Lite-on Technology Corporation

National Taiwan University

Other

Lite-on Electronics (guangzhou) Limited

Huang-jen Chiu

Huang-Jen Chiu

Jing-Yuan Lin

Yu-Kang Lo

Yu-Chen Liu

Po-Jung Tseng

Wei-Lieh Lai

Yao-Ching Hsieh

Chen Chen

Kai-De Chen

Chien-Yu Lin

Pin-Hsien Liu

Chin-Chuan Huang

Katherine Ann Kim

Sih-Yi Lee

De-Jia Lu

Yong-Long Syu

Sin-Li Lin

Chung-Yi Lin

Ming-Cheng Chen

Chao-Fu Wang

Zong-Sian Jiang

Ya-Jhe Liu

Chu-Yi Chou

Ching-Chia Chen

Anh Dung Nguyen

Chien Yu Lin

Jun-Ru Wang

Anh-Dung Nguyen

Jin Chyuan Huang

Yi-Fu Chen

John L Chen

Cheng-Yen Chou

Cheng-Ting Lin

Trong-Nha Quang

Ruei-Sheng Tsai

Tse-Wei Chao

Chien-Chun Huang

Zhong-Heng Li

Kuan-Fu Chou

Guan-Wei Lin

An adjustable leakage inductance transformer includes a magnetic core, a primary side coil and a secondary side coil. The magnetic core includes a magnetic core column structure, which has a central column, a first outer column and a second outer column. The primary side coil is wound on the first outer column and the second outer column by a first primary side coil loop number and a second primary side coil loop number, respectively. The secondary side coil is wound on the first outer column and the second outer column by a first secondary side coil loop number and a second secondary side coil loop number, respectively, the first primary side coil loop number is not equal to the first secondary side coil loop number, and the second primary side coil loop number is not equal to the second secondary side coil loop number.

Adjustable leakage inductance transformer

A control circuit and a control method for a power converter are provided. The power converter includes a plurality of resonant tanks and a plurality of switches disposed between an input terminal and an output terminal. The switches correspond to a first mode and a second mode, respectively, and the control circuit includes a first switch control circuit, a first zero current detection circuit, a second zero current detection circuit, a first switch off detector, a modulation time calculation module, a second switch control circuit, a third zero current detection circuit, a fourth zero current detection circuit, and a second switch off detector. The control circuit uses a plurality of zero current detection circuits to perform time modulations on a plurality of rectifier switches in the switches.

Control circuit and control method for power converter

A transformer includes a magnetic core, a primary side winding and a plurality of secondary side windings. The magnetic core includes a first outer column, a second outer column, an upper cover and a lower cover. The first outer column and the second outer column are disposed between the upper cover and the lower cover. The primary side winding is disposed on the first outer column and the second outer column, and the plurality of secondary side windings are disposed on the first outer column and the second outer column. Each of the secondary windings has one end passing through a region between the first outer column and the second outer column.

Transformer and series resonant converter including the same

A multi-level buck converter includes an input power source, an input capacitor, first to fourth switches, a clamp capacitor, an output inductor, a clamp switch, a clamp diode, an output capacitor, an output load, a current detection circuit, a voltage detection circuit and a control circuit. The current detection circuit detects whether an inductor current of the output inductor exceeds a predetermined current value, and if so, the output clamp signal controls the clamp switch to be turned on. The voltage detection circuit generates a duty cycle control signal according to an error between an output voltage and a target output voltage. The control circuit controls the first to the fourth switches to sequentially enter a first mode, a second mode, a third mode, and a fourth mode in a first part of a duty cycle.

Multi-level buck converter capable of reducing component stress

A totem-pole bridgeless power factor corrector and a power factor correction method are provided. The totem-pole bridgeless power factor corrector obtains a duty cycle of next state by a predictive valley-peak current control method, and uses an OR gate element to combine PWM signals generated by an average current control method and the predictive valley-peak current control method, thereby enabling a digital signal processor to update the duty cycle.

Totem-pole bridgeless power factor corrector and power factor correction method

A series resonant converter includes a switching circuit, a resonant tank, a transformer and a rectifier circuit. The switch circuit has a power supply connected to the primary side upper bridge switch and the primary side lower bridge switch, which are configured to control the input voltage and the input current of the power supply. The resonant tank is coupled to the switch circuit and includes a resonant inductor, a resonant capacitor, and a magnetizing inductor connected in series. The transformer is coupled to the resonant tank and includes a core, a primary winding, and at least four groups of secondary windings. The core has a center column, the primary winding is wound on the center column, and at least four secondary windings are wound on the center column. The number of equivalent windings added by the at least four groups of secondary windings is 1.

