Patent application number | Description | Published |
20100110599 | OVERCURRENT PROTECTION APPARATUS - An overcurrent protection apparatus which, when a layer short or a dead short occurs in a load circuit, interrupts the circuit in accordance with respective situations, whereby the load circuit is protected is provided. The apparatus includes a first overcurrent detecting section for detecting a counter electromotive force generated in a power supply wiring, and a second overcurrent detecting section, disposed in each of the plural load circuits, for detecting that a load current ID becomes an overcurrent. The apparatus includes a delaying section for outputting a delay signal at a first delay time when an overcurrent is detected by the second overcurrent detecting section, and for outputting the delay signal at a second delay time which is shorter than the first delay time when an overcurrent is detected by both of the first overcurrent detecting section and the second overcurrent detecting section. According to the configuration, in the case of the occurrence of a layer short, the load circuit can be interrupted at the first delay time, and, in the case of the occurrence of a dead short, the load circuit can be interrupted at the second delay time. | 05-06-2010 |
20100327794 | MOTOR LOAD CONTROL APPARATUS - A motor load control apparatus capable of suppressing heat generation of an electronic switch and suppressing occurrence of noise associated with rotation of a fan and vibration of the fan is provided. A switch section ( | 12-30-2010 |
20110019323 | PROTECTIVE DEVICE FOR LOAD CIRCUIT - A protective device for a load circuit as instantly cuts off only the load circuit and protects this load circuit in a case where a dead short-circuit has occurred in the load circuit, is provided. | 01-27-2011 |
20110075309 | OVERCURRENT PROTECTION APPARATUS FOR LOAD CIRCUIT - To provide an overcurrent protection apparatus for a load circuit which can detect an overcurrent accurately without being influenced by the offset voltage Voff of an amplifier (AMP | 03-31-2011 |
20110085275 | OVERCURRENT PROTECTION APPARATUS FOR LOAD CIRCUIT - An overcurrent protection apparatus for a load circuit can detect an overcurrent with a high accuracy without being influenced by a deviation ±ΔRon of the on-resistance of a semiconductor element (T | 04-14-2011 |
20110221376 | POWER SUPPLY DEVICE - To provide a power supply device which can reduce energy loss caused due to the forward-direction voltage of a flywheel diode. In a load circuit for subjecting an electronic switch T | 09-15-2011 |
Patent application number | Description | Published |
20100118461 | OVERCURRENT PROTECTION APPARATUS FOR LOAD CIRCUIT - To provide an overcurrent protection apparatus which can surely protect a load circuit from an overcurrent with a simple configuration. Supposing that the temperature increasing amount of a semiconductor element caused when the semiconductor element is turned on is ΔTch, the on-resistance value of the semiconductor element (T | 05-13-2010 |
20100264887 | BOOSTER DEVICE - A booster device for increasing a voltage at a voltage supply point of a power supply circuit for supplying a driving voltage to an electronic control circuit is provided. The power supply circuit includes a series-connected circuit having a diode, a resistor, and a capacitor which is connected to a DC power supply. One end of the capacitor is connected to a ground and a connection point of the resistor and the capacitor serves as the voltage supply point. The booster device includes a clamp circuit, an oscillation circuit, and a booster circuit that increase a voltage output from the DC power supply. When the voltage at the voltage supply point falls below a predetermined threshold voltage, the booster device supplies the increased voltage at the voltage supply point. | 10-21-2010 |
20120153914 | LOAD CONTROL APPARATUS - A load control apparatus is provided in which a circuit of detecting an overcurrent can be correctly operated even if a first capacitor (C | 06-21-2012 |
20120162846 | HEAT GENERATION INHIBITING CIRCUIT FOR EXCITING COIL IN RELAY - A resistor is provided between an exciting coil and the ground, and a diode is provided between a point p | 06-28-2012 |