Patent application number | Description | Published |
20080278119 | BATTERY CHARGER FOR A HANDHELD COMPUTING DEVICE AND AN EXTERNAL BATTERY - A battery charger includes a power source for supplying a primary charge current to a first battery, and a charge manager for charging a second battery. The charge manager is coupled to the power source and is configured to charge the second battery with a secondary charge current in accordance with a continuous comparison between a predefined maximum current limit and a total current drawn from the power source. | 11-13-2008 |
20090096409 | Electronic Device Including Handheld Electronic Device With Dual Battery Configuration, and Associated Method - An improved handheld electronic device in conjunction with an improved holder for the handheld electronic device together form an improved electronic device. The handheld electronic device includes a first battery, and the holder includes a second battery and a charging apparatus. When the handheld electronic device and the holder are electrically connected together, such as when the handheld electronic device is received in a cavity formed in the holder and a plurality of first contacts on the handheld electronic device and a plurality of second contacts on the holder are electrically connected together, the charging apparatus charges the first battery on the handheld electronic device from the second battery on the holder. | 04-16-2009 |
20090230920 | BATTERY CHARGER HAVING ANALOG CHARGE PROFILE FOR CHARGING MULTIPLE BATTERIES - A battery charger for charging a plurality of batteries includes a plurality of charge managers and a cross-over controller coupled to the charge managers. The charge managers are coupled to a common power source that has a finite maximum available current. The cross-over controller is configured to continuously determine the charge current that is applied to one of the batteries by one of the charge managers, and to direct another one of the charge managers to apply to another one of the batteries a charge current that is based on the determined charge current. The total of the determined charge current that is applied to the one battery and the charge current that is applied to the other battery (prior to when the voltage across the other battery reaches a rated value) is continuously substantially equal to the maximum available current. | 09-17-2009 |
20090278506 | SYSTEM AND METHOD FOR DYNAMIC POWER MANAGEMENT OF A MOBILE DEVICE - The present relates to a system and method for dynamic power management of a mobile device. The mobile device has a plurality of loads and a battery charger electrically connected to a voltage rail. The method comprises monitoring the plurality of loads to determine when at least one of the loads will become active or inactive, determining a minimum required output voltage level to be provided by the voltage converter based on active loads and the at least one load that will become active or inactive and device operation; and adjusting an input voltage level via the voltage converter to provide the minimum required output voltage level on the voltage rail in advance of the at least one load becoming active or after the at least one load becomes inactive. The method further monitors the input voltage level, and determines whether the input voltage level is below a first predetermine threshold. When the input voltage level falls below the first threshold, the method reduces the output voltage level provided by the voltage converter thereby reducing a charging rate of the battery charger. | 11-12-2009 |
20100156179 | CHARGING AND POWER SUPPLY FOR MOBILE DEVICES - Charging and power supply for mobile devices is disclosed. A USB-compliant charging and power supply circuit includes switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power through an output node to an electronic system of an electronic communication device and a battery. Battery isolation circuitry includes a semiconductor switch connecting the output node to the battery. The battery isolation circuitry senses voltage at the output node and variably restricts current to the battery when the voltage is below a minimum voltage value by operationally controlling the semiconductor switch as current passes through it. During variable current restriction the electronic system is supplied required power with said battery being supplied any additional available power. | 06-24-2010 |
20100308777 | CIRCUIT AND METHOD OF OPERATION FOR AN ELECTRICAL POWER SUPPLY - A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power. | 12-09-2010 |
20110099802 | CHARGING AND POWER SUPPLY FOR MOBILE DEVICES - Charging and power supply for mobile devices is disclosed. A USB-compliant charging and power supply circuit includes switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power through an output node to an electronic system of an electronic communication device and a battery. Battery isolation circuitry includes a semiconductor switch connecting the output node to the battery. The battery isolation circuitry senses voltage at the output node and variably restricts current to the battery when the voltage is below a minimum voltage value by operationally controlling the semiconductor switch as current passes through it. During variable current restriction the electronic system is supplied required power with said battery being supplied any additional available power. | 05-05-2011 |
20110133702 | CIRCUIT AND METHOD OF OPERATION FOR AN ELECTRICAL POWER SUPPLY - A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power. | 06-09-2011 |
