Electronicdesign 6395 0912edenewsir
Electronicdesign 6395 0912edenewsir
Electronicdesign 6395 0912edenewsir
Electronicdesign 6395 0912edenewsir
Electronicdesign 6395 0912edenewsir

Efficient Ballast Control IC Ditches PFC Stage

Sept. 12, 2013
To replace magnetic ballast control systems in fluorescent lamps, International Rectifier has introduced a control IC that uses a novel control method to eliminate the need for a power factor correction (PFC) stage.

To replace magnetic ballast control systems in fluorescent lamps, International Rectifier has introduced a control IC that uses a novel control method to eliminate the need for a power factor correction (PFC) stage. The single-chip SO8 device achieves high power factor with ultra-low total harmonic distortion (THD). No electrolytic capacitor is needed at the input.

The IRS2538DS integrates a 600-V half-bridge control circuit, bootstrap MOSFET, and comprehensive set of protection features to further reduce component count and printed-circuit board (PCB) area, as well as to increase reliability. Features include preheat, ignition and running lamp modes, closed-loop lamp current control, fixed pre-heat time (2 s typical), adaptive deadtime (0.5 µs to 1.5 µs typical), lamp insert auto-restart, micropower startup (125 µA), and an internal 15.6-V Zener diode clamp on Vcc.

INTERNATIONAL RECTIFIER

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