Abstract: In accordance with the teachings described herein, systems and methods are provided for charging a rechargeable power source in a mobile device through a USB port. A power converter may be used to receive an input voltage from an external power source and generate a charger output having a regulated voltage. A signal generator may be used to generate a charger configuration signal having pre-selected waveform characteristics that are selected to identify operating characteristics of the charging apparatus. A USB connector may be used for coupling the charger output and charger configuration signal to the USB port on the mobile device. The USB connector may include a voltage bus (Vbus) contact coupled to the charger output, a positive data (D+) contact coupled to the charger configuration signal, and a negative data (D?) contact coupled to the charger configuration signal.

Abstract: A dual output voltage regulator circuit is disclosed. The output voltage regulator has a first FET and a second FET. A current source responsive to the regulated output voltage provides a current drive to the gate of the first FET in a first mode of operation and to the gate of the second FET in a second mode of operation. Further, the circuit employs switches for switchably selecting between the first mode of operation and the second mode of operation.

Abstract: A battery low-voltage protecting device is disclosed as including an input terminal connected, via a first lead wire and a switch driver circuit, with a positive terminal of a battery; an output terminal connected, via a second lead wire, with a load; a ground terminal connected, via a third lead wire, with an automobile body and a negative terminal of the battery; a declining voltage integrating circuit; a voltage detector; and a timer switch control circuit; in which the voltage of said declining voltage integrating circuit rises when the voltage of said battery rises, and falls when the voltage of said battery falls; and the declining voltage integrating circuit can differentiate between a quick fall in the voltage of the battery from a slow fall in the voltage of the battery, and output voltage signals to the voltage detector; and the voltage sensor can receive voltage signals outputted by the declining voltage integrating circuit, to compare the voltage signals with a pre-defined voltage level, and to ou

Abstract: Disclosed herein is a portable charger for a mobile phone. The portable charger includes a front housing, a rear housing, a belt clip, a fastening unit, a pair of clamps, a release button, an interface connector, a secondary battery and a charge control unit. The portable charger is easy to carry, can easily charge the battery of the mobile phone with direct current power charged in a secondary battery, and can simultaneously charge the secondary battery and the battery of the mobile phone using a travel adaptor.

Abstract: Modular unit connectable to a battery for monitoring its condition and protecting, including a housing which is directly connectable to the B battery posts of by means of receptor terminals clamped to said posts, the housing containing a first BD module, used to perform a disconnection of the supply of energy from said B battery; a second electronic module BM, used for a dynamic measurement of the B battery's state of health (SOH) and charge (SOC); a third electronic LCM module, used to control and manage all or part of the charges that supply said B battery, and a fourth electronic PDFS module, used to control the distribution of power supplied by said B battery.

Abstract: The present invention relates to a method and a device for ascertaining the electric power, provided by a battery and a generator, available in a motor-vehicle electrical system. To determine the available electric power, both a battery model and a generator model are provided, from which the battery reserve power and the generator reserve power may be ascertained. The total power available in the vehicle electrical system is finally determined from the battery reserve power and the generator reserve power.

Abstract: A current/charge-voltage converter having an operational amplifier and a first capacitor connected between the input terminal and the output terminal of the operational amplifier, comprising a first switch which has one end connected to this input terminal, a first signal source that generates control signals for the first switch, a second capacitor connected to the first capacitor, and a second signal source connected to the other terminal of the second capacitor.

Abstract: Alteration of voltage input to a voltage regulator output stage from a Vbus regulator stage in a two-stage voltage regulator provides optimal Vbus voltage placement for a wide range of current loads to increase voltage regulator efficiency and is particularly suited to CPUs having power-saving sleep modes of operation. An optimal voltage is selected or developed in response to information concerning operational mode or current consumption of the powered device. As a perfecting feature of one embodiment of the invention in which a discrete Vbus voltage is selected based on operational mode, the selected voltage is adjusted to further optimize the matching of the Vbus voltage placement to the load and provides a continuous range of voltages. In a second embodiment the entire Vbus positioning function is performed in response to current load information. A feed-forward arrangement is provided to avoid transient spikes as the Vbus voltage placement is altered.

Abstract: A battery monitoring system including a first device powered by a first battery, a second device powered by a second battery and operated in conjunction with the first device, a first information generating portion that generates a first information indicating the state of the first battery, a second information generating portion that generates a second information indicating the state of the second battery, and an information selecting portion that selects and outputs at least one of the first information and the second information.

Abstract: A method and circuit for energizing an electric energy storage device (10) to a high voltage with electric energy supplied by a high voltage electric power source (16) in a safe, effective and efficient manner by first moving electric charges supplied by a high voltage power source (16) to a capacitive device (20) and then subsequently transferring the electric charges stored in an energized capacitive device (20) to an electric energy storage device (10) for later use. A method and circuit for de-energizing an electric energy storage device (10) from a very high voltage in a safe, effective, and efficient manner by first moving electric charges supplied by the electric energy storage device to a capacitive device (20) and then subsequently de-energizing an energized capacitive device (20) through an electrical load device (18) so that useful work can be performed.

