US1652中文资料PRIMARY-SIDE REGULATION PWM POWER SWITCH数据手册UTC规格书

描述 Description

The UTC US1652 is a primary control switch mode charger andadapter applications. The controlled variable is transferred by anauxiliary winding from the secondary to the primary side. Thedevice integrates PWM controller to enhance the performance ofdiscontinuous conduction mode (DCM) flyback converters.The UTC US1652 operates in primary-side sensing andregulation. Opto-coupler and TL431 could be eliminated. Itoperates in fixed frequency mode at large load conditions,frequency reduction mode at light/medium load and ‘Extendedburst mode’ at No/light load conditions. So that low standby powercan be achieved.The UTC US1652 achieves high precision CV/CC regulationand high power efficiency. It offers comprehensive protectioncoverage with auto-recovery

特性 Features

• Programmable CV and CC regulation
• Primary-side sensing and regulation with No TL431 and opto-coupler
• Multi-mode operation for high efficiency
• Adjustable constant current and output power setting
• Power on soft-start time (4ms)
• Frequency shuffling and adjustable gate drive greatly improving EMI
• ”Extended burst mode control” for improved efficiency and minimum standby design
• Built-in leading edge blanking (LEB)
• VDD under voltage lockout
• VDD over voltage shutdown and clamp
• Cycle-by-Cycle current limiting
• Fail-safe protection for open loop fault condition
• Auto-restart in over voltage condition