Invention Grant
US09479063B2 Frequency jittering control circuit and method for a PFM power supply
有权
用于PFM电源的频率抖动控制电路和方法
- Patent Title: Frequency jittering control circuit and method for a PFM power supply
- Patent Title (中): 用于PFM电源的频率抖动控制电路和方法
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Application No.: US13567272Application Date: 2012-08-06
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Publication No.: US09479063B2Publication Date: 2016-10-25
- Inventor: Jiun-Hung Pan , Chien-Fu Tang , Isaac Y. Chen
- Applicant: Jiun-Hung Pan , Chien-Fu Tang , Isaac Y. Chen
- Applicant Address: TW Chupei, Hsinchu
- Assignee: RICHTEK TECHNOLOGY CORP.
- Current Assignee: RICHTEK TECHNOLOGY CORP.
- Current Assignee Address: TW Chupei, Hsinchu
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: TW100130691A 20110826
- Main IPC: H02M3/335
- IPC: H02M3/335 ; H02M1/44 ; H02M3/156
Abstract:
A frequency jittering control circuit for a PFM power supply includes a pulse frequency modulator to generate a frequency jittering control signal to switch a power switch to generate an output voltage. The frequency jittering control circuit jitters an input signal or an on-time or off-time of the pulse frequency modulator to jitter the switching frequency of the power switch to thereby improve EMI issue.
Public/Granted literature
- US20130051089A1 FREQUENCY JITTERING CONTROL CIRCUIT AND METHOD FOR A PFM POWER SUPPLY Public/Granted day:2013-02-28
Information query
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