Lighting control chip cuts part count for dimming circuits
The IRS2983 employs 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.
The device also features a rapid startup 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 multiple LED lighting applications. 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 features of the IRS2983 include critical-conduction mode operation, with discontinuous and burst modes at light load as well as flexibility allowing opto-isolated feedback circuitry for more complex designs.
Available in an SO-8 package, the IRS2983 uses IR’s advanced high-voltage IC process to deliver protection from electrical over-stress; it also offers micro-power startup, low quiescent current, latch-up immunity and ESD protection and noise immunity.
IRS2983 pricing begins at $0.45 (10,000).
International Rectifier; www.irf.com/product-info/datasheets/data/irs2983spbf.pdf
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