UC1103 - Unisonic Technologies

UC1103 HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR

The UTC UC1103 is a primary control unit for switch mode charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device integrates PWM controller to enhance the performance of discontinuous conduction mode (DCM) flyback converters. The UTC UC1103 operates in primary-side sen.

Features

including Cycle-by-cycle current limiting, VDD over voltage protection, VDD clamp, OTP, leading edge blanking, VDD under voltage lockout, etc. SOP-8
 FEATURES
* High voltage startup
* ±5% constant voltage regulation at universal AC input
* High precision constant current regulation at universal AC input
* Primary side control without TL431 and opto-coupler
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Flyback topology in DCM operation
* Frequency hopping to reduce system EMI
 ORDERING INFORMATION
* Driver MOSFET switch
* Built-in leading edge blanking.