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Dynamic Characteristics of Hysteretic PWM Control Operated in Double Switching Frequency of Clock Signal
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| Author(s) |
Takaharu MOROTOMI, Terukazu SATO, Kimihiro NISHIJIMA, Takashi NABESHIMA |
| Abstract |
This paper proposes a novel hysteretic PWM controller that consists of two comparators with hysteretic characteristics and OR gates. The proposed method operates in double switching frequency of the clock signal for synchronization with keeping the advantage of the excellent transient performance. In addition, this paper presents quantitative analysis for proper design of the control circuit. The presented analysis introduces a step change on the reference voltage at the input of hysteretic comparator and transfer functions of the hysteretic PWM controller with or without synchronization were revealed. Applying the proposed controller to the buck converter, it is confirmed that both theoretical results and measurements of the frequency responses agree well and the proposed method provides excellent transient performance with reduced ripple voltage at the higher switching frequency with synchronization. |
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| Filename: | 0513-epe2013-full-06241850.pdf |
| Filesize: | 593.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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