US 12,224,670 B2
Frequency regulating circuit, frequency regulating method and switching circuit
Yang Yang, Hangzhou (CN); Mengyi Huang, Hangzhou (CN); and Xiangyong Xu, Hangzhou (CN)
Assigned to Joulwatt Technology Co., Ltd., Hangzhou (CN)
Filed by Joulwatt Technology Co., Ltd., Hangzhou (CN)
Filed on Sep. 23, 2022, as Appl. No. 17/951,930.
Claims priority of application No. 202111112680.2 (CN), filed on Sep. 23, 2021.
Prior Publication US 2023/0094128 A1, Mar. 30, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/33569 (2013.01) [H02M 1/0054 (2021.05)] 16 Claims
OG exemplary drawing
 
1. A frequency regulating circuit for a switching circuit, wherein the switching circuit is configured to receive an input voltage and generate an output voltage, wherein the frequency regulating circuit receives a first signal characterizing an output power and a second signal characterizing an input voltage to generate a third signal;
wherein the third signal is used to adjust a maximum operating frequency of the switching circuit so that the maximum operating frequency decreases with an increase of the input voltage,
wherein the frequency regulating circuit comprises:
a charging current generating module, wherein the charging current generating module is configured to receive the first signal and the second signal to generate a charging current; and
a signal generating module, wherein the signal generating module is configured to output the third signal according to the charging current,
wherein the charging current generating module adjusts an amount of the charging current according to the second signal characterizing the input voltage, and the charging current decreases with the increase of the input voltage.