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7633266 |
Charger circuit and transformer used therein
The present invention discloses a transformer used in a charger circuit, in which the input side of the transformer is connected to an AC input and PWM control circuit of the charger circuit, the...
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7619394 |
Capacitor charger with a modulated current varying with an input voltage and method thereof
In a capacitor charger including a transformer having a primary winding connected with an input voltage and a secondary winding for transforming a primary current flowing through the primary...
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7598711 |
Power source switchover apparatus and method
An apparatus for switching from a first power supply to a second power supply. The embodiment may detect the charge or voltage of both the first and second power supply, and power a device from the...
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7589499 |
Over voltage transient controller
An over voltage transient controller to protect a rechargeable battery from an over voltage transient condition. The over voltage transient controller may comprise a comparator to compare a first...
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7573154 |
Battery operated portable electronic device having dual batteries
A battery-operated portable electronic device has a primary battery to provide energy to low current circuitry of the portable device, and a supplemental battery to provide intermittent bursts of...
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7570020 |
Apparatus and method for magnetic charger IC for batteries with recycling of the LC filter for re-use as a battery step-down converter
A voltage regulation and battery charging system is provided. The system may include a switching regulator selection control circuit, two switching regulator controller circuits, two power...
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7541778 |
Method and apparatus for detecting whether a lead acid battery is sulphated and for charging same
A method for charging a battery at a battery charger comprising connection means for connection to the terminals of a battery to be charged, means for detecting a voltage over the terminals of a...
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7521898 |
Charger, DC/DC converter including that charger, and control circuit thereof
A new charger wherein a reference voltage can be set therein. The charger charges a secondary battery via a DC/DC converter that has an arrangement in which a fuel cell, a solar cell or the like...
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7504803 |
Charging method for rechargeable batteries and device therefor
A charging method and device for a rechargeable battery to make more stable and faster full charging possible. One embodiment of a charging method for the rechargeable battery includes charging the...
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7474079 |
Battery charger with backup charging circuit
A charger capable of safely charging an apparatus even when the current limit value of an external power supply is less than the maximum charging current of the charger or when the battery voltage...
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7446506 |
Apparatus for preventing capacitor charger from overcharging and method thereof
The present invention provides an apparatus for controlling a capacitor charging circuit and a method thereof. The apparatus includes a first comparator, a second comparator, and a controller. The...
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7439708 |
Battery charger with control of two power supply circuits
To reduce power consumption when charging a secondary battery is not performed, a first power supply circuit is disabled but a second power supply circuit is enabled when the secondary battery is...
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7411374 |
Circuitry and control method for charging capacitive loads
A capacitor charging circuit comprises, power transfer circuitry, power switching control circuitry and voltage measurement circuitry. The power transfer circuitry transfers power from a power...
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7405526 |
Control apparatus and control method for voltage conversion apparatus
The SOC of a battery is calculated based on the voltage Vb and current Ib of a battery, and a battery electromotive voltage Vbo is calculated based on the SOC of the battery. Based on the battery...
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7363522 |
Apparatus and methods for information handling system with power supply device with variable output power
An information handling system includes a power source configured to provide a plurality of power levels to a load. At least one of the plurality of power levels corresponds to a level obtained by...
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7339354 |
Rechargeable battery charging method and apparatus
A method and an apparatus for charging a lithium-ion based rechargeable battery in a short time is provided. A terminal voltage of the rechargeable battery is compared with a predetermined first...
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7336978 |
Mobile device having an overcurrent cutoff function
A mobile device having an overcurrent cutoff function. In a mobile device having at least one function module, the mobile device includes a main power supply which supplies power to the mobile...
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7312596 |
Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor
A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual...
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7298113 |
Battery pack
A detecting switch which is turned on/off in accordance with whether or not primary batteries have been attached to a primary battery holder is provided. In a normal state where no primary battery...
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7268520 |
Sense amplifier for use with wake-up charging current
A sense amplifier adapted to amplify a voltage signal representative of a charging current provided to a rechargeable battery. The sense amplifier may include a p-type input sense amplifier and an...
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7199537 |
Voltage converter control apparatus, and method
By using a target voltage Vc* of a capacitor connected to the output side of a DC/DC converter and a voltage Vb of a battery connected to the input side of the DC/DC converter, a duty ratio D as a...
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7170763 |
Apparatus and method for constant delta current control in a capacitor charger
In a capacitor charger, a transformer has a primary winding connected between an input voltage and a switch for generating a primary current flowing through the primary winding by switching the...
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7091697 |
System and method for efficiently implementing a battery controller for an electronic device
A system and method for effectively managing operating power for an electronic device may include a battery pack coupled to the electronic device for supplying operating power to the electronic...
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6930848 |
Back EMF voltage transducer/generator to convert mechanical energy to electrical energy for use in small disk drives
A mobile host device configured to draw electrical energy from an energy storage device includes a disk drive. The disk drive includes a disk drive enclosure including a base, a spindle motor...
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6828764 |
Regulator circuit and control method thereof
A regulator circuit capable of accurately adjusting output voltage anywhere in a current region and maintaining optimum output voltage by correcting setting of a predetermined voltage to be...
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6806671 |
Power supply system and power supply method
Power from a high voltage battery ( 10 ) (for example 36V) is supplied through an inverter ( 12 ) to a motor generator ( 14 ). A low voltage battery ( 20 ) (for example 12V) is connected through a...
