Abstract: A commercially available power source is rectified by a diode bridge and a capacitor and supplied to a transformer via a terminal. One end of a primary coil is connected to the terminal and the other end is connected to a switching device. One end of a feedback coil is connected to the switching device and the other end is connected to the terminal. A negative feedback circuit is provided between the switching device and the terminal. A rectifying circuit comprising a diode and a capacitor is provided on a secondary coil. A node of the coil and the capacitor is connected to the terminal via a resistor. In detecting circuits, a voltage across the terminal is detected and a current across the resistor is detected. When the detected voltage and current are equal to predetermined values, a control signal is supplied to a feedback circuit.

Abstract: A solenoid type switch has at least two driving coils. The driving coils turn off a switch with a current for example an overcurrent that flows in the switch. The driving coils are magnetized or demagnetized by a driving circuit so as to turn on or off the switch. The driving circuit magnetizes or demagnetizes the driving coils in accordance with a control signal supplied from a controlling circuit. Thus, the switch can be turned off with the current that flows in the driving coils.

Abstract: A commercially available power source is rectified by a diode bridge and a capacitor and supplied to a transformer via a terminal. One end of a primary coil is connected to the terminal and the other end is connected to a switching device. One end of a feedback coil is connected to the switching device and the other end is connected to the terminal. A negative feedback circuit is provided between the switching device and the terminal. A rectifying circuit comprising a diode and a capacitor is provided on a secondary coil. A node of the coil and the capacitor is connected to the terminal via a resistor. In detecting circuits, a voltage across the terminal is detected and a current across the resistor is detected. When the detected voltage and current are equal to predetermined values, a control signal is supplied to a feedback circuit.

Abstract: A commercially available power source is rectified by a diode bridge and a capacitor and supplied to a transformer via a terminal. One end of a primary coil is connected to the terminal and the other end is connected to a switching device. One end of a feedback coil is connected to the switching device and the other end is connected to the terminal. A negative feedback circuit is provided between the switching device and the terminal. A rectifying circuit comprising a diode and a capacitor is provided on a secondary coil. A node of the coil and the capacitor is connected to the terminal via a resistor. In detecting circuits, a voltage across the terminal is detected and a current across the resistor is detected. When the detected voltage and current are equal to predetermined values, a control signal is supplied to a feedback circuit.

Abstract: A driving circuit is disclosed. The driving circuit comprises a secondary battery cell having a positive electrode and a negative electrode; first and second N type field effect transistors each having a gate, a drain, and a source; first and second switching devices, connected between the gates of the first and second N type field effect transistors and the negative electrode side of the secondary battery cell, for turning on and off the first and second N type field effect transistors; driving means for controlling the first and second switching devices; first and second output terminals; and a diode having an anode and a cathode.

Abstract: A commercially available power source is rectified by a diode bridge and a capacitor and supplied to a transformer via a terminal. One end of a primary coil is connected to the terminal and the other end is connected to a switching device. One end of a feedback coil is connected to the switching device and the other end is connected to the terminal. A negative feedback circuit is provided between the switching device and the terminal. A rectifying circuit comprising a diode and a capacitor is provided on a secondary coil. A node of the coil and the capacitor is connected to the terminal via a resistor. In detecting circuits, a voltage across the terminal is detected and a current across the resistor is detected. When the detected voltage and current are equal to predetermined values, a control signal is supplied to a feedback circuit.

Abstract: When an output voltage of a secondary battery cell E1 is obtained, only SW1 and SW2 are turned on. As a result, a capacitor C1 is charged by a secondary battery cell E1. With a delay of a time period ÄT, SW1 and SW2 are turned off. SW4 and SW5 are turned on. As a result, electric charges of the capacitor C1 are moved to a capacitor C2. Those operations are repeated until the potential of the capacitor C2 becomes almost equal to the output voltage of the secondary battery cell E1. When the potential of the capacitor C2 becomes almost equal to the output voltage of the capacitor C2, the potential of the capacitor C2 is detected by the voltage detector 11. A first terminal of the capacitor C2 is connected to a ground potential. As a result, the voltage of the secondary battery cell E1 can be stably detected. When the secondary battery cell E2 is detected, only SW5 is turned on. As a result, the capacitor C2 is charged by the secondary battery cell E2.

