公开(公告)号：US09130454B2

公开(公告)日：2015-09-08

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: H02M3/158 ,  H02M3/156 ,  H02M1/00

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。