Low-loss circuit powers solar lantern

Design characteristics for a solar-lantern circuit, which is a low-loss configuration that uses a 7W, four-pin compact fluorescent lamp and a 12V, 7-Ahr, sealed, maintenance-free battery. The inverter features greater-than-85% efficiency, less-than-2-mA quiescent current, and a shunt-charge controll...

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Bibliographic Details
Published in:EDN 2004-04, Vol.49 (7), p.94-96
Main Author: Kumar, Ramsesh
Format: Magazinearticle
Language:English
Subjects:
Analysis
Design engineering
Electric circuits
Electric inverters
Integrated circuits
Lighting systems
Photovoltaic cells
Product information
Transistors
Online Access:Get full text
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Summary:Design characteristics for a solar-lantern circuit, which is a low-loss configuration that uses a 7W, four-pin compact fluorescent lamp and a 12V, 7-Ahr, sealed, maintenance-free battery. The inverter features greater-than-85% efficiency, less-than-2-mA quiescent current, and a shunt-charge controller with deep-discharge and overcharge protection for the battery. The low quiescent current and the deep-discharge and overcharge protection ensure long life for the battery. The circuit finds application in rural areas as a reliable, compact, portable light source and in urban areas as an emergency-lighting system.
ISSN:0012-7515
2163-4084