USR3654A
DESCRIPTION
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.
The UTC USR3654A operates in primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. It also provides off-time modulation to linearly decrease PWM frequency under light-load conditions so that low standby power can be achieved.
The UTC USR3654A achieves high precision CV/CC regulation and high power efficiency. It offers prehensive protection coverage with auto-recovery features including Cycle-by-cycle current limiting, VDD over voltage protection, VDD clamp, OTP, leading edge blanking, VDD under voltage lockout, etc.
DIP-7A DIP-8
- FEATURES
- High Voltage startup circuit
- Built-in 650V Power MOSFET
- ±5% constant voltage regulation at...
