Margins of stability of inner-current loop of peak current-mode controlled PWM dc-dc converters

This paper presents expressions for the limiting value of the duty cycle and the minimum value of the slope compensation for marginally stable operation as well as for the normalized crossover frequency, the maximum duty cycle, and the value of the slope compensation at a required phase margin. Thes...

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Bibliographic Details
Published in2009 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 1985 - 1988
Main Authors Kondrath, N., Kazimierczuk, M.K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2009
Subjects
DC-DC power converters
Frequency conversion
Inductors
Phase modulation
Pulse width modulation
Pulse width modulation converters
Resistors
Stability analysis
Virtual colonoscopy
Voltage control
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ISBN1424438276
9781424438273
ISSN0271-4302
DOI10.1109/ISCAS.2009.5118180

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Summary:This paper presents expressions for the limiting value of the duty cycle and the minimum value of the slope compensation for marginally stable operation as well as for the normalized crossover frequency, the maximum duty cycle, and the value of the slope compensation at a required phase margin. These quantities describe the performance of the inner-current loop in peak current-mode controlled PWM dc-dc converters. The derivations are based on the Pade approximation of z = exp(sT s ). The results of this paper can be used for the design of the inner-current loop with a specified phase margin.
ISBN:1424438276
9781424438273
ISSN:0271-4302
DOI:10.1109/ISCAS.2009.5118180