IRS21571D Datasheet, PDF (3/28 Pages) International Rectifier – FULLY INTEGRATED BALLAST CONTROL IC

IRS21571D
Description
The IRS21571D is a fully integrated, fully protected 600V ballast control IC designed to drive virtually all types of
rapid start fluorescent lamp ballasts. Externally programmable features such as preheat time and frequency,
ignition ramp characteristics, and running mode operating frequency provide a high degree of flexibility for the
ballast design engineer. Comprehensive thermal overload, or lamp failure during normal operation, as well as an
automatic restart function, have been included in the design. The heart of this control IC is a variable frequency,
50% duty cycle oscillator with externally programmable deadtime. An integrated bootstrap MOSFET is also
included to supply the high-side gate drive circuitry. The IRS21571D is available in 16 pin narrow body SOIC
package.
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