The IRS2548D switched-mode power supply control IC from International Rectifier (El Segundo, CA) is for high-power LED illumination including LED street lighting, stadium lighting, and theatrical lighting. The device achieves PWM dimming down to less than two percent light output, and offers protection features that include programmable power factor correction and half-bridge over-current protection, latch immunity, and ESD protection. The IRS2548D also includes a variable frequency oscillator, fixed internal 1.6-us deadtime, internal bootstrap MOSFET, internal 15.6-V zener clamp diode on Vcc, and micropower startup (250 μA).

Lighting Technology Magazine

This article first appeared in the November, 2011 issue of Lighting Technology Magazine.

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