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| Number | Title | Issue Date |
| 7616454 | Control circuit having programmable waveform for limiting output power of power converter A control circuit having a programmable waveform for the output power limit comprises an oscillation circuit to generate an oscillation signal. The oscillation signal is used for producing a switching signal to control a switching device in response to a feedback si... | 11/10/2009 |
| D590339 | Controller with DC brushless motor | 04/14/2009 |
| 7489532 | Apparatus and method for a power converter with feed-forward voltage compensation to enable a PFC circuit Apparatus and method for a power converter with feed-forward voltage compensation to enable a PFC circuit are proposed. A voltage divider and a feedback unit output a compensation voltage and a feedback voltage in response to an input voltage and an output voltage, ... | 02/10/2009 |
| 7486493 | Over-power protection circuit for power converter The present invention proposes an over-power protection apparatus for a power converter. An oscillator outputs a clock signal. By comparing a sense signal with a threshold signal, an over-power comparative unit outputs a protection signal to an accumulating trigger ... | 02/03/2009 |
| 7466569 | Power converter having phase lock circuit for quasi-resonant soft switching The present invention provides a power converter having a phase lock circuit for quasi-resonant soft switching. The power converter includes a first circuit coupled to the feedback signal to generate a switching signal for switching a switching device and regulating... | 12/16/2008 |
| 7426120 | Switching control circuit having a valley voltage detector to achieve soft switching for a resonant power converter The present invention provides a switching control circuit having a valley voltage detector to achieve the soft switching and improve the efficiency of a power converter. The switching control circuit includes a control circuit coupled to the feedback signal to gene... | 09/16/2008 |
| 7368895 | Apparatus for a power supply with brownout protection and the protecting method for the same An apparatus for a power supply with brownout protection and the method thereof are proposed. As a brownout condition occurs, the apparatus informs at least one microprocessor to process the shutdown process timely. The apparatus includes a power factor correction (... | 05/06/2008 |
| 7259525 | High efficiency switching LED driver The present invention provides a LED driver for control the brightness of the LED. An inductor and a switch are connected in serial with the LED for control the current of the LED. A control circuit is developed to generate a control signal for switching the switch ... | 08/21/2007 |
| 7256675 | Energy transfer apparatus for reducing conductivity electromagnetic interference and manufacturing method thereof An energy transfer apparatus is developed for reducing a conductivity electromagnetic interference and manufacturing method. The energy transfer apparatus comprises a core, an input winding, an output winding, a supply voltage and a supply winding. The supply windin... | 08/14/2007 |
| 7245090 | Switching LED driver with temperature compensation to program LED current The present invention provides a LED driver for control the brightness of the LED. An energy-transferred element and a switch are connected in series with the LED for controlling the current of the LED. A diode is coupled to the energy-transferred element for freewh... | 07/17/2007 |
| 7245089 | Switching LED driver The present invention provides a LED driver for controlling the brightness of the LED. An inductor and a switch are connected in series with the LED for controlling the current of the LED. A diode is coupled in parallel to the inductor for freewheeling the energy of... | 07/17/2007 |
| 7149098 | Over-power protection apparatus with programmable over-current threshold An over-power protection apparatus with programmable over-current threshold for a power converter is provided. The over-power protection apparatus further provides an over-temperature threshold for protection purposes. The over-power protection apparatus is able to ... | 12/12/2006 |
| 7133300 | Over-voltage protection circuit for power converter The present invention proposes an over-voltage protection apparatus for a power converter. The over-voltage protection apparatus has an oscillator outputting a clock signal. Simultaneously, by comparing a sense signal with a threshold signal, an over-voltage compara... | 11/07/2006 |
