Hon Hai Precision Industry Co., Ltd.

Ampower Technology Co., Ltd.

Chi-Hsiung Lee

Yu-Hsiao Chao

Tsung-Liang Hung

Wei-Chi Huang

Hung-Yi Chen

Tien-Hsiang Meng

Che-Chen Fan Chiang

Nai-Chun Chang

Chau-Tung Fan-Chiang

Chih-Chang Chang

Cheng-Chueh Tsai

Shian-Nan Lin

Kuo-Chi Liu

Ta-Chang Wei

Jung-Kuei Chung

Chien-Chieh Tai

Tsang-Chuan Lin

A power supply system drives a plurality of loads, and includes a power stage circuit, a pulse width modulation controller, a first isolation transformer, at least two second transformers, and at least two rectifier circuits. The power supply system converts external power signals into first alternating current (AC) power signals, and converts the first AC power signals into second AC power signals. The second transformers either boost or buck the second AC power signals, and each has a primary winding connected to a secondary winding of the first isolation transformer in parallel and a center tap grounded. Each of the rectifier circuits is connected to two ends of a secondary winding of a corresponding one of the second transformers, and rectifies the boosted or bucked second AC power signals to output direct current (DC) power signals to a corresponding one of the plurality of loads.

Power supply system

A flyback power system includes a rectifier and filter circuit, a pulse width modulation (PWM) controller, a feedback circuit, a master converter circuit, a slave converter circuit, and a slave converter control circuit. The master converter circuit continuously converts power signals from the rectifier and filter circuit into first direct current (DC) power signals to drive load according to PWM signals of the PWM controller when the flyback power system powered on. The slave converter circuit converts the power signals from the rectifier and filter circuit into second DC power signals according to the PWM signals, and superposes the second DC power signals to the first DC power signals to drive the load when the load is heavy. The slave converter control circuit detects whether the load is heavy, and controls the PWM signals whether to input into the slave converter circuit according to a state of the load.

Flyback power supply system

An ion airflow generating device includes a number of generator stages, each of which includes a number of generators. Each generator includes a needle-shaped emitter and a ring-shaped receiver. The receivers in the same stage are arranged in an array. Each receiver defines a groove in an outer circumferential surface thereof along a direction parallel to the central axis thereof. Each two adjacent receivers in a former generator stage connect with each other, and the grooves thereof cooperatively define a hole for holding an emitter in a next generator stage. The receivers in the next generator stage symmetrically offset from the receivers in the former generator stage such that each emitter aligns to the center of a corresponding receiver.

Multi-stage ion airflow generating device

A light emitting diode (LED) driving system comprises a plurality of current limitation circuits and a plurality of over-voltage protection circuits to driving a plurality of LED strings. Each of the current limitation circuits comprises a first switch comprising a control pole receiving a reference voltage, a first pole correspondingly connected to a LED string, and a second pole connected to the ground via a first resistor and a second switch comprising a control pole connected to the second pole of the first switch via a second resistor, a first pole receiving the reference voltage, and a second pole grounded. Each of the over-voltage protection circuits comprises a zener diode, a third switch and a first capacitor.

Light emitting diode driving system

An ion generator to generate ion flow to ventilate heat comprises an emitter, a receiver and a power supply. The emitter comprises a needle electrode having one needle shaped tip configured as a discharging portion. The receiver comprises a plurality of flow channels for airflow and at least one receiving portion. The at least one receiving portion comprises a line edge arranged around a concave spherical surface, and the discharging portion is at a substantial center of the concave spherical surface. The power supply provides a voltage potential difference between the discharging portion of the emitter and the receiving portions of the receiver.

Ion generator and heat dissipation device using the same

A solar power supply system includes at least one solar power conversion circuit and an inverter circuit. Each solar power conversion circuit comprises a solar module and a direct current (DC) module. The solar module converts the solar power into the DC signals. The DC module with two-stage conversion comprises a DC transformer circuit and a maximum power point tracking circuit, to boost the DC signals and adjust output power of the solar module to a maximum value. The inverter circuit converts the boosted DC signals output from the solar power conversion circuits into AC signals and combines the AC signals into the AC utility network.

Low cost high efficiency high power solar power conversion system circuit and solar power supply system

An ionic thermal dissipation device includes an ionic wind generation system and a power system. The power system first converts external direct current (DC) power signals into first alternating current (AC) power signals, and boosts, increases voltage, and rectifies the first AC power signals to generate high voltage DC power signals to drive the ionic wind generation system. The power system also detects current signals generated by ion excitation of the ionic wind generation system and voltage signals of the high voltage DC power signals, and regulates the high voltage DC power signals and time of driving the ionic wind generation system according to a first PWM signal and a first analog signal from an electronic device and the detected current signals and voltage signals.