20110260680 | CIRCUIT AND METHOD OF OPERATION FOR AN ELECTRICAL POWER SUPPLY - A battery charging circuit comprising: a semiconductor switch having an output connected to a rechargeable battery; a battery charge controller for receiving power from an external source, and supplying output power to a portable device and the input of the semiconductor switch, the current output of the battery charge controller being controllable; and a voltage sensing circuit for: measuring the voltage drop across the battery charge controller; and responding to the voltage drop across the battery charge controller by modulating the semiconductor switch to reduce the quantity of current supplied to the rechargeable battery when the voltage drop is too great; whereby the total power dissipated by the battery charge controller is controlled, the portable device receiving the power it needs to operate and the rechargeable battery receiving any additional available power. | 10-27-2011 |
20120021709 | SYSTEM AND METHOD FOR MANAGING BATTERY SLUMP DURING WIRELESS COMMUNICATIONS USING SIGNAL TRIGGERED VOLTAGE MONITORING - A system and method for managing battery slump in a battery-powered communications device including: an input configured for receiving battery voltage level information; an output configured for sending a signal for terminating a transmission; and a controller connected to the input and the output and configured to receive the battery voltage level information from the input; monitor the battery voltage level information; and send a signal via the output to terminate a transmission if the battery voltage level information crosses a predetermined threshold during the transmission. In particular, the system and method may further include an input connected to the controller and configured for receiving a signal indicating when a transmission is beginning or occurring and the controller is further configured to receive and monitor the battery voltage level information only when the transmission is occurring. | 01-26-2012 |
20120306272 | SYSTEM AND METHOD FOR DYNAMIC POWER MANAGEMENT OF A MOBILE DEVICE - A method of dynamic power management of a mobile device. The method includes monitoring at least one load to determine when at least one of the loads will become active or inactive, determining a minimum required output voltage level to be provided by a single voltage converter based on voltage level requirements of the at least one load that will become active or inactive, converting an input voltage level via the voltage converter to provide the minimum required output voltage level to the output power port in advance of the at least one load becoming active or after the at least one load becomes inactive, monitoring the input voltage level, determining whether the input voltage level is below a first threshold, and when the input voltage level is below the first threshold, reducing the output voltage level provided by the single voltage converter. | 12-06-2012 |
20130033226 | Method and Apparatus for Handling a Charging State in a Mobile Electronic Device - Disclosed is a mobile device comprising a voltage supervisor and reset (VSAR) module configured to detect an input voltage, start a timer set to a predetermined time period responsive to detecting the input voltage, and output a low signal responsive to detecting the input voltage. The mobile device also comprises a battery charger module configured to receive the input voltage, receive the low signal, output a power signal, and charge a battery. The mobile device also comprises a processing module configured to receive the power signal, and attempt enumeration responsive to receiving the power signal, wherein the VSAR module is further configured to output a high signal to the battery charger module when the timer expires and enumeration has not been completed. | 02-07-2013 |
20130106341 | HYBRID BATTERY SYSTEM FOR PORTABLE ELECTRONIC DEVICES | 05-02-2013 |
20130109443 | HYBRID BATTERY SYSTEM FOR PORTABLE ELECTRONIC DEVICES | 05-02-2013 |
20130134923 | APPARATUS, AND ASSOCIATED METHOD, FOR PROVIDING CHARGING ENERGY TO RECHARGE A PORTABLE POWER SUPPLY - An apparatus, and an associated method, for providing charging energy to a portable power supply, sourced at the portable power supply of another portable electronic device. The portable electronic devices are arranged in a charging configuration in which the portable electronic device from which energy is to be sourced is coupled to the portable electronic device to which the charging energy is to be applied. A controller controls the charging operations to ensure that energy of a host portable power supply is not depleted beyond a minimum level, and the application of the charging energy is terminated when a recipient portable power supply is charged to a desired level or the host portable power supply is depleted to the minimum level. | 05-30-2013 |
20130159737 | Universal Serial Bus Current Limit - A load device includes a power input having an interface to a power supply; a peripheral power bus including an internal capacitance, and an active switch coupled to the power input and the peripheral power bus for applying power from the power input to the peripheral power bus. The load device also includes a switch controller coupled to the active switch for regulating the in-rush current drawn by the internal capacitance through the active switch while the internal capacitance is being charged. | 06-20-2013 |
20130285614 | SYSTEM AND METHOD FOR DYNAMIC POWER MANAGEMENT OF A MOBILE DEVICE - A mobile device adapted for dynamic power management. The mobile device includes an output power port, a voltage converter adapted to convert an input voltage to provide an output voltage to the output power port, and a processor. The processor is adapted to monitor at least one load electrically to determine when the at least one load will become active or inactive, determine a minimum required output voltage to be provided by the voltage converter based on the at least one load that will become active or inactive, control the voltage converter to provide at least the minimum required output voltage on the output power port in advance of the at least one load becoming active or after the at least one load becomes inactive, and when the input voltage is below the first threshold, control the voltage converter to reduce the output voltage. | 10-31-2013 |