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IR control IC geared for LED drivers, power supplies

05 Feb 2014  | Paul Buckley

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International Rectifier has launched its IRS2983 control IC for single stage flyback and buck-boost topologies used in LED drivers and power supplies. The control IC uses primary side regulation that lessens component count and simplifies design by eliminating the opto-isolator and other components necessary for isolated feedback for fixed loads. The device includes a rapid start-up circuit that reduces the turn on time of the system.

The IRS2983 also offers high power factor and low THD and operates over a wide input range for many LED lighting applications. Comprehensive protection features including hiccup mode over-voltage protection, cycle-by-cycle over-current protection, and open and short circuit protection are also included. The device also supports TRIAC dimming.

Other key features of the IRS2983 include critical-conduction mode operation, with discontinuous and burst modes at light load, as well as flexibility allowing easy connection opto-isolated feedback circuitry for more complex designs.

Available in an SO-8 package, the IRS2983 utilises IR's advanced high-voltage IC process to deliver superior protection from electrical over-stress, also offering micro-power start-up, low quiescent current, latch immunity, and ESD protection and noise immunity.

Pricing for the IRS2983 begins at $0.45 each in quantities of 10,000-units. Production quantities are available immediately. The devices are lead-free and RoHS compliant.

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