Affiliation:
1. Institute of Electronic CAD, Xidian University, No. 2, South Tai Bai Road, Xi'an 710071, P. R. China
Abstract
A novel ballast control IC is presented, which fully satisfies specific needs of hot cathode fluorescent lamp and significantly simplifies the external circuit design with the great reliability, generality and practicability. Integrated with a simple multi-frequency oscillator, the IC obtains adjustable preheat-time by controlling frequency changing rate with an external capacitor, and adjusts the minimum frequency by controlling minimum charging current with an external resistor. And a steady dead-time can also be achieved. Based on 0.5 μm BCD process, the HSPICE simulation was done with 14 V voltage supply. While a 1 μF capacitor and a 100 kΩ resistor are utilized in the external circuit, this IC gives out a preheating frequency up to 175 kHz and the minimum working frequency is 75 kHz. A high frequency preheating time of 1 s and a steady dead-time of 2 μS can also be achieved.
Publisher
World Scientific Pub Co Pte Lt
Subject
Electrical and Electronic Engineering,Hardware and Architecture,Electrical and Electronic Engineering,Hardware and Architecture