General Description
The SIC9732/SIC9733 is a constant current LED regulator with high current accuracy which applies to single stage step-down power factor corrected LED drivers. 600V power MOSFET is integrated, which can significantly simplify the design of LED lighting system.
High accuracy of output current is achieved by sampling the output current directly. Critical conduction mode operation reduces the switching losses and largely increases the efficiency.
The SIC9732/SIC9733 is supplied from the output directly, and auxiliary winding is not needed.
The SIC9732/SIC9733 has multi-protection functions which largely enhance the safety and reliability of the system, including VDD over-voltage protection, VDD UVLO, short-circuit protection, LED open protection, cycle-by-cycle current limit and over-temperature protection.
The SIC9732/SIC9733 available in Compact SOP-8 package.

Features
·No auxiliary winding
·600V high voltage MOSFET integrated
·High current accuracy of line and load regulation
·High power factor with low output current-ripple
·Critical conduction mode
·High efficiency over wide operating range
·Cycle-by-cycle current limit
·LED short protection
·LED open protection
·Over-temperature protection