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 60 W.
“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,” said, Peter Green, LED Group Manager, IR’s Energy Saving Products Business Unit.
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).