Delta Electronics, Inc.

Kun-Jang Kuo

Chung-Chieh Cheng

Tien-He Chen

Shou-Chieh Lin

Kun-Chi Lin

Yung-Sheng Yan

Cheng-Ting Chou

Sheh-Jung Wen

A method of controlling a resonant push-pull converter is disclosed. The resonant push-pull converter includes a transformer, a first switch, a second switch, a resonant tank, and a rectifying circuit. The method includes a step of a fixed on-time control. In the fixed on-time control, a first control signal with a fixed on-time is used to control the first switch, and a second control signal with the fixed on-time is used to control the second switch so that the first switch and the second switch are alternately switched.

Method of controlling resonant push-pull converter

A power delivery device and a control method are shown. The power delivery device includes a power factor correction circuit, and an output voltage control circuit. The power factor correction circuit is configured to increase a power factor of the power delivery device. The output voltage control circuit is configured to control an output voltage of the power delivery device, and detect an output current of the power delivery device. The power factor correction circuit is uncontrolled by the output voltage control circuit in response to a first load state of the power delivery device, and is controlled by the output voltage control circuit in response to a second load state of the power delivery device.

Power delivery device and control method thereof

An intelligent uninterruptible power charging apparatus includes an uninterruptible power module, a charging module, and an output port. The uninterruptible power module provides a first charging power source. The charging module converts the first charging power source into a second charging power source and outputs the second charging power source through the output port. When an electronic apparatus is connected to the output port, the charging module receives an identification signal outputted from the electronic apparatus and adjusts a voltage level of the second charging power source according to the identification signal.

Intelligent uninterruptible power charging apparatus and method of operating the same

A power delivery device and a control method are shown. The power delivery device includes a power conversion circuit, a power factor correction circuit, and an output voltage control circuit. The power conversion circuit includes a primary side and a secondary side, and is configured to receive an input voltage and convert the input voltage to an output voltage. The power factor correction circuit is electrically coupled to the primary side and configured to increase the power factor of the power delivery device. The output voltage control circuit is electrically coupled to the secondary side and configured to control the voltage level of the output voltage. When the voltage level of the output voltage is lower than a predetermined level, the power factor correction circuit is deactivated.

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Taoyuan, Taiwan

Kun-Jang Kuo