Fixed-cycle power-supply circuit with an at least temporarily active consumer-independent load

US6005302A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Lothar Borho · Kehl, DE
• Karl-Heinrich Preis · Bühlertal, DE
• Klaus Eckert · Herbrechtingen, DE
• Robert Kern · Indianapolis, US
• Gerhard Decker · Achern, DE

Key dates

• Filing date: May 29, 1998
• Grant date: Dec 21, 1999
• Expiry date: May 29, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S315/07
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A clocked power supply circuit having an at least intermittently active load that is independent of a consumer, in particular for supplying power to gas-discharge lamps as consumers, contains a dc/dc converter comprising a transformer. Switching elements connect the converter to a dc voltage source in the timing of a control arrangement which makes available switching signals for the switching elements as a function of the prevailing output-side load state. The transformer of the dc/dc converter is designed so that two voltages (U+, U-) of differing polarity and magnitude, are able to be tapped off from the output side. At least one of these voltages is regulated and provided for supplying power during operation of the consumer. The at least intermittently active load can be switched to the regulated voltage.