Abstract: A switching power supply includes a switching element connected to a power supply voltage and performs ON and OFF operation; a control circuit; a coil; a capacitor connected to the coil and performs a rectifying operation with the coil; an oscillator to output an oscillator signal to the control circuit; a first comparator for comparing a current detection voltage which transforms a detection current flowing through the coil into a voltage, and the feedback voltage according to a difference of a voltage according to an output voltage with a reference voltage; and a second comparator for comparing a deep threshold voltage set as a value higher than the current detection voltage and is lower than the power supply voltage, with the feedback voltage. A Deep Simple Light Load Mode control is introduced to improve efficiency in a light or no-load area in addition to PWM mode in a heavy loading.

Abstract: A semiconductor integrated circuit device (IC1) comprises a semiconductor chip (CHIP1), a first frame lead (FR1), and a second frame lead (FR2). The semiconductor chip (CHIP1) includes common-base transistors (P1, P2), pads (T11, T12) connected to the respective emitters of the common-base transistors (P1, P2), pads (T21, T22) connected to the respective collectors of the common-base transistors (P1, P2), and a means (DRV, ERR, E1) for generating a base signal. The pads (T11, T12) are connected through the respective bonding wires (W11, W12) to the first frame lead (FR1). The pads (T21, T22) are connected through the respective bonding wires (W21, W22) to the second frame lead (FR2). This structure can easily detect breaking of the bonding wires connected in parallel.

Abstract: A switching regulator includes a first transistor and a second transistor connected in series between an input voltage and a reference voltage, an output terminal arranged to output an output voltage in accordance with a voltage appearing at a first connection point between the first and second transistors, a first control circuit arranged to output a first control signal and a second control signal to alternately turn on and off the first and second transistors, respectively, in accordance with the output voltage at the output terminal, a third transistor connected in parallel with the second transistor between the first connection point and the reference voltage, the third transistor being arranged to be controlled by the second control signal in common with the second transistor, an impedance element located between the third transistor and the reference voltage, and a second control circuit arranged to output a third control signal to turn off the second transistor prevailing over the second control signa

Abstract: A silicon reclamation apparatus with which a large amount of silicon can be easily recovered from a waste slurry is provided. The silicon reclamation apparatus of the present invention includes a solid-liquid separation part for obtaining solid substances for silicon recovery by solid-liquid separation of a concentrate of a waste slurry or the waste slurry which is discharged from a cutting device which cuts silicon or a polishing device which polishes silicon, with use of a slurry comprising abrasive grains and coolant; a washing part in which the solid substances for silicon recovery are washed with an organic solvent; and a classification part in which the solid substances for silicon recovery after the washing are classified to obtain a silicon-containing powder having a higher silicon content than before the classification.

Abstract: A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the other terminal grounded; first and second constant-current sources; a diode-connected reference transistor interposed between the first constant-current source and ground potential; and a sensing transistor interposed between the second constant-current source and the impedance element and having a control terminal connected with the control terminal of the reference transistor. The current direction detection circuit is small yet capable of minimizing power loss of a switching regulator.

Abstract: A switching power supply includes a switching element connected to a power supply voltage and performs ON and OFF operation; a control circuit; a coil; a capacitor connected to the coil and performs a rectifying operation with the coil; an oscillator to output an oscillator signal to the control circuit; a first comparator for comparing a current detection voltage which transforms a detection current flowing through the coil into a voltage, and the feedback voltage according to a difference of a voltage according to an output voltage with a reference voltage; and a second comparator for comparing a deep threshold voltage set as a value higher than the current detection voltage and is lower than the power supply voltage, with the feedback voltage. A Deep Simple Light Load Mode control is introduced to improve efficiency in a light or no-load area in addition to PWM mode in a heavy loading.

Abstract: An overcurrent detection circuit that minimizes fluctuations in the overcurrent detection level when the input supply voltage or temperature fluctuates includes a monitor transistor having a control terminal and an output terminal which are connected to a control terminal and an output terminal respectively of an output transistor, an output current detection transistor having a control terminal to which a detection bias voltage is input, and an output terminal which is connected to an input terminal of the monitor transistor, a constant current source that generates a reference current, a reference transistor having a control terminal to which the detection bias voltage is input and an output terminal to which the reference current flows to the constant current source, and a comparison circuit that outputs an overcurrent detection signal by comparing the voltage of the output terminal of the output current detection transistor and the voltage of the output terminal of the reference transistor.

Abstract: A semiconductor integrated circuit device (IC1) comprises a semiconductor chip (CHIP1), a first frame lead (FR1), and a second frame lead (FR2). The semiconductor chip (CHIP1) includes common-base transistors (P1, P2), pads (T11, T12) connected to the respective emitters of the common-base transistors (P1, P2), pads (T21, T22) connected to the respective collectors of the common-base transistors (P1, P2), and a means (DRV, ERR, E1) for generating a base signal. The pads (T11, T12) are connected through the respective bonding wires (W11, W12) to the first frame lead (FR1). The pads (T21, T22) are connected through the respective bonding wires (W21, W22) to the second frame lead (FR2). This structure can easily detect breaking of the bonding wires connected in parallel.

