Green Solution Technology Co., Ltd.

Ying-Ying Yang

Li-Min Lee

Shian-Sung Shiu

Zhong-Wei Liu

Chao Shao

Huan-Huan Zhang

A power supply device is provided. The power supply device includes a power transistor, a detection circuit and a driving circuit. The power transistor is controlled by the driving circuit to generate an output current. A first end of the power transistor is coupled to a power voltage pin through a first bonding wire. A second end of the power transistor is configured to output the output current. The detection circuit is coupled between two ends of the first bonding wire to detect the output current and generate a control signal. The driving circuit generates a driving signal according to the control signal. When the output current value is larger than or equal to an over-current-protection current value, the driving circuit starts to adjust a voltage value of the driving signal, such that the output current value is kept at the over-current-protection current value.

Power supply device

The invention is directed to a low-dropout voltage regulator (LDO), including a power transistor, a driving stage circuit, a feedback circuit, a bias power source and an auxiliary reference current generation circuit. The power transistor is controlled by a driving signal to convert an input voltage into an output voltage. The feedback circuit generates a feedback voltage according to the output voltage. The driving stage circuit generates the driving signal according to the feedback voltage and the reference voltage. The bias power source provides a bias current. The auxiliary reference current generation circuit is configured to sample an output current, adjust the sampled output current to generate an adjustment current by means of mapping and superpose the adjustment current onto the bias current to generate a reference current to control drive capability of the driving stage circuit.

Low-dropout voltage regulator

A delay circuit includes a current circuit, a first current mirror circuit, a second current mirror circuit, a self-compensation circuit, and a delay capacitor. A fixed ratio is between the first current and the second current provided by the current circuit. The first current mirror circuit generates a first mirror current in response to the first current. A partial current of the second current flowing through the second current mirror circuit is a base current, and the second current mirror circuit generates a second mirror current in response to the base current. The self-compensation circuit generates a feedback current in response to the second mirror current. The delay capacitor generates a delay signal. The charging current is equal to the second current subtracting the base current. The first mirror current is the sum of the base current, the second mirror current, and the feedback current.

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Wuxi, China

Ying-Ying Yang