| Patent application number | Description | Published |
|---|
| 20080203932 | LED CONTROL METHOD AND STRUCTURE - In one embodiment, an LED system is controlled to have a substantially unity power factor. | 08-28-2008 |
| 20090051296 | LED CONTROL METHOD - In one embodiment, an LED system is controlled to have a substantially unity power factor. | 02-26-2009 |
| 20090160528 | METHOD FOR REGULATING TEMPERATURE - A method and circuit for managing thermal performance of an integrated circuit. Temperature sensing circuits and a plurality of power FETs that are coupled together in parallel are manufactured from a semiconductor substrate. Each temperature sensing circuit monitors the temperature of the portion of the semiconductor substrate near or including a corresponding power FET. When the temperature of the semiconductor substrate near one or more of the power FETs reaches a predetermined value, the corresponding temperature sensing circuit reduces a voltage appearing on the gate of the power FET. The reduced voltage increases the on-resistance of the power FET and channels a portion of its current to others of the plurality of power FETs. The power FET continues operating but with a reduced current flow. When the temperature of the semiconductor substrate falls below the predetermined value, the gate voltage of the power FET is increased to its nominal value. | 06-25-2009 |
| 20090315585 | TRANSISTOR DIAGNOSTIC CIRCUIT - In one embodiment, a diagnostic circuit is used to test the on-resistance of a transistor. | 12-24-2009 |
| 20100127666 | MULTIPLE MODE BATTERY CHARGER - A battery charger circuit includes a transistor having a first current electrode for receiving a charging voltage, a control electrode for receiving a control signal, and a second current electrode for providing an output voltage. The battery charger circuit further includes a rectifier having a terminal coupled to the second current electrode of the transistor, and another terminal coupled to a power supply voltage terminal. The battery charger circuit also includes a control and regulation circuit having an input for receiving a feedback signal representative of a temperature, and an output for providing the control signal. The control and regulation circuit operates in either a switching mode or a linear mode in response to the feedback signal. | 05-27-2010 |
| 20100296210 | TRANSIENT SUPPRESSION DEVICE AND METHOD THEREFOR - In one embodiment, a semiconductor device to provide protection for electronic circuits, the semiconductor device typically includes a vertical MOS transistor, a reference circuit, and an amplifier. The amplifier amplifies the reference voltage to enable the vertical MOS transistor responsively to a transient event. | 11-25-2010 |
| 20110080207 | METHOD FOR REGULATING TEMPERATURE AND CIRCUIT THEREFOR - A method and circuit for managing thermal performance of an integrated circuit. In accordance with an embodiment, a thermal limit circuit and a semiconductor device are manufactured from a semiconductor material, wherein the thermal limit circuit is configured to operate at a temperature level that is different from a threshold temperature in response to the thermal sensing element sensing a temperature at least equal to the threshold temperature. | 04-07-2011 |
| 20110133787 | CIRCUIT AND METHOD FOR DETERMINING A CURRENT - A power supply circuit having a converter circuit and method for determining a current flowing into the converter circuit. A converter circuit includes an amplifier and a current-to-current converter module. The amplifier has a current sensing element coupled between its inverting and noninverting input terminals. The amplifier generates a sensing signal from a charging current flowing through the current sensing element. The sensing signal is input into the current-to-current converter module, which scales the charging current and modulates the scaled charging current. The current-to-current converter module converts the modulated current to a charging voltage that is representative of the charging current. The charging current is converted to a current that is representative of the input current to converter circuit. The input current to the converter circuit is added to an auxiliary load current to yield the current of the power supply circuit. | 06-09-2011 |
