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IRS2548D LED Control IC Increases Efficiency, Simplifies Design and Reduces Overall System Cost. PRESS RELEASE. DATA SHEET.
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IRS2548D LED Control IC Increases Efficiency, Simplifies Design and Reduces Overall System Cost PRESS RELEASE DATA SHEET The IRS2548D, which combines Power Factor Correction (PFC) and half-bridge driver in a single IC offers greater than 88 percent efficiency for a 40V/1.3A HBLED load to deliver a higher efficiency solution compared to alternative Flyback converter solutions at power levels above 60W. HI-RES GRAPHIC Lighting HOME PAGE • Features • PFC, system control and half-bridge driver in one IC • Critical-conduction mode boost-type PFC • Programmable PFC over-current protection • Half bridge driver • Half bridge over current protection • Variable frequency oscillator • Fixed internal 1.6us HO and LO dead time • Internal bootstrap MOSFET • Micropower startup (250A) • Latch immunity and ESD protection • Advantages • 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 (250A). • Efficiencies can exceed 90 percent at higher power levels, for example in a 120W LED street lamp. April 2011