描述 Description

The UTC UPSR104? is a primary controller 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? UPSR104? operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It alsoprovides off-time modulation to linearly decrease PWM frequency under light-load conditions so? that low standby power can be achieved. The UTC UPSR104 achieves high precision CV/CC regulationand high power efficiency. It offers comprehensive protection coverage with auto-recovery

特性 Features

including Cycle-by-cycle current limiting, VDD over voltage protection, VDD clamp, OTP, leading edge blanking, VDD under voltage lockout, etc. ?? ?FEATURES ? ±5% Constant Voltage Regulation at Universal AC inputHigh Precision Constant Current Regulation at Universal AC input Primary-side Sensing and Regulation Without TL431 and Opto-coupler?Programmable CV and CC Regulation??Adjustable Constant Current and Output Power Setting??Built-in Secondary Constant Current Control with Primary Side FeedbackBuilt-in Adaptive Current Peak RegulationBuilt-in Primary winding inductance compensationProgrammable Cable drop Compensation??Power on Soft-start?????Built-in Leading Edge Blanking (LEB)??Cycle-by-Cycle Current Limiting??VDD Under Voltage Lockout with Hysteresis (UVLO)?VDD OVP??VDD Clamp