Series resonant converter

An interleaved LLC half-bridge series resonant converter having an integrated transformer includes a power supply, a magnetic core, a first converter, a second converter and an output load circuit. The magnetic core has first and second outer columns and a center column. The first converter includes a first switch circuit, a first resonant tank, a first transformer, and a first rectifier circuit. The first transformer is coupled to the first resonant tank and includes a first primary winding wound on the first outer column and a first secondary winding wound on the second outer column. The second converter includes a second switch circuit, a second resonant tank, a second transformer and a second rectifier circuit. The second transformer is coupled to the second resonant tank and includes a second primary winding wound on the first outer column and a second secondary winding wound on the second outer column.

Interleaved LLC half-bridge series resonant converter having integrated transformer

A bidirectional converter with high voltage gain and low switch voltage stress is provided. The bidirectional converter has a first input-output terminal and a second input-output terminal, and includes first and second inductors, first and second high side switch modules, first and second low side switch modules, a first clamping capacitor, first and second capacitors, and a switching control circuit. The switching control circuit is configured to switch between three switching modes.

Bidirectional DC-DC converter

Disclosed is an integrated transformer used in a resonant converter. The integrated transformer includes a primary side circuit, a secondary side circuit and an integrated core. A first voltage received by the primary side circuit is converted to a second voltage due to the electromagnetic induction, and the second voltage is outputted by the secondary side circuit. The primary side circuit is configured on the integrated core. The integrated core includes many iron rings, and the iron rings have a common side. The common side of the iron rings is a center column of the integrated core, and the other sides of the iron rings are rim columns of the integrated core. The coils of the primary side circuit are configured respectively to the rim columns of the integrated core, and the coils of the primary side circuit are connected in serial.

Integrated transformer

An inverter device comprises a first stage circuit, a second stage circuit and a control module. The first stage circuit comprises a first switch module and a charge-discharge module. The second stage circuit comprises a second switch module and a filter module. The control module outputs a first control signal for controlling the first switch module to turn on/off and a second control signal for controlling the second switch module to turn on/off. The control module obtains an input current from the first stage circuit, and adjusts the input current according to a predetermined current value. In addition, the control module obtains an output power from the AC output terminal, and adjusts the duty cycle of the first control signal according to the output power and a predetermined output power.

Inverter device and controlling method thereof

A buck converter includes: a first input terminal; a second input terminal; a first output terminal; a second output terminal; an internal node; a first inductor, a second inductor and a main switch connected in series between the first input terminal and the internal node; a third inductor connected between the internal node and the first output terminal; a fourth inductor connected between the second input terminal and the second output terminal; a first auxiliary switch connected between the internal node and the second output terminal; and a second auxiliary switch connected between the second input terminal and the first output terminal.

Buck converter with changeable relationship between output voltage and duty cycle, and buck converting apparatus using the same

An interleaved buck converter performs buck conversion by controlling operation of each of two switches thereof between an ON state and an OFF state. The switches have the same switching period and the same ON time interval, and a time delay from switching of one of the switches into the ON state to switching of the other one of the switches into the ON state equals the ON time interval of the switches minus a predetermined time interval.

Interleaved buck converter

A single-stage AC-to-DC converter includes a bus capacitor, a power factor correcting module, a resonant converting module and a control module. The power factor correcting module generates, based on an AC (alternating current) input voltage, a first control signal and a second control signal, a DC (direct current) bus voltage across the bus capacitor and an intermediate voltage switching between the bus voltage and zero. The resonant converting module generates a DC output voltage based on the intermediate voltage. The control module generates, based on the bus voltage, the first and second control signals, each of which switches between an active state and an inactive state and has a duty cycle associated with the bus voltage.

Single-stage AC-to-DC converter with variable duty cycle

A resonant converter includes: a transformer including a first primary winding, a second primary winding and a secondary winding, each primary winding having a first end terminal and a second end terminal; a first switch coupled to the first end terminal of the first primary winding; a resonant inductor and a resonant capacitor connected in series between the second end terminal of the first primary winding and the first end terminal of the second primary winding; a second switch coupled between the first end terminals of the first and second primary windings; and a third switch coupled between the second end terminals of the first and second primary windings.

Resonant converter with three switches

A flyback active clamping power converter is disclosed. The flyback active clamping power converter comprises an input inductor, a down-bridge switch, an up-bridge switch, a first energy-storing capacitor, a clamping capacitor, a resonant inductor, a magnetizing inductor, a transformer, an output diode and an output capacitor. When a resonant frequency generated by the resonant inductor and the clamping capacitor in the flyback active clamping power converter is substantially equal to a switching frequency, the output diode is able to perform a zero current switching in the whole load range.

Flyback active clamping power converter

Growing community of inventors

Taipei, Taiwan

Huang-Jen Chiu