USRB02 Overview
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.
USRB02 Key Features
- 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 pensation circuitry
- Flyback topology in DCM operation
- Random frequency modulation to reduce system EMI
- Built-in power NPN
- Multi-mode operation for efficiency improving