USRB02数据手册UTC中文资料规格书

描述 Description

The UTC  USRB02 is a primary controller for charger and adapter applications. The controlled variable is transferred by an auxiliary winding from the secondary to the primary side. The device operates in Pulse Frequency Modulation (PFM) in CC mode as well at large load condition and it operates in Pulse Width Modulation (PWM) with frequency reduction at light/medium load condition. The UTC  USRB02 operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It also eliminates the need of loop compensation circuitry whilemaintaining stability.   The UTC USRB02 achieves high precision CV/CC regulation and high power efficiency. It offers comprehensive protection coverage with auto-recovery

特性 Features

including Cycle-by-cycle current limiting, output over voltage protection, VDD over voltage protection, feedback loop open protection, short circuit protection, leading edge blanking, OTP, VDD under voltage lockout, etc.    FEATURES   ±5% constant voltage regulation at universal AC input Primary side control without TL431 and opto-coupler High precision constant current regulation at universal AC input Programmable CV and CC regulation Eliminates control loop compensation circuitry Flyback topology in DCM operation Random frequency modulation to reduce system EMI Built-in power NPN Multi-mode operation for efficiency improving Programmable cable drop compensation Built-in leading edge blanking Built-in primary winding inductance compensation Built-in line voltage compensation Audio noise free operation Open circuit protection Output over voltage protection VDD over voltage protection Short circuit protection Over temperature protection