PTC RS2112
RS2112 is a high performance offline PSR controller for low power AC/DC charger and adapter applications. It operates in primary‐ side sensing and regulation. RS2112 offers comprehensive protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VDD over voltage protection, feedback loop open protection, short circuit protection, built‐ in leading edge blanking, VDD under voltage lockout (UVLO), etc.| Part No. | RS2112 |
|---|---|
| Datasheet | RS2112 Download |
| Manufacturer |  PTC |
| Description | High Precision CC/CV Primary-Side PWM Power Switch |
| Buy | Stock & Price |
DESCRIPTION
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 chip consumes very low operation current (typical 350μA), it can achieve less than 30mW standby power to meet strict standby power standard.FEATURES
● ±5% constant voltage regulation at universal AC input● High precision constant current regulation at universal AC input
● Primary-side sensing and regulation without TL431 and opto-coupler
● Programmable CV and CC regulation
● Built-in primary winding inductance compensation
● Programmable cable drop compensation
● Built-in 700V power BJT
● Ultra low start-up current (Typ.
