DESCRIPTION
MT7958 is a primary-side controller for AC-DC LED lighting. It operates in constant current control mode and works in discontinuous conduction mode, suitable for flyback converter under universal input.
MT7958 adopts primary side sensing and regulation technology, no secondary side feedback circuit is needed. Further, the loop compensation components are also eliminated while maintaining system stability. With building in 600V power MOSFET, low component counts and low BOM cost are achieved.
By using Maxic proprietary current regulation method, the MT7958 achieves ±3% accuracy of LED current along with excellent line regulation and load regulation.
MT7958 provides plenty of protections, such as LED short circuit protection, LED open circuit protection, over-temperature protection, VDD over voltage protection, VDD under voltage lock-out, etc.

FEATURES
Build in 600V power MOSFET
85V to 265V AC line voltage range
Primary side sensing and regulation, no need of secondary side feedback
High precision constant LED current (±3%)
Cycle-by-cycle peak current control
LED short-circuit/open circuit protection
VDD under voltage lock-out protection
VDD over voltage protection
Over temperature protection
Built-in leading edge blanking (LEB)
Extremely minimum external components
Available in DIP8 package