发明名称 |
CONTROL CIRCUITS AND METHODS FOR REGULATING OUTPUT VOLTAGES BASED ON ADJUSTABLE REFERENCES VOLTAGES |
摘要 |
Control circuits are provided for regulating an output voltage of a switched mode power supply having a variable input voltage and at least one power switch. The control circuits are operable to generate a comparison voltage based on the output voltage of the switched mode power supply and a duty cycle of a control signal provided to the at least one power switch, determine a reference voltage based on whether the generated comparison voltage falls within one of a plurality of voltage ranges, and adjust the duty cycle of the control signal provided to the at least one power switch of the switched mode power supply as a function of the determined reference voltage and the output voltage. Each voltage range is associated with a different reference voltage. Switched mode power supplies including the control circuits and methods implemented by the control circuits are also disclosed. |
申请公布号 |
US2015200595(A1) |
申请公布日期 |
2015.07.16 |
申请号 |
US201414372939 |
申请日期 |
2014.01.10 |
申请人 |
Astec International Limited |
发明人 |
Xiang Mao Xi;Ma Jian Zhen;He YuanDong;Fang HongLian |
分类号 |
H02M3/22 |
主分类号 |
H02M3/22 |
代理机构 |
|
代理人 |
|
主权项 |
1. A control circuit for regulating an output voltage of a switched mode power supply having a variable input voltage and at least one power switch, the control circuit operable to generate a comparison voltage based on the output voltage of the switched mode power supply and a duty cycle of a control signal provided to the at least one power switch; determine a reference voltage based on whether the generated comparison voltage falls within one of a plurality of voltage ranges, each voltage range associated with a different reference voltage; and adjust the duty cycle of the control signal provided to the at least one power switch of the switched mode power supply as a function of the determined reference voltage and the output voltage. |
地址 |
Kowloon HK |