Abstract: A safety device for lithium ion cells or groups of lithium ion cells connected in parallel and in series by providing a continuously balanced state of charge while in a discharge phase, a charge phase, a quiescent phase, a storage phase, or combinations of these phases.

Abstract: The present invention is related to a pulse frequency modulation for induction charge device, which comprises a pulse frequency modulation for induction charge device being provided to charge a portable electronic device, wherein, the portable electronic device comprises a induction coil, which comprises: an electric magnetic field generate and the secondary coil react circuit; a detection and modulation generate circuit; and a control switch circuit; whereby, the detection and modulation generate circuit could generate pulse singles with various frequencies according to the load varying generated due to distance varying between the portable electronic device and the charged device, and charge to the portable electronic device according the pulse singles so as to reach the goal of effective management the power.

Abstract: An adaptive leading edge blanking circuit in which the leading edge blanking time is reduced at low to very low power levels of an SMPS, but is substantially constant at medium to high power levels. Adapted leading edge blanking time maybe provided by modifying a conventional leading edge blanking timer in which a fixed voltage reference source is replaced with a variable voltage reference source, the variable voltage reference being dependent upon power requirements on a secondary side of the SMPS.

Abstract: A power source having a housing is disclosed. A first power cord extends from the housing. The first power cord has a first connector positioned at a distal end thereof for selective connection to an external power source. A second power cord extends from the housing. The second power cord having a second connector positioned at a distal end thereof for selective connection to an electronic device. A power adapter is connected between the first and second power cord. Upon connecting the external power source, the power adapter detects the presence of and receives external power through the first power cord and transfers power to the electronic device through the second cord. The power adapter also retains a charge therein for providing power to the electronic device when no external power source is detected.

Abstract: A communication portion of a video camera receives expected power information of a printer from the printer, and also receives battery power information from a battery pack. When a microcomputer judges that there is any shift to a state where the power consumption amount under operating state is varied, that is, the printer is under a print standby state for printing operation, an operating portion reads out expected power information of the video camera under operation of the printer which is stored in advance is read out from the storage portion to calculate the expected power consumption amount of a video camera system under the operation of the printer on the basis of the expected power information of the printer received by the communication portion and the expected power information of the video camera read out, and the battery residual amount time is determined on the basis of the expected power consumption amount.

Abstract: A circuit is provided for controlling a minimum operating voltage of an integrated control circuit of a switching power supply. The circuit includes at least one switch for switching the minimum operating voltage from a first voltage value to a second voltage value under conditions of low or null load of the switching power supply, and for switching the minimum operating voltage from the second voltage value to the first voltage value if the load of the switching power supply is greater than a predetermined load and the supply voltage is greater than the first voltage value. The minimum operating voltage can assume at least the first voltage value and the second voltage value, and the first voltage value is greater than the second voltage value. Also provided is a method for controlling a minimum operating voltage of an integrated control circuit of a switching power supply.

Abstract: A method for charge control of a photoflash capacitor. The method includes detecting a voltage on the photoflash capacitor, asserting and then latching a recharge signal when the detected voltage is lower than a first reference voltage, de-asserting and then latching the recharge signal when the detected voltage exceeds a second reference voltage, charging the photoflash capacitor when the recharge signal is asserted, and providing a pin for connection of a resistive element which determines the first reference voltage.

Abstract: A switched mode voltage regulator has a digital control system that includes dual digital control loops. The voltage regulator comprises at least one power switch adapted to convey power between respective input and output terminals of the voltage regulator and a digital controller adapted to control operation of the power switches responsive to an output of the voltage regulator. The digital controller further comprises dual digital control loops in which a first control loop provides high speed with lower regulation accuracy and a second control loop has high accuracy with lower speed. Thus, the digital control system provides the advantages of both high speed and high regulation accuracy.

Abstract: A switching regulator provides energy to an inductor-capacitor combination that supply a DC voltage as an output. The presence of a current that can be significantly lower than the typical load current is detected using a pulse signal that provides a measure of the current supplied by the regulator to the inductor. A comparator compares this signal to a reference voltage that is related to the current level to be detected. This reference voltage is adjustable based on the voltage applied by the regulator and the voltage being ultimately supplied as the DC output voltage. The comparator and a capacitor perform an integration function that results in a voltage that ramps upward if the current threshold is being exceeded. When this ramping voltage passes a predetermined level, a signal is provided to indicate that the threshold has been exceeded.

Abstract: A switching regulator and method of fabricating a switching regulator is disclosed. In one embodiment a switching regulator comprises a transformer having a primary winding and a secondary winding, an inductor (L) connected to an input of the primary winding, and a capacitor (C) connected across the primary winding of the transformer. The inductor and capacitor form a L-C tank circuit. The switching regulator also includes a frequency source connected to the inductor, wherein the frequency source provides a switching frequency to the inductor that is substantially equal to a resonant frequency of the L-C tank circuit.