High efficiency switching charger with reduced input voltage ripple

US10003261B2 · kind B2 · utility

Assignee

• Dialog Semiconductor (UK) Limited · GB

Inventors

• Holger Petersen · Pastetten, DE
• Nicola Macri · Straubing, DE

Key dates

• Filing date: Dec 11, 2015
• Grant date: Jun 19, 2018
• Expiry date: Aug 26, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02M1/0095
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A voltage or current regulated power converter for charging batteries, is described. The power converter comprises an inductor (L), a capacitor cell (C1, C2), switches (S1, S2, S3, S4, S5, S6, S7, S8) and a controller. The controller controls the switches such that a commutation cycle of the power converter comprises a first phase, during which the capacitor cell and the inductor are arranged in series and during which a voltage across the serial arrangement of the capacitor cell and the inductor corresponds to Vin−Vout; a second phase, during which the capacitor cell and the inductor are arranged in series and during which the voltage across the serial arrangement of the capacitor cell and the inductor corresponds to −Vout; and a third phase, during which the capacitor cell is floating and during which the voltage across the inductor corresponds to Vin−Vout or to −Vout.