Patent application number | Description | Published |
20090200989 | Method and Apparatus for Handling a Charging State in a Mobile Electronic Device - The present invention is directed at a method of handling a device charging state for a Universal Serial Bus (USB) connected mobile electronic device comprising the steps of sensing a presence of a bus voltage; sensing an enumeration acknowledgement signal between the device and a USB host; and transmitting a signal to instruct the device to enter the device charging state. | 08-13-2009 |
20100102774 | Method and Apparatus for Handling a Charging State in a Mobile Electronic Device - In accordance with the teachings described herein, a method and apparatus for handling a charging state in a mobile electronic device is provided. A universal serial bus (USB) interface may be used for connecting the mobile device to a USB host. A processing device may be used to control operation of the mobile device and receive an enumeration acknowledgement signal from the USB host via the USB interface and generate an enable signal upon receiving the enumeration acknowledgement signal. The method and apparatus may further include a rechargeable battery, a battery charger, a timing circuit, and a battery charger enabling circuit. | 04-29-2010 |
20100117595 | Method and Apparatus for Handling a Charging State in a Mobile Electronic Device - A system and method for using a universal serial bus (USB) interface in a mobile device is provided that includes providing a battery charger operable to receive a voltage provided at the USB interface, the battery charger operable for charging a battery in the mobile device, and, a voltage regulator operable to receive a voltage provided at the USB interface, the voltage regulator used in powering the mobile device. The method also includes, detecting a USB bus voltage at the USB interface, measuring passage of a predetermined amount of time upon detecting the USB bus voltage, and disabling at least one of the voltage regulator and the battery charger if the predetermined amount of time expires before an enumeration acknowledgement signal is received at the USB interface. | 05-13-2010 |
20100127864 | Systems and Methods for Charging a Chargeable USB Device - Systems and methods are provided for charging a USB device. A USB connector may be used to couple the system to a USB port on the USB device, the USB connector including a bus voltage (Vbus) connector, a positive data (D+) connector, and a negative data (D−) connector. Charger circuitry may be used to receive a source voltage and convert the source voltage into the bus voltage (Vbus), wherein the bus voltage (Vbus) is used to charge the USB device. Presence detect circuitry may be used to compare a first voltage present on the D+ connector with a second voltage present on the D− connector in order to detect when the USB connector is coupled to the USB port of the USB device. | 05-27-2010 |
20100219797 | 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. | 09-02-2010 |
20100227653 | INTEGRATED SWITCH-MODE POWER SUPPLY AND LINEAR REGULATOR - A power supply includes a switching voltage regulator, and a linear voltage regulator coupled electrically in series with the switching voltage regulator. The switching voltage regulator includes a first input for receiving a DC input signal, a semiconductor switching stage coupled to the first input and configured to provide a first DC voltage signal from the received DC input signal. The magnitude of the first DC voltage signal is less than the received DC input signal. The linear voltage regulator includes a semiconductor current pass stage coupled to the output of the semiconductor switching stage and configured to provide a constant second DC output voltage signal from the first DC voltage signal. The voltage regulators are implemented together within a common integrated circuit housing. | 09-09-2010 |
20100289456 | Method and Apparatus for Handling a Charging State in a Mobile Electronic Device - The present invention is directed at a method of handling a device charging state for a Universal Serial Bus (USB) connected mobile electronic device comprising the steps of sensing a presence of a bus voltage; sensing an enumeration acknowledgement signal between the device and a USB host; and transmitting a signal to instruct the device to enter the device charging state. | 11-18-2010 |
20110127950 | Systems and Methods for Charging a Chargeable USB Device - Systems and methods are provided for charging a USB device. A USB connector may be used to couple the system to a USB port on the USB device, the USB connector including a bus voltage (Vbus) connector, a positive data (D+) connector, and a negative data (D−) connector. Charger circuitry may be used to receive a source voltage and convert the source voltage into the bus voltage (Vbus), wherein the bus voltage (Vbus) is used to charge the USB device. Presence detect circuitry may be used to compare a first voltage present on the D+ connector with a second voltage present on the D− connector in order to detect when the USB connector is coupled to the USB port of the USB device. | 06-02-2011 |
20110140674 | Method and Apparatus for Handling a Charging State in a Mobile Electronic Device - The present invention is directed at a method of handling a device charging state for a Universal Serial Bus (USB) connected mobile electronic device comprising the steps of sensing a presence of a bus voltage; sensing an enumeration acknowledgement signal between the device and a USB host; and transmitting a signal to instruct the device to enter the device charging state. | 06-16-2011 |
20110199750 | INTEGRATED SWITCH-MODE POWER SUPPLY AND LINEAR REGULATOR - A power supply includes a switching voltage regulator, and a linear voltage regulator coupled electrically in series with the switching voltage regulator. The switching voltage regulator includes a first input for receiving a DC input signal, a semiconductor switching stage coupled to the first input and configured to provide a first DC voltage signal from the received DC input signal. The magnitude of the first DC voltage signal is less than the received DC input signal. The linear voltage regulator includes a semiconductor current pass stage coupled to the output of the semiconductor switching stage and configured to provide a constant second DC output voltage signal from the first DC voltage signal. The voltage regulators are implemented together within a common integrated circuit housing. | 08-18-2011 |