Pioneer in power control technology, International Rectifier has unveiled the Switched Mode Power Supply (SMPS) control IC called the IRS2548D to deliver energy-saving solutions for ultra power LED lighting such as LED theatrical lighting, stadium lighting and street lighting.
The IRS2548D features a combination of half-bridge driver and Power Factor Correction (PFC) in a single IC. At a load of 40 V / 1.3 A HBLED, the IC provides over 88% efficacy, a higher value of efficacy than traditional flyback converter systems at power levels more than 60 W.
The IRS2548D attains pulse width modulation dimming of less than 2% of light output. ESD protection, latch immunity, half-bridge over-current protection and programmable PFC are some of the safety features provided by the device. The SMPS IC also features micropower startup (250 ìA), internal 15.6 V zener clamp diode on Vcc, internal bootstrap MOSFET, fixed internal 1.6us deadtime and variable frequency oscillator.
According to Peter Green, who works as LED Group Manager of Energy Saving Products Business Unit at International Rectifier, by integrating both control points into a single IC, the IRS2548D facilitates ease-of-design, cuts down overall system price and offers considerable power savings for LED power supplies.