| LEADTREND TECHNOLOGY CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20100046262 | Control Apparatus and Control Method for a Power Factor Correction Power Converter - A control apparatus and a control method for a power factor correction power converter are provided. The control apparatus is configured to reduce the variation rate of a reference signal with a rising portion and a falling portion. When the primary winding almost completely releases the stored energy, and the falling portion of the reference signal reaches a determined condition, the control apparatus turns on a switch for increasing the stored energy of the primary winding. | 02-25-2010 |
| 20100046261 | Apparatus and Method for Zero-Voltage Region Detection - An apparatus and a method for detecting zero-voltage region detection are provided. The apparatus for zero-voltage region detection is configured to detect whether an input voltage approaches a zero voltage through an auxiliary winding, and to detect whether a primary winding almost completely releases the stored energy through the auxiliary winding. | 02-25-2010 |