Abstract: In the case of charging by a charging apparatus having a plurality of input terminals to which external power sources for charging a secondary battery are inputted, it is prevented that a current of the inputted power source is outputted to the outside from the other input terminals for charging which are not used. If there are inputs from a plurality of input terminals, the input power sources are controlled so that the battery is optimally charged. pnp-type transistors Q1 and Q2 are arranged between two input terminals of a terminal 11 for an external power adaptor and a terminal 12 for a holder and a secondary battery E1, respectively. When a control IC 13 detects an input power voltage of one of the transistors, the transistor on the detected side is turned on. If the control IC 13 detects both input power voltages, a priority is allocated under predetermined conditions and the secondary battery E1 is charged by the power source of the higher priority.

Abstract: A battery pack BP having terminals T1, T2, and T3, a detecting circuit, a signal generating circuit, a temperature, voltage, and current detecting circuit, a switching circuit, and a secondary battery connected to the switching circuit. A first external signal generating unit may be connected to terminals T1 and T2 and a second external signal generating unit may be connected to terminals T2 and T3. The detecting circuit detects whether the first or second external signal generating units has been connected. In so doing, the detecting circuit may detect an impedance of the first external signal generating unit and may detect a terminal voltage of the second external signal generating unit. The on/off operations of the switching circuit SW may be controlled in accordance with the detection result.

Abstract: To reduce errors and decrease loss, the detecting range of current is enlarged and the current is independently detectable. A rectified voltage and a rectified current are supplied from an input terminal. Resistors 1 and 2 are serially connected between the input and output terminals. A load is connected to the output terminal. Between an emitter and collector of the transistor are resistor 1 and a constant current detecting circuit 5. The transistor base is connected to a control circuit that controls the transistor switching operations. The constant current detecting circuit 5 detects current from the voltage across resistor 1. A current detecting circuit 6 detects current from the voltage across resistor 2. A signal is supplied to the control circuit when the constant current detecting circuit 5 detects small current. The control circuit supplies a signal to the transistor base that increases transistor impedance.

Abstract: A power source unit is constructed by an AC/DC switching power source circuit 12, a battery unit 16, switching circuits 13 and 15, detecting circuits 18 and 21 corresponding to the switching circuits 13 and 15, and stop signal forming circuits 19 and 20. In the supplying mode, the power source circuit 12 is made operative, the switching circuit 13 is turned on, an output voltage formed by the power source circuit 12 is supplied to the load side, and at the same time, the switching circuit 15 is turned off by a stop output from the stop signal forming circuit 20. In the charging mode, the power source circuit 12 is made operative, the switching circuit 15 is turned on, the output voltage formed by the power source circuit 12 is supplied to the battery unit 16, and at the same time, the switching circuit 13 is turned off by a stop output of the stop signal forming circuit 19.

Abstract: An intermittent pulse generator 1 is provided between terminals Ti1 and Ti2. In the intermittent pulse generator 1, pulses are generated from an AC power source which is supplied and the generated pulses are supplied to a controller 3. The controller 3 controls a switching circuit 2 in accordance with the pulses from the intermittent pulse generator 1 and a signal from a supplying mode detecting circuit 9. A rectifying circuit constructed by a diode bridge 5 and a capacitor 6 is provided for the secondary side of a transformer 4. An output of the rectifying circuit is supplied to an energy saving mode detecting circuit 7 and a supplying mode detecting circuit 9. The energy saving mode detecting circuit 7 is connected to an output terminal To through a switching circuit 8. When the energy saving mode is detected in the energy saving mode detecting circuit 7, a signal is supplied to the intermittent pulse generator 1.

Abstract: A primary winding T1 and a switching circuit 1 are serially inserted between input terminals Ti1 and Ti2 to which an alternating current is supplied. A diode 2, a resistor 3, and a capacitor 4 are serially inserted in parallel with the primary winding T1. A detecting circuit 5 is connected to both ends of the capacitor 4 and to an emitter and a collector of a phototransistor 7b. A control circuit 6 controls the switching circuit 1. A diode bridge 8 and a capacitor 9 are provided for a secondary winding T2. Output terminals To1 and To2 are connected to both ends of the capacitor 9. A voltage detecting circuit 10 is provided in parallel with the capacitor 9. The voltage detecting circuit 10 detects voltages which are outputted from the output terminals To1 and To2 and supplies the detected voltages to a control circuit 11. The control circuit 11 controls a light emitting diode 7a.

Abstract: A rectified commercially available power source is supplied to one end of a primary coil T1 of a transformer T through a terminal TM1. A capacitor C for rectifying is provided between the terminal TM1 and the ground. A switching device X is provided between the other end of the primary coil T1 and the ground. A power source obtained from a terminal TM3 is supplied as a power source for driving oscillators O1 and O2, PWM circuits P1 and P2, and a driving circuit D. The oscillator O1 supplies a signal based on a preset frequency f1 to the circuit P1. In the circuit P1, a switching signal having a predetermined duty ratio according to the supplied signal is supplied to the circuit D through a switching circuit SW1. In the circuit D, the supplied switching signal is amplified and supplied to a control terminal of the switching device X.

