Driver IC reduces part count for LED dimming

 The IRS2983 control IC suits single stage flyback and buck-boost topologies used in LED drivers and power supplies. The driver uses primary side regulation that reduces component count and simplifies design by eliminating the opto-isolator and other components necessary for isolated feedback for fixed loads. It requires only 150 μA for startup and has 2.5 mA quiescent current.

The LED control IC features comprehensive protection features including hiccup mode over-voltage protection, cycle-by-cycle over-current protection and open and short circuit protection. 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.