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IRS2548D LED Driver

International Rectifier's IRS2548D LED control IC increases efficiency, simplifies design, and reduces overall system cost

International Rectifier's LED DriverInternational Rectifier's IRS2548D is a fully integrated, fully protected 600 V LED or switched mode power supply control IC with integrated PFC control for a Boost pre-regulator. The IRS2548D is based on the popular IRS2168D electronic ballast control IC re-designed for use in LED drivers or half-bridge power supply applications. The PFC circuitry operates in critical conduction mode and provides high PF, low THD and DC bus regulation. The IRS2548D features include programmable minimum run frequency and adjustable oscillator frequency that can be driven by an opto isolator or other feedback circuitry in a feedback loop for frequency modulation in resonant systems. The IRS2548D also includes PFC over-voltage and over-current protection, half bridge over-current protection and a logic level enable input that can be used for PWM dimming in LED drivers or general burst mode operation.

The IRS2548D, which combines Power Factor Correction (PFC) and half-bridge drivers in a single IC, offers greater than 88% 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.

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 1.6 μs HO and LO deadtime
  • Internal bootstrap MOSFET
  • Internal 15.6 V zener clamp diode on Vcc
  • Micropower startup (250 μA)
  • Latch immunity and ESD protection

Applications
  • Efficiencies can exceed 90% at higher power levels.
  • The IRS2548D also includes 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).
  • 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
  • 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.

Digi-Key P/N Manufacturer P/N Description  
IRS2548DSPBF-ND IRS2548DSPBF IC PFC Datasheet