Abstract: A detecting range of a current is enlarged and the current can be independently detected, so that errors can be reduced and the loss can be also decreased. A rectified voltage and a rectified current are supplied from an input terminal Ti. Resistors 1 and 2 are serially connected between the input terminal Ti and an output terminal To. A load is connected to the output terminal To. The resistor 1 is provided between an emitter and a collector of the transistor 3 and a constant current detecting circuit 5 is also provided between them. A base of the transistor 3 is connected to a control circuit 4 and the on/off operations of the transistor 3 are controlled by the control circuit 4. The constant current detecting circuit 5 detects a current from a voltage across the resistor 1. A current detecting circuit 6 is connected to both ends of the resistor 2 and detects a current from a voltage across the resistor 2. The constant current detecting circuit 5 detects a small current.

Abstract: A primary winding T1 and a switching circuit 1 are serially inserted between input terminals Ti1 and Ti2 to which an alternating current is supplied. A diode 2, a resistor 3, and a capacitor 4 are serially inserted in parallel with the primary winding T1. A detecting circuit 5 is connected to both ends of the capacitor 4 and to an emitter and a collector of a phototransistor 7b. A control circuit 6 controls the switching circuit 1. A diode bridge 8 and a capacitor 9 are provided for a secondary winding T2. Output terminals To1 and To2 are connected to both ends of the capacitor 9. A voltage detecting circuit 10 is provided in parallel with the capacitor 9. The voltage detecting circuit 10 detects voltages which are outputted from the output terminals To1 and To2 and supplies the detected voltages to a control circuit 11. The control circuit 11 controls a light emitting diode 7a.

Abstract: A battery pack BP is constructed by terminals T1, T2, and T3, a detecting circuit 1, a signal generating circuit 2, a temperature, voltage, and current detecting circuit 3, a switching circuit SW, and a secondary battery BT. An external signal generating unit 4 is connected to the terminals T1 and T2. An external signal generating unit 5 is connected to the terminals T2 and T3. The detecting circuit 1 detects that the external signal generating unit 4 or 5 has been connected. The on/off operations of the switching circuit SW are controlled in accordance with a detection result. The temperature, voltage, and current detecting circuit 3 detects a temperature of the battery pack BP and a terminal voltage and a current of the secondary battery BT. The on/off operations of the switching circuit SW are controlled on the basis of the detected temperature, voltage, and current. A signal is supplied to the signal generating circuit 2 on the basis of the detected temperature, voltage, and current.

Abstract: A rectifying circuit (a) comprising a diode Da and a capacitor Ca is provided for a winding Ta on the secondary side of a transformer T. A rectifying circuit (b) comprising Db and Cb is provided for a winding Tb. A charging device Ra connected to one output of the circuit (a) is connected to the + side of a secondary battery E1. The + side of E1 is connected to an output terminal To1 and the + side of E3 through a switching circuit S1. The − side of E1 is connected to the other output of the circuit (a) and connected to the − side of E3 through S2. Rb connected to one output of the circuit (b) is connected to the + side of E2. The + side of E2 is connected to the + side of E4 through S2. The − side of E2 is connected to the other output of the circuit (b) and connected to the − side of E4 through S3. The − side of E4 is connected to an output terminal To2. S4 is provided between the + side of E1 and the − side of E4.

Abstract: A rectified commercially available power source is supplied to one end of a primary coil T1 of a transformer T through a terminal TM1. A capacitor C for rectifying is provided between the terminal TM1 and the ground. A switching device X is provided between the other end of the primary coil T1 and the ground. A power source obtained from a terminal TM3 is supplied as a power source for driving oscillators O1 and O2, PWM circuits P1 and P2, and a driving circuit D. The oscillator O1 supplies a signal based on a preset frequency f1 to the circuit P1. In the circuit P1, a switching signal having a predetermined duty ratio according to the supplied signal is supplied to the circuit D through a switching circuit SW1. In the circuit D, the supplied switching signal is amplified and supplied to a control terminal of the switching device X.

Abstract: A battery cartridge has a communication terminal from which control signals are sent to a charging adapter to deliver various pieces of information necessary for electrically charging the battery cartridge, such as charging stop information, capacity information, full charge information, battery defect information, and so on. Different kinds of charging modes can be distinguished by detecting a property curve of a charge voltage or a charge current input to the battery cartridge. In this manner, without reducing the whole number of pieces of information, the number of control signals from the communication terminal can be reduced.