Ionic thermal dissipation device

A multi-lamp driving circuit for driving a plurality of lamp groups includes an inversion circuit configured to drive the plurality of lamp groups and a current balance circuit electrically connected between the inversion circuit and the plurality of lamp groups. The current balance circuit includes a plurality of transformers, each including a first magnetic loop composed of a first primary winding and a first secondary winding and a second magnetic loop composed of a second primary winding and a second secondary winding. Numbers of turns of the second primary winding and the second secondary winding of each of the plurality of transformers are equivalent, and numbers of turns of the first primary winding and the first secondary winding of each of the plurality of transformers are equivalent.

Multi-lamp driving circuit

A printed circuit board (PCB) adapted for mounting different kinds of light sensing modules thereon includes a lighting sensing area and a plurality of pads. The pads are disposed around the lighting sensing area, for configuring one light sensing module thereon. In the present invention, the PCB is suitable for different kinds of light sensing modules without redesign, which lowers the manufacturing cost of the PCB.

Printed circuit board and light sensing device using the same

A discharge lamp driving device includes a power stage circuit, a transformer circuit, a control circuit, a feedback circuit and a lamp protection circuit. The lamp protection circuit includes a current sensing circuit, a reference voltage selecting circuit, a comparing circuit and a protection signal generating circuit. The current sensing circuit senses current signals flowing through the lamps, and transforms the current signals to voltage signals. The reference voltage selecting circuit is connected to the current sensing circuit. The comparing circuit is connected to the current sensing circuit and the comparing circuit. The protection signal generating circuit is connected between the comparing circuit and the control circuit. The control circuit is connected to the comparing circuit.

Protection circuit and discharge lamp driving device employing the same

A lamp control system driving at least two discharge lamps according to at least two control instructions includes a control circuit, a switch circuit, a transformer resonance circuit, and a source transformer circuit. The control circuit generates a control signal to which the source transformer circuit is electrically connected, transforming the control signal to at least one alternating current (AC) signal, and the transformer resonance circuit is electrically connected to the source transformer circuit and the discharge lamps, transforming the at least one AC signal to one or more electrical signals to respectively drive one or more discharge lamps, the switch circuit, electrically connected to the source transformer circuit and the transformer resonance circuit, drives source transformer circuit output of the at least one AC signals to the transformer resonance circuit.

Lamp control system

A light source driving device for driving a light source module (), includes a power stage circuit (), a transformer and resonance circuit (), a current balancing circuit (), a feedback control circuit () and an fault detecting circuit (). The power stage circuit converts received signals to alternating current (AC) signals. The transformer and resonance circuit converts the AC signals to electrical signals. The current balancing circuit balances current flowing through the light source module. The fault detecting circuit comprises a plurality of inputs (a), (a(n=1, 2, 3, . . . , n)) and an output (b). One of inputs is connected to one input of the current balancing circuit, other inputs are connected to outputs of the current balancing circuit, and the output outputs a fault signal. The feedback control circuit is used for controlling output of the power stage circuit.

Light source driving device

A driving device for driving a light source module (), includes an inverter circuit () for converting a received signal to a signal driving the light source module, a feedback and filter circuit () for feeding back currents flowing through the light sources and filtering radio frequency interference (RFI) signals of feedback currents, and a controller () electrically connected between the feedback and filter circuit and the inverter circuit. The feedback and filter circuit includes at least one filter for filtering the RFI signals of the feedback currents, and a resistor (R) for feeding back the current flowing through the light source module. The filter includes an impedance (Z) including a first terminal designated as an input of the filter and a second terminal, and a capacitor (C). The capacitor includes a third terminal designated as an output of the filter and a fourth terminal electrically connected to ground.

A DC/DC converter includes an input filter, a half-bridge converter without PWM (Pulse Width Modulation) control function, a synchronous rectifier, an output capacitor, and a DC transformer. The DC transformer includes a magnetic core, a primary winding, a first secondary winding, and a second secondary winding. The magnetic core of the DC transformer includes a first leg, a second leg having a first air gap, and a third leg having a second air gap. The first secondary winding is wound on the first leg and the second leg, and induces a first inductance by the first air gap. The second secondary winding is wound on the first leg and the third leg, and induces a second inductance by the second air gap.

DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same

A power system for driving a plurality of lamps includes a transformer circuit, a current balancing circuit, and a light source. The transformer circuit includes a plurality of transformers in a quantity denoted by N, and each of the transformers has a first, a second, a third, and a fourth output ends. The current balancing circuit includes a plurality of current balancing units each having two output ends. The 2Nth current balancing unit is connected to a fourth output end of the Nth transformer, and the (2N&#x2212;1)th current balancing unit is connected to a first output end of the Nth transformer. The light source has a plurality of lamps each having one end connected to a respective output end of the current balancing units and another end grounded. The numbers of the current balancing units and the lamps are respectively twice and four times the quantity N of the transformers.

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Jhongli, Taiwan

Chi-Hsiung Lee