AN1971 Datasheet, PDF (1/16 Pages) STMicroelectronics – ST7LITE0xxx MICROCONTROLLED BALLAST

AN1971
APPLICATION NOTE
ST7LITE0xxx MICROCONTROLLED BALLAST
Demand for flexibility is increasing in new ballast applications. If a designer can use the same
ballast with different tube lamp wattages and types, savings can be made reducing logistic
costs. The aim of this application note is to show designers how the ST7 microcontroller helps
in the design of such a ballast. In addition, it shows how the use of the ST7LITE0xxx micro-
controller adds some attributes facilitating design-work and improving the ballast functionality.
1 INTRODUCTION
Figure 1 shows a diagram of the whole application.
Figure 1. Block Diagram
=400V
Half bridge Driver
L6384
Power
Section
Lamp
ST7LITE0xxx
Microcontroller
Voltage
Measurement
Current
Measurement
December 2012
Rev. 3
1/16
1