Voltage regulator and control circuit for silver-zinc batteries in hearing instruments
First Claim
1. An apparatus for managing power within a voltage regulating circuit of a battery-powered hearing aid device, comprising:
- an input terminal of a voltage regulator receiving an input voltage (VIN) supplied by a battery;
an output terminal of the voltage regulator providing an output voltage (VOUT) to a hearing aid terminal electrically connected to one or more electrical components of the hearing aid device, the output voltage (VOUT) based on the input voltage (VIN);
a sensing terminal of the voltage regulator for sensing a charging current (VSENSE) between a charging device and charging contacts of the voltage regulating circuit; and
a switch device configured to;
transition to an ON state to allow the charging device to charge the battery based on the sensing terminal of the voltage regulator sensing the charging current (VSENSE) between the charging device and the charging contacts; and
transition to an OFF state to block the charging contacts from receiving voltage from the battery when the output voltage (VOUT) is present;
wherein the voltage regulator is configured to reduce a magnitude of the input voltage (VIN) when the magnitude of the input voltage (VIN) exceeds an input voltage threshold (Vin_thresh) to generate the output voltage (VOUT) having a magnitude that is less than a maximum output voltage (Vout_max) and is further configured not to downregulate the input voltage (VIN) when the magnitude of the input voltage (VIN) is not greater than the input voltage threshold (Vin_thresh).
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Abstract
The present invention provides an apparatus for managing power within a voltage regulating circuit of a battery-powered hearing aid device includes an input terminal of a voltage regulator that receives an input voltage supplied by a battery. An output terminal of the voltage regulator provides an output voltage to a hearing aid terminal that is electrically connected to one or more electrical components of the hearing aid device. A sensing terminal of the voltage regulator senses an electrical connection between the charging device is and charging contacts of the voltage regulating circuit. The voltage regulator is configured to reduce a magnitude of the input voltage when the magnitude of the input voltage exceeds an input voltage threshold to generate the output voltage having a magnitude that is less than a maximum output voltage.
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Citations
19 Claims
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1. An apparatus for managing power within a voltage regulating circuit of a battery-powered hearing aid device, comprising:
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an input terminal of a voltage regulator receiving an input voltage (VIN) supplied by a battery; an output terminal of the voltage regulator providing an output voltage (VOUT) to a hearing aid terminal electrically connected to one or more electrical components of the hearing aid device, the output voltage (VOUT) based on the input voltage (VIN); a sensing terminal of the voltage regulator for sensing a charging current (VSENSE) between a charging device and charging contacts of the voltage regulating circuit; and a switch device configured to; transition to an ON state to allow the charging device to charge the battery based on the sensing terminal of the voltage regulator sensing the charging current (VSENSE) between the charging device and the charging contacts; and transition to an OFF state to block the charging contacts from receiving voltage from the battery when the output voltage (VOUT) is present; wherein the voltage regulator is configured to reduce a magnitude of the input voltage (VIN) when the magnitude of the input voltage (VIN) exceeds an input voltage threshold (Vin_thresh) to generate the output voltage (VOUT) having a magnitude that is less than a maximum output voltage (Vout_max) and is further configured not to downregulate the input voltage (VIN) when the magnitude of the input voltage (VIN) is not greater than the input voltage threshold (Vin_thresh). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for managing power within a voltage regulating circuit of a battery-powered hearing aid device, comprising:
a processing device of a voltage regulator of the voltage regulating circuit executing the following steps, comprising; monitoring an input voltage (VIN) supplied by a battery for powering one or more electrical components of the hearing aid device; comparing a magnitude of the input voltage (VIN) to an input voltage threshold (Vin_thresh); monitoring a presence of a charging voltage signal (VSENSE) indicating one of a charge current and periodic current pulses from a charging device electrically connected to the voltage regulating circuit for charging the battery; controlling an output voltage (VOUT) to decrease to zero to shut down the hearing aid device based on the presence of the charging voltage signal (VSENSE); transitioning a switch device to an ON state to allow the charging device to fully charge the battery; and when the magnitude of the input voltage (VIN) is not greater than the input voltage threshold (Vin_thresh), determining the battery is indicative of a reduced voltage battery and not downregulating the input voltage (VIN) for powering the one or more electrical components; and when the magnitude of the input voltage (VIN) is greater than the input voltage threshold (Vin_thresh), determining the battery is indicative of an increased voltage battery and reducing the input voltage (VIN) to output the output voltage (VOUT) having a magnitude that is less than a maximum output voltage (Vout_max) for powering the one or more electrical components. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
Specification