International Rectifier has introduced a new switched mode power supply (SMPS) control IC for energy-efficient applications for high-power LED illumination including 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% efficiency for a 40 V/1,3 A HBLED load. By incorporating both control stages into a single IC, the device provides an integrated solution for LED power supplies that simplifies design and helps reduce overall system cost, while providing energy savings.
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 variable frequency oscillator, fixed 1,6 μs deadtime, bootstrap MOSFET, 15,6 V zener clamp diode on Vcc, and 250 μA startup.
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