Buck Converter Ripple: Sizing the Inductor and Capacitor With Confidence
The article discusses the importance of sizing inductors and capacitors in buck converters to manage ripple effectively. Ripple is an inherent characteristic of buck converters that can affect the performance of sensitive electronic circuits. Proper calculations and considerations of both capacitance and equivalent series resistance (ESR) are crucial for achieving desired ripple specifications without unnecessary costs.
- ▪A buck converter efficiently steps down higher DC voltages by rapidly switching a transistor.
- ▪Ripple is an unavoidable consequence of switching and must be managed rather than eliminated.
- ▪The output ripple is influenced significantly by the capacitor's ESR, often more than its capacitance.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3944450) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } NovaSolver Posted on May 25 • Originally published at novasolver.jp Buck Converter Ripple: Sizing the Inductor and Capacitor With Confidence #engineering #science #buck #em A buck converter takes a higher DC voltage and steps it down efficiently by switching a transistor on and off very fast. On a datasheet it looks clean: 12 V in, 5 V out. On an oscilloscope the output is never a flat line — it carries a small, periodic wobble called ripple.
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