Medtronic Minimed, Inc.

Jon Spurlin

Sheldon B Moberg

Adam S Trock

Seth N Kazarians

Michael Ortega

David P Lewinski

Belinda Lee

John Gablenz

Dennis P Bishop

Linda I Torres

Steve Chow

Kaezad J Mehta

Steven J Vargas

Mike Charles Vallet Tolle

Gabor Oroszlan

Thu Van Nguyen

Gary L Williams

A portable electronic device, such as a fluid infusion device, obtains its operating power from a primary battery and a secondary battery. The primary battery may be a replaceable battery, and the secondary battery may be a rechargeable battery that can be charged with the primary battery under certain conditions. The device utilizes a power management scheme that transitions between the primary battery and/or the secondary battery to prolong the useful life of the primary battery. The device may also generate an intelligent battery life indicator that displays an accurate representation of the remaining life of the primary battery.

Power control techniques for an electronic device

Battery life indication techniques for an electronic device

Systems, apparatus, and methods are provided for initializing a voltage bus. An exemplary system includes an input interface, a voltage bus, discharge circuitry coupled to the voltage bus, connection circuitry coupled between the voltage bus and the input interface, and a control module coupled to the connection circuitry and the discharge circuitry. The control module activates the discharge circuitry prior to activating the connection circuitry.

Systems and methods for initializing a voltage bus and medical devices incorporating same

A powering subassembly for a portable electronic device includes a main battery, a converter, a backup battery, and a controller. The main battery provides a main voltage and the backup battery can provide a backup voltage. The converter receives the main voltage and increases the main voltage to at least one operating voltage. The controller receives the operating voltage from the converter, monitors the voltage of the main battery, and compares the monitored main battery voltage to a main battery low voltage threshold. The controller transmits a disconnect signal to decouple the main battery from the converter if the monitored voltage from the main battery is less than the main battery low voltage threshold. The controller transmits a connection signal to couple the backup battery to the converter if the monitored voltage is less than the main battery low voltage threshold. The backup battery provides the power for a predetermined minimum amount of time.

Method and apparatus for predicting end of battery life

An energy source isolation and protection circuit is provided for an electronic device, such as a patient-worn or patient-carried medical device. The isolation and protection circuit includes a supply voltage rail, a reference voltage rail, an electrical load coupled across the supply voltage rail and the reference voltage rail, and an energy source for supplying a voltage to the electrical load via the supply voltage rail and the reference voltage rail. The isolation and protection circuit also includes a voltage-controlled switch architecture that is configured to detach and electrically isolate the energy source from the electrical load (and from itself) in response to the voltage of the energy source falling below a threshold voltage. The voltage-controlled switch architecture is also designed to maintain the energy source in the detached and electrically isolated state in the absence of operating voltage provided by the energy source to the voltage-controlled switch architecture.

Energy source isolation and protection circuit for an electronic device

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Northridge, CA, United States of America

Jon Spurlin