Dialog Semiconductor Gmbh

Laiqing Ping

Nan Shi

Xiaoyan Wang

Wenduo Liu

Kun Yang

Naidong Xu

A flyback converter communication channel is provided that comprises a pair of capacitors. A transmitter on a first side of a transformer for the flyback converter transmits a transmitter signal over a first one of the capacitors. The transmitter also transmits a complement of the transmitter signal over a second one of the capacitors. A receiver on a second side of the transformer controls a switch transistor responsive to a high-pass-filtered difference of the received signals from the pair of capacitors.

Flyback converter with edge-based isolated communication

The feedback loop of a switching power converter controller is provided with an averaging circuit that averages either an output voltage, an error signal, or a control voltage. Regardless of which feedback signal is averaged, the averaging occurs over a first cycle of a rectified input voltage to form an averaged signal that is used by the feedback loop in a subsequent cycle of the rectified input voltage.

Switching power converter with improved power factor correction via feedback signal averaging

A system for improving a power factor (PF) of a power converter in signal communication with a rectifier and an electromagnetic interference capacitor is disclosed. The system includes a controller and a threshold detector. The threshold detector is configured to measure and compare a rectified voltage against a threshold voltage and the controller is configured to set the power converter to a stop-mode. The power converter is set to the stop-mode at a stop-time that is less than a first zero-crossing time. The controller is further configured to set the power converter to a run-mode at a time that is past the first zero-crossing time.

System and method for improving power factor and THD of a switching power converter

An adaptive pulse frequency modulation for a switching power converter is provided that varies the switching frequency across a cycle of a rectified input voltage for the switching power converter From a beginning of the cycle of the rectified input voltage, the switching frequency decreases from a maximum value to a minimum value at a mid-point of the cycle and then increases from the mid-point back to the maximum value at an end of the cycle.

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Campbell, CA, United States of America

Laiqing Ping