DESCRIPTION
The UTC The UTC UCL5811 integrates active power factor correction and works in Quasi Resonance mode (QRM) in order to reduce the MOSFET switching losses. With a building in 700V start-up MOSFET, IC can eliminate the power loss caused by start-up resistors to provide a high efficiency solution for lighting applications. The external programmable line voltage compensation provides a more precise output current throughout the universal AC input voltage range. The leading edge blanking circuit on the CS/FB input removes the signal glitch and results in reduced external components and system cost. The multi-protection features of UTC UCL5811 greatly enhance the system reliability and safety. The UTC UCL5811 VDD and output over voltage protection; output short circuit protection, cycle-by-cycle current limit and secondary peak current protection on CS pin, VDD UVLO andauto-restart and over-temperature protection.The driver output voltage is clamped at 18V to protect the external power MOSFET.
Unisonic Technologies
