, and includes circuitry configured to cancel signal transmitted by the first transceiver circuit from signal received by the first transceiver circuit. The second transceiver circuit is coupled to the second port of the capacitive isolation network, and includes circuitry configured to cancel signal transmitted by the second transceiver circuit from signal received by the second transceiver circuit.

Isolated bidirectional communication circuit

An encoding and transmitting system for a digital isolator system includes a transmitter for transmitting combined edge indicator signals through an isolation barrier, an encoder for generating the combined edge indicator signals based on first and second signals, a refresh clock generator for generating a refresh clock signal based on the first signal, and a refresh edge generator for masking at least a portion of the refresh clock signal, such that the portion of the refresh clock signal is not reflected in the second signal. The isolation barrier of the digital isolator system may be a capacitive isolation barrier for galvanically isolating a receiver from the transmitter. If desired, the refresh edge generator may include a refresh mask generator, one or more logic gates, and a glitch filter. A method of operating a digital isolator system is also described.

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Bengaluru, India

Kashyap Jayendra Barot