Patent application number | Description | Published |
20130063996 | POWER SUPPLY APPARATUS - A power supply apparatus includes: an input terminal to which alternating current power is input; a positive terminal and a negative terminal at which direct-current power is output; a rectifier circuit configured to rectify the alternating current power input to the input terminal; an inductor coupled to the rectifier circuit; a capacitor coupled between the positive terminal and the negative terminal; a first rectifying element coupled between an output terminal of the inductor and the positive terminal; a first switching element coupled between an input terminal of the first rectifying element and the negative terminal; a second switching element and a transformer coupled in parallel to the first switching element; a second rectifying element coupled between the positive terminal and a coupling portion of the second switching element and the transformer; and a third rectifying element coupled between the transformer and the positive terminal. | 03-14-2013 |
20130080798 | POWER SUPPLY SWITCHING APPARATUS - A power supply switching apparatus includes a controller and a switch. The controller includes a first comparator, an integrator circuit and a second comparator. The first comparator is configured to output a binary signal having a level corresponding to a magnitude of a signal input from the power supply being connected thereto. The integrator circuit is configured to integrate an output from the first comparator. The second comparator is configured to output a binary signal having a level corresponding to a magnitude of a single input from the integrator circuit. The switch has an input side connected to the first and the second power supply and is configured to switch an outputting current between a current supplied from the first power supply and a current supplied from the second power supply in accordance with a value of the signal output from the second comparator. | 03-28-2013 |
20130127518 | CONTROL CIRCUIT AND ELECTRONIC DEVICE - A control circuit includes: a first switching element having a source, a gate, and a drain; a battery configured to supply a voltage to the gate through a second switching element; a PWM signal generator circuit configured to supply a PWM signal to the gate through a third switching element; and a gate control circuit configured to, under a power-off condition, turn on the second switching element to supply the voltage of the battery to the gate and turns off the third switching element, and configured to under a power-on condition, turn on the third switching element to supply the PWM signal voltage to the gate and turns off the second switching element. | 05-23-2013 |
20140169051 | POWER SUPPLY DEVICE - A power supply device includes: a first serial circuit coupled between a first output terminal and a second output terminal, and including a first switching element and a first rectification element; a second serial circuit coupled between the first output terminal and the second output terminal, and including a second switching element and a second rectification element; a third switching element inserted between a connection point between a first inductor and a first input terminal, and a second output terminal; a fourth switching element inserted between a connection point between a second inductor and a second input terminal, and the second output terminal; a control circuit configured to control the first and second switching elements; and a synchronous rectification control circuit configured to control the third and fourth switching elements. | 06-19-2014 |
20140368059 | TRANSFORMER, ELECTRONIC APPARATUS, AND METHOD FOR CONTROLLING TRANSFORMER - A transformer includes a core, a coil wound around the core, and a heat sink coupled to the coil. An electronic apparatus includes: a transformer that includes a core, a coil wound around the core, and a heat sink coupled to the coil; a temperature sensor that measures a temperature of the heat sink; and a controller that controls power to be supplied to the coil based on the temperature measured by the temperature sensor. | 12-18-2014 |
20150048686 | POWER SUPPLY UNIT - A power supply unit includes: a relay that includes a first input terminal to which primary alternating-current power is input and a second input terminal to which secondary alternating-current power is input, and outputs one of the primary alternating-current power and the secondary alternating-current power; a first power conversion unit that is coupled to an output terminal of the relay, and converts alternating-current power output from the relay, into direct-current power; a second power conversion unit that is coupled to an output side of the first power conversion unit and converts output power of the first power conversion unit into direct-current power of a predetermined voltage; a power output terminal that outputs the direct-current power converted by the second power conversion unit; and a control unit that couples the first input terminal to the output terminal or couples the second input terminal to the output terminal. | 02-19-2015 |
20150200050 | INDUCTOR APPARATUS AND INDUCTOR APPARATUS MANUFACTURING METHOD - An inductor apparatus includes: a substrate including an electrical insulation property and a non-magnetic material; and a plurality of inductors disposed in the substrate so as to extend from a first surface of the substrate to a second surface of the substrate, each of the plurality of inductors including: an inductor conductive part that has an electrical conductivity and extends in a thickness direction of the substrate; and a magnetic layer that covers a side of the inductor conductive part and include a relative permeability and a soft magnetic material. | 07-16-2015 |
20150207409 | POWER SUPPLY DEVICE - A power supply device has a first delay circuit which delays a first clock signal and outputs a second clock signal, a pulse signal generating circuit which generates a first pulse signal, a first transistor which connects an output node to a power supply potential node according to the first pulse signal, a second transistor which connects the output node to a reference potential node according to the first pulse signal, an integration circuit which integrates and outputs a signal of the output node, and a comparator which compares an output signal of the integration circuit and the reference signal, wherein the pulse signal generating circuit generates the first pulse signal in synchronization with the first clock signal, the second clock signal and the output signal of the comparator, and the frequency of the first pulse signal is constant irrespective of voltage of the output node. | 07-23-2015 |