OB2520
OB2520 is High Precision CC/CV Primary-Side Controller manufactured by On-Bright.
- Part of the OB2520-On comparator family.
- Part of the OB2520-On comparator family.
On Bright Confidential to Salp
High Precision CC/CV Primary-Side Controller
GENERAL DESCRIPTION
OB2520 is a high performance offline PSR controller for low power AC/DC charger and adapter applications. It operates in primary-side 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, PFM operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop pensation. The chip consumes very low operation current (typical 300u A), it can achieve less than 30m W standby power to meet strict standby power standard. OB2520 offers prehensive protection coverage with auto-recovery Features including Cycle-by-Cycle current limiting, VDD...
