Spur-reduction design of frequency-hopping DC-DC converters
Journal
IEEE Transactions on Power Electronics
Journal Volume
27
Journal Issue
11
Pages
4763-4771
Date Issued
2012
Author(s)
Abstract
This paper presents an inductor current average control (ICAC) method that minimizes the undesirable transient glitches in dc-dc converters using a frequency-hopping pulsewidth modulation control. The analysis in this paper shows that without careful control of the frequency-hopping instant for the dc-dc converters, the transient glitches can be rather large in magnitude and may interfere with the modulated signal to be transmitted from a mobile communication device. The ICAC technique selects the frequency-hopping instant such that the average inductor current is undisturbed when the switching frequency hops. The measurement result shows that the ICAC technique can suppress the transient spurs by 14.1 dB and the voltage of the transient glitches by 65.3%.
SDGs
Type
journal article