Ampower Technology Co., Ltd.

Hon Hai Precision Industry Co., Ltd.

Chih-Chang Chang

Chih-Chan Ger

Chi-Hsiung Lee

Chia-Kun Chen

Chi-Wen Kan

Ta-Chang Wei

Chao-Tung Fan-Chiang

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 power device transforms input power into power for output, and includes an input unit, a power factor unit, a first electronic switch, an output unit, and a control signal port. The power factor unit includes a power factor correction circuit and a first detection circuit connected to an output end of the power factor unit and the power factor correction circuit. The first electronic switch is connected to the first detection circuit, and is under control of the control signal port.

Power supply device with low standby power consumption

An inverter circuit () includes a transformer (T) including a primary winding and a secondary winding including a high voltage terminal, a first copper foil (P), a power stage circuit () electrically connected to the primary winding, a detection circuit () including a second copper foil (P) and an impedance (Z), a protection circuit () outputting a protection signal, and a pulse width modulation controller () controlling output of the power stage circuit according to the protection signal. The second copper foil and the first copper foil are separated. An equivalent capacitor is formed between the second copper foil and the first copper foil, detecting voltage output from the high voltage terminal. The impedance is electrically connected between the second copper foil and ground, dividing a voltage detected by the equivalent capacitor.

Inverter circuit

A voltage sensing circuit () for sensing voltage signals of input alternating current (AC) signals includes a plurality of voltage dividing circuits ((n=1, 2, 3, . . . , n)) and a charging circuit (). The voltage dividing circuits are used for dividing voltage signals of the input AC signals. The voltage dividing circuits are connected to the charging circuit, and then the divided voltage signals can be transmitted between the voltage dividing circuits, thereby pulling high corresponding DC levels of the divided voltage signals.

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Taoyuan County, Taiwan

Chih-Chang Chang