USR3654A Overview
The UTC USR3654A is a primary control 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.
USR3654A Key Features
- FEATURES
- High Voltage startup circuit
- Built-in 650V Power MOSFET
- ±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 pensation in CV mode
- Flyback topology in DCM operation
- Frequency hopping to reduce system EMI