Texas Instruments Corporation

Shinya Morita

Mehedi Hassan

Grant Evan Falkenburg

Lundy Findlay Taylor

An AFE chip for a smoke detector includes a DC/DC boost converter having a boost input, a boost output, and a boost upper power supply input. The boost input is coupled to a first pin that is adapted for coupling to a battery through an inductor and the boost output is coupled to a second pin. The DC/DC boost converter is configured to not switch when a voltage on the second pin is greater than a programmed boost voltage. A set of power regulator circuits have a power input, which is coupled to a third pin, and a power output. The third pin is adapted for receiving an input voltage, the power output is coupled to provide an internal voltage, and the set of power regulator circuits are further coupled to the boost upper power supply input.

Integrated circuit for smoke detector having compatibility with multiple power supplies

A system on a chip (SoC) for smoke detection includes power regulator circuits coupled to respective pins and analog sensor amplifier circuits that are each coupled to a respective pin of the pins coupled to the power regulator circuits. A first analog sensor amplifier circuit of the analog sensor amplifier circuits has a photoelectric amplifier circuit, a first LED driver and a second LED driver. The SoC also has a digital core that includes a digital logic circuit, register bits, and an MCU communication circuit. The MCU communication circuit is coupled to a data pin, the register bits are coupled to control or modify operation of the power regulator circuits and the analog sensor amplifier circuits, and the register bits are operable to be written to by an MCU.

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Plano, TX, United States of America

Shinya Morita