International Rectifier IRS2526DS Mini8 compact fluorescent lamp (CFL) ballast control IC

The IRS2526DS Mini8 compact fluorescent lamp (CFL) ballast control integrated circuit (IC) offers full programmability and a high degree of accuracy and control for all lamp types. It features a 600 V half-bridge control circuit working at 50% duty cycle and variable frequency for driving the resonant mode lamp output circuit. The high-accuracy oscillator is controlled by a single analog-to-frequency input pin used to set the different operating frequencies of the ballast.

Available in an 8-pin SO-8 package, the IC reduces component count, simplifies circuit design and increases efficiency in a compact footprint. Complete fault protection circuitry is also included for protection against such conditions as mains interrupt or brown-out, lamp non-strike, lamp filament failure and end-of-life.

The device also incorporates an internal frequency dither to reduce conducted EMI, ignition control to reduce inductor size, and end-of-life detection. It is targeted at applications that do not require PFC or utilise an external PFC controller.