公开(公告)号：US20140292295A1

公开(公告)日：2014-10-02

申请号：US14206856

申请日：2014-03-12

Applicant: Richtek Technology Corporation

Inventor： Yen-Te LEE ,  Wen-Wei CHEN ,  Wei-Yuan TING

IPC: H02M3/156

CPC classification number: H02M3/156 ,  H02M3/1588 ,  H02M2001/0019 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A control circuit of a power converter includes: a periodical signal generating circuit for generating a first filtered signal, a second filtered signal, and a periodical signal according to a second feedback signal corresponding to an inductor voltage of the power converter; a comparison circuit for comparing the error signal and the periodical signal to generate a comparison signal; a control signal generating circuit for generating a control signal to control power switches of the power converter according to the comparison signal; and a signal adjusting circuit. During a load transient period at which the load of the power converter changes from a relatively light load to a relatively heavy load, when a lower switch of the power converter is turned on, the signal adjusting circuit reduces an output current of the periodical signal generating circuit to increase a loop response of the power converter.

Abstract translation: 功率转换器的控制电路包括：周期信号发生电路，用于根据对应于功率转换器的电感器电压的第二反馈信号产生第一滤波信号，第二滤波信号和周期信号; 比较电路，用于比较误差信号和周期信号以产生比较信号; 控制信号发生电路，用于根据比较信号产生控制功率转换器的功率开关的控制信号; 和信号调节电路。 在功率转换器的负载从相对较轻的负载变化到相对较重的负载的负载瞬态期间，当功率转换器的下部开关接通时，信号调节电路减少周期性信号产生的输出电流 电路来增加功率转换器的回路响应。

公开(公告)号：US20130314060A1

公开(公告)日：2013-11-28

申请号：US13900181

申请日：2013-05-22

Applicant: Richtek Technology Corporation

Inventor： Wen-Wei CHEN

IPC: G05F1/46

CPC classification number: G05F1/46 ,  H02M3/158 ,  H02M2001/0003

Abstract: A constant on time mode power supplier uses longer constant on time when the output voltage of the constant on time mode power supplier is drooped due to load variation, to increase energy provided to the output of the constant on time mode power supplier for preventing the output voltage from undershooting and shortening the time for the output voltage to recover stable.

Abstract translation: 恒定的时间模式电源供应商由于负载变化而使恒定导通时间模式电源的输出电压下降，使用更长的恒定导通时间，以增加提供给恒定时间模式电源的输出的能量，以防止输出 电压不足，缩短输出电压恢复稳定的时间。

公开(公告)号：US20130170261A1

公开(公告)日：2013-07-04

申请号：US13729936

申请日：2012-12-28

Applicant: RICHTEK TECHNOLOGY CORPORATION

Inventor： Yen-Te LEE ,  Kuo-Chi LIU ,  Wen-Wei CHEN ,  Yi-Fan CHEN ,  Kuang-Feng LI

IPC: H02H7/16 ,  H02M7/06

CPC classification number: H02H7/16 ,  H02M1/44 ,  H02M7/06 ,  H02M2001/322

Abstract: An independent bleeding integrated circuit device is provided to replace the bleeding resistor for an EMI filter capacitor, to establish a discharge path between the two terminals of the EMI filter capacitor when the EMI filter capacitor is disconnected from an AC power source, for discharging the EMI filter capacitor. When the EMI filter capacitor is connected with an AC power source, the discharge path is cut off to avoid power loss.

Abstract translation: 提供独立的出血集成电路器件来替代EMI滤波电容器的出血电阻器，当EMI滤波电容器与AC电源断开时，建立EMI滤波电容器的两个端子之间的放电路径，用于放电EMI 滤波电容器。 当EMI滤波电容器与交流电源连接时，放电路径被切断以避免功率损耗。