公开(公告)号：US20140098452A1

公开(公告)日：2014-04-10

申请号：US14049208

申请日：2013-10-08

Applicant: FSP TECHNOLOGY INC.

Inventor： Lung-Chi Wei ,  Ching-Chia Chu

IPC: H02H9/02

CPC classification number: H02H9/02 ,  H02H9/001

Abstract: A power supply apparatus is provided, and which includes a power conversion circuit, a control chip with soft-start function and a short protection circuit. The power conversion circuit is configured to provide a DC output voltage to a load in response to an output pulse-width-modulation (PWM) signal. The control chip is operated under a DC input voltage, and configured to generate the output PWM signal to control the operation of the power conversion circuit. The short protection circuit is configured to pull-down the level of a soft-start pin of the control chip, so as to substantially/significantly reduce the frequency and duty cycle of the output PWM signal, and then substantially/significantly reduce the current flowing through the shorted load.

Abstract translation: 提供一种电源装置，其包括功率转换电路，具有软启动功能的控制芯片和短路保护电路。 功率转换电路被配置为响应于输出脉宽调制（PWM）信号向负载提供DC输出电压。 控制芯片在DC输入电压下工作，并且被配置为产生输出PWM信号以控制功率转换电路的操作。 短路保护电路被配置为下拉控制芯片的软启动引脚的电平，以便基本上/显着地降低输出PWM信号的频率和占空比，然后基本上/显着地减小电流流动 通过短路负载。

公开(公告)号：US09419433B2

公开(公告)日：2016-08-16

申请号：US14049208

申请日：2013-10-08

Applicant: FSP TECHNOLOGY INC.

Inventor： Lung-Chi Wei ,  Ching-Chia Chu

IPC: H02H7/00 ,  H02H9/02 ,  H02H9/00

CPC classification number: H02H9/02 ,  H02H9/001

Abstract: A power supply apparatus is provided, and which includes a power conversion circuit, a control chip with soft-start function and a short protection circuit. The power conversion circuit is configured to provide a DC output voltage to a load in response to an output pulse-width-modulation (PWM) signal. The control chip is operated under a DC input voltage, and configured to generate the output PWM signal to control the operation of the power conversion circuit. The short protection circuit is configured to pull-down the level of a soft-start pin of the control chip, so as to substantially/significantly reduce the frequency and duty cycle of the output PWM signal, and then substantially/significantly reduce the current flowing through the shorted load.

Abstract translation: 提供一种电源装置，其包括功率转换电路，具有软启动功能的控制芯片和短路保护电路。 功率转换电路被配置为响应于输出脉宽调制（PWM）信号向负载提供DC输出电压。 控制芯片在DC输入电压下工作，并且被配置为产生输出PWM信号以控制功率转换电路的操作。 短路保护电路被配置为下拉控制芯片的软启动引脚的电平，以便基本上/显着地降低输出PWM信号的频率和占空比，然后基本上/显着地减小电流流动 通过短路负载。

公开(公告)号：US12040717B2

公开(公告)日：2024-07-16

申请号：US17704293

申请日：2022-03-25

Applicant: FSP TECHNOLOGY INC.

Inventor： Lung-Chi Wei ,  Ching-Hung Kuo ,  Cheng-Han Tsai

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/32

CPC classification number: H02M3/33507 ,  H02M1/0009 ,  H02M1/32

Abstract: An electrical power conversion device, a function triggering circuit for the electrical power conversion device, and a function triggering method for the electrical power conversion device are provided. The function triggering circuit is coupled between the secondary side of the transformer and the control module and includes a current detection circuit, a delay circuit and a switching circuit. The current detection circuit senses the secondary side of the transformer to generate a detection signal of delay. Before steady-state duty of the transformer, the delay circuit causes an initial level to be higher than an internal level. After steady-state duty of the transformer, the switching circuit selectively generates a function triggering signal according to the detection signal. The function triggering signal is for triggering the control module to carry out an overcurrent protection operation. Therefore, the electrical power conversion device effectuates electrical power conversion precisely and steadily, provides precise overcurrent protection, and achieves low stand-by power consumption.