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OB2513x
High Precision CC/CV Primary-Side PWM Power Switch
GENERAL DESCRIPTION
FEATURES
OB2513x is a high performance offline PSR power Primary-side sensing and regulation without
switch for low power AC/DC charger and adapter
TL431 and opto-coupler
applications. It operates in primary-side sensing High precision constant voltage and current
and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant
regulation at universal AC input Multi-mode PWM/PFM operation for efficiency
Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below.
improving Good dynamic response
In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin.