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1. (WO2018126171) DETECTING RESONANCE FREQUENCY IN LLC SWITCHING CONVERTERS FROM PRIMARY SIDE

Pub. No.:    WO/2018/126171    International Application No.:    PCT/US2017/069011
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sat Dec 30 00:59:59 CET 2017
IPC: H02M 3/335
Applicants: TEXAS INSTRUMENTS INCORPORATED
TEXAS INSTRUMENTS JAPAN LIMITED
Inventors: GIOMBANCO, Salvatore
BANDYOPADHYAY, Saurav
CAPICI, Salvatore, Vincenzo
Title: DETECTING RESONANCE FREQUENCY IN LLC SWITCHING CONVERTERS FROM PRIMARY SIDE
Abstract:
Described examples include systems, methods and apparatus for determining a resonant frequency of an LLC converter (100) via a primary side (102) of the LLC converter (100). In one example, a circuit includes the LLC converter (100) and a resonant frequency determination unit (110). The resonant frequency determination unit (110) is configured to: monitor electrical current on the primary side (102); isolate a portion of the electrical current; based on the isolated portion of the electrical current, determine a crossing point; and based on the crossing point, determine a resonant frequency of the LLC converter (100).