OB2531
Overview
- 5% Constant Voltage Regulation at Universal controller for low power AC/DC charger and AC input adaptor applications. It operates in primary-side
- High Precision Constant Current Regulation at sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation. Device operates in PFM in CC mode as well at to large load condition and it operates in PWM with frequency reduction at light/medium load. l OB2531 offers power on soft start control and protection coverage with auto-recovery features tia including Cycle-by-Cycle current limiting, VDD