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6798162 |
12/42 volt DC brush motor control system
A system 10 provides a variable output voltage to a DC brush motor. The system includes a DC brush motor 14 , a DC voltage source 12 , a step-up, step-down DC/DC converter 16 including a...
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6703796 |
Power supply and inverter used therefor
This invention relates to a power supply that integrates a rectifier/filter's circuitry and a converter's circuitry with an inverter to reduce space occupied and increase power efficiency. The...
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6583523 |
Parallel DC power sources with different characteristics
A method and structure for electric power management that economically satisfies peak power demand and immediately satisfies a sudden substantial increase in power demand. An electric power...
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6504340 |
Hands-free kit for mobile phones using solar cell
Disclosed herein is a hands-free kit for mobile phones using a solar cell. The hands-free kit has a solar cell, a charging unit, and a power switch. The solar cell is formed to be integrated with...
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6351110 |
Battery charger with current regulating circuit
A DC-DC converter including a current error amplifier and a voltage error amplifier connected in parallel to control the charging phase of the battery, during which a charging current is supplied...
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6337563 |
DC-DC converter and semicondutor integrated circuit device for DC-DC converter
A DC-DC converter generally includes a supply circuit, a charge circuit, and a control unit connected to the charge circuit. The charge circuit receives the input current and supplying a charge...
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6323608 |
Dual voltage battery for a motor vehicle
A single dual-voltage battery capable of powering an automobile system having electrical equipment that requires different supply voltage. The battery allows idle stop, assisted drive and...
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6263015 |
Analog/digital integrated subscriber circuit
An analog/digital integrated subscriber circuit includes a power supply part supplying power with respect to a subscriber line, and a signal processing part carrying out a signal processing. The...
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6208118 |
Far-distance remotely controllable rectifier with back-up battery
A far-distance remotely controllable rectifier with a back-up battery may be applied to any electric appliance that requires a rectifier, and particularly to a wireless phone or the like...
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6121756 |
Charger
An uninterruptible power supply (UPS) comprises a low voltage converter (02); a coupled inductor (60) comprising a first inductor (63) coupled to the battery, a second inductor (61) coupled to a...
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6118258 |
Electrical apparatus supplied by a photo-voltaic power source
An autonomous low power consumption electrical apparatus that has a supply device (8) comprising a single photo-voltaic cell, an electrical accumulator (7), and a voltage booster (10, 11, TR1, TR3)...
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6097109 |
Process and circuit layout for using an independent capacitor for the momentary retention of an output voltage when an input voltage is lost
Process and circuit layout for using an independent capacitor for the momentary retention of an output voltage when an input voltage is lost. To facilitate a reduction in capacitance in independent...
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6018229 |
Lithium-ion battery pack with integral switching regulator using cutoff transistor
A sealed rechargeable lithium-ion battery pack which includes a switching voltage regulator. The regulator uses the normal cutoff transistors as the switching devices, and also includes a discrete...
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6008629 |
Charging-and-discharging device for an electronic apparatus, and an electronic apparatus including the same, utilizing a charging device providing a constant charging current
A charging-and-discharging device in an electronic apparatus includes a rechargeable battery and a charging device for charging the battery. The charging-and-discharging device includes a switching...
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5994880 |
Giant magnetroresistive ratio sensing system
A magnetic sensing circuit is arranged in cooperative relation to a flyback transformer in a capacitor charging circuit for directly sensing the state of the transformer magnetic field for...
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5986436 |
Electric power recovering system
An electric power recovering system includes a switch disposed between a battery and a coil, and two diodes coupled between the coil and the battery. A capacitor is coupled between the diodes and...
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5949216 |
Dual mode battery chargers for portable electronic devices and related methods
A dual mode battery charger includes an input that accepts a DC power signal, and a switch that switches the DC power signal from the input responsive to a control signal to generate a charging...
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5850137 |
Charging apparatus and current/voltage detector for use therein
A charging apparatus having a power supply circuit that provides a DC output current via a sense resistor. A current detector amplifies, detects and provides a voltage across the sense resistor. A...
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5838553 |
Voltage stabilized self-oscillating power supply
In a self-oscillating power-supply circuit for charging a battery, the main switching transistor is turned off by a second switching transistor (T2) of an opposite conductivity type, which is...
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5821730 |
Low cost battery sensing technique
A low cost load sensing technique that is suitable for use in sensing batteries in a battery charging circuit is disclosed. The circuit is adapted to be utilized in conjunction with a power supply...
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5793189 |
Apparatus for preventing over-discharge of batteries used in an electric vehicle
To provide an electric vehicle in which a low voltage power, obtained by conversion from a high voltage power of a main battery by a DC--DC convertor, is supplied to an operation control unit and...
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5783930 |
Self-oscillating buck mode battery charger
A self-oscillating buck mode battery charger apparatus 10. The apparatus 10 includes a main switching transistor 22, a first control transistor 34 and a second control transistor 36. The control...
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5767660 |
Method and apparatus for charging and/or charge exchange between a plurality of series connected energy storage devices
A method of charging and/or transferring charge between a multiplicity of accumulators connected in series, the method includes connecting at least one electrical storage device in parallel to the...
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5739668 |
Charging control systems and circuits for recharging automobile batteries
A charging control unit 10 includes plug contacts 161, 162 and jack contacts 181, 182 for detecting connection of a charging plug 16 of a charger 12 to a receptacle 18, a current sensor 22 for...
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