Abstract: A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the other terminal grounded; first and second constant-current sources; a diode-connected reference transistor interposed between the first constant-current source and ground potential; and a sensing transistor interposed between the second constant-current source and the impedance element and having a control terminal connected with the control terminal of the reference transistor. The current direction detection circuit is small yet capable of minimizing power loss of a switching regulator.

Abstract: The present invention provides an overcurrent detection circuit capable of suppressing fluctuations in the overcurrent detection level when the input supply voltage or temperature fluctuates.

Abstract: A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the other terminal grounded; first and second constant-current sources; a diode-connected reference transistor interposed between the first constant-current source and ground potential; and a sensing transistor interposed between the second constant-current source and the impedance element and having a control terminal connected with the control terminal of the reference transistor. The current direction detection circuit is small yet capable of minimizing power loss of a switching regulator.

Abstract: A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the other terminal grounded; first and second constant-current sources; a diode-connected reference transistor interposed between the first constant-current source and ground potential; and a sensing transistor interposed between the second constant-current source and the impedance element and having a control terminal connected with the control terminal of the reference transistor. The current direction detection circuit is small yet capable of minimizing power loss of a switching regulator.

Abstract: After a current value flowing through a coil L is detected, it is converted into a voltage value, is then inputted to an inverting input terminal of a comparator 4, and is then compared with a voltage indicating the difference between the value of a fed back output voltage and a reference voltage. A voltage source 20 is provided at the inverting input terminal of the comparator 4 so that an offset voltage is added to the voltage value to be inputted to the inverting input terminal of the comparator 4.

Abstract: A power supply device has a DC/DC converter producing an intermediary voltage from an input voltage, a series regulator producing a desired output voltage from the intermediary voltage, an output current monitoring circuit monitoring the output current flowing through the series regulator, and an intermediary voltage adjustment circuit adjusting the feedback control of the DC/DC converter such that, as the monitored output current increases, the intermediary voltage increases and that, as the monitored output current decreases, the intermediary voltage decreases. This configuration offers high efficiency over the entire load range.

Abstract: After a current value flowing through a coil L is detected, it is converted into a voltage value, is then inputted to an inverting input terminal of a comparator 4, and is then compared with a voltage indicating the difference between the value of a fed back output voltage and a reference voltage. A voltage source 20 is provided at the inverting input terminal of the comparator 4 so that an offset voltage is added to the voltage value to be inputted to the inverting input terminal of the comparator 4.

Abstract: A power supply device has a soft starting circuit 12, which is composed of a transistor Tr9 having its emitter connected to the emitter of a transistor Tr1 of which the base serves as a non-inverting input terminal of a comparator 11 and having its collector grounded, a clamp circuit 10 connected between the base of the transistor Tr1 and the base of the transistor Tr9, a constant-current source 7 receiving a supply voltage Vcc through a switch 2, a capacitor Cs having one end connected to the base of the transistor Tr9 and having the other end grounded, a switch 9 connected to the capacitor Cs, having its contact “c” connected to the constant-current source 7, and having its contact “d” connected to a discharge circuit 8, and the discharge circuit 8.

Abstract: In conventional cases, when connecting a capacitor having a low equivalent series resistance (ESR) to an output terminal of a semiconductor device as a phase compensation capacitor, an external resistor connected in series therewith is required. A semiconductor device of the present invention comprises a resistor that is formed within the semiconductor device and of which one end is connected to the output terminal for compensating for a low ESR component, and a capacitor connection terminal to which another end of the resistor is connected. The resistor thus arranged compensates for the low ESR component of a low-ESR capacitor that is connected externally to the capacitor connection terminal.

Abstract: In conventional cases, when connecting a capacitor having a low equivalent series resistance (ESR) to an output terminal of a semiconductor device as a phase compensation capacitor, an external resistor connected in series therewith is required. A semiconductor device of the present invention comprises a resistor that is formed within the semiconductor device and of which one end is connected to the output terminal for compensating for a low ESR component, and a capacitor connection terminal to which another end of the resistor is connected. The resistor thus arranged compensates for the low ESR component of a low-ESR capacitor that is connected externally to the capacitor connection terminal.

Abstract: A power supply device that feeds electric power to an output terminal that is to be connected to a load has first and second PNP-type transistors having their emitters connected to a supplied power line. The collector of the first transistor is connected to the output terminal, and is connected also through two serially connected resistors to ground. An operational amplifier controls the first and second transistors in such a way that the voltage at the node between the two serially connected resistors is kept equal to a setting voltage. To achieve this, a control current is fed to the bases of the first and second transistors. In accordance with the collector current of the second transistor, a limiter circuit limits the output current of the first transistor. The limiter circuit controls the first transistor through the operational amplifier. Between the collectors of the first and second transistors, a capacitor is connected.