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RS2123

Part Number	RS2123
Manufacturer	PTC
Description	High Precision CC/CV Primary-Side PWM Power Switch
Published	Feb 23, 2020
Detailed Description	RS2123 High Precision CC/CV Primary-Side PWM Power Switch DESCRIPTION RS2123 is a high performance offline PSR controll...
Datasheet	RS2123 PDF File

Overview

RS2123 High Precision CC/CV Primary-Side PWM Power Switch DESCRIPTION RS2123 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 compensation.
The chi...

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