OB2512RN
Key Features
- Primary-side sensing and regulation without power switch for low power AC/DC charger and TL431 and opto-coupler adapter applications. It operates in primary-side
- High precision constant voltage and current sensing and regulation. Consequently, regulation at universal AC input opto-coupler and TL431 could be eliminated.
- Multi-mode PWM/PFM operation for efficiency Proprietary Constant Voltage (CV) and Constant improving Current (CC) control is integrated as shown in the
- Good dynamic response figure below.
- Programmable CV and CC regulation In CC control, the current and output power setting
- Built-in line voltage and primary winding can be adjusted externally by the sense resistor inductance compensation Rs at CS pin. In CV control, multi-mode operations
- Programmable cable drop compensation are utilized to achieve high performance and high
- No need for control loop compensation efficiency. In addition, good load regulation is
- Audio noise free operation achieved by the built-in cable drop compensation.
- Internal BJT switch Device operates in PFM in CC mode as well at large load condition and it operates in PWM with frequency reduction at light/medium load. The chip to consumes very low operation current, it can achieve less than 75mW standby power. l OB2512RN offers comprehensive protection coverage with auto-recovery features including tia Cycle-by-Cycle current limiting, VDD over voltage protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO),
