IR’s IRS2548D LED Control IC Increases Efficiency, Simplifies Design and Reduces Overall System Cost

28 APRIL 2011

International Rectifier has introduced the IRS2548D Switched Mode Power Supply (SMPS) control IC for energy efficient applications for high power Light Emitting Diode (LED) illumination including LED street lighting, stadium lighting and theatrical lighting.
The IRS2548D, which combines Power Factor Correction (PFC) and half-bridge driver in a single IC offers greater than 88 percent efficiency for a 40 V / 1.3 A HBLED load to deliver a higher efficiency solution compared to alternative flyback converter solutions at power levels above 60W.
By incorporating both control stages into a single IC, the new IRS2548D provides an integrated solution for LED power supplies that simplifies design and helps reduce overall system cost, while providing significant energy savings.
The new device achieves PWM dimming down to less than 2 percent 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 variable frequency oscillator, fixed internal 1.6us deadtime, internal bootstrap MOSFET, internal 15.6V zener clamp diode on Vcc, and micropower startup (250μA).

Design Tools
A datasheet and application note are available on the International Rectifier website at www.irf.com. The devices are lead-free and RoHS compliant. In addition, the IRPLLED5 reference design kit, featuring the IRS2548D is available.

International Rectifier
www.irf.com

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