Control IC enables high-power LED lighting

International Rectifier introduces the IRS2548D Switched Mode Power Supply (SMPS) control IC for high-power LED illumination, including LED street lighting as well as stadium and theatrical lighting.

The IRS2548D, which combines Power Factor Correction (PFC) and a half-bridge driver in a single IC, offers greater than 88% efficiency for a 40 V/1.3 A HBLED load. This translates to a higher efficiency solution compared to alternative flyback converters at power levels above 60 W.
 
The new device achieves PWM dimming down to less than 2% light output and offers protection features that include programmable PFC and half-bridge over-current protection, latch immunity, and ESD protection. The IRS2548D also includes a variable frequency oscillator, fixed internal 1.6us deadtime, internal bootstrap MOSFET, internal 15.6 V zener clamp diode on Vcc, and micropower startup (250μA).

For more information, contact International Rectifier, 233 Kansas St., El Segundo, CA 90245. Phone: (310) 252-7105.