UC1100中文资料LOW-POWER HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR数据手册UTC规格书

描述 Description

The UTC UC1100 is a primary control unit for switch modecharger and adapter applications. The controlled variable istransferred by an auxiliary winding from the secondary to theprimary side. The device uses Pulse Frequency Modulation (PFM)method to build discontinuous conduction mode (DCM) flybackpower supplies.The UTC UC1100 operates in primary-side sensing andregulation. Opto-coupler and TL431 could be eliminated. It alsoeliminates the need of loop compensation circuitry whilemaintaining stability. The UTC UC1100 achieves excellentregulation and high average efficiency, yet meets the requirementfor no-load consumption less than 30mW.The UTC UC1100 achieves high precision CV/CC regulationand high power efficiency. It offers comprehensive protectioncoverage with auto-recovery

特性 Features

including Cycle-by-cyclecurrent limiting, output over voltage protection, feedback loop openprotection, short circuit protection, leading edge blanking, VCCunder voltage lockout, etc.  FEATURES   Primary side control for rectangular constant current and constant voltage output 30mW no-load input power feasible Tight CC regulation performance Sub-microampere start-up current Eliminates control loop compensation circuitry Eliminates opto-coupler and secondary CV/CC control circuitry Random frequency modulation to reduce system EMI Flyback topology in DCM operation Open feedback protection Built-in soft start Short circuit protection