A mixed-mode PWM controller

Ioannidis, GC; Charokopos, G; Marabeas, P; Manias, SN

dc.contributor.author	Ioannidis, GC	en
dc.contributor.author	Charokopos, G	en
dc.contributor.author	Marabeas, P	en
dc.contributor.author	Manias, SN	en
dc.date.accessioned	2014-03-01T01:32:28Z
dc.date.available	2014-03-01T01:32:28Z
dc.date.issued	2010	en
dc.identifier.issn	0020-7217	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20145
dc.subject	averaged models	en
dc.subject	control of dc-dc converters	en
dc.subject	current-mode	en
dc.subject	dc-dc converters	en
dc.subject	power electronics	en
dc.subject	PWM converters	en
dc.subject	sampling effect	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Averaged models	en
dc.subject.other	Buck converters	en
dc.subject.other	Constant output voltage	en
dc.subject.other	Control circuits	en
dc.subject.other	Control schemes	en
dc.subject.other	Control signal	en
dc.subject.other	Current mode	en
dc.subject.other	DC-DC power converter	en
dc.subject.other	Mixed mode	en
dc.subject.other	Output voltages	en
dc.subject.other	Output-tracking	en
dc.subject.other	Peak currents	en
dc.subject.other	PWM controllers	en
dc.subject.other	PWM converter	en
dc.subject.other	Ramp voltage	en
dc.subject.other	Reference voltages	en
dc.subject.other	sampling effect	en
dc.subject.other	DC power transmission	en
dc.subject.other	DC-DC converters	en
dc.subject.other	Dynamic response	en
dc.subject.other	Electronic circuit tracking	en
dc.subject.other	Power electronics	en
dc.subject.other	Pulse width modulation	en
dc.subject.other	Controllers	en
dc.title	A mixed-mode PWM controller	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/00207217.2010.506841	en
heal.identifier.secondary	http://dx.doi.org/10.1080/00207217.2010.506841	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	In this article, a mixed-mode (MM) PWM controller for dc-dc power converter topologies is presented and analysed. Compared to the conventional peak current-mode (PCM) controller, the proposed controller exhibits better results in terms of robustness towards load and reference voltage variations while maintaining better dynamic response. In the PCM controller, the control signal is a combination of inductor or, most often, switch current and a suitable compensation ramp which in the most common applications is constant. In the proposed controller, the constant compensation ramp has been replaced by a ramp voltage which is proportional to the output voltage taking into consideration the output voltage variations during load and reference transients. Consequently, the proposed controller, which exhibits the same advantages as with the PCM controller, additionally exhibits better load and reference performance for constant output voltage and output tracking applications without increasing the cost and the complexity of the control circuit. Finally, in order to verify the theoretical analysis and conclusions, both control schemes (i.e. PCM and MM) have been simulated and experimentally tested using a 75W buck converter unit. © 2010 Taylor & Francis.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	International Journal of Electronics	en
dc.identifier.doi	10.1080/00207217.2010.506841	en
dc.identifier.isi	ISI:000284627500005	en
dc.identifier.volume	97	en
dc.identifier.issue	12	en
dc.identifier.spage	1423	en
dc.identifier.epage